CE-1402 add instance validation to CaseChangeBehavior

Feature/sqs max loops

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/actions/queues/SQSQueuePoller.java

@@ -24,6 +24,7 @@ package com.kingsrook.qqq.backend.core.actions.queues;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 import java.util.function.Supplier;
 import com.amazonaws.auth.AWSStaticCredentialsProvider;
 import com.amazonaws.auth.BasicAWSCredentials;
@@ -41,6 +42,8 @@ import com.kingsrook.qqq.backend.core.model.actions.processes.RunProcessInput;
 import com.kingsrook.qqq.backend.core.model.actions.processes.RunProcessOutput;
 import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
 import com.kingsrook.qqq.backend.core.model.metadata.queues.QQueueMetaData;
+import com.kingsrook.qqq.backend.core.model.metadata.queues.SQSPollerSettings;
+import com.kingsrook.qqq.backend.core.model.metadata.queues.SQSQueueMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.queues.SQSQueueProviderMetaData;
 import com.kingsrook.qqq.backend.core.model.session.QSession;
 
@@ -90,15 +93,17 @@ public class SQSQueuePoller implements Runnable
          }
          queueUrl += queueMetaData.getQueueName();
 
-         while(true)
+         SQSPollerSettings sqsPollerSettings = getSqsPollerSettings(queueProviderMetaData, queueMetaData);
+
+         for(int loop = 0; loop < sqsPollerSettings.getMaxLoops(); loop++)
          {
             ///////////////////////////////
             // fetch a batch of messages //
             ///////////////////////////////
             ReceiveMessageRequest receiveMessageRequest = new ReceiveMessageRequest();
             receiveMessageRequest.setQueueUrl(queueUrl);
-            receiveMessageRequest.setMaxNumberOfMessages(10);
-            receiveMessageRequest.setWaitTimeSeconds(20); // help urge SQS to query multiple servers and find more messages
+            receiveMessageRequest.setMaxNumberOfMessages(sqsPollerSettings.getMaxNumberOfMessages());
+            receiveMessageRequest.setWaitTimeSeconds(sqsPollerSettings.getWaitTimeSeconds()); // larger value (e.g., 20) can help urge SQS to query multiple servers and find more messages
             ReceiveMessageResult receiveMessageResult = sqs.receiveMessage(receiveMessageRequest);
             if(receiveMessageResult.getMessages().isEmpty())
             {
@@ -177,6 +182,47 @@ public class SQSQueuePoller implements Runnable
 
 
 
+   /*******************************************************************************
+    ** For a given queueProvider and queue, get the poller settings to use (using
+    ** default values if none are set at either level).
+    *******************************************************************************/
+   static SQSPollerSettings getSqsPollerSettings(SQSQueueProviderMetaData queueProviderMetaData, QQueueMetaData queueMetaData)
+   {
+      /////////////////////////////////
+      // start with default settings //
+      /////////////////////////////////
+      SQSPollerSettings sqsPollerSettings = new SQSPollerSettings()
+         .withMaxLoops(Integer.MAX_VALUE)
+         .withMaxNumberOfMessages(10)
+         .withWaitTimeSeconds(20);
+
+      /////////////////////////////////////////////////////////////////////
+      // if the queue provider has settings, let them overwrite defaults //
+      /////////////////////////////////////////////////////////////////////
+      if(queueProviderMetaData != null && queueProviderMetaData.getPollerSettings() != null)
+      {
+         SQSPollerSettings providerSettings = queueProviderMetaData.getPollerSettings();
+         sqsPollerSettings.setMaxLoops(Objects.requireNonNullElse(providerSettings.getMaxLoops(), sqsPollerSettings.getMaxLoops()));
+         sqsPollerSettings.setMaxNumberOfMessages(Objects.requireNonNullElse(providerSettings.getMaxNumberOfMessages(), sqsPollerSettings.getMaxNumberOfMessages()));
+         sqsPollerSettings.setWaitTimeSeconds(Objects.requireNonNullElse(providerSettings.getWaitTimeSeconds(), sqsPollerSettings.getWaitTimeSeconds()));
+      }
+
+      ////////////////////////////////////////////////////////////
+      // if the queue has settings, let them overwrite defaults //
+      ////////////////////////////////////////////////////////////
+      if(queueMetaData instanceof SQSQueueMetaData sqsQueueMetaData && sqsQueueMetaData.getPollerSettings() != null)
+      {
+         SQSPollerSettings providerSettings = sqsQueueMetaData.getPollerSettings();
+         sqsPollerSettings.setMaxLoops(Objects.requireNonNullElse(providerSettings.getMaxLoops(), sqsPollerSettings.getMaxLoops()));
+         sqsPollerSettings.setMaxNumberOfMessages(Objects.requireNonNullElse(providerSettings.getMaxNumberOfMessages(), sqsPollerSettings.getMaxNumberOfMessages()));
+         sqsPollerSettings.setWaitTimeSeconds(Objects.requireNonNullElse(providerSettings.getWaitTimeSeconds(), sqsPollerSettings.getWaitTimeSeconds()));
+      }
+
+      return sqsPollerSettings;
+   }
+
+
+
    /*******************************************************************************
     ** Setter for queueProviderMetaData
     **

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/actions/scripts/logging/BuildScriptLogAndScriptLogLineExecutionLogger.java

@@ -94,7 +94,7 @@ public class BuildScriptLogAndScriptLogLineExecutionLogger implements QCodeExecu
    protected QRecord buildDetailLogRecord(String logLine)
    {
       return (new QRecord()
-         .withValue("scriptLogId", scriptLog.getValue("id"))
+         .withValue("scriptLogId", scriptLog == null ? null : scriptLog.getValue("id"))
          .withValue("timestamp", Instant.now())
          .withValue("text", truncate(logLine)));
    }
@@ -145,6 +145,14 @@ public class BuildScriptLogAndScriptLogLineExecutionLogger implements QCodeExecu
       {
          this.executeCodeInput = executeCodeInput;
          this.scriptLog = buildHeaderRecord(executeCodeInput);
+
+         if(scriptLogLines != null)
+         {
+            for(QRecord scriptLogLine : scriptLogLines)
+            {
+               scriptLogLine.setValue("scriptLogId", scriptLog.getValue("id"));
+            }
+         }
       }
       catch(Exception e)
       {

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/actions/tables/AggregateAction.java

@@ -22,9 +22,12 @@
 package com.kingsrook.qqq.backend.core.actions.tables;
 
 
+import java.util.Collections;
 import com.kingsrook.qqq.backend.core.actions.ActionHelper;
 import com.kingsrook.qqq.backend.core.actions.interfaces.AggregateInterface;
 import com.kingsrook.qqq.backend.core.actions.tables.helpers.QueryStatManager;
+import com.kingsrook.qqq.backend.core.actions.values.ValueBehaviorApplier;
+import com.kingsrook.qqq.backend.core.context.QContext;
 import com.kingsrook.qqq.backend.core.exceptions.QException;
 import com.kingsrook.qqq.backend.core.logging.QLogger;
 import com.kingsrook.qqq.backend.core.model.actions.tables.aggregate.AggregateInput;
@@ -58,6 +61,11 @@ public class AggregateAction
       QTableMetaData   table   = aggregateInput.getTable();
       QBackendMetaData backend = aggregateInput.getBackend();
 
+      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      // apply any available field behaviors to the filter (noting that, if anything changes, a new filter is returned) //
+      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      aggregateInput.setFilter(ValueBehaviorApplier.applyFieldBehaviorsToFilter(QContext.getQInstance(), table, aggregateInput.getFilter(), Collections.emptySet()));
+
       QueryStat queryStat = QueryStatManager.newQueryStat(backend, table, aggregateInput.getFilter());
 
       QBackendModuleDispatcher qBackendModuleDispatcher = new QBackendModuleDispatcher();
@@ -67,6 +75,10 @@ public class AggregateAction
       aggregateInterface.setQueryStat(queryStat);
       AggregateOutput aggregateOutput = aggregateInterface.execute(aggregateInput);
 
+      // todo, maybe, not real important? ValueBehaviorApplier.applyFieldBehaviors(ValueBehaviorApplier.Action.READ, QContext.getQInstance(), table, aggregateOutput.getResults(), null);
+      //  issue being, the signature there... it takes a list of QRecords, which aren't what we have...
+      //  do we want to ... idk, refactor all these behavior deals?  hmm... maybe a new interface/ for ones that do reads?  not sure.
+
       QueryStatManager.getInstance().add(queryStat);
 
       return aggregateOutput;

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/actions/tables/CountAction.java

@@ -22,9 +22,12 @@
 package com.kingsrook.qqq.backend.core.actions.tables;
 
 
+import java.util.Collections;
 import com.kingsrook.qqq.backend.core.actions.ActionHelper;
 import com.kingsrook.qqq.backend.core.actions.interfaces.CountInterface;
 import com.kingsrook.qqq.backend.core.actions.tables.helpers.QueryStatManager;
+import com.kingsrook.qqq.backend.core.actions.values.ValueBehaviorApplier;
+import com.kingsrook.qqq.backend.core.context.QContext;
 import com.kingsrook.qqq.backend.core.exceptions.QException;
 import com.kingsrook.qqq.backend.core.logging.QLogger;
 import com.kingsrook.qqq.backend.core.model.actions.tables.count.CountInput;
@@ -58,6 +61,11 @@ public class CountAction
       QTableMetaData   table   = countInput.getTable();
       QBackendMetaData backend = countInput.getBackend();
 
