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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.
package org.jumpmind.db.platform.sqlanywhere;
/*
* 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.rmi.server.UID;
import java.sql.Types;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.jumpmind.db.alter.AddColumnChange;
import org.jumpmind.db.alter.AddPrimaryKeyChange;
import org.jumpmind.db.alter.ColumnAutoIncrementChange;
import org.jumpmind.db.alter.ColumnChange;
import org.jumpmind.db.alter.ColumnDefaultValueChange;
import org.jumpmind.db.alter.CopyColumnValueChange;
import org.jumpmind.db.alter.IModelChange;
import org.jumpmind.db.alter.PrimaryKeyChange;
import org.jumpmind.db.alter.RemoveColumnChange;
import org.jumpmind.db.alter.RemovePrimaryKeyChange;
import org.jumpmind.db.alter.TableChange;
import org.jumpmind.db.model.Column;
import org.jumpmind.db.model.Database;
import org.jumpmind.db.model.ForeignKey;
import org.jumpmind.db.model.IIndex;
import org.jumpmind.db.model.Table;
import org.jumpmind.db.platform.AbstractDdlBuilder;
import org.jumpmind.db.platform.DatabaseNamesConstants;
import org.jumpmind.db.platform.PlatformUtils;
/*
* The SQL Builder for Sybase.
*/
public class SqlAnywhereDdlBuilder extends AbstractDdlBuilder {
public SqlAnywhereDdlBuilder() {
super(DatabaseNamesConstants.SQLANYWHERE);
databaseInfo.setMaxIdentifierLength(128);
databaseInfo.setNullAsDefaultValueRequired(true);
databaseInfo.setCommentPrefix("/*");
databaseInfo.setCommentSuffix("*/");
databaseInfo.setDelimiterToken("\"");
databaseInfo.addNativeTypeMapping(Types.ARRAY, "IMAGE");
// we're not using the native BIT type because it is rather limited
// (cannot be NULL, cannot be indexed)
databaseInfo.addNativeTypeMapping(Types.BIT, "SMALLINT", Types.SMALLINT);
databaseInfo.addNativeTypeMapping(Types.BLOB, "IMAGE", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.CLOB, "TEXT", Types.LONGVARCHAR);
databaseInfo.addNativeTypeMapping(Types.DATE, "DATETIME", Types.TIMESTAMP);
databaseInfo.addNativeTypeMapping(Types.DISTINCT, "IMAGE", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.DOUBLE, "DOUBLE PRECISION");
databaseInfo.addNativeTypeMapping(Types.FLOAT, "DOUBLE PRECISION", Types.DOUBLE);
databaseInfo.addNativeTypeMapping(Types.INTEGER, "INT");
databaseInfo.addNativeTypeMapping(Types.JAVA_OBJECT, "IMAGE", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.LONGVARBINARY, "IMAGE");
databaseInfo.addNativeTypeMapping(Types.LONGVARCHAR, "TEXT");
databaseInfo.addNativeTypeMapping(Types.NULL, "IMAGE", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.OTHER, "IMAGE", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.REF, "IMAGE", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.STRUCT, "IMAGE", Types.LONGVARBINARY);
databaseInfo.addNativeTypeMapping(Types.TIME, "DATETIME", Types.TIMESTAMP);
databaseInfo.addNativeTypeMapping(Types.TIMESTAMP, "DATETIME", Types.TIMESTAMP);
databaseInfo.addNativeTypeMapping(Types.TINYINT, "SMALLINT", Types.SMALLINT);
databaseInfo.addNativeTypeMapping("BOOLEAN", "SMALLINT", "SMALLINT");
databaseInfo.addNativeTypeMapping("DATALINK", "IMAGE", "LONGVARBINARY");
databaseInfo.setDefaultSize(Types.BINARY, 254);
databaseInfo.setDefaultSize(Types.VARBINARY, 254);
