smiklosovic commented on code in PR #3994:
URL: https://github.com/apache/cassandra/pull/3994#discussion_r2003589668


##########
src/java/org/apache/cassandra/cql3/constraints/ScalarColumnConstraint.java:
##########
@@ -130,6 +125,15 @@ protected void internalEvaluate(AbstractType<?> valueType, 
ByteBuffer columnValu
     public void validate(ColumnMetadata columnMetadata) throws 
InvalidConstraintDefinitionException
     {
         validateTypes(columnMetadata);
+
+        try
+        {
+            value = columnMetadata.type.fromString(term);
+        }
+        catch (Throwable t)
+        {
+            throw new ConstraintViolationException("Cannot parse constraint 
value from '" + term + "' for column '" + columnName + '\'');

Review Comment:
   we should test something like this:
   
   ````
   cassandra@cqlsh> ALTER TABLE ks.my_times ALTER col CHECK col > '-1:00:00';
   ... [Invalid query] message="Cannot parse constraint value from '-1:00:00' 
for column 'col'"
   
   ````



##########
src/java/org/apache/cassandra/cql3/constraints/ScalarColumnConstraint.java:
##########
@@ -130,6 +125,15 @@ protected void internalEvaluate(AbstractType<?> valueType, 
ByteBuffer columnValu
     public void validate(ColumnMetadata columnMetadata) throws 
InvalidConstraintDefinitionException
     {
         validateTypes(columnMetadata);
+
+        try
+        {
+            value = columnMetadata.type.fromString(term);
+        }
+        catch (Throwable t)
+        {
+            throw new ConstraintViolationException("Cannot parse constraint 
value from '" + term + "' for column '" + columnName + '\'');

Review Comment:
   @bbotella 



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