+      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      // apply any available field behaviors to the filter (noting that, if anything changes, a new filter is returned) //
+      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      countInput.setFilter(ValueBehaviorApplier.applyFieldBehaviorsToFilter(QContext.getQInstance(), table, countInput.getFilter(), Collections.emptySet()));
+
       QueryStat queryStat = QueryStatManager.newQueryStat(backend, table, countInput.getFilter());
 
       QBackendModuleDispatcher qBackendModuleDispatcher = new QBackendModuleDispatcher();

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/actions/tables/GetAction.java

@@ -23,6 +23,8 @@ package com.kingsrook.qqq.backend.core.actions.tables;
 
 
 import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -34,8 +36,10 @@ import com.kingsrook.qqq.backend.core.actions.interfaces.GetInterface;
 import com.kingsrook.qqq.backend.core.actions.tables.helpers.GetActionCacheHelper;
 import com.kingsrook.qqq.backend.core.actions.values.QPossibleValueTranslator;
 import com.kingsrook.qqq.backend.core.actions.values.QValueFormatter;
+import com.kingsrook.qqq.backend.core.actions.values.ValueBehaviorApplier;
 import com.kingsrook.qqq.backend.core.context.QContext;
 import com.kingsrook.qqq.backend.core.exceptions.QException;
+import com.kingsrook.qqq.backend.core.logging.QLogger;
 import com.kingsrook.qqq.backend.core.model.actions.tables.get.GetInput;
 import com.kingsrook.qqq.backend.core.model.actions.tables.get.GetOutput;
 import com.kingsrook.qqq.backend.core.model.actions.tables.query.QCriteriaOperator;
@@ -45,11 +49,16 @@ import com.kingsrook.qqq.backend.core.model.actions.tables.query.QueryInput;
 import com.kingsrook.qqq.backend.core.model.actions.tables.query.QueryOutput;
 import com.kingsrook.qqq.backend.core.model.data.QRecord;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.AdornmentType;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldBehavior;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldFilterBehavior;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
 import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleDispatcher;
 import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
+import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
 import com.kingsrook.qqq.backend.core.utils.ObjectUtils;
+import com.kingsrook.qqq.backend.core.utils.Pair;
+import com.kingsrook.qqq.backend.core.utils.memoization.Memoization;
 
 
 /*******************************************************************************
@@ -58,11 +67,15 @@ import com.kingsrook.qqq.backend.core.utils.ObjectUtils;
  *******************************************************************************/
 public class GetAction
 {
+   private static final QLogger LOG = QLogger.getLogger(GetAction.class);
+
    private Optional<TableCustomizerInterface> postGetRecordCustomizer;
 
    private GetInput                 getInput;
    private QPossibleValueTranslator qPossibleValueTranslator;
 
+   private Memoization<Pair<String, String>, List<FieldFilterBehavior<?>>> getFieldFilterBehaviorMemoization = new Memoization<>();
+
 
 
    /*******************************************************************************
@@ -105,6 +118,8 @@ public class GetAction
          usingDefaultGetInterface = true;
       }
 
+      getInput = applyFieldBehaviors(getInput);
+
       getInterface.validateInput(getInput);
       getOutput = getInterface.execute(getInput);
 
@@ -130,6 +145,82 @@ public class GetAction
 
 
 
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   private GetInput applyFieldBehaviors(GetInput getInput)
+   {
+      QTableMetaData table = getInput.getTable();
+
+      try
+      {
+         if(getInput.getPrimaryKey() != null)
+         {
+            ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+            // if the input has a primary key, get its behaviors, then apply, and update the pkey in the input if the value is different //
+            ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+            List<FieldFilterBehavior<?>> fieldFilterBehaviors = getFieldFilterBehaviors(table, table.getPrimaryKeyField());
+            for(FieldFilterBehavior<?> fieldFilterBehavior : CollectionUtils.nonNullList(fieldFilterBehaviors))
+            {
+               QFilterCriteria pkeyCriteria    = new QFilterCriteria(table.getPrimaryKeyField(), QCriteriaOperator.EQUALS, getInput.getPrimaryKey());
+               QFilterCriteria updatedCriteria = ValueBehaviorApplier.apply(pkeyCriteria, QContext.getQInstance(), table, table.getField(table.getPrimaryKeyField()), fieldFilterBehavior);
+               if(updatedCriteria != pkeyCriteria)
+               {
+                  getInput.setPrimaryKey(updatedCriteria.getValues().get(0));
+               }
+            }
+         }
+         else if(getInput.getUniqueKey() != null)
+         {
+            ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+            // if the input has a unique key, get its behaviors, then apply, and update the ukey values in the input if any are different //
+            ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+            Map<String, Serializable> updatedUniqueKey = new HashMap<>(getInput.getUniqueKey());
+            for(String fieldName : getInput.getUniqueKey().keySet())
+            {
+               List<FieldFilterBehavior<?>> fieldFilterBehaviors = getFieldFilterBehaviors(table, fieldName);
+               for(FieldFilterBehavior<?> fieldFilterBehavior : CollectionUtils.nonNullList(fieldFilterBehaviors))
+               {
+                  QFilterCriteria ukeyCriteria    = new QFilterCriteria(fieldName, QCriteriaOperator.EQUALS, updatedUniqueKey.get(fieldName));
+                  QFilterCriteria updatedCriteria = ValueBehaviorApplier.apply(ukeyCriteria, QContext.getQInstance(), table, table.getField(table.getPrimaryKeyField()), fieldFilterBehavior);
+                  updatedUniqueKey.put(fieldName, updatedCriteria.getValues().get(0));
+               }
+            }
+            getInput.setUniqueKey(updatedUniqueKey);
+         }
+      }
+      catch(Exception e)
+      {
+         LOG.warn("Error applying field behaviors to get input - will run with original inputs", e);
+      }
+
+      return (getInput);
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   private List<FieldFilterBehavior<?>> getFieldFilterBehaviors(QTableMetaData tableMetaData, String fieldName)
+   {
+      Pair<String, String> key = new Pair<>(tableMetaData.getName(), fieldName);
+      return getFieldFilterBehaviorMemoization.getResult(key, (p) ->
+      {
+         List<FieldFilterBehavior<?>> rs = new ArrayList<>();
+         for(FieldBehavior<?> fieldBehavior : tableMetaData.getFields().get(fieldName).getBehaviors())
+         {
+            if(fieldBehavior instanceof FieldFilterBehavior<?> fieldFilterBehavior)
+            {
+               rs.add(fieldFilterBehavior);
+            }
+         }
+         return (rs);
+      }).orElse(null);
+   }
+
+
+
    /*******************************************************************************
     ** shorthand way to call for the most common use-case, when you just want the
     ** output record to be returned.
@@ -255,6 +346,8 @@ public class GetAction
          returnRecord = postGetRecordCustomizer.get().postQuery(getInput, List.of(record)).get(0);
       }
 
+      ValueBehaviorApplier.applyFieldBehaviors(ValueBehaviorApplier.Action.READ, QContext.getQInstance(), getInput.getTable(), List.of(record), null);
+
       if(getInput.getShouldTranslatePossibleValues())
       {
          if(qPossibleValueTranslator == null)

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/actions/tables/QueryAction.java

@@ -25,6 +25,7 @@ package com.kingsrook.qqq.backend.core.actions.tables;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
@@ -41,6 +42,7 @@ import com.kingsrook.qqq.backend.core.actions.tables.helpers.QueryActionCacheHel
 import com.kingsrook.qqq.backend.core.actions.tables.helpers.QueryStatManager;
 import com.kingsrook.qqq.backend.core.actions.values.QPossibleValueTranslator;
 import com.kingsrook.qqq.backend.core.actions.values.QValueFormatter;
+import com.kingsrook.qqq.backend.core.actions.values.ValueBehaviorApplier;
 import com.kingsrook.qqq.backend.core.context.QContext;
 import com.kingsrook.qqq.backend.core.exceptions.QException;
 import com.kingsrook.qqq.backend.core.logging.QLogger;
@@ -117,6 +119,11 @@ public class QueryAction
          }
       }
 
+      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      // apply any available field behaviors to the filter (noting that, if anything changes, a new filter is returned) //
+      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      queryInput.setFilter(ValueBehaviorApplier.applyFieldBehaviorsToFilter(QContext.getQInstance(), table, queryInput.getFilter(), Collections.emptySet()));
+
       QueryStat queryStat = QueryStatManager.newQueryStat(backend, table, queryInput.getFilter());
 
       QBackendModuleDispatcher qBackendModuleDispatcher = new QBackendModuleDispatcher();
@@ -284,6 +291,8 @@ public class QueryAction
          records = postQueryRecordCustomizer.get().postQuery(queryInput, records);
       }
 
+      ValueBehaviorApplier.applyFieldBehaviors(ValueBehaviorApplier.Action.READ, QContext.getQInstance(), queryInput.getTable(), records, null);
+
       if(queryInput.getShouldTranslatePossibleValues())
       {
          if(qPossibleValueTranslator == null)

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/actions/values/ValueBehaviorApplier.java

@@ -22,12 +22,18 @@
 package com.kingsrook.qqq.backend.core.actions.values;
 
 
+import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 import java.util.Set;
+import com.kingsrook.qqq.backend.core.model.actions.tables.query.QFilterCriteria;
+import com.kingsrook.qqq.backend.core.model.actions.tables.query.QQueryFilter;
 import com.kingsrook.qqq.backend.core.model.data.QRecord;
 import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldBehavior;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldDisplayBehavior;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldFilterBehavior;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
 import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
@@ -46,6 +52,7 @@ public class ValueBehaviorApplier
    {
       INSERT,
       UPDATE,
+      READ,
       FORMATTING
    }
 
