org.apache.ddlutils.platform.db2

Class Db2Builder

java.lang.Object

org.apache.ddlutils.platform.SqlBuilder

org.apache.ddlutils.platform.db2.Db2Builder

Direct Known Subclasses:

Db2v8Builder

public class Db2Builder
extends SqlBuilder

The SQL Builder for DB2.

Version:

$Revision: 504811 $

Field Summary

Fields inherited from class org.apache.ddlutils.platform.SqlBuilder

_log, SIZE_PLACEHOLDER

Constructor Summary

Constructors

Constructor and Description
Db2Builder(Platform platform) Creates a new builder instance.

Method Summary

Methods

Modifier and Type	Method and Description
protected String	getNativeDefaultValue(Column column) Returns the native default value for the column.
String	getSelectLastIdentityValues(Table table) Generates the SQL for querying the id that was created in the last insertion operation.
protected void	processChange(Database currentModel, Database desiredModel, AddColumnChange change) Processes the addition of a column to a table.
protected void	processChange(Database currentModel, Database desiredModel, PrimaryKeyChange change) Processes the change of the primary key of a table.
protected void	processChange(Database currentModel, Database desiredModel, RemoveColumnChange change) Processes the removal of a column from a table.
protected void	processChange(Database currentModel, Database desiredModel, RemovePrimaryKeyChange change) Processes the removal of a primary key from a table.
protected void	processTableStructureChanges(Database currentModel, Database desiredModel, Table sourceTable, Table targetTable, Map parameters, List changes) Allows database-specific implementations to handle changes in a database specific manner.
protected void	writeCastExpression(Column sourceColumn, Column targetColumn) Writes a cast expression that converts the value of the source column to the data type of the target column.
protected void	writeColumnAutoIncrementStmt(Table table, Column column) Prints that the column is an auto increment column.
void	writeExternalIndexDropStmt(Table table, Index index) Generates the statement to drop a non-embedded index from the database.

Methods inherited from class org.apache.ddlutils.platform.SqlBuilder

addEscapedCharSequence, alterDatabase, applyForSelectedChanges, areEqual, columnsDiffer, createExternalForeignKeys, createExternalForeignKeys, createTable, createTable, createTables, createTables, createTables, createTemporaryTable, createUniqueIdentifier, dropExternalForeignKeys, dropTable, dropTable, dropTables, dropTemporaryTable, escapeStringValue, findCorrespondingForeignKey, getBareNativeType, getColumnName, getConstraintName, getDefaultValueHelper, getDeleteSql, getDelimitedIdentifier, getForeignKeyName, getIndent, getIndexName, getInsertSql, getMaxColumnNameLength, getMaxConstraintNameLength, getMaxForeignKeyNameLength, getMaxTableNameLength, getNativeType, getPlatform, getPlatformInfo, getRealTargetTableFor, getSqlType, getTableName, getTemporaryTableFor, getUpdateSql, getValueAsString, getValueDateFormat, getValueLocale, getValueNumberFormat, getValueTimeFormat, getWriter, isValidDefaultValue, print, printComment, printDefaultValue, printEndOfStatement, printIdentifier, printIndent, println, println, printlnIdentifier, printStartOfEmbeddedStatement, processChange, processChange, processChange, processChange, processChange, processChange, processChange, processChange, processChanges, processTableStructureChanges, processTableStructureChanges, setIndent, setValueDateFormat, setValueLocale, setValueNumberFormat, setValueTimeFormat, setWriter, shortenName, shouldGeneratePrimaryKeys, writeColumn, writeColumnDefaultValue, writeColumnDefaultValueStmt, writeColumnNotNullableStmt, writeColumnNullableStmt, writeColumns, writeCopyDataStatement, writeEmbeddedForeignKeysStmt, writeEmbeddedIndexCreateStmt, writeEmbeddedIndicesStmt, writeEmbeddedPrimaryKeysStmt, writeExternalForeignKeyCreateStmt, writeExternalForeignKeyDropStmt, writeExternalIndexCreateStmt, writeExternalIndicesCreateStmt, writeExternalPrimaryKeysCreateStmt, writeForeignReferences, writeLocalReferences, writePrimaryKeyStmt, writeTableAlterStmt, writeTableComment, writeTableCreationStmt, writeTableCreationStmtEnding

Methods inherited from class java.lang.Object

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

Constructor Detail

Db2Builder

public Db2Builder(Platform platform)

Creates a new builder instance.

