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

java.lang.Object
  org.apache.derby.impl.sql.execute.GenericConstantAction
      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

Author:

Jerry Brenner

Field Summary

private ClassFactory	cf
java.lang.String[]	columnNames
java.lang.String	constraintText
private boolean	enabled
private ConstraintInfo	otherConstraintInfo
private ProviderInfo[]	providerInfo

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

constraintName, constraintType, indexAction, schemaId, schemaName, tableId, tableName

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

RUNTIMESTATISTICS, STATISTICSTIMING

Constructor Summary

(package private)

CreateConstraintConstantAction(java.lang.String constraintName, int constraintType, 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

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.
java.lang.String[]	getColumnNames() Get the names of the columns touched by this constraint.
java.lang.String	getConstraintText() Get the text defining this constraint.
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, modifiesTableId, validateConstraint, validateFKConstraint

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

constructToString, getAndCheckSchemaDescriptor, getSchemaDescriptorForCreate, lockTableForDDL, readExternal, upToDate, writeExternal

Methods inherited from class java.lang.Object

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

Field Detail

columnNames

public java.lang.String[] columnNames

constraintText

public 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,
                               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.

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.

Parameters:

activation - The execution environment for this constant action.

Throws:

StandardException - Thrown on failure

See Also:

ConstantAction.executeConstantAction(org.apache.derby.iapi.sql.Activation)

isForeignKeyConstraint

public 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

getColumnNames

public java.lang.String[] getColumnNames()

Get the names of the columns touched by this constraint.

Returns:

the array of touched column names.

getConstraintText

public java.lang.String getConstraintText()

Get the text defining this constraint.

Returns:

constraint text

toString

public java.lang.String toString()