@@ -97,4 +104,171 @@ public class ValueBehaviorApplier
       }
    }
 
+
+
+   /*******************************************************************************
+    ** apply field behaviors (of FieldFilterBehavior type) to a QQueryFilter.
+    ** note that, we don't like to ever edit a QQueryFilter itself (e.g., as it might
+    ** have come from meta-data, or it might have some immutable structures in it).
+    ** So, if any changes are needed, they'll be returned in a clone.
+    ** So, either way, you should use this method like:
+    *
+    ** QQueryFilter myFilter = // wherever I got my filter from
+    ** myFilter = ValueBehaviorApplier.applyFieldBehaviorsToFilter(QContext.getInstance, table, myFilter, null);
+    ** // e.g., always re-assign over top of your filter.
+    *******************************************************************************/
+   public static QQueryFilter applyFieldBehaviorsToFilter(QInstance instance, QTableMetaData table, QQueryFilter filter, Set<FieldBehavior<?>> behaviorsToOmit)
+   {
+      ////////////////////////////////////////////////
+      // for null or empty filter, return the input //
+      ////////////////////////////////////////////////
+      if(filter == null || !filter.hasAnyCriteria())
+      {
+         return (filter);
+      }
+
+      ///////////////////////////////////////////////////////////////////
+      // track if we need to make & return a clone.                    //
+      // which will be the case if we get back any different criteria, //
+      // or any different sub-filters, than what we originally had.    //
+      ///////////////////////////////////////////////////////////////////
+      boolean needToUseClone = false;
+
+      ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      // make a new criteria list, and a new subFilter list - either null, if the source was null, or a new array list //
+      ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      List<QFilterCriteria> newCriteriaList = filter.getCriteria() == null ? null : new ArrayList<>();
+      List<QQueryFilter>    newSubFilters   = filter.getSubFilters() == null ? null : new ArrayList<>();
+
+      //////////////////////////////////////////////////////////////////////////////
+      // for each criteria, if its field has any applicable behaviors, apply them //
+      //////////////////////////////////////////////////////////////////////////////
+      for(QFilterCriteria criteria : CollectionUtils.nonNullList(filter.getCriteria()))
+      {
+         QFieldMetaData field = table.getFields().get(criteria.getFieldName());
+         if(field == null && criteria.getFieldName() != null && criteria.getFieldName().contains("."))
+         {
+            String[] parts = criteria.getFieldName().split("\\.");
+            if(parts.length == 2)
+            {
+               QTableMetaData joinTable = instance.getTable(parts[0]);
+               if(joinTable != null)
+               {
+                  field = joinTable.getFields().get(parts[1]);
+               }
+            }
+         }
+
+         if(field != null)
+         {
+            for(FieldBehavior<?> fieldBehavior : CollectionUtils.nonNullCollection(field.getBehaviors()))
+            {
+               boolean applyBehavior = true;
+               if(behaviorsToOmit != null && behaviorsToOmit.contains(fieldBehavior))
+               {
+                  applyBehavior = false;
+               }
+
+               if(applyBehavior && fieldBehavior instanceof FieldFilterBehavior<?> filterBehavior)
+               {
+                  //////////////////////////////////////////////////////////////////////
+                  // call to apply the behavior on the criteria - which will return a //
+                  // new criteria if any values are changed, else the input criteria  //
+                  //////////////////////////////////////////////////////////////////////
+                  QFilterCriteria newCriteria = apply(criteria, instance, table, field, filterBehavior);
+
+                  if(newCriteria != criteria)
+                  {
+                     ////////////////////////////////////////////////////////////////////////////////////////////////////////////
+                     // if the new criteria is not the same as the old criteria, mark that we need to make and return a clone. //
+                     ////////////////////////////////////////////////////////////////////////////////////////////////////////////
+                     newCriteriaList.add(newCriteria);
+                     needToUseClone = true;
+                  }
+                  else
+                  {
+                     newCriteriaList.add(criteria);
+                  }
+               }
+            }
+         }
+      }
+
+      /////////////////////////////////////////////////////////////////////////////////////////////////
+      // similar to above - iterate over the subfilters, making a recursive call, and tracking if we //
+      // got back the same object (in which case, there are no changes, and we don't need to clone), //
+      // or a different object (in which case, we do need a clone, because there were changes).      //
+      /////////////////////////////////////////////////////////////////////////////////////////////////
+      for(QQueryFilter subFilter : CollectionUtils.nonNullList(filter.getSubFilters()))
+      {
+         QQueryFilter newSubFilter = applyFieldBehaviorsToFilter(instance, table, subFilter, behaviorsToOmit);
+         if(newSubFilter != subFilter)
+         {
+            newSubFilters.add(newSubFilter);
+            needToUseClone = true;
+         }
+         else
+         {
+            newSubFilters.add(subFilter);
+         }
+      }
+
+      //////////////////////////////////////////////////////////////////////////////////////////////////
+      // if we need to return a clone, then do so, replacing the lists with the ones we built in here //
+      //////////////////////////////////////////////////////////////////////////////////////////////////
+      if(needToUseClone)
+      {
+         QQueryFilter cloneFilter = filter.clone();
+         cloneFilter.setCriteria(newCriteriaList);
+         cloneFilter.setSubFilters(newSubFilters);
+         return (cloneFilter);
+      }
+
+      /////////////////////////////////////////////////////////////////////////////
+      // else, if no clone needed (e.g., no changes), return the original filter //
+      /////////////////////////////////////////////////////////////////////////////
+      return (filter);
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   public static QFilterCriteria apply(QFilterCriteria criteria, QInstance instance, QTableMetaData table, QFieldMetaData field, FieldFilterBehavior<?> filterBehavior)
+   {
+      if(criteria == null || CollectionUtils.nullSafeIsEmpty(criteria.getValues()))
+      {
+         return (criteria);
+      }
+
+      List<Serializable> newValues  = new ArrayList<>();
+      boolean            changedAny = false;
+
+      for(Serializable value : criteria.getValues())
+      {
+         Serializable newValue = filterBehavior.applyToFilterCriteriaValue(value, instance, table, field);
+         if(!Objects.equals(value, newValue))
+         {
+            newValues.add(newValue);
+            changedAny = true;
+         }
+         else
+         {
+            newValues.add(value);
+         }
+      }
+
+      if(changedAny)
+      {
+         QFilterCriteria clone = criteria.clone();
+         clone.setValues(newValues);
+         return (clone);
+      }
+      else
+      {
+         return (criteria);
+      }
+   }
+
 }

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/instances/QInstanceValidationState.java

@@ -0,0 +1,34 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2022.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.instances;
+
+
+/*******************************************************************************
+ ** Object used to record state of a QInstance having been validated.
+ **
+ *******************************************************************************/
+public enum QInstanceValidationState
+{
+   PENDING,
+   RUNNING,
+   COMPLETE
+}

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/instances/QInstanceValidator.java

@@ -79,6 +79,8 @@ import com.kingsrook.qqq.backend.core.model.metadata.processes.QStepMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.processes.QSupplementalProcessMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.queues.QQueueMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.queues.QQueueProviderMetaData;
+import com.kingsrook.qqq.backend.core.model.metadata.queues.QueueType;
+import com.kingsrook.qqq.backend.core.model.metadata.queues.SQSQueueMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.queues.SQSQueueProviderMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.reporting.QReportDataSource;
 import com.kingsrook.qqq.backend.core.model.metadata.reporting.QReportField;
@@ -139,14 +141,20 @@ public class QInstanceValidator
     *******************************************************************************/
    public void validate(QInstance qInstance) throws QInstanceValidationException
    {
-      if(qInstance.getHasBeenValidated())
+      if(qInstance.getHasBeenValidated() || qInstance.getValidationIsRunning())
       {
-         //////////////////////////////////////////
-         // don't re-validate if previously done //
-         //////////////////////////////////////////
+         ///////////////////////////////////////////////////////////////////////////////////////////////////////////
+         // don't re-validate if previously complete or currently running (avoids recursive re-validation chaos!) //
+         ///////////////////////////////////////////////////////////////////////////////////////////////////////////
          return;
       }
 
+      ////////////////////////////////////
+      // mark validation as running now //
+      ////////////////////////////////////
+      QInstanceValidationKey validationKey = new QInstanceValidationKey();
+      qInstance.setValidationIsRunning(validationKey);
+
       /////////////////////////////////////////////////////////////////////////////////////////////////////
       // the enricher will build a join graph (if there are any joins).  we'd like to only do that       //
       // once, during the enrichment/validation work, so, capture it, and store it back in the instance. //
@@ -207,9 +215,11 @@ public class QInstanceValidator
          throw (new QInstanceValidationException(errors));
       }
 
-      QInstanceValidationKey validationKey = new QInstanceValidationKey();
-      qInstance.setHasBeenValidated(validationKey);
+      //////////////////////////////
+      // mark validation complete //
+      //////////////////////////////
       qInstance.setJoinGraph(validationKey, joinGraph);
+      qInstance.setHasBeenValidated(validationKey);
    }
 
