org.apache.ddlutils.platform.sybase

Class SybaseBuilder

java.lang.Object

org.apache.ddlutils.platform.SqlBuilder

org.apache.ddlutils.platform.sybase.SybaseBuilder

public class SybaseBuilder
extends SqlBuilder

The SQL Builder for Sybase.

Version:

$Revision: 532976 $

Field Summary

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

_log, SIZE_PLACEHOLDER

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
void	createTable(Database database, Table table, Map parameters) Outputs the DDL to create the table along with any non-external constraints as well as with external primary keys and indices (but not foreign keys).
void	dropExternalForeignKeys(Table table) Creates external foreignkey drop statements.
void	dropTable(Table table) Outputs the DDL to drop the table.
protected String	getDisableIdentityOverrideSql(Table table) Returns the SQL to disable identity override mode.
protected String	getEnableIdentityOverrideSql(Table table) Returns the SQL to enable identity override mode.
protected String	getNativeDefaultValue(Column column) Returns the native default value for the column.
protected String	getQuotationOnStatement() Returns the statement that turns on the ability to write delimited identifiers.
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, ColumnDefaultValueChange change) Processes the change of the default value of a column.
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	processChanges(Database currentModel, Database desiredModel, List changes, CreationParameters params) Processes the changes.
protected void	processColumnChange(Table sourceTable, Table targetTable, Column sourceColumn, Column targetColumn) Processes a change to a column.
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	writeColumn(Table table, Column column) Outputs the DDL for the specified column.
protected void	writeCopyDataStatement(Table sourceTable, Table targetTable) Writes a statement that copies the data from the source to the target table.
protected void	writeExternalForeignKeyDropStmt(Table table, ForeignKey foreignKey) Generates the statement to drop a foreignkey constraint from the database using an alter table statement.
void	writeExternalIndexDropStmt(Table table, Index index) Generates the statement to drop a non-embedded index from the database.
protected void	writeTableCreationStmtEnding(Table table, Map parameters) Writes the end of the table creation statement.

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

addEscapedCharSequence, alterDatabase, applyForSelectedChanges, areEqual, columnsDiffer, createExternalForeignKeys, createExternalForeignKeys, createTable, createTables, createTables, createTables, createTemporaryTable, createUniqueIdentifier, 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, processTableStructureChanges, processTableStructureChanges, setIndent, setValueDateFormat, setValueLocale, setValueNumberFormat, setValueTimeFormat, setWriter, shortenName, shouldGeneratePrimaryKeys, writeColumnAutoIncrementStmt, writeColumnDefaultValue, writeColumnDefaultValueStmt, writeColumnNotNullableStmt, writeColumnNullableStmt, writeColumns, writeEmbeddedForeignKeysStmt, writeEmbeddedIndexCreateStmt, writeEmbeddedIndicesStmt, writeEmbeddedPrimaryKeysStmt, writeExternalForeignKeyCreateStmt, writeExternalIndexCreateStmt, writeExternalIndicesCreateStmt, writeExternalPrimaryKeysCreateStmt, writeForeignReferences, writeLocalReferences, writePrimaryKeyStmt, writeTableAlterStmt, writeTableComment, writeTableCreationStmt

Methods inherited from class java.lang.Object

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

Constructor Detail

SybaseBuilder

public SybaseBuilder(Platform platform)

Creates a new builder instance.

Parameters:

platform - The plaftform this builder belongs to

Method Detail

createTable

public void createTable(Database database,
               Table table,
               Map parameters)
                 throws IOException

Outputs the DDL to create the table along with any non-external constraints as well as with external primary keys and indices (but not foreign keys).

Overrides:

createTable in class SqlBuilder

Parameters:

database - The database model

table - The table

parameters - Additional platform-specific parameters for the table creation

Throws:

IOException

writeTableCreationStmtEnding

protected void writeTableCreationStmtEnding(Table table,
                                Map parameters)
                                     throws IOException

Writes the end of the table creation statement. Per default, only the end of the statement is written, but this can be changed in subclasses.

Overrides:

writeTableCreationStmtEnding in class SqlBuilder

Parameters:

table - The table

parameters - Additional platform-specific parameters for the table creation

Throws:

IOException

writeColumn

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

Outputs the DDL for the specified column.

Overrides:

writeColumn in class SqlBuilder

Parameters:

table - The table containing the column

column - The column

Throws:

IOException

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

dropTable

public void dropTable(Table table)
               throws IOException

Outputs the DDL to drop the table. Note that this method does not drop foreign keys to this table. Use SqlBuilder.dropTable(Database, Table) if you want that.

Overrides:

dropTable in class SqlBuilder

Parameters:

table - The table to drop

Throws:

IOException

writeExternalForeignKeyDropStmt

protected void writeExternalForeignKeyDropStmt(Table table,
                                   ForeignKey foreignKey)
                                        throws IOException

Generates the statement to drop a foreignkey constraint from the database using an alter table statement.

Overrides:

writeExternalForeignKeyDropStmt in class SqlBuilder

Parameters:

table - The table

foreignKey - The foreign key

Throws:

IOException

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

dropExternalForeignKeys

public void dropExternalForeignKeys(Table table)
                             throws IOException

Creates external foreignkey drop statements.

Overrides:

dropExternalForeignKeys in class SqlBuilder

Parameters:

table - The table

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

getEnableIdentityOverrideSql

protected String getEnableIdentityOverrideSql(Table table)

Returns the SQL to enable identity override mode.

Parameters:

table - The table to enable the mode for

Returns:

The SQL

getDisableIdentityOverrideSql

protected String getDisableIdentityOverrideSql(Table table)

Returns the SQL to disable identity override mode.

Parameters:

table - The table to disable the mode for

Returns:

The SQL

getQuotationOnStatement

protected String getQuotationOnStatement()

Returns the statement that turns on the ability to write delimited identifiers.

Returns:

The quotation-on statement

writeCopyDataStatement

protected void writeCopyDataStatement(Table sourceTable,
                          Table targetTable)
                               throws IOException

Writes a statement that copies the data from the source to the target table. Note that this copies only those columns that are in both tables. Database-specific implementations might redefine this method though they usually it suffices to redefine the SqlBuilder.writeCastExpression(Column, Column) method.

Overrides:

writeCopyDataStatement in class SqlBuilder

Parameters:

sourceTable - The source table

targetTable - The target table

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

processChanges

protected void processChanges(Database currentModel,
                  Database desiredModel,
                  List changes,
                  CreationParameters params)
                       throws IOException

Processes the changes. The default argument performs several passes:

1. RemoveForeignKeyChange and RemoveIndexChange come first to allow for e.g. subsequent primary key changes or column removal.
2. RemoveTableChange comes after the removal of foreign keys and indices.
3. These are all handled together:
   RemovePrimaryKeyChange
AddPrimaryKeyChange
PrimaryKeyChange
RemoveColumnChange
AddColumnChange
ColumnAutoIncrementChange
ColumnDefaultValueChange
ColumnRequiredChange
ColumnDataTypeChange
ColumnSizeChange
   The reason for this is that the default algorithm rebuilds the table for these changes and thus their order is irrelevant.
4. AddTableChange
   needs to come after the table removal (so that tables of the same name are removed) and before the addition of foreign keys etc.
5. AddForeignKeyChange and AddIndexChange come last after table/column/primary key additions or changes.

Overrides:

processChanges in class SqlBuilder

Parameters:

currentModel - The current database schema

desiredModel - The desired database schema

changes - The changes

params - The parameters used in the creation of new tables. Note that for existing tables, the parameters won't be applied

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,
                 ColumnDefaultValueChange change)
                      throws IOException

Processes the change of the default value of a column. Note that this method is only used if it is the only change to that column.

Parameters:

currentModel - The current database schema

desiredModel - The desired database schema

change - The change object

Throws:

IOException

processColumnChange

protected void processColumnChange(Table sourceTable,
                       Table targetTable,
                       Column sourceColumn,
                       Column targetColumn)
                            throws IOException

Processes a change to a column.

Parameters:

sourceTable - The current table

targetTable - The desired table

sourceColumn - The current column

targetColumn - The desired column

Throws:

IOException