/**
* Returns an array of EOSQLExpressions for deleting this column.
*
* @return an array of EOSQLExpressions for deleting this column
*/
@SuppressWarnings("unchecked")
public NSArray<EOSQLExpression> _deleteExpressions() {
EOSchemaSynchronization schemaSynchronization = _table.database().synchronizationFactory();
NSArray<EOSQLExpression> expressions =
schemaSynchronization.statementsToDeleteColumnNamed(
name(), _table.name(), (NSDictionary<String, String>) NSDictionary.EmptyDictionary);
ERXMigrationDatabase._ensureNotEmpty(expressions, "delete column", true);
return expressions;
}
/**
* Returns an array of EOSQLExpressions for creating this column.
*
* @return an array of EOSQLExpressions for creating this column
*/
@SuppressWarnings("unchecked")
public NSArray<EOSQLExpression> _createExpressions() {
EOSchemaSynchronization schemaSynchronization = _table.database().synchronizationFactory();
NSArray<EOSQLExpression> expressions =
schemaSynchronization.statementsToInsertColumnForAttribute(
_newAttribute(), (NSDictionary<String, String>) NSDictionary.EmptyDictionary);
ERXMigrationDatabase._ensureNotEmpty(expressions, "add column", true);
return expressions;
}
/**
* Changes the "allows null" state of this column.
*
* @param allowsNull if true, this column allows nulls
* @throws SQLException if the change fails
*/
@SuppressWarnings("unchecked")
public void setAllowsNull(boolean allowsNull) throws SQLException {
EOSchemaSynchronization schemaSynchronization = _table.database().synchronizationFactory();
NSArray<EOSQLExpression> expressions =
schemaSynchronization.statementsToModifyColumnNullRule(
name(),
_table.name(),
allowsNull,
(NSDictionary<String, String>) NSDictionary.EmptyDictionary);
ERXMigrationDatabase._ensureNotEmpty(expressions, "modify allows null", true);
ERXJDBCUtilities.executeUpdateScript(
_table.database().adaptorChannel(),
ERXMigrationDatabase._stringsForExpressions(expressions));
}
/**
* Changes the data type of this column.
*
* @param jdbcType the new JDBC type of the column (see java.sql.Types)
* @param scale the new scale
* @param precision the new precision
* @param width the new width
* @param options the options to use for conversion (or null)
* @throws SQLException if the change fails
*/
@SuppressWarnings("unchecked")
public void setDataType(int jdbcType, int scale, int precision, int width, NSDictionary options)
throws SQLException {
JDBCAdaptor adaptor = (JDBCAdaptor) _table.database().adaptor();
String externalType =
ERXSQLHelper.newSQLHelper(adaptor).externalTypeForJDBCType(adaptor, jdbcType);
EOSchemaSynchronization schemaSynchronization = _table.database().synchronizationFactory();
NSArray<EOSQLExpression> expressions =
schemaSynchronization.statementsToConvertColumnType(
_name,
_table.name(),
null,
new _ColumnType(externalType, scale, precision, width),
options);
ERXMigrationDatabase._ensureNotEmpty(expressions, "convert column type", true);
ERXJDBCUtilities.executeUpdateScript(
_table.database().adaptorChannel(),
ERXMigrationDatabase._stringsForExpressions(expressions));
_jdbcType = jdbcType;
_scale = scale;
_precision = precision;
_width = width;
}