 
@@ -431,11 +441,30 @@ public class QInstanceValidator
 
             if(queueProvider instanceof SQSQueueProviderMetaData sqsQueueProvider)
             {
+               if(queueProvider.getType() != null)
+               {
+                  assertCondition(queueProvider.getType().equals(QueueType.SQS), "Inconsistent Type/class given for queueProvider: " + name + " (SQSQueueProviderMetaData is not allowed for type " + queueProvider.getType() + ")");
+               }
+
                assertCondition(StringUtils.hasContent(sqsQueueProvider.getAccessKey()), "Missing accessKey for SQSQueueProvider: " + name);
                assertCondition(StringUtils.hasContent(sqsQueueProvider.getSecretKey()), "Missing secretKey for SQSQueueProvider: " + name);
                assertCondition(StringUtils.hasContent(sqsQueueProvider.getBaseURL()), "Missing baseURL for SQSQueueProvider: " + name);
                assertCondition(StringUtils.hasContent(sqsQueueProvider.getRegion()), "Missing region for SQSQueueProvider: " + name);
             }
+            else if(queueProvider.getClass().equals(QQueueProviderMetaData.class))
+            {
+               /////////////////////////////////////////////////////////////////////
+               // this just means a subtype wasn't used, so, it should be allowed //
+               // (unless we had a case where a type required a subtype?)         //
+               /////////////////////////////////////////////////////////////////////
+            }
+            else
+            {
+               if(queueProvider.getType() != null)
+               {
+                  assertCondition(!queueProvider.getType().equals(QueueType.SQS), "Inconsistent Type/class given for queueProvider: " + name + " (" + queueProvider.getClass().getSimpleName() + " is not allowed for type " + queueProvider.getType() + ")");
+               }
+            }
 
             runPlugins(QQueueProviderMetaData.class, queueProvider, qInstance);
          });
@@ -446,7 +475,27 @@ public class QInstanceValidator
          qInstance.getQueues().forEach((name, queue) ->
          {
             assertCondition(Objects.equals(name, queue.getName()), "Inconsistent naming for queue: " + name + "/" + queue.getName() + ".");
-            assertCondition(qInstance.getQueueProvider(queue.getProviderName()) != null, "Unrecognized queue providerName for queue: " + name);
+
+            QQueueProviderMetaData queueProvider = qInstance.getQueueProvider(queue.getProviderName());
+            if(assertCondition(queueProvider != null, "Unrecognized queue providerName for queue: " + name))
+            {
+               if(queue instanceof SQSQueueMetaData)
+               {
+                  assertCondition(queueProvider.getType().equals(QueueType.SQS), "Inconsistent class given for queueMetaData: " + name + " (SQSQueueMetaData is not allowed for queue provider of type " + queueProvider.getType() + ")");
+               }
+               else if(queue.getClass().equals(QQueueMetaData.class))
+               {
+                  ////////////////////////////////////////////////////////////////////
+                  // this just means a subtype wasn't used, so, it should be        //
+                  // allowed (unless we had a case where a type required a subtype? //
+                  ////////////////////////////////////////////////////////////////////
+               }
+               else
+               {
+                  assertCondition(!queueProvider.getType().equals(QueueType.SQS), "Inconsistent class given for queueProvider: " + name + " (" + queue.getClass().getSimpleName() + " is not allowed for type " + queueProvider.getType() + ")");
+               }
+            }
+
             assertCondition(StringUtils.hasContent(queue.getQueueName()), "Missing queueName for queue: " + name);
             if(assertCondition(StringUtils.hasContent(queue.getProcessName()), "Missing processName for queue: " + name))
             {

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/QInstance.java

@@ -35,6 +35,7 @@ import com.kingsrook.qqq.backend.core.actions.metadata.MetaDataAction;
 import com.kingsrook.qqq.backend.core.exceptions.QException;
 import com.kingsrook.qqq.backend.core.instances.QInstanceHelpContentManager;
 import com.kingsrook.qqq.backend.core.instances.QInstanceValidationKey;
+import com.kingsrook.qqq.backend.core.instances.QInstanceValidationState;
 import com.kingsrook.qqq.backend.core.model.actions.AbstractActionInput;
 import com.kingsrook.qqq.backend.core.model.actions.metadata.MetaDataInput;
 import com.kingsrook.qqq.backend.core.model.actions.metadata.MetaDataOutput;
@@ -112,10 +113,13 @@ public class QInstance
    private QPermissionRules defaultPermissionRules = QPermissionRules.defaultInstance();
    private QAuditRules      defaultAuditRules      = QAuditRules.defaultInstanceLevelNone();
 
-   // todo - lock down the object (no more changes allowed) after it's been validated?
+   //////////////////////////////////////////////////////////////////////////////////////
+   // todo - lock down the object (no more changes allowed) after it's been validated? //
+   //  if doing so, may need to copy all of the collections into read-only versions... //
+   //////////////////////////////////////////////////////////////////////////////////////
 
    @JsonIgnore
-   private boolean hasBeenValidated = false;
+   private QInstanceValidationState validationState = QInstanceValidationState.PENDING;
 
    private Map<String, String> memoizedTablePaths   = new HashMap<>();
    private Map<String, String> memoizedProcessPaths = new HashMap<>();
@@ -799,32 +803,58 @@ public class QInstance
     *******************************************************************************/
    public boolean getHasBeenValidated()
    {
-      return hasBeenValidated;
+      return validationState.equals(QInstanceValidationState.COMPLETE);
    }
 
 
 
    /*******************************************************************************
     ** If pass a QInstanceValidationKey (which can only be instantiated by the validator),
-    ** then the hasBeenValidated field will be set to true.
+    ** then the validationState will be set to COMPLETE.
     **
-    ** Else, if passed a null, hasBeenValidated will be reset to false - e.g., to
+    ** Else, if passed a null, the validationState will be reset to PENDING.  e.g., to
     ** re-trigger validation (can be useful in tests).
     *******************************************************************************/
    public void setHasBeenValidated(QInstanceValidationKey key)
    {
       if(key == null)
       {
-         this.hasBeenValidated = false;
+         this.validationState = QInstanceValidationState.PENDING;
       }
       else
       {
-         this.hasBeenValidated = true;
+         this.validationState = QInstanceValidationState.COMPLETE;
       }
    }
 
 
 
+   /*******************************************************************************
+    ** If pass a QInstanceValidationKey (which can only be instantiated by the validator),
+    ** then the validationState set to RUNNING.
+    **
+    *******************************************************************************/
+   public void setValidationIsRunning(QInstanceValidationKey key)
+   {
+      if(key != null)
+      {
+         this.validationState = QInstanceValidationState.RUNNING;
+      }
+   }
+
+
+
+   /*******************************************************************************
+    ** check if the instance is currently running validation.
+    **
+    *******************************************************************************/
+   public boolean getValidationIsRunning()
+   {
+      return validationState.equals(QInstanceValidationState.RUNNING);
+   }
+
+
+
    /*******************************************************************************
     ** Getter for branding
     **

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/fields/CaseChangeBehavior.java

@@ -0,0 +1,172 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2024.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.model.metadata.fields;
+
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Function;
+import com.kingsrook.qqq.backend.core.actions.values.ValueBehaviorApplier;
+import com.kingsrook.qqq.backend.core.model.data.QRecord;
+import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
+import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
+import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
+
+
+/*******************************************************************************
+ ** Field behavior that changes the case of string values.
+ *******************************************************************************/
+public enum CaseChangeBehavior implements FieldBehavior<CaseChangeBehavior>, FieldBehaviorForFrontend, FieldFilterBehavior<CaseChangeBehavior>
+{
+   NONE(null),
+   TO_UPPER_CASE((String s) -> s.toUpperCase()),
+   TO_LOWER_CASE((String s) -> s.toLowerCase());
+
+
+   private final Function<String, String> function;
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   CaseChangeBehavior(Function<String, String> function)
+   {
+      this.function = function;
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Override
+   public CaseChangeBehavior getDefault()
+   {
+      return (NONE);
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Override
+   public void apply(ValueBehaviorApplier.Action action, List<QRecord> recordList, QInstance instance, QTableMetaData table, QFieldMetaData field)
+   {
+      if(this.equals(NONE))
+      {
+         return;
+      }
+
+      switch(this)
+      {
+         case TO_UPPER_CASE, TO_LOWER_CASE -> applyFunction(recordList, table, field);
+         default -> throw new IllegalStateException("Unexpected enum value: " + this);
+      }
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   private void applyFunction(List<QRecord> recordList, QTableMetaData table, QFieldMetaData field)
+   {
+      String fieldName = field.getName();
+      for(QRecord record : CollectionUtils.nonNullList(recordList))
+      {
+         String value = record.getValueString(fieldName);
+         if(value != null && function != null)
+         {
+            record.setValue(fieldName, function.apply(value));
+         }
+      }
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Override
+   public Serializable applyToFilterCriteriaValue(Serializable value, QInstance instance, QTableMetaData table, QFieldMetaData field)
+   {
+      if(this.equals(NONE) || function == null)
+      {
+         return (value);
+      }
+
+      if(value instanceof String s)
+      {
+         String newValue = function.apply(s);
+         if(!Objects.equals(value, newValue))
+         {
+            return (newValue);
+         }
+      }
+
+      return (value);
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Override
+   public boolean allowMultipleBehaviorsOfThisType()
+   {
+      return (false);
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Override
+   public List<String> validateBehaviorConfiguration(QTableMetaData tableMetaData, QFieldMetaData fieldMetaData)
+   {
+      if(this == NONE)
+      {
+         return Collections.emptyList();
+      }
+
+      List<String> errors      = new ArrayList<>();
+      String       errorSuffix = " field [" + fieldMetaData.getName() + "] in table [" + tableMetaData.getName() + "]";
+
+      if(fieldMetaData.getType() != null)
+      {
+         if(!fieldMetaData.getType().isStringLike())
+         {
+            errors.add("A CaseChange was a applied to a non-String-like field:" + errorSuffix);
+         }
+      }
+
+      return (errors);
+   }
+
+}

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/fields/FieldBehaviorForFrontend.java

