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

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

All Implemented Interfaces:

org.apache.derby.iapi.sql.execute.ConstantAction

Direct Known Subclasses:

CreateConstraintConstantAction, DropConstraintConstantAction

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public abstract class ConstraintConstantAction

extends DDLSingleTableConstantAction

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

Version:

0.1

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Field Summary
protected  java.lang.String	constraintName
protected  int	constraintType
protected  IndexConstantAction	indexAction
protected  org.apache.derby.catalog.UUID	schemaId
protected  java.lang.String	schemaName
protected  org.apache.derby.catalog.UUID	tableId
protected  java.lang.String	tableName

 

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

RUNTIMESTATISTICS, STATISTICSTIMING

 

Constructor Summary
(package private)	ConstraintConstantAction(java.lang.String constraintName, int constraintType, java.lang.String tableName, org.apache.derby.catalog.UUID tableId, java.lang.String schemaName, IndexConstantAction indexAction)           Make one of these puppies.

 

Method Summary
java.lang.String	getConstraintName()           Get the constraint name
int	getConstraintType()           Get the constraint type.
IndexConstantAction	getIndexAction()           Get the associated index constant action.
boolean	modifiesTableId(org.apache.derby.catalog.UUID tableId)           Does this constant action modify the passed in table uuid? By modify we mean add or drop things tied to this table (e.g.
(package private) static boolean	validateConstraint(java.lang.String constraintName, java.lang.String constraintText, org.apache.derby.iapi.sql.dictionary.TableDescriptor td, org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc, boolean isCheckConstraint)           Evaluate a check constraint or not null column constraint.
(package private) static void	validateFKConstraint(org.apache.derby.iapi.store.access.TransactionController tc, org.apache.derby.iapi.sql.dictionary.DataDictionary dd, org.apache.derby.iapi.sql.dictionary.ForeignKeyConstraintDescriptor fk, org.apache.derby.iapi.sql.dictionary.ReferencedKeyConstraintDescriptor refcd, org.apache.derby.iapi.sql.execute.ExecRow indexTemplateRow)           Make sure that the foreign key constraint is valid with the existing data in the target table.

 

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, toString, wait, wait, wait

 

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

executeConstantAction

 

Field Detail

constraintName

protected java.lang.String constraintName

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constraintType

protected int constraintType

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tableName

protected java.lang.String tableName

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schemaName

protected java.lang.String schemaName

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schemaId

protected org.apache.derby.catalog.UUID schemaId

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indexAction

protected IndexConstantAction indexAction

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tableId

protected org.apache.derby.catalog.UUID tableId

Constructor Detail

ConstraintConstantAction

ConstraintConstantAction(java.lang.String constraintName,
                         int constraintType,
                         java.lang.String tableName,
                         org.apache.derby.catalog.UUID tableId,
                         java.lang.String schemaName,
                         IndexConstantAction indexAction)

Make one of these puppies.

Method Detail

getConstraintType

public int getConstraintType()

Get the constraint type.

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getConstraintName

public java.lang.String getConstraintName()

Get the constraint name

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getIndexAction

public IndexConstantAction getIndexAction()

Get the associated index constant action.

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validateFKConstraint

static void validateFKConstraint(org.apache.derby.iapi.store.access.TransactionController tc,
                                 org.apache.derby.iapi.sql.dictionary.DataDictionary dd,
                                 org.apache.derby.iapi.sql.dictionary.ForeignKeyConstraintDescriptor fk,
                                 org.apache.derby.iapi.sql.dictionary.ReferencedKeyConstraintDescriptor refcd,
                                 org.apache.derby.iapi.sql.execute.ExecRow indexTemplateRow)
                          throws org.apache.derby.iapi.error.StandardException

Make sure that the foreign key constraint is valid with the existing data in the target table. Open the table, if there aren't any rows, ok. If there are rows, open a scan on the referenced key with table locking at level 2. Pass in the scans to the BulkRIChecker. If any rows fail, barf.

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validateConstraint

static boolean validateConstraint(java.lang.String constraintName,
                                  java.lang.String constraintText,
                                  org.apache.derby.iapi.sql.dictionary.TableDescriptor td,
                                  org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc,
                                  boolean isCheckConstraint)
                           throws org.apache.derby.iapi.error.StandardException

Evaluate a check constraint or not null column constraint. Generate a query of the form SELECT COUNT(*) FROM t where NOT() and run it by compiling and executing it. Will work ok if the table is empty and query returns null.

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modifiesTableId

public boolean modifiesTableId(org.apache.derby.catalog.UUID tableId)

Does this constant action modify the passed in table uuid? By modify we mean add or drop things tied to this table (e.g. index, trigger, constraint). Things like views or spses that reference this table don't count.

Specified by:

modifiesTableId in interface org.apache.derby.iapi.sql.execute.ConstantAction

Overrides:

modifiesTableId in class DDLConstantAction

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> sql >> [ execute overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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