databaseInfo.setDefaultSize(Types.CHAR, 254);
databaseInfo.setDefaultSize(Types.VARCHAR, 254);
databaseInfo.setDateOverridesToTimestamp(true);
databaseInfo.setNonBlankCharColumnSpacePadded(true);
databaseInfo.setBlankCharColumnSpacePadded(true);
databaseInfo.setCharColumnSpaceTrimmed(false);
databaseInfo.setEmptyStringNulled(false);
databaseInfo.setAutoIncrementUpdateAllowed(false);
databaseInfo.setRequiresAutoCommitForDdl(true);
addEscapedCharSequence("'", "''");
}
@Override
protected void createTable(Table table, StringBuilder ddl, boolean temporary, boolean recreate) {
writeQuotationOnStatement(ddl);
super.createTable(table, ddl, temporary, recreate);
}
@Override
protected void writeColumn(Table table, Column column, StringBuilder ddl) {
printIdentifier(getColumnName(column), ddl);
ddl.append(" ");
ddl.append(getSqlType(column));
writeColumnDefaultValueStmt(table, column, ddl);
// Sybase does not like NULL/NOT NULL and IDENTITY together
if (column.isAutoIncrement()) {
ddl.append(" ");
writeColumnAutoIncrementStmt(table, column, ddl);
} else {
ddl.append(" ");
if (column.isRequired()) {
writeColumnNotNullableStmt(ddl);
} else {
// we'll write a NULL for all columns that are not required
writeColumnNullableStmt(ddl);
}
}
}
@Override
protected String getNativeDefaultValue(Column column) {
if ((column.getMappedTypeCode() == Types.BIT)
|| (PlatformUtils.supportsJava14JdbcTypes() && (column.getMappedTypeCode() == PlatformUtils
.determineBooleanTypeCode()))) {
return getDefaultValueHelper().convert(column.getDefaultValue(), column.getMappedTypeCode(),
Types.SMALLINT).toString();
} else {
return super.getNativeDefaultValue(column);
}
}
@Override
protected void dropTable(Table table, StringBuilder ddl, boolean temporary, boolean recreate) {
writeQuotationOnStatement(ddl);
ddl.append("IF EXISTS (SELECT 1 FROM sysobjects WHERE type = 'U' AND name = ");
printAlwaysSingleQuotedIdentifier(getTableName(table.getName()), ddl);
println(")", ddl);
println("BEGIN", ddl);
printIndent(ddl);
ddl.append("DROP TABLE ");
printlnIdentifier(getTableName(table.getName()), ddl);
ddl.append("END");
printEndOfStatement(ddl);
}
@Override
protected void writeExternalForeignKeyDropStmt(Table table, ForeignKey foreignKey,
StringBuilder ddl) {
String constraintName = getForeignKeyName(table, foreignKey);
ddl.append("IF EXISTS (SELECT 1 FROM sysobjects WHERE type = 'RI' AND name = ");
printAlwaysSingleQuotedIdentifier(constraintName, ddl);
println(")", ddl);
printIndent(ddl);
ddl.append("ALTER TABLE ");
printIdentifier(getTableName(table.getName()), ddl);
ddl.append(" DROP CONSTRAINT ");
printIdentifier(constraintName, ddl);
printEndOfStatement(ddl);
}
@Override
public void writeExternalIndexDropStmt(Table table, IIndex index, StringBuilder ddl) {
ddl.append("DROP INDEX ");
printIdentifier(getTableName(table.getName()), ddl);
ddl.append(".");
printIdentifier(getIndexName(index), ddl);
printEndOfStatement(ddl);
}
@Override
public void dropExternalForeignKeys(Table table, StringBuilder ddl) {
writeQuotationOnStatement(ddl);
super.dropExternalForeignKeys(table, ddl);
}
@Override
public String getSelectLastIdentityValues(Table table) {
return "SELECT @@IDENTITY";
}
/*
* Returns the statement that turns on the ability to write delimited
* identifiers.