Parameters:

platform - The plaftform this builder belongs to

Method Detail

getNativeDefaultValue

protected String getNativeDefaultValue(Column column)

Returns the native default value for the column.

Overrides:

getNativeDefaultValue in class SqlBuilder

Parameters:

column - The column

Returns:

The native default value

writeColumnAutoIncrementStmt

protected void writeColumnAutoIncrementStmt(Table table,
                                Column column)
                                     throws IOException

Prints that the column is an auto increment column.

Overrides:

writeColumnAutoIncrementStmt in class SqlBuilder

Parameters:

table - The table

column - The column

Throws:

IOException

getSelectLastIdentityValues

public String getSelectLastIdentityValues(Table table)

Generates the SQL for querying the id that was created in the last insertion operation. This is obviously only useful for pk fields that are auto-incrementing. A database that does not support this, will return null.

Overrides:

getSelectLastIdentityValues in class SqlBuilder

Parameters:

table - The table

Returns:

The sql, or null if the database does not support this

writeExternalIndexDropStmt

public void writeExternalIndexDropStmt(Table table,
                              Index index)
                                throws IOException

Generates the statement to drop a non-embedded index from the database.

Overrides:

writeExternalIndexDropStmt in class SqlBuilder

Parameters:

table - The table the index is on

index - The index to drop

Throws:

IOException

writeCastExpression

protected void writeCastExpression(Column sourceColumn,
                       Column targetColumn)
                            throws IOException

Writes a cast expression that converts the value of the source column to the data type of the target column. Per default, simply the name of the source column is written thereby assuming that any casts happen implicitly.

Overrides:

writeCastExpression in class SqlBuilder

Parameters:

sourceColumn - The source column

targetColumn - The target column

Throws:

IOException

processTableStructureChanges

protected void processTableStructureChanges(Database currentModel,
                                Database desiredModel,
                                Table sourceTable,
                                Table targetTable,
                                Map parameters,
                                List changes)
                                     throws IOException

Allows database-specific implementations to handle changes in a database specific manner. Any handled change should be applied to the given current model (which is a copy of the real original model) and be removed from the list of changes.
In the default implementation, all AddPrimaryKeyChange changes are applied via an ALTER TABLE ADD CONSTRAINT statement.

Overrides:

processTableStructureChanges in class SqlBuilder

Parameters:

currentModel - The current database schema

desiredModel - The desired database schema

sourceTable - The original table

targetTable - The desired table

parameters - The creation parameters for the table

changes - The change objects for the target table

Throws:

IOException

processChange

protected void processChange(Database currentModel,
                 Database desiredModel,
                 AddColumnChange change)
                      throws IOException

Processes the addition of a column to a table.

Parameters:

currentModel - The current database schema

desiredModel - The desired database schema

change - The change object

Throws:

IOException

processChange

protected void processChange(Database currentModel,
                 Database desiredModel,
                 RemoveColumnChange change)
                      throws IOException

Processes the removal of a column from a table.

Parameters:

currentModel - The current database schema

desiredModel - The desired database schema

change - The change object

Throws:

IOException

processChange

protected void processChange(Database currentModel,
                 Database desiredModel,
                 RemovePrimaryKeyChange change)
                      throws IOException

Processes the removal of a primary key from a table.

Parameters:

currentModel - The current database schema

desiredModel - The desired database schema

change - The change object

Throws:

IOException

processChange

protected void processChange(Database currentModel,
                 Database desiredModel,
                 PrimaryKeyChange change)
                      throws IOException

Processes the change of the primary key of a table.

Parameters:

currentModel - The current database schema

desiredModel - The desired database schema

change - The change object

Throws:

IOException