org.apache.derby.impl.sql.execute

Class CreateConstraintConstantAction

java.lang.Object

org.apache.derby.impl.sql.execute.ConstraintConstantAction

org.apache.derby.impl.sql.execute.CreateConstraintConstantAction

All Implemented Interfaces:

ConstantAction

public class CreateConstraintConstantAction
extends ConstraintConstantAction

This class describes actions that are ALWAYS performed for a constraint creation at Execution time.

Field Summary

Fields inherited from interface org.apache.derby.iapi.sql.execute.ConstantAction

WHEN_MATCHED_THEN_DELETE, WHEN_MATCHED_THEN_UPDATE, WHEN_NOT_MATCHED_THEN_INSERT

Method Summary

Modifier and Type	Method and Description
void	executeConstantAction(Activation activation) This is the guts of the Execution-time logic for CREATE CONSTRAINT.
java.lang.String	toString()

Methods inherited from class org.apache.derby.impl.sql.execute.ConstraintConstantAction

getConstraintId, getConstraintName, getConstraintType, getIndexAction

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

executeConstantAction

public void executeConstantAction(Activation activation)
                           throws StandardException

This is the guts of the Execution-time logic for CREATE CONSTRAINT.

A constraint is represented as:

• ConstraintDescriptor.

If a backing index is required then the index will be created through an CreateIndexConstantAction setup by the compiler.
Dependencies are created as:

• ConstraintDescriptor depends on all the providers collected at compile time and passed into the constructor.
• For a FOREIGN KEY constraint ConstraintDescriptor depends on the ConstraintDescriptor for the referenced constraints and the privileges required to create the constraint.

Parameters:

activation - The execution environment for this constant action.

Throws:

StandardException - Thrown on failure

See Also:

ConstraintDescriptor, CreateIndexConstantAction, ConstantAction.executeConstantAction(org.apache.derby.iapi.sql.Activation)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object