@@ -0,0 +1,34 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2024.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.model.metadata.fields;
+
+
+import java.io.Serializable;
+
+
+/*******************************************************************************
+ ** Marker interface for a field behavior which you might want to send to a
+ ** frontend (e.g., so it can edit values to match what'll happen in the backend).
+ *******************************************************************************/
+public interface FieldBehaviorForFrontend extends Serializable
+{
+}

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/fields/FieldDisplayBehavior.java

@@ -23,7 +23,8 @@ package com.kingsrook.qqq.backend.core.model.metadata.fields;
 
 
 /*******************************************************************************
- **
+ ** Interface to mark a field behavior as one to be used during generating
+ ** display values.
  *******************************************************************************/
 public interface FieldDisplayBehavior<T extends FieldDisplayBehavior<T>> extends FieldBehavior<T>
 {

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/fields/FieldFilterBehavior.java

@@ -0,0 +1,43 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2024.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.model.metadata.fields;
+
+
+import java.io.Serializable;
+import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
+import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
+
+
+/*******************************************************************************
+ ** Interface to mark a field behavior as one to be used before a query filter
+ ** is executed.
+ *******************************************************************************/
+public interface FieldFilterBehavior<T extends FieldFilterBehavior<T>> extends FieldBehavior<T>
+{
+
+   /*******************************************************************************
+    ** Apply the filter to a value from a criteria.
+    ** If you don't want to change the input value, return the parameter.
+    *******************************************************************************/
+   Serializable applyToFilterCriteriaValue(Serializable value, QInstance instance, QTableMetaData table, QFieldMetaData field);
+
+}

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/frontend/QFrontendFieldMetaData.java

@@ -23,13 +23,17 @@ package com.kingsrook.qqq.backend.core.model.metadata.frontend;
 
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.List;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonInclude.Include;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldAdornment;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldBehavior;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldBehaviorForFrontend;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldType;
 import com.kingsrook.qqq.backend.core.model.metadata.help.QHelpContent;
+import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
 
 
 /*******************************************************************************
@@ -53,6 +57,8 @@ public class QFrontendFieldMetaData
    private List<FieldAdornment> adornments;
    private List<QHelpContent>   helpContents;
 
+   private List<FieldBehaviorForFrontend> fieldBehaviors;
+
    //////////////////////////////////////////////////////////////////////////////////
    // do not add setters.  take values from the source-object in the constructor!! //
    //////////////////////////////////////////////////////////////////////////////////
@@ -75,6 +81,18 @@ public class QFrontendFieldMetaData
       this.adornments = fieldMetaData.getAdornments();
       this.defaultValue = fieldMetaData.getDefaultValue();
       this.helpContents = fieldMetaData.getHelpContents();
+
+      for(FieldBehavior<?> behavior : CollectionUtils.nonNullCollection(fieldMetaData.getBehaviors()))
+      {
+         if(behavior instanceof FieldBehaviorForFrontend fbff)
+         {
+            if(fieldBehaviors == null)
+            {
+               fieldBehaviors = new ArrayList<>();
+            }
+            fieldBehaviors.add(fbff);
+         }
+      }
    }
 
 
@@ -198,4 +216,14 @@ public class QFrontendFieldMetaData
       return helpContents;
    }
 
+
+
+   /*******************************************************************************
+    ** Getter for fieldBehaviors
+    **
+    *******************************************************************************/
+   public List<FieldBehaviorForFrontend> getFieldBehaviors()
+   {
+      return fieldBehaviors;
+   }
 }

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/queues/SQSPollerSettings.java

@@ -0,0 +1,128 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2024.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.model.metadata.queues;
+
+
+/*******************************************************************************
+ ** settings that can be applied to either an SQSQueue or an SQSQueueProvider,
+ ** to control what the SQSQueuePoller does when it receives from AWS.
+ *******************************************************************************/
+public class SQSPollerSettings
+{
+   private Integer maxNumberOfMessages;
+   private Integer waitTimeSeconds;
+   private Integer maxLoops;
+
+
+
+   /*******************************************************************************
+    ** Getter for maxNumberOfMessages
+    *******************************************************************************/
+   public Integer getMaxNumberOfMessages()
+   {
+      return (this.maxNumberOfMessages);
+   }
+
+
+
+   /*******************************************************************************
+    ** Setter for maxNumberOfMessages
+    *******************************************************************************/
+   public void setMaxNumberOfMessages(Integer maxNumberOfMessages)
+   {
+      this.maxNumberOfMessages = maxNumberOfMessages;
+   }
+
+
+
+   /*******************************************************************************
+    ** Fluent setter for maxNumberOfMessages
+    *******************************************************************************/
+   public SQSPollerSettings withMaxNumberOfMessages(Integer maxNumberOfMessages)
+   {
+      this.maxNumberOfMessages = maxNumberOfMessages;
+      return (this);
+   }
+
+
+
+   /*******************************************************************************
+    ** Getter for waitTimeSeconds
+    *******************************************************************************/
+   public Integer getWaitTimeSeconds()
+   {
+      return (this.waitTimeSeconds);
+   }
+
+
+
+   /*******************************************************************************
+    ** Setter for waitTimeSeconds
+    *******************************************************************************/
+   public void setWaitTimeSeconds(Integer waitTimeSeconds)
+   {
+      this.waitTimeSeconds = waitTimeSeconds;
+   }
+
+
+
+   /*******************************************************************************
+    ** Fluent setter for waitTimeSeconds
+    *******************************************************************************/
+   public SQSPollerSettings withWaitTimeSeconds(Integer waitTimeSeconds)
+   {
+      this.waitTimeSeconds = waitTimeSeconds;
+      return (this);
+   }
+
+
+
+   /*******************************************************************************
+    ** Getter for maxLoops
+    *******************************************************************************/
+   public Integer getMaxLoops()
+   {
+      return (this.maxLoops);
+   }
+
+
+
+   /*******************************************************************************
+    ** Setter for maxLoops
+    *******************************************************************************/
+   public void setMaxLoops(Integer maxLoops)
+   {
+      this.maxLoops = maxLoops;
+   }
+
+
+
+   /*******************************************************************************
+    ** Fluent setter for maxLoops
+    *******************************************************************************/
+   public SQSPollerSettings withMaxLoops(Integer maxLoops)
+   {
+      this.maxLoops = maxLoops;
+      return (this);
+   }
+
+}

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/queues/SQSQueueMetaData.java

@@ -0,0 +1,63 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2024.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.model.metadata.queues;
+
+
+/*******************************************************************************
+ ** SQS subclass of meta-data for a specific Queue
+ *******************************************************************************/
+public class SQSQueueMetaData extends QQueueMetaData
+{
+   private SQSPollerSettings pollerSettings;
+
+
+
+   /*******************************************************************************
+    ** Getter for pollerSettings
+    *******************************************************************************/
+   public SQSPollerSettings getPollerSettings()
+   {
+      return (this.pollerSettings);
+   }
+
+
+
+   /*******************************************************************************
+    ** Setter for pollerSettings
+    *******************************************************************************/
+   public void setPollerSettings(SQSPollerSettings pollerSettings)
+   {
+      this.pollerSettings = pollerSettings;
+   }
+
+
+
+   /*******************************************************************************
+    ** Fluent setter for pollerSettings
+    *******************************************************************************/
+   public SQSQueueMetaData withPollerSettings(SQSPollerSettings pollerSettings)
+   {
+      this.pollerSettings = pollerSettings;
+      return (this);
+   }
+
+}

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/queues/SQSQueueProviderMetaData.java

@@ -36,6 +36,8 @@ public class SQSQueueProviderMetaData extends QQueueProviderMetaData
    private String region;
    private String baseURL;
 
+   private SQSPollerSettings pollerSettings;
+
 
 
    /*******************************************************************************
@@ -196,4 +198,35 @@ public class SQSQueueProviderMetaData extends QQueueProviderMetaData
       return (this);
    }
 
+
+
+   /*******************************************************************************
+    ** Getter for pollerSettings
+    *******************************************************************************/
+   public SQSPollerSettings getPollerSettings()
+   {
+      return (this.pollerSettings);
+   }
+
+
+
+   /*******************************************************************************
+    ** Setter for pollerSettings
+    *******************************************************************************/
+   public void setPollerSettings(SQSPollerSettings pollerSettings)
+   {
+      this.pollerSettings = pollerSettings;
+   }
+
+
+
+   /*******************************************************************************
+    ** Fluent setter for pollerSettings
+    *******************************************************************************/
+   public SQSQueueProviderMetaData withPollerSettings(SQSPollerSettings pollerSettings)
+   {
+      this.pollerSettings = pollerSettings;
+      return (this);
+   }
+
 }

qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/actions/queues/SQSQueuePollerTest.java

