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java.lang.Objectorg.apache.ddlutils.platform.SqlBuilder
org.apache.ddlutils.platform.mysql.MySqlBuilder
The SQL Builder for MySQL.
Field Summary |
Fields inherited from class org.apache.ddlutils.platform.SqlBuilder |
_log, SIZE_PLACEHOLDER |
Constructor Summary | |
MySqlBuilder(Platform platform)
Creates a new builder instance. |
Method Summary | |
void |
dropTable(Table table)
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. |
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 .
Normally mysql will return the LAST_INSERT_ID as the column name for the inserted id. |
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 |
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. 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. |
protected boolean |
shouldGeneratePrimaryKeys(Column[] primaryKeyColumns)
Determines whether we should generate a primary key constraint for the given primary key columns. |
protected void |
writeColumnAutoIncrementStmt(Table table,
Column column)
Prints that the column is an auto increment column. |
protected void |
writeExternalForeignKeyDropStmt(Table table,
ForeignKey foreignKey)
Generates the statement to drop a foreignkey constraint from the database using an alter table statement. |
protected void |
writeTableCreationStmtEnding(Table table,
Map parameters)
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. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public MySqlBuilder(Platform platform)
platform
- The plaftform this builder belongs toMethod Detail |
public void dropTable(Table table) throws IOException
SqlBuilder.dropTable(Database, Table)
if you want that.
dropTable
in class SqlBuilder
table
- The table to drop
IOException
protected void writeColumnAutoIncrementStmt(Table table, Column column) throws IOException
writeColumnAutoIncrementStmt
in class SqlBuilder
table
- The tablecolumn
- The column
IOException
protected boolean shouldGeneratePrimaryKeys(Column[] primaryKeyColumns)
shouldGeneratePrimaryKeys
in class SqlBuilder
primaryKeyColumns
- The pk columns
true
if a pk statement should be generated for the columnspublic String getSelectLastIdentityValues(Table table)
null
.
Normally mysql will return the LAST_INSERT_ID as the column name for the inserted id.
Since ddlutils expects the real column name of the field that is autoincrementing, the
column has an alias of that column name.
getSelectLastIdentityValues
in class SqlBuilder
table
- The table
null
if the database does not support thisprotected void writeTableCreationStmtEnding(Table table, Map parameters) throws IOException
writeTableCreationStmtEnding
in class SqlBuilder
table
- The tableparameters
- Additional platform-specific parameters for the table creation
IOException
protected void writeExternalForeignKeyDropStmt(Table table, ForeignKey foreignKey) throws IOException
writeExternalForeignKeyDropStmt
in class SqlBuilder
table
- The tableforeignKey
- The foreign key
IOException
protected void processTableStructureChanges(Database currentModel, Database desiredModel, Table sourceTable, Table targetTable, Map parameters, List changes) throws IOException
AddPrimaryKeyChange
changes are
applied via an ALTER TABLE ADD CONSTRAINT
statement.
processTableStructureChanges
in class SqlBuilder
currentModel
- The current database schemadesiredModel
- The desired database schemasourceTable
- The original tabletargetTable
- The desired tableparameters
- The creation parameters for the tablechanges
- The change objects for the target table
IOException
protected void processChange(Database currentModel, Database desiredModel, AddColumnChange change) throws IOException
currentModel
- The current database schemadesiredModel
- The desired database schemachange
- The change object
IOException
protected void processChange(Database currentModel, Database desiredModel, RemoveColumnChange change) throws IOException
currentModel
- The current database schemadesiredModel
- The desired database schemachange
- The change object
IOException
protected void processChange(Database currentModel, Database desiredModel, RemovePrimaryKeyChange change) throws IOException
currentModel
- The current database schemadesiredModel
- The desired database schemachange
- The change object
IOException
protected void processChange(Database currentModel, Database desiredModel, PrimaryKeyChange change) throws IOException
currentModel
- The current database schemadesiredModel
- The desired database schemachange
- The change object
IOException
protected void processColumnChange(Table sourceTable, Table targetTable, Column sourceColumn, Column targetColumn) throws IOException
sourceTable
- The current tabletargetTable
- The desired tablesourceColumn
- The current columntargetColumn
- The desired column
IOException
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