HHH-5381 - HSQLDB new dialect (Fred Toussi)
git-svn-id: https://svn.jboss.org/repos/hibernate/core/trunk@19996 1b8cb986-b30d-0410-93ca-fae66ebed9b2
This commit is contained in:
Steve Ebersole
parent
7f815de1a7
commit
6b8d49ca82
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@ -1,10 +1,10 @@
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/*
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* Hibernate, Relational Persistence for Idiomatic Java
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*
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* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
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* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
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* indicated by the @author tags or express copyright attribution
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* statements applied by the authors. All third-party contributions are
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* distributed under license by Red Hat Middleware LLC.
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* distributed under license by Red Hat Inc.
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*
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* This copyrighted material is made available to anyone wishing to use, modify,
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* copy, or redistribute it subject to the terms and conditions of the GNU
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@ -20,7 +20,6 @@
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* Free Software Foundation, Inc.
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02110-1301 USA
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*
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*/
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package org.hibernate.dialect;
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@ -32,10 +31,11 @@ import org.hibernate.Hibernate;
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import org.hibernate.LockMode;
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import org.hibernate.StaleObjectStateException;
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import org.hibernate.JDBCException;
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import org.hibernate.dialect.function.AvgWithArgumentCastFunction;
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import org.hibernate.engine.SessionImplementor;
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import org.hibernate.persister.entity.Lockable;
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import org.hibernate.cfg.Environment;
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import org.hibernate.dialect.function.AvgWithArgumentCastFunction;
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import org.hibernate.dialect.function.SQLFunctionTemplate;
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import org.hibernate.dialect.function.NoArgSQLFunction;
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import org.hibernate.dialect.function.StandardSQLFunction;
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import org.hibernate.dialect.function.VarArgsSQLFunction;
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@ -43,29 +43,55 @@ import org.hibernate.dialect.lock.*;
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import org.hibernate.exception.JDBCExceptionHelper;
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import org.hibernate.exception.TemplatedViolatedConstraintNameExtracter;
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import org.hibernate.exception.ViolatedConstraintNameExtracter;
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import org.hibernate.util.ReflectHelper;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* An SQL dialect compatible with HSQLDB (Hypersonic SQL).
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* An SQL dialect compatible with HSQLDB (HyperSQL).
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* <p/>
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* Note this version supports HSQLDB version 1.8 and higher, only.
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* <p/>
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* Enhancements to version 3.5.0 GA to provide basic support for both HSQLDB 1.8.x and 2.0
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* Should work with Hibernate 3.2 and later
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*
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* @author Christoph Sturm
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* @author Phillip Baird
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* @author Fred Toussi
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*/
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public class HSQLDialect extends Dialect {
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private static final Logger log = LoggerFactory.getLogger( HSQLDialect.class );
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/**
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* version is 18 for 1.8 or 20 for 2.0
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*/
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private int hsqldbVersion = 18;
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public HSQLDialect() {
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super();
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try {
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Class props = ReflectHelper.classForName( "org.hsqldb.persist.HsqlDatabaseProperties" );
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String versionString = (String) props.getDeclaredField( "THIS_VERSION" ).get( null );
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hsqldbVersion = Integer.parseInt( versionString.substring( 0, 1 ) ) * 10;
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hsqldbVersion += Integer.parseInt( versionString.substring( 2, 3 ) );
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}
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catch ( Throwable e ) {
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// must be a very old version
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}
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registerColumnType( Types.BIGINT, "bigint" );
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registerColumnType( Types.BINARY, "binary" );
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registerColumnType( Types.BIT, "bit" );
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registerColumnType( Types.CHAR, "char(1)" );
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registerColumnType( Types.CHAR, "char($l)" );
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registerColumnType( Types.DATE, "date" );
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registerColumnType( Types.DECIMAL, "decimal" );
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registerColumnType( Types.DECIMAL, "decimal($p,$s)" );
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registerColumnType( Types.DOUBLE, "double" );
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registerColumnType( Types.FLOAT, "float" );
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registerColumnType( Types.INTEGER, "integer" );
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@ -77,12 +103,23 @@ public class HSQLDialect extends Dialect {
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registerColumnType( Types.TIMESTAMP, "timestamp" );
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registerColumnType( Types.VARCHAR, "varchar($l)" );
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registerColumnType( Types.VARBINARY, "varbinary($l)" );
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if ( hsqldbVersion < 20 ) {
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registerColumnType( Types.NUMERIC, "numeric" );
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}
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else {
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registerColumnType( Types.NUMERIC, "numeric($p,$s)" );
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}
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//HSQL has no Blob/Clob support .... but just put these here for now!
