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This library is a fork of Apache DdlUtils. DdlUtils is a small, easy-to-use component for working with Database Definition (DDL) files.
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package org.jumpmind.db.platform.h2;
/*
* 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.Iterator;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.jumpmind.db.alter.AddColumnChange;
import org.jumpmind.db.alter.ColumnAutoIncrementChange;
import org.jumpmind.db.alter.ColumnDataTypeChange;
import org.jumpmind.db.alter.ColumnDefaultValueChange;
import org.jumpmind.db.alter.ColumnRequiredChange;
import org.jumpmind.db.alter.ColumnSizeChange;
import org.jumpmind.db.alter.CopyColumnValueChange;
import org.jumpmind.db.alter.RemoveColumnChange;
import org.jumpmind.db.alter.TableChange;
import org.jumpmind.db.model.Column;
import org.jumpmind.db.model.Database;
import org.jumpmind.db.model.IIndex;
import org.jumpmind.db.model.ModelException;
import org.jumpmind.db.model.Table;
import org.jumpmind.db.platform.AbstractDdlBuilder;
import org.jumpmind.db.platform.DatabaseNamesConstants;
/*
* The SQL Builder for the H2 database.
*/
public class H2DdlBuilder extends AbstractDdlBuilder {
public H2DdlBuilder() {
super(DatabaseNamesConstants.H2);
databaseInfo.setNonPKIdentityColumnsSupported(false);
databaseInfo.setIdentityOverrideAllowed(false);
databaseInfo.setSystemForeignKeyIndicesAlwaysNonUnique(true);
databaseInfo.setNullAsDefaultValueRequired(false);
databaseInfo.addNativeTypeMapping(Types.ARRAY, "BINARY", Types.BINARY);
databaseInfo.addNativeTypeMapping(Types.DISTINCT, "BINARY", Types.BINARY);
databaseInfo.addNativeTypeMapping(Types.NULL, "BINARY", Types.BINARY);
databaseInfo.addNativeTypeMapping(Types.REF, "BINARY", Types.BINARY);
databaseInfo.addNativeTypeMapping(Types.STRUCT, "BINARY", Types.BINARY);
databaseInfo.addNativeTypeMapping(Types.DATALINK, "BINARY", Types.BINARY);
databaseInfo.addNativeTypeMapping(Types.BIT, "BOOLEAN", Types.BIT);
databaseInfo.addNativeTypeMapping(Types.NUMERIC, "DECIMAL", Types.DECIMAL);
databaseInfo.addNativeTypeMapping(Types.BINARY, "BINARY", Types.BINARY);
databaseInfo.addNativeTypeMapping(Types.BLOB, "BLOB", Types.BLOB);
databaseInfo.addNativeTypeMapping(Types.CLOB, "CLOB", Types.CLOB);
databaseInfo.addNativeTypeMapping(Types.LONGVARCHAR, "VARCHAR("+Integer.MAX_VALUE+")", Types.VARCHAR);
databaseInfo.addNativeTypeMapping(Types.FLOAT, "DOUBLE", Types.DOUBLE);
databaseInfo.addNativeTypeMapping(Types.JAVA_OBJECT, "OTHER");
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(false);
databaseInfo.setBlankCharColumnSpacePadded(false);
databaseInfo.setCharColumnSpaceTrimmed(true);
databaseInfo.setEmptyStringNulled(false);
addEscapedCharSequence("'", "''");
}
@Override
protected void processTableStructureChanges(Database currentModel, Database desiredModel,
Table sourceTable, Table targetTable, List changes, StringBuilder ddl) {
for (Iterator changeIt = changes.iterator(); changeIt.hasNext();) {
TableChange change = changeIt.next();
if (change instanceof AddColumnChange) {
AddColumnChange addColumnChange = (AddColumnChange) change;
processChange(currentModel, desiredModel, addColumnChange, ddl);
changeIt.remove();
} else if (change instanceof CopyColumnValueChange) {
CopyColumnValueChange copyColumnChange = (CopyColumnValueChange)change;
processChange(currentModel, desiredModel, copyColumnChange, ddl);
changeIt.remove();
} else if (change instanceof RemoveColumnChange) {
processChange(currentModel, desiredModel, (RemoveColumnChange) change, ddl);
changeIt.remove();
} else if (change instanceof ColumnDefaultValueChange) {
ColumnDefaultValueChange defaultChange = (ColumnDefaultValueChange)change;
defaultChange.getChangedColumn().setDefaultValue(defaultChange.getNewDefaultValue());
writeAlterColumn(change.getChangedTable(), defaultChange.getChangedColumn(), ddl);
changeIt.remove();
} else if (change instanceof ColumnRequiredChange) {
ColumnRequiredChange defaultChange = (ColumnRequiredChange)change;
defaultChange.getChangedColumn().setRequired(!defaultChange.getChangedColumn().isRequired());
writeAlterColumn(change.getChangedTable(), defaultChange.getChangedColumn(), ddl);
changeIt.remove();
} else if (change instanceof ColumnSizeChange) {
ColumnSizeChange sizeChange = (ColumnSizeChange)change;
sizeChange.getChangedColumn().setSizeAndScale(sizeChange.getNewSize(), sizeChange.getNewScale());
writeAlterColumn(change.getChangedTable(), sizeChange.getChangedColumn(), ddl);
changeIt.remove();
} else if (change instanceof ColumnAutoIncrementChange) {
ColumnAutoIncrementChange defaultChange = (ColumnAutoIncrementChange)change;
defaultChange.getColumn().setAutoIncrement(!defaultChange.getColumn().isAutoIncrement());
writeAlterColumn(change.getChangedTable(), defaultChange.getColumn(), ddl);
changeIt.remove();
}
}
super.processTableStructureChanges(currentModel, desiredModel, sourceTable, targetTable,
changes, ddl);
}
protected void processChange(Database currentModel, Database desiredModel,
AddColumnChange change, StringBuilder ddl) {
ddl.append("ALTER TABLE ");
printlnIdentifier(getTableName(change.getChangedTable().getName()), ddl);
printIndent(ddl);
ddl.append("ADD COLUMN ");
writeColumn(change.getChangedTable(), change.getNewColumn(), 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 ");
printlnIdentifier(getTableName(change.getChangedTable().getName()), ddl);
printIndent(ddl);
ddl.append("DROP COLUMN ");
printIdentifier(getColumnName(change.getColumn()), ddl);
printEndOfStatement(ddl);
change.apply(currentModel, delimitedIdentifierModeOn);
}
@Override
protected void writeColumnDefaultValueStmt(Table table, Column column, StringBuilder ddl) {
Object parsedDefault = column.getParsedDefaultValue();
if (parsedDefault != null) {
if (!databaseInfo.isDefaultValuesForLongTypesSupported()
&& ((column.getMappedTypeCode() == Types.LONGVARBINARY) || (column.getMappedTypeCode() == Types.LONGVARCHAR))) {
throw new ModelException(
"The platform does not support default values for LONGVARCHAR or LONGVARBINARY columns");
}
// we write empty default value strings only if the type is not a
// numeric or date/time type
if (isValidDefaultValue(column.getDefaultValue(), column.getMappedTypeCode())) {
ddl.append(" DEFAULT ");
writeColumnDefaultValue(table, column, ddl);
}
} else if (databaseInfo.isDefaultValueUsedForIdentitySpec()
&& column.isAutoIncrement()) {
ddl.append(" DEFAULT ");
writeColumnDefaultValue(table, column, ddl);
} else if (!StringUtils.isBlank(column.getDefaultValue())) {
ddl.append(" DEFAULT ");
writeColumnDefaultValue(table, column, ddl);
}
}
@Override
public void writeExternalIndexDropStmt(Table table, IIndex index, StringBuilder ddl) {
ddl.append("DROP INDEX IF EXISTS ");
printIdentifier(getIndexName(index), ddl);
printEndOfStatement(ddl);
}
@Override
protected void writeColumnAutoIncrementStmt(Table table, Column column, StringBuilder ddl) {
ddl.append("AUTO_INCREMENT");
}
@Override
protected boolean writeAlterColumnDataType(ColumnDataTypeChange change, StringBuilder ddl) {
change.getChangedColumn().setTypeCode(change.getNewTypeCode());
writeAlterColumn(change.getChangedTable(), change.getChangedColumn(), ddl);
return true;
}
protected void writeAlterColumn(Table table, Column column, StringBuilder ddl) {
writeTableAlterStmt(table, ddl);
ddl.append("ALTER COLUMN ");
writeColumn(table, column, ddl);
printEndOfStatement(ddl);
}
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