*
* @return The quotation-on statement
*/
protected String getQuotationOnStatement() {
if (delimitedIdentifierModeOn) {
return "SET quoted_identifier on";
} else {
return "";
}
}
/*
* Writes the statement that turns on the ability to write delimited
* identifiers.
*/
private void writeQuotationOnStatement(StringBuilder ddl) {
ddl.append(getQuotationOnStatement());
printEndOfStatement(ddl);
}
/*
* Prints the given identifier with enforced single quotes around it
* regardless of whether delimited identifiers are turned on or not.
*
* @param identifier The identifier
*/
private void printAlwaysSingleQuotedIdentifier(String identifier, StringBuilder ddl) {
ddl.append("'");
ddl.append(identifier);
ddl.append("'");
}
@Override
protected void writeCastExpression(Column sourceColumn, Column targetColumn, StringBuilder ddl) {
String sourceNativeType = getBareNativeType(sourceColumn);
String targetNativeType = getBareNativeType(targetColumn);
if (sourceNativeType.equals(targetNativeType)) {
printIdentifier(getColumnName(sourceColumn), ddl);
} else {
ddl.append("CONVERT(");
ddl.append(getNativeType(targetColumn));
ddl.append(",");
printIdentifier(getColumnName(sourceColumn), ddl);
ddl.append(")");
}
}
@Override
protected void processChanges(Database currentModel, Database desiredModel,
List changes, StringBuilder ddl) {
if (!changes.isEmpty()) {
writeQuotationOnStatement(ddl);
}
super.processChanges(currentModel, desiredModel, changes, ddl);
}
@Override
protected void processTableStructureChanges(Database currentModel, Database desiredModel,
Table sourceTable, Table targetTable, List changes, StringBuilder ddl) {
// First we drop primary keys as necessary
for (Iterator changeIt = changes.iterator(); changeIt.hasNext();) {
TableChange change = (TableChange) changeIt.next();
if (change instanceof RemovePrimaryKeyChange) {
processChange(currentModel, desiredModel, (RemovePrimaryKeyChange) change, ddl);
changeIt.remove();
} else if (change instanceof PrimaryKeyChange) {
PrimaryKeyChange pkChange = (PrimaryKeyChange) change;
RemovePrimaryKeyChange removePkChange = new RemovePrimaryKeyChange(
pkChange.getChangedTable(), pkChange.getOldPrimaryKeyColumns());
processChange(currentModel, desiredModel, removePkChange, ddl);
}
}
HashMap columnChanges = new HashMap();
// Next we add/remove columns
for (Iterator changeIt = changes.iterator(); changeIt.hasNext();) {
TableChange change = (TableChange) changeIt.next();
if (change instanceof AddColumnChange) {
AddColumnChange addColumnChange = (AddColumnChange) change;
// Sybase can only add not insert columns
if (addColumnChange.isAtEnd()) {
processChange(currentModel, desiredModel, addColumnChange, ddl);
changeIt.remove();
}
} else if (change instanceof RemoveColumnChange) {
processChange(currentModel, desiredModel, (RemoveColumnChange) change, ddl);
changeIt.remove();
} else if (change instanceof CopyColumnValueChange) {
CopyColumnValueChange copyColumnChange = (CopyColumnValueChange)change;
processChange(currentModel, desiredModel, copyColumnChange, ddl);
changeIt.remove();
} else if (change instanceof ColumnAutoIncrementChange) {
// Sybase has no way of adding or removing an IDENTITY
// constraint
// Thus we have to rebuild the table anyway and can ignore all
// the other
// column changes
columnChanges = null;
} else if ((change instanceof ColumnChange) && (columnChanges != null)) {
// we gather all changed columns because we can use the ALTER
// TABLE ALTER COLUMN
// statement for them
ColumnChange columnChange = (ColumnChange) change;
ArrayList changesPerColumn = (ArrayList) columnChanges.get(columnChange
.getChangedColumn());
if (changesPerColumn == null) {
changesPerColumn = new ArrayList();
columnChanges.put(columnChange.getChangedColumn(), changesPerColumn);
}
changesPerColumn.add(change);
}
}