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if ( hsqldbVersion < 20 ) {
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registerColumnType( Types.BLOB, "longvarbinary" );
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registerColumnType( Types.CLOB, "longvarchar" );
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registerColumnType( Types.LONGVARBINARY, "longvarbinary" );
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registerColumnType( Types.LONGVARCHAR, "longvarchar" );
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}
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else {
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registerColumnType( Types.BLOB, "blob" );
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registerColumnType( Types.CLOB, "clob" );
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}
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registerFunction( "avg", new AvgWithArgumentCastFunction( "double" ) );
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@ -99,13 +136,16 @@ public class HSQLDialect extends Dialect {
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registerFunction( "space", new StandardSQLFunction( "space", Hibernate.STRING ) );
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registerFunction( "rawtohex", new StandardSQLFunction( "rawtohex" ) );
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registerFunction( "hextoraw", new StandardSQLFunction( "hextoraw" ) );
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registerFunction( "str", new SQLFunctionTemplate( Hibernate.STRING, "cast(?1 as varchar(24))" ) );
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registerFunction( "user", new NoArgSQLFunction( "user", Hibernate.STRING ) );
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registerFunction( "database", new NoArgSQLFunction( "database", Hibernate.STRING ) );
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registerFunction( "sysdate", new NoArgSQLFunction( "sysdate", Hibernate.DATE, false ) );
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registerFunction( "current_date", new NoArgSQLFunction( "current_date", Hibernate.DATE, false ) );
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registerFunction( "curdate", new NoArgSQLFunction( "curdate", Hibernate.DATE ) );
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registerFunction( "current_timestamp", new NoArgSQLFunction( "current_timestamp", Hibernate.TIMESTAMP, false ) );
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registerFunction(
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"current_timestamp", new NoArgSQLFunction( "current_timestamp", Hibernate.TIMESTAMP, false )
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);
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registerFunction( "now", new NoArgSQLFunction( "now", Hibernate.TIMESTAMP ) );
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registerFunction( "current_time", new NoArgSQLFunction( "current_time", Hibernate.TIME, false ) );
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registerFunction( "curtime", new NoArgSQLFunction( "curtime", Hibernate.TIME ) );
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@ -116,7 +156,7 @@ public class HSQLDialect extends Dialect {
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registerFunction( "month", new StandardSQLFunction( "month", Hibernate.INTEGER ) );
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registerFunction( "year", new StandardSQLFunction( "year", Hibernate.INTEGER ) );
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registerFunction( "week", new StandardSQLFunction( "week", Hibernate.INTEGER ) );
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registerFunction( "quater", new StandardSQLFunction( "quater", Hibernate.INTEGER ) );
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registerFunction( "quarter", new StandardSQLFunction( "quarter", Hibernate.INTEGER ) );
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registerFunction( "hour", new StandardSQLFunction( "hour", Hibernate.INTEGER ) );
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registerFunction( "minute", new StandardSQLFunction( "minute", Hibernate.INTEGER ) );
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registerFunction( "second", new StandardSQLFunction( "second", Hibernate.INTEGER ) );
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@ -173,7 +213,7 @@ public class HSQLDialect extends Dialect {
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}
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public String getIdentityInsertString() {
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return "null";
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return hsqldbVersion < 20 ? "null" : "default";
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}
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public boolean supportsLockTimeouts() {
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@ -193,14 +233,25 @@ public class HSQLDialect extends Dialect {
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}
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public String getLimitString(String sql, boolean hasOffset) {
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if ( hsqldbVersion < 20 ) {
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return new StringBuffer( sql.length() + 10 )
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.append( sql )
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.insert( sql.toLowerCase().indexOf( "select" ) + 6, hasOffset ? " limit ? ?" : " top ?" )
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.insert