@@ -0,0 +1,87 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2024.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.actions.queues;
+
+
+import com.kingsrook.qqq.backend.core.BaseTest;
+import com.kingsrook.qqq.backend.core.model.metadata.queues.QQueueMetaData;
+import com.kingsrook.qqq.backend.core.model.metadata.queues.SQSPollerSettings;
+import com.kingsrook.qqq.backend.core.model.metadata.queues.SQSQueueMetaData;
+import com.kingsrook.qqq.backend.core.model.metadata.queues.SQSQueueProviderMetaData;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+
+/*******************************************************************************
+ ** Unit test for SQSQueuePoller 
+ *******************************************************************************/
+class SQSQueuePollerTest extends BaseTest
+{
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testGetSqsPollerSettings()
+   {
+      ///////////////////
+      // defaults only //
+      ///////////////////
+      assertSettings(Integer.MAX_VALUE, 10, 20, SQSQueuePoller.getSqsPollerSettings(null, null));
+      assertSettings(Integer.MAX_VALUE, 10, 20, SQSQueuePoller.getSqsPollerSettings(new SQSQueueProviderMetaData(), new SQSQueueMetaData()));
+      assertSettings(Integer.MAX_VALUE, 10, 20, SQSQueuePoller.getSqsPollerSettings(new SQSQueueProviderMetaData().withPollerSettings(new SQSPollerSettings()), new SQSQueueMetaData().withPollerSettings(new SQSPollerSettings())));
+
+      ///////////////////////////////////
+      // settings only in the provider //
+      ///////////////////////////////////
+      assertSettings(100, 5, 1, SQSQueuePoller.getSqsPollerSettings(
+         new SQSQueueProviderMetaData().withPollerSettings(new SQSPollerSettings().withMaxLoops(100).withMaxNumberOfMessages(5).withWaitTimeSeconds(1)),
+         new QQueueMetaData()));
+
+      ////////////////////////////////
+      // settings only in the queue //
+      ////////////////////////////////
+      assertSettings(90, 4, 2, SQSQueuePoller.getSqsPollerSettings(
+         new SQSQueueProviderMetaData(),
+         new SQSQueueMetaData().withPollerSettings(new SQSPollerSettings().withMaxLoops(90).withMaxNumberOfMessages(4).withWaitTimeSeconds(2))));
+
+      /////////////////////////////////////////
+      // mix of default, provider, and queue //
+      /////////////////////////////////////////
+      assertSettings(Integer.MAX_VALUE, 5, 2, SQSQueuePoller.getSqsPollerSettings(
+         new SQSQueueProviderMetaData().withPollerSettings(new SQSPollerSettings().withMaxNumberOfMessages(5)),
+         new SQSQueueMetaData().withPollerSettings(new SQSPollerSettings().withWaitTimeSeconds(2))));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   private void assertSettings(Integer maxLoops, Integer maxNumberOfMessages, Integer waitTimeSeconds, SQSPollerSettings sqsPollerSettings)
+   {
+      assertEquals(maxLoops, sqsPollerSettings.getMaxLoops());
+      assertEquals(maxNumberOfMessages, sqsPollerSettings.getMaxNumberOfMessages());
+      assertEquals(waitTimeSeconds, sqsPollerSettings.getWaitTimeSeconds());
+   }
+
+}

qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/actions/tables/GetActionTest.java

@@ -22,15 +22,28 @@
 package com.kingsrook.qqq.backend.core.actions.tables;
 
 
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import com.kingsrook.qqq.backend.core.BaseTest;
+import com.kingsrook.qqq.backend.core.context.QContext;
 import com.kingsrook.qqq.backend.core.exceptions.QException;
 import com.kingsrook.qqq.backend.core.model.actions.tables.get.GetInput;
 import com.kingsrook.qqq.backend.core.model.actions.tables.get.GetOutput;
+import com.kingsrook.qqq.backend.core.model.actions.tables.insert.InsertInput;
+import com.kingsrook.qqq.backend.core.model.data.QRecord;
+import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.CaseChangeBehavior;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
+import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
+import com.kingsrook.qqq.backend.core.model.metadata.tables.UniqueKey;
 import com.kingsrook.qqq.backend.core.modules.backend.implementations.memory.MemoryRecordStore;
+import com.kingsrook.qqq.backend.core.utils.TestUtils;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
 
 
 /*******************************************************************************
@@ -71,4 +84,40 @@ class GetActionTest extends BaseTest
       assertNotNull(result.getRecord());
    }
 
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testFilterFieldBehaviors() throws QException
+   {
+      /////////////////////////////////////////////////////////////////////////
+      // insert one shape with a mixed-case name, one with an all-lower name //
+      /////////////////////////////////////////////////////////////////////////
+      new InsertAction().execute(new InsertInput(TestUtils.TABLE_NAME_SHAPE).withRecords(List.of(
+         new QRecord().withValue("name", "Triangle"),
+         new QRecord().withValue("name", "square")
+      )));
+
+      ///////////////////////////////////////////////////////////////////////////
+      // now set the shape table's name field to have a to-lower-case behavior //
+      ///////////////////////////////////////////////////////////////////////////
+      QInstance      qInstance = QContext.getQInstance();
+      QTableMetaData table     = qInstance.getTable(TestUtils.TABLE_NAME_SHAPE);
+      table.withUniqueKey(new UniqueKey("name"));
+      QFieldMetaData field = table.getField("name");
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_LOWER_CASE));
+
+      ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      // confirm that if we query for "Triangle", we can't find it (because query will to-lower-case the criteria) //
+      ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      assertNull(GetAction.execute(TestUtils.TABLE_NAME_SHAPE, Map.of("name", "Triangle")));
+
+      //////////////////////////////////////////////////////////////////////////////////////////////////////////
+      // confirm that if we query for "SQUARE", we do find it (because query will to-lower-case the criteria) //
+      //////////////////////////////////////////////////////////////////////////////////////////////////////////
+      assertNotNull(GetAction.execute(TestUtils.TABLE_NAME_SHAPE, Map.of("name", "sQuArE")));
+   }
+
 }

qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/actions/tables/QueryActionTest.java

@@ -25,6 +25,7 @@ package com.kingsrook.qqq.backend.core.actions.tables;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 import com.kingsrook.qqq.backend.core.BaseTest;
 import com.kingsrook.qqq.backend.core.actions.async.AsyncRecordPipeLoop;
 import com.kingsrook.qqq.backend.core.actions.reporting.RecordPipe;
@@ -32,13 +33,18 @@ import com.kingsrook.qqq.backend.core.actions.tables.helpers.QueryStatManager;
 import com.kingsrook.qqq.backend.core.context.QContext;
 import com.kingsrook.qqq.backend.core.exceptions.QException;
 import com.kingsrook.qqq.backend.core.model.actions.tables.insert.InsertInput;
+import com.kingsrook.qqq.backend.core.model.actions.tables.query.QCriteriaOperator;
+import com.kingsrook.qqq.backend.core.model.actions.tables.query.QFilterCriteria;
 import com.kingsrook.qqq.backend.core.model.actions.tables.query.QFilterOrderBy;
 import com.kingsrook.qqq.backend.core.model.actions.tables.query.QQueryFilter;
 import com.kingsrook.qqq.backend.core.model.actions.tables.query.QueryInput;
 import com.kingsrook.qqq.backend.core.model.actions.tables.query.QueryOutput;
 import com.kingsrook.qqq.backend.core.model.data.QRecord;
 import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.CaseChangeBehavior;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.Capability;
+import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
 import com.kingsrook.qqq.backend.core.model.querystats.QueryStat;
 import com.kingsrook.qqq.backend.core.model.querystats.QueryStatMetaDataProvider;
 import com.kingsrook.qqq.backend.core.model.session.QSession;
@@ -499,4 +505,40 @@ class QueryActionTest extends BaseTest
       insertInput.setRecords(recordList);
       new InsertAction().execute(insertInput);
    }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testFilterFieldBehaviors() throws QException
+   {
+      /////////////////////////////////////////////////////////////////////////
+      // insert one shape with a mixed-case name, one with an all-lower name //
+      /////////////////////////////////////////////////////////////////////////
+      new InsertAction().execute(new InsertInput(TestUtils.TABLE_NAME_SHAPE).withRecords(List.of(
+         new QRecord().withValue("name", "Triangle"),
+         new QRecord().withValue("name", "square")
+      )));
+
+      ///////////////////////////////////////////////////////////////////////////
+      // now set the shape table's name field to have a to-lower-case behavior //
+      ///////////////////////////////////////////////////////////////////////////
+      QInstance      qInstance = QContext.getQInstance();
+      QTableMetaData table     = qInstance.getTable(TestUtils.TABLE_NAME_SHAPE);
+      QFieldMetaData field     = table.getField("name");
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_LOWER_CASE));
+
+      ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      // confirm that if we query for "Triangle", we can't find it (because query will to-lower-case the criteria) //
+      ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
+      assertEquals(0, QueryAction.execute(TestUtils.TABLE_NAME_SHAPE, new QQueryFilter(new QFilterCriteria("name", QCriteriaOperator.EQUALS, "Triangle"))).size());
+
+      //////////////////////////////////////////////////////////////////////////////////////////////////////////
+      // confirm that if we query for "SQUARE", we do find it (because query will to-lower-case the criteria) //
+      //////////////////////////////////////////////////////////////////////////////////////////////////////////
+      assertEquals(1, QueryAction.execute(TestUtils.TABLE_NAME_SHAPE, new QQueryFilter(new QFilterCriteria("name", QCriteriaOperator.EQUALS, "SqUaRe"))).size());
+   }
+
 }

qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/actions/values/ValueBehaviorApplierTest.java