if (columnChanges != null) {
for (Iterator changesPerColumnIt = columnChanges.entrySet().iterator(); changesPerColumnIt
.hasNext();) {
Map.Entry entry = (Map.Entry) changesPerColumnIt.next();
Column sourceColumn = (Column) entry.getKey();
ArrayList changesPerColumn = (ArrayList) entry.getValue();
// Sybase does not like us to use the ALTER TABLE ALTER
// statement if we don't actually
// change the datatype or the required constraint but only the
// default value
// Thus, if we only have to change the default, we use a
// different handler
if ((changesPerColumn.size() == 1)
&& (changesPerColumn.get(0) instanceof ColumnDefaultValueChange)) {
processChange(currentModel, desiredModel,
(ColumnDefaultValueChange) changesPerColumn.get(0), ddl);
} else {
Column targetColumn = targetTable.findColumn(sourceColumn.getName(),
delimitedIdentifierModeOn);
processColumnChange(sourceTable, targetTable, sourceColumn, targetColumn, ddl);
}
for (Iterator changeIt = changesPerColumn.iterator(); changeIt.hasNext();) {
((ColumnChange) changeIt.next()).apply(currentModel,
delimitedIdentifierModeOn);
}
}
}
// Finally we add primary keys
for (Iterator changeIt = changes.iterator(); changeIt.hasNext();) {
TableChange change = (TableChange) changeIt.next();
if (change instanceof AddPrimaryKeyChange) {
processChange(currentModel, desiredModel, (AddPrimaryKeyChange) change, ddl);
changeIt.remove();
} else if (change instanceof PrimaryKeyChange) {
PrimaryKeyChange pkChange = (PrimaryKeyChange) change;
AddPrimaryKeyChange addPkChange = new AddPrimaryKeyChange(
pkChange.getChangedTable(), pkChange.getNewPrimaryKeyColumns());
processChange(currentModel, desiredModel, addPkChange, 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 ");
printlnIdentifier(getTableName(change.getChangedTable().getName()), ddl);
printIndent(ddl);
ddl.append("ADD ");
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 ");
printIdentifier(getColumnName(change.getColumn()), ddl);
printEndOfStatement(ddl);
change.apply(currentModel, delimitedIdentifierModeOn);
}
/*
* Processes the removal of a primary key from a table.
*
* @param currentModel The current database schema
*
* @param desiredModel The desired database schema
*
* @param change The change object
*/
protected void processChange(Database currentModel, Database desiredModel,
RemovePrimaryKeyChange change, StringBuilder ddl) {
// TODO: this would be easier when named primary keys are supported
// because then we can use ALTER TABLE DROP
String tableName = getTableName(change.getChangedTable().getName());
String tableNameVar = "tn" + createUniqueIdentifier();
String constraintNameVar = "cn" + createUniqueIdentifier();
println("BEGIN", ddl);
println(" DECLARE @" + tableNameVar + " nvarchar(60), @" + constraintNameVar
+ " nvarchar(60)", ddl);
println(" WHILE EXISTS(SELECT sysindexes.name", ddl);
println(" FROM sysindexes, sysobjects", ddl);
ddl.append(" WHERE sysobjects.name = ");
printAlwaysSingleQuotedIdentifier(tableName, ddl);
println(" AND sysobjects.id = sysindexes.id AND (sysindexes.status & 2048) > 0)", ddl);
println(" BEGIN", ddl);
println(" SELECT @" + tableNameVar + " = sysobjects.name, @" + constraintNameVar
+ " = sysindexes.name", ddl);
println(" FROM sysindexes, sysobjects", ddl);
ddl.append(" WHERE sysobjects.name = ");
printAlwaysSingleQuotedIdentifier(tableName, ddl);
ddl.append(" AND sysobjects.id = sysindexes.id AND (sysindexes.status & 2048) > 0");
println(" EXEC ('ALTER TABLE '+@" + tableNameVar + "+' DROP CONSTRAINT '+@"
+ constraintNameVar + ")", ddl);
println(" END", ddl);
ddl.append("END");
printEndOfStatement(ddl);
change.apply(currentModel, delimitedIdentifierModeOn);
}
/*
* Processes the change of the default value of a column. Note that this
* method is only used if it is the only change to that column.
