org.apache.derby.impl.sql.execute

Class CreateConstraintConstantAction

java.lang.Object

org.apache.derby.impl.sql.execute.DDLConstantAction

org.apache.derby.impl.sql.execute.DDLSingleTableConstantAction

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.

Version:

0.1

Field Summary

Fields

Modifier and Type	Field and Description
private ClassFactory	cf
private java.lang.String[]	columnNames
private java.lang.String	constraintText
private boolean	enabled
private boolean	forCreateTable
private ConstraintInfo	otherConstraintInfo
private ProviderInfo[]	providerInfo

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

constraintName, constraintType, indexAction, schemaId, schemaName, tableName

Fields inherited from class org.apache.derby.impl.sql.execute.DDLSingleTableConstantAction

tableId

Constructor Summary

Constructors

Constructor and Description
CreateConstraintConstantAction(java.lang.String constraintName, int constraintType, boolean forCreateTable, java.lang.String tableName, UUID tableId, java.lang.String schemaName, java.lang.String[] columnNames, IndexConstantAction indexAction, java.lang.String constraintText, boolean enabled, ConstraintInfo otherConstraint, ProviderInfo[] providerInfo) Make one of these puppies.

Method Summary

Modifier and Type	Method and Description
void	executeConstantAction(Activation activation) This is the guts of the Execution-time logic for CREATE CONSTRAINT.
private int[]	genColumnPositions(TableDescriptor td, boolean columnsMustBeOrderable) Generate an array of column positions for the column list in the constraint.
(package private) java.lang.String	getConstraintText() Get the text defining this constraint.
(package private) boolean	isForeignKeyConstraint() Is the constant action for a foreign key
java.lang.String	toString()

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

getConstraintName, getConstraintType, getIndexAction, validateConstraint, validateFKConstraint

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

dropConglomerate, dropConglomerate, dropConstraint, dropConstraint, dropConstraint, executeConglomReplacement, getConglomReplacementAction, recreateUniqueConstraintBackingIndexAsUniqueWhenNotNull

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

addColumnDependencies, adjustUDTDependencies, adjustUDTDependencies, constructToString, getAndCheckSchemaDescriptor, getSchemaDescriptorForCreate, lockTableForDDL, storeConstraintDependenciesOnPrivileges, storeViewTriggerDependenciesOnPrivileges

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

forCreateTable

private final boolean forCreateTable

columnNames

private java.lang.String[] columnNames

constraintText

private java.lang.String constraintText

otherConstraintInfo

private ConstraintInfo otherConstraintInfo

cf

private ClassFactory cf

enabled

private boolean enabled

providerInfo

private ProviderInfo[] providerInfo

Constructor Detail

CreateConstraintConstantAction

CreateConstraintConstantAction(java.lang.String constraintName,
                               int constraintType,
                               boolean forCreateTable,
                               java.lang.String tableName,
                               UUID tableId,
                               java.lang.String schemaName,
                               java.lang.String[] columnNames,
                               IndexConstantAction indexAction,
                               java.lang.String constraintText,
                               boolean enabled,
                               ConstraintInfo otherConstraint,
                               ProviderInfo[] providerInfo)

Make one of these puppies.

Parameters:

constraintName - Constraint name.

constraintType - Constraint type.

forCreateTable - Constraint is being added for a CREATE TABLE

tableName - Table name.

tableId - UUID of table.

schemaName - the schema that table and constraint lives in.

columnNames - String[] for column names

indexAction - IndexConstantAction for constraint (if necessary)

constraintText - Text for check constraint RESOLVE - the next parameter should go away once we use UUIDs (Generated constraint names will be based off of uuids)

enabled - Should the constraint be created as enabled (enabled == true), or disabled (enabled == false).

otherConstraint - information about the constraint that this references

providerInfo - Information on all the Providers

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)

isForeignKeyConstraint

boolean isForeignKeyConstraint()

Is the constant action for a foreign key

Returns:

true/false

genColumnPositions

private int[] genColumnPositions(TableDescriptor td,
                                 boolean columnsMustBeOrderable)
                          throws StandardException

Generate an array of column positions for the column list in the constraint.

Parameters:

td - The TableDescriptor for the table in question

columnsMustBeOrderable - true for primaryKey and unique constraints

Returns:

int[] The column positions.

Throws:

StandardException

getConstraintText

java.lang.String getConstraintText()

Get the text defining this constraint.

Returns:

constraint text

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object