@@ -27,11 +27,15 @@ import java.util.Optional;
 import java.util.Set;
 import com.kingsrook.qqq.backend.core.BaseTest;
 import com.kingsrook.qqq.backend.core.context.QContext;
+import com.kingsrook.qqq.backend.core.model.actions.tables.query.QCriteriaOperator;
+import com.kingsrook.qqq.backend.core.model.actions.tables.query.QFilterCriteria;
+import com.kingsrook.qqq.backend.core.model.actions.tables.query.QQueryFilter;
 import com.kingsrook.qqq.backend.core.model.data.QRecord;
 import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
-import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.CaseChangeBehavior;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldBehavior;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldDisplayBehavior;
+import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.fields.ValueTooLongBehavior;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
 import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
@@ -39,7 +43,9 @@ import com.kingsrook.qqq.backend.core.utils.TestUtils;
 import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
 import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
@@ -255,4 +261,64 @@ class ValueBehaviorApplierTest extends BaseTest
          }
       }
    }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testFilters()
+   {
+      QInstance      qInstance = QContext.getQInstance();
+      QTableMetaData table     = qInstance.getTable(TestUtils.TABLE_NAME_SHAPE);
+      QFieldMetaData field     = table.getField("name");
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_LOWER_CASE));
+
+      assertNull(ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, null, null));
+
+      QQueryFilter emptyFilter = new QQueryFilter();
+      assertSame(emptyFilter, ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, emptyFilter, null));
+
+      QQueryFilter hasCriteriaButNotUpdated = new QQueryFilter().withCriteria(new QFilterCriteria("id", QCriteriaOperator.EQUALS, 1));
+      assertSame(hasCriteriaButNotUpdated, ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, hasCriteriaButNotUpdated, null));
+
+      QQueryFilter hasSubFiltersButNotUpdated = new QQueryFilter().withSubFilters(List.of(new QQueryFilter().withCriteria(new QFilterCriteria("id", QCriteriaOperator.EQUALS, 1))));
+      assertSame(hasSubFiltersButNotUpdated, ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, hasSubFiltersButNotUpdated, null));
+
+      QQueryFilter hasCriteriaWithoutValues = new QQueryFilter().withSubFilters(List.of(new QQueryFilter().withCriteria(new QFilterCriteria("name", QCriteriaOperator.EQUALS))));
+      assertSame(hasCriteriaWithoutValues, ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, hasCriteriaWithoutValues, null));
+
+      QQueryFilter hasCriteriaAndSubFiltersButNotUpdated = new QQueryFilter()
+         .withCriteria(new QFilterCriteria("id", QCriteriaOperator.EQUALS, 1))
+         .withSubFilters(List.of(new QQueryFilter().withCriteria(new QFilterCriteria("id", QCriteriaOperator.EQUALS, 1))));
+      assertSame(hasCriteriaAndSubFiltersButNotUpdated, ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, hasCriteriaAndSubFiltersButNotUpdated, null));
+
+      QQueryFilter hasCriteriaToUpdate = new QQueryFilter().withCriteria(new QFilterCriteria("name", QCriteriaOperator.EQUALS, "Triangle"));
+      QQueryFilter hasCriteriaUpdated  = ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, hasCriteriaToUpdate, null);
+      assertNotSame(hasCriteriaToUpdate, hasCriteriaUpdated);
+      assertEquals("triangle", hasCriteriaUpdated.getCriteria().get(0).getValues().get(0));
+      assertEquals(hasCriteriaToUpdate.getSubFilters(), hasCriteriaUpdated.getSubFilters());
+
+      QQueryFilter hasSubFilterToUpdate = new QQueryFilter().withSubFilter(new QQueryFilter().withCriteria(new QFilterCriteria("name", QCriteriaOperator.EQUALS, "Oval")));
+      QQueryFilter hasSubFilterUpdated  = ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, hasSubFilterToUpdate, null);
+      assertNotSame(hasSubFilterToUpdate, hasSubFilterUpdated);
+      assertEquals("oval", hasSubFilterUpdated.getSubFilters().get(0).getCriteria().get(0).getValues().get(0));
+      assertEquals(hasSubFilterToUpdate.getCriteria(), hasSubFilterUpdated.getCriteria());
+
+      QQueryFilter hasCriteriaAndSubFilterToUpdate = new QQueryFilter()
+         .withCriteria(new QFilterCriteria("name", QCriteriaOperator.EQUALS, "Square"))
+         .withSubFilter(new QQueryFilter().withCriteria(new QFilterCriteria("name", QCriteriaOperator.EQUALS, "Circle")));
+      QQueryFilter hasCriteriaAndSubFilterUpdated = ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, hasCriteriaAndSubFilterToUpdate, null);
+      assertNotSame(hasCriteriaAndSubFilterToUpdate, hasCriteriaAndSubFilterUpdated);
+      assertEquals("square", hasCriteriaAndSubFilterUpdated.getCriteria().get(0).getValues().get(0));
+      assertEquals("circle", hasCriteriaAndSubFilterUpdated.getSubFilters().get(0).getCriteria().get(0).getValues().get(0));
+
+      QQueryFilter hasMultiValueCriteriaToUpdate = new QQueryFilter().withCriteria(new QFilterCriteria("name", QCriteriaOperator.EQUALS, "Triangle", "Square"));
+      QQueryFilter hasMultiValueCriteriaUpdated  = ValueBehaviorApplier.applyFieldBehaviorsToFilter(qInstance, table, hasMultiValueCriteriaToUpdate, null);
+      assertNotSame(hasMultiValueCriteriaToUpdate, hasMultiValueCriteriaUpdated);
+      assertEquals(List.of("triangle", "square"), hasMultiValueCriteriaUpdated.getCriteria().get(0).getValues());
+      assertEquals(hasMultiValueCriteriaToUpdate.getSubFilters(), hasMultiValueCriteriaUpdated.getSubFilters());
+   }
+
 }

qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/model/metadata/fields/CaseChangeBehaviorTest.java

@@ -0,0 +1,242 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2024.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.model.metadata.fields;
+
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+import com.kingsrook.qqq.backend.core.BaseTest;
+import com.kingsrook.qqq.backend.core.actions.tables.GetAction;
+import com.kingsrook.qqq.backend.core.actions.tables.InsertAction;
+import com.kingsrook.qqq.backend.core.actions.tables.QueryAction;
+import com.kingsrook.qqq.backend.core.actions.tables.UpdateAction;
+import com.kingsrook.qqq.backend.core.actions.values.ValueBehaviorApplier;
+import com.kingsrook.qqq.backend.core.context.QContext;
+import com.kingsrook.qqq.backend.core.exceptions.QException;
+import com.kingsrook.qqq.backend.core.model.actions.tables.insert.InsertInput;
+import com.kingsrook.qqq.backend.core.model.actions.tables.update.UpdateInput;
+import com.kingsrook.qqq.backend.core.model.data.QRecord;
+import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
+import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
+import com.kingsrook.qqq.backend.core.utils.TestUtils;
+import com.kingsrook.qqq.backend.core.utils.collections.ListBuilder;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+
+/*******************************************************************************
+ ** Unit test for CaseChangeBehavior 
+ *******************************************************************************/
+class CaseChangeBehaviorTest extends BaseTest
+{
+   public static final String FIELD = "firstName" ;
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testNone()
+   {
+      assertNull(applyToRecord(CaseChangeBehavior.NONE, new QRecord(), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+      assertNull(applyToRecord(CaseChangeBehavior.NONE, new QRecord().withValue(FIELD, null), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+      assertEquals("John", applyToRecord(CaseChangeBehavior.NONE, new QRecord().withValue(FIELD, "John"), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+
+      assertEquals(ListBuilder.of("John", null, "Jane"), applyToRecords(CaseChangeBehavior.NONE, List.of(
+            new QRecord().withValue(FIELD, "John"),
+            new QRecord(),
+            new QRecord().withValue(FIELD, "Jane")),
+         ValueBehaviorApplier.Action.INSERT).stream().map(r -> r.getValueString(FIELD)).toList());
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testToUpperCase()
+   {
+      assertNull(applyToRecord(CaseChangeBehavior.TO_UPPER_CASE, new QRecord(), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+      assertNull(applyToRecord(CaseChangeBehavior.TO_UPPER_CASE, new QRecord().withValue(FIELD, null), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+      assertEquals("JOHN", applyToRecord(CaseChangeBehavior.TO_UPPER_CASE, new QRecord().withValue(FIELD, "John"), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+
+      assertEquals(ListBuilder.of("JOHN", null, "JANE"), applyToRecords(CaseChangeBehavior.TO_UPPER_CASE, List.of(
+            new QRecord().withValue(FIELD, "John"),
+            new QRecord(),
+            new QRecord().withValue(FIELD, "Jane")),
+         ValueBehaviorApplier.Action.INSERT).stream().map(r -> r.getValueString(FIELD)).toList());
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testToLowerCase()
+   {
+      assertNull(applyToRecord(CaseChangeBehavior.TO_LOWER_CASE, new QRecord(), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+      assertNull(applyToRecord(CaseChangeBehavior.TO_LOWER_CASE, new QRecord().withValue(FIELD, null), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+      assertEquals("john", applyToRecord(CaseChangeBehavior.TO_LOWER_CASE, new QRecord().withValue(FIELD, "John"), ValueBehaviorApplier.Action.INSERT).getValue(FIELD));
+
+      assertEquals(ListBuilder.of("john", null, "jane"), applyToRecords(CaseChangeBehavior.TO_LOWER_CASE, List.of(
+            new QRecord().withValue(FIELD, "John"),
+            new QRecord(),
+            new QRecord().withValue(FIELD, "Jane")),
+         ValueBehaviorApplier.Action.INSERT).stream().map(r -> r.getValueString(FIELD)).toList());
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   private QRecord applyToRecord(CaseChangeBehavior behavior, QRecord record, ValueBehaviorApplier.Action action)
+   {
+      return (applyToRecords(behavior, List.of(record), action).get(0));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   private List<QRecord> applyToRecords(CaseChangeBehavior behavior, List<QRecord> records, ValueBehaviorApplier.Action action)
+   {
+      QTableMetaData table = QContext.getQInstance().getTable(TestUtils.TABLE_NAME_PERSON_MEMORY);
+      behavior.apply(action, records, QContext.getQInstance(), table, table.getField(FIELD));
+      return (records);
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testReads() throws QException
+   {
+      TestUtils.insertDefaultShapes(QContext.getQInstance());
+
+      List<QRecord> records = QueryAction.execute(TestUtils.TABLE_NAME_SHAPE, null);
+      assertEquals(Set.of("Triangle", "Square", "Circle"), records.stream().map(r -> r.getValueString("name")).collect(Collectors.toSet()));
+
+      QFieldMetaData field = QContext.getQInstance().getTable(TestUtils.TABLE_NAME_SHAPE).getField("name");
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_UPPER_CASE));
+
+      records = QueryAction.execute(TestUtils.TABLE_NAME_SHAPE, null);
+      assertEquals(Set.of("TRIANGLE", "SQUARE", "CIRCLE"), records.stream().map(r -> r.getValueString("name")).collect(Collectors.toSet()));
+
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_LOWER_CASE));
+      assertEquals("triangle", GetAction.execute(TestUtils.TABLE_NAME_SHAPE, 1).getValueString("name"));
+
+      field.setBehaviors(Set.of(CaseChangeBehavior.NONE));
+      assertEquals("Triangle", GetAction.execute(TestUtils.TABLE_NAME_SHAPE, 1).getValueString("name"));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testWrites() throws QException
+   {
+      Integer id = 100;
+
+      QFieldMetaData field = QContext.getQInstance().getTable(TestUtils.TABLE_NAME_SHAPE).getField("name");
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_UPPER_CASE));
+      new InsertAction().execute(new InsertInput(TestUtils.TABLE_NAME_SHAPE).withRecord(new QRecord().withValue("id", id).withValue("name", "Octagon")));
+
+      //////////////////////////////////////////////////////////////////////////////////
+      // turn off the to-upper-case behavior, so we'll see what was actually inserted //
+      //////////////////////////////////////////////////////////////////////////////////
+      field.setBehaviors(Collections.emptySet());
+      assertEquals("OCTAGON", GetAction.execute(TestUtils.TABLE_NAME_SHAPE, id).getValueString("name"));
+
+      ////////////////////////////////////////////
+      // change to toLowerCase and do an update //
+      ////////////////////////////////////////////
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_LOWER_CASE));
+      new UpdateAction().execute(new UpdateInput(TestUtils.TABLE_NAME_SHAPE).withRecord(new QRecord().withValue("id", id).withValue("name", "Octagon")));
+
+      ////////////////////////////////////////////////////////////////////////////////////
+      // turn off the to-lower-case behavior, so we'll see what was actually udpated to //
+      ////////////////////////////////////////////////////////////////////////////////////
+      field.setBehaviors(Collections.emptySet());
+      assertEquals("octagon", GetAction.execute(TestUtils.TABLE_NAME_SHAPE, id).getValueString("name"));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testFilter()
+   {
+      QInstance      qInstance = QContext.getQInstance();
+      QTableMetaData table     = qInstance.getTable(TestUtils.TABLE_NAME_SHAPE);
+      QFieldMetaData field     = table.getField("name");
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_UPPER_CASE));
+      assertEquals("SQUARE", CaseChangeBehavior.TO_UPPER_CASE.applyToFilterCriteriaValue("square", qInstance, table, field));
+
+      field.setBehaviors(Set.of(CaseChangeBehavior.TO_LOWER_CASE));
+      assertEquals("triangle", CaseChangeBehavior.TO_LOWER_CASE.applyToFilterCriteriaValue("Triangle", qInstance, table, field));
+
+      field.setBehaviors(Set.of(CaseChangeBehavior.NONE));
+      assertEquals("Circle", CaseChangeBehavior.NONE.applyToFilterCriteriaValue("Circle", qInstance, table, field));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testValidation()
+   {
+      QTableMetaData table = QContext.getQInstance().getTable(TestUtils.TABLE_NAME_SHAPE);
+
+      ///////////////////////////////////////////
+      // should be no errors on a string field //
+      ///////////////////////////////////////////
+      assertTrue(CaseChangeBehavior.TO_UPPER_CASE.validateBehaviorConfiguration(table, table.getField("name")).isEmpty());
+
+      //////////////////////////////////////////
+      // should be an error on a number field //
+      //////////////////////////////////////////
+      assertEquals(1, CaseChangeBehavior.TO_LOWER_CASE.validateBehaviorConfiguration(table, table.getField("id")).size());
+
+      /////////////////////////////////////////
+      // NONE should be allowed on any field //
+      /////////////////////////////////////////
+      assertTrue(CaseChangeBehavior.NONE.validateBehaviorConfiguration(table, table.getField("id")).isEmpty());
+   }
+
+}

qqq-middleware-api/src/main/java/com/kingsrook/qqq/api/actions/GetTableApiFieldsAction.java

@@ -25,9 +25,11 @@ package com.kingsrook.qqq.api.actions;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.stream.Collectors;
+import java.util.Set;
 import com.kingsrook.qqq.api.model.APIVersion;
 import com.kingsrook.qqq.api.model.APIVersionRange;
 import com.kingsrook.qqq.api.model.actions.GetTableApiFieldsInput;
@@ -76,7 +78,27 @@ public class GetTableApiFieldsAction extends AbstractQActionFunction<GetTableApi
    {
       if(!fieldMapCache.containsKey(apiNameVersionAndTableName))
       {
-         Map<String, QFieldMetaData> map = getTableApiFieldList(apiNameVersionAndTableName).stream().collect(Collectors.toMap(f -> (ApiFieldMetaData.getEffectiveApiFieldName(apiNameVersionAndTableName.apiName(), f)), f -> f));
+         List<QFieldMetaData>        tableApiFieldList   = getTableApiFieldList(apiNameVersionAndTableName);
+         Map<String, QFieldMetaData> map                 = new LinkedHashMap<>();
+         Set<String>                 duplicateFieldNames = new HashSet<>();
+         for(QFieldMetaData qFieldMetaData : tableApiFieldList)
+         {
+            String effectiveApiFieldName = ApiFieldMetaData.getEffectiveApiFieldName(apiNameVersionAndTableName.apiName(), qFieldMetaData);
+            if(map.containsKey(effectiveApiFieldName))
+            {
+               duplicateFieldNames.add(effectiveApiFieldName);
+            }
+            else
+            {
+               map.put(effectiveApiFieldName, qFieldMetaData);
+            }
+         }
+
+         if(!duplicateFieldNames.isEmpty())
+         {
+            throw (new QException("The field names [" + duplicateFieldNames + "] appear in this api table more than once.  (Do you need to exclude a field that is still in the table, but is also marked as removed?)"));
+         }
+
          fieldMapCache.put(apiNameVersionAndTableName, map);
       }
 

qqq-middleware-api/src/main/java/com/kingsrook/qqq/api/model/metadata/tables/ApiTableMetaDataContainer.java

@@ -25,6 +25,14 @@ package com.kingsrook.qqq.api.model.metadata.tables;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import com.kingsrook.qqq.api.ApiSupplementType;
+import com.kingsrook.qqq.api.actions.GetTableApiFieldsAction;
+import com.kingsrook.qqq.api.model.APIVersion;
+import com.kingsrook.qqq.api.model.metadata.ApiInstanceMetaData;
+import com.kingsrook.qqq.api.model.metadata.ApiInstanceMetaDataContainer;
+import com.kingsrook.qqq.backend.core.context.CapturedContext;
+import com.kingsrook.qqq.backend.core.context.QContext;
+import com.kingsrook.qqq.backend.core.instances.QInstanceValidator;
+import com.kingsrook.qqq.backend.core.logging.QLogger;
 import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QSupplementalTableMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
@@ -36,6 +44,8 @@ import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
  *******************************************************************************/
 public class ApiTableMetaDataContainer extends QSupplementalTableMetaData
 {
+   private static final QLogger LOG = QLogger.getLogger(ApiTableMetaDataContainer.class);
+
    private Map<String, ApiTableMetaData> apis;
 
 
@@ -172,4 +182,51 @@ public class ApiTableMetaDataContainer extends QSupplementalTableMetaData
       return (this);
    }
 
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Override
+   public void validate(QInstance qInstance, QTableMetaData tableMetaData, QInstanceValidator qInstanceValidator)
+   {
+      super.validate(qInstance, tableMetaData, qInstanceValidator);
+
+      ////////////////////////////////////////
+      // iterate over apis this table is in //
+      ////////////////////////////////////////
+      for(String apiName : CollectionUtils.nonNullMap(apis).keySet())
+      {
+         ApiInstanceMetaData apiInstanceMetaData = ApiInstanceMetaDataContainer.of(qInstance).getApis().get(apiName);
+
+         //////////////////////////////////////////////////
+         // iterate over supported versions for this api //
+         //////////////////////////////////////////////////
+         for(APIVersion version : apiInstanceMetaData.getSupportedVersions())
+         {
+            CapturedContext capturedContext = QContext.capture();
+            try
+            {
+               QContext.setQInstance(qInstance);
+
+               ///////////////////////////////////////////////////////////////////////////////////////////////////
+               // try to get the field-map for this table.  note that this will (implicitly) throw an exception //
+               // if we have the same field name more than once, which can happen if a field is both in the     //
+               // removed-list and the table's normal field list.                                               //
+               ///////////////////////////////////////////////////////////////////////////////////////////////////
+               GetTableApiFieldsAction.getTableApiFieldMap(new GetTableApiFieldsAction.ApiNameVersionAndTableName(apiName, version.toString(), tableMetaData.getName()));
+            }
+            catch(Exception e)
+            {
+               String message = "Error validating ApiTableMetaData for table: " + tableMetaData.getName() + ", api: " + apiName + ", version: " + version;
+               LOG.warn(message, e);
+               qInstanceValidator.getErrors().add(message + ": " + e.getMessage());
+            }
+            finally
+            {
+               QContext.init(capturedContext);
+            }
+         }
+      }
+   }
 }