package org.jumpmind.db.platform.hsqldb;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.sql.Types;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import org.jumpmind.db.alter.AddColumnChange;
import org.jumpmind.db.alter.CopyColumnValueChange;
import org.jumpmind.db.alter.RemoveColumnChange;
import org.jumpmind.db.alter.TableChange;
import org.jumpmind.db.model.Database;
import org.jumpmind.db.model.Table;
import org.jumpmind.db.platform.AbstractDdlBuilder;
import org.jumpmind.db.platform.DatabaseNamesConstants;
/*
* The SQL Builder for the HsqlDb database.
*/
public class HsqlDbDdlBuilder extends AbstractDdlBuilder {
public HsqlDbDdlBuilder() {
super(DatabaseNamesConstants.HSQLDB);
databaseInfo.setNonPKIdentityColumnsSupported(false);
databaseInfo.setIdentityOverrideAllowed(false);
databaseInfo.setSystemForeignKeyIndicesAlwaysNonUnique(true);
databaseInfo.addNativeTypeMapping(Types.ARRAY, "LONGVARBINARY", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.BLOB, "LONGVARBINARY", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.CLOB, "LONGVARCHAR", Types.LONGVARCHAR);
databaseInfo.addNativeTypeMapping(Types.DISTINCT, "LONGVARBINARY", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.FLOAT, "DOUBLE", Types.DOUBLE);
databaseInfo.addNativeTypeMapping(Types.JAVA_OBJECT, "OBJECT");
databaseInfo.addNativeTypeMapping(Types.NULL, "LONGVARBINARY", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.REF, "LONGVARBINARY", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.STRUCT, "LONGVARBINARY", Types.LONGVARBINARY);
// JDBC's TINYINT requires a value range of -255 to 255, but HsqlDb's is
// only -128 to 127
databaseInfo.addNativeTypeMapping(Types.TINYINT, "SMALLINT", Types.SMALLINT);
databaseInfo.addNativeTypeMapping("BIT", "BOOLEAN", "BOOLEAN");
databaseInfo.addNativeTypeMapping("DATALINK", "LONGVARBINARY", "LONGVARBINARY");
databaseInfo.setDefaultSize(Types.CHAR, Integer.MAX_VALUE);
databaseInfo.setDefaultSize(Types.VARCHAR, Integer.MAX_VALUE);
databaseInfo.setDefaultSize(Types.BINARY, Integer.MAX_VALUE);
databaseInfo.setDefaultSize(Types.VARBINARY, Integer.MAX_VALUE);
databaseInfo.setNonBlankCharColumnSpacePadded(true);
databaseInfo.setBlankCharColumnSpacePadded(true);
databaseInfo.setCharColumnSpaceTrimmed(false);
databaseInfo.setEmptyStringNulled(false);
}
@Override
protected void dropTable(Table table, StringBuilder ddl, boolean temporary, boolean recreate) {
ddl.append("DROP TABLE ");
ddl.append(getFullyQualifiedTableNameShorten(table));
ddl.append(" IF EXISTS");
printEndOfStatement(ddl);
}
@Override
public String getSelectLastIdentityValues(Table table) {
return "CALL IDENTITY()";
}
@Override
protected void processTableStructureChanges(Database currentModel, Database desiredModel,
Table sourceTable, Table targetTable, List<TableChange> changes, StringBuilder ddl) {
// HsqlDb can only drop columns that are not part of a primary key
for (Iterator<TableChange> changeIt = changes.iterator(); changeIt.hasNext();) {
TableChange change = changeIt.next();
if ((change instanceof RemoveColumnChange)
&& ((RemoveColumnChange) change).getColumn().isPrimaryKey()) {
return;
}
}
// in order to utilize the ALTER TABLE ADD COLUMN BEFORE statement
// we have to apply the add column changes in the correct order
// thus we first gather all add column changes and then execute them
// Since we get them in target table column order, we can simply
// iterate backwards
ArrayList<AddColumnChange> addColumnChanges = new ArrayList<AddColumnChange>();
for (Iterator<TableChange> changeIt = changes.iterator(); changeIt.hasNext();) {
TableChange change = changeIt.next();
if (change instanceof AddColumnChange) {
addColumnChanges.add((AddColumnChange) change);
changeIt.remove();
}
}
for (ListIterator<AddColumnChange> changeIt = addColumnChanges
.listIterator(addColumnChanges.size()); changeIt.hasPrevious();) {
AddColumnChange addColumnChange = (AddColumnChange) changeIt.previous();
processChange(currentModel, desiredModel, addColumnChange, ddl);
changeIt.remove();
}
for (Iterator<TableChange> changeIt = changes.iterator(); changeIt.hasNext();) {
TableChange change = changeIt.next();
if (change instanceof RemoveColumnChange) {
RemoveColumnChange removeColumnChange = (RemoveColumnChange) change;
processChange(currentModel, desiredModel, removeColumnChange, ddl);
changeIt.remove();
} else if (change instanceof CopyColumnValueChange) {
CopyColumnValueChange copyColumnChange = (CopyColumnValueChange)change;
processChange(currentModel, desiredModel, copyColumnChange, ddl);
changeIt.remove();
}
}
}
/*
* Processes the addition of a column to a table.
*/
protected void processChange(Database currentModel, Database desiredModel,
AddColumnChange change, StringBuilder ddl) {
ddl.append("ALTER TABLE ");
ddl.append(getFullyQualifiedTableNameShorten(change.getChangedTable()));
printIndent(ddl);
ddl.append("ADD COLUMN ");
writeColumn(change.getChangedTable(), change.getNewColumn(), ddl);
if (change.getNextColumn() != null) {
ddl.append(" BEFORE ");
printIdentifier(getColumnName(change.getNextColumn()), ddl);
}
printEndOfStatement(ddl);
change.apply(currentModel, delimitedIdentifierModeOn);
}
/*
* Processes the removal of a column from a table.
*/
protected void processChange(Database currentModel, Database desiredModel,
RemoveColumnChange change, StringBuilder ddl) {
ddl.append("ALTER TABLE ");
ddl.append(getFullyQualifiedTableNameShorten(change.getChangedTable()));
printIndent(ddl);
ddl.append("DROP COLUMN ");
printIdentifier(getColumnName(change.getColumn()), ddl);
printEndOfStatement(ddl);
change.apply(currentModel, delimitedIdentifierModeOn);
}
}