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java.lang.Objectorg.apache.ddlutils.platform.SqlBuilder
org.apache.ddlutils.platform.db2.Db2Builder
The SQL Builder for DB2.
Field Summary |
Fields inherited from class org.apache.ddlutils.platform.SqlBuilder |
_log, SIZE_PLACEHOLDER |
Constructor Summary | |
Db2Builder(Platform platform)
Creates a new builder instance. |
Method Summary | |
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. This is obviously only useful for pk fields that are auto-incrementing. A database that does not support this, will return null . |
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. 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 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. Per default, simply the name of the source column is written thereby assuming that any casts happen implicitly. |
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 java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public Db2Builder(Platform platform)
platform
- The plaftform this builder belongs toMethod Detail |
protected String getNativeDefaultValue(Column column)
getNativeDefaultValue
in class SqlBuilder
column
- The column
protected void writeColumnAutoIncrementStmt(Table table, Column column) throws IOException
writeColumnAutoIncrementStmt
in class SqlBuilder
table
- The tablecolumn
- The column
IOException
public String getSelectLastIdentityValues(Table table)
null
.
getSelectLastIdentityValues
in class SqlBuilder
table
- The table
null
if the database does not support thispublic void writeExternalIndexDropStmt(Table table, Index index) throws IOException
writeExternalIndexDropStmt
in class SqlBuilder
table
- The table the index is onindex
- The index to drop
IOException
protected void writeCastExpression(Column sourceColumn, Column targetColumn) throws IOException
writeCastExpression
in class SqlBuilder
sourceColumn
- The source columntargetColumn
- The target column
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
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