*/
protected void processChange(Database currentModel, Database desiredModel,
ColumnDefaultValueChange change, StringBuilder ddl) {
ddl.append("ALTER TABLE ");
printlnIdentifier(getTableName(change.getChangedTable().getName()), ddl);
printIndent(ddl);
ddl.append("REPLACE ");
printIdentifier(getColumnName(change.getChangedColumn()), ddl);
Table curTable = currentModel.findTable(change.getChangedTable().getName(),
delimitedIdentifierModeOn);
Column curColumn = curTable.findColumn(change.getChangedColumn().getName(),
delimitedIdentifierModeOn);
ddl.append(" DEFAULT ");
if (isValidDefaultValue(change.getNewDefaultValue(), curColumn.getMappedTypeCode())) {
printDefaultValue(change.getNewDefaultValue(), curColumn.getMappedTypeCode(), ddl);
} else {
ddl.append("NULL");
}
printEndOfStatement(ddl);
change.apply(currentModel, delimitedIdentifierModeOn);
}
/*
* Processes a change to a column.
*/
protected void processColumnChange(Table sourceTable, Table targetTable, Column sourceColumn,
Column targetColumn, StringBuilder ddl) {
Object oldParsedDefault = sourceColumn.getParsedDefaultValue();
Object newParsedDefault = targetColumn.getParsedDefaultValue();
String newDefault = targetColumn.getDefaultValue();
boolean defaultChanges = ((oldParsedDefault == null) && (newParsedDefault != null))
|| ((oldParsedDefault != null) && !oldParsedDefault.equals(newParsedDefault));
// Sybase does not like it if there is a default spec in the ALTER TABLE
// ALTER
// statement; thus we have to change the default afterwards
if (newDefault != null) {
targetColumn.setDefaultValue(null);
}
if (defaultChanges) {
// we're first removing the default as it might make problems when
// the
// datatype changes
ddl.append("ALTER TABLE ");
printlnIdentifier(getTableName(sourceTable.getName()), ddl);
printIndent(ddl);
ddl.append("REPLACE ");
printIdentifier(getColumnName(sourceColumn), ddl);
ddl.append(" DEFAULT NULL");
printEndOfStatement(ddl);
}
ddl.append("ALTER TABLE ");
printlnIdentifier(getTableName(sourceTable.getName()), ddl);
printIndent(ddl);
ddl.append("MODIFY ");
writeColumn(sourceTable, targetColumn, ddl);
printEndOfStatement(ddl);
if (defaultChanges) {
ddl.append("ALTER TABLE ");
printlnIdentifier(getTableName(sourceTable.getName()), ddl);
printIndent(ddl);
ddl.append("REPLACE ");
printIdentifier(getColumnName(sourceColumn), ddl);
if (newDefault != null) {
targetColumn.setDefaultValue(newDefault);
writeColumnDefaultValueStmt(sourceTable, targetColumn, ddl);
} else {
ddl.append(" DEFAULT NULL");
}
printEndOfStatement(ddl);
}
}
/**
* Creates a reasonably unique identifier only consisting of hexadecimal
* characters and underscores. It looks like
* d578271282b42fce__2955b56e_107df3fbc96__8000 and is 48
* characters long.
*
* @return The identifier
*/
protected String createUniqueIdentifier() {
return new UID().toString().replace(':', '_').replace('-', '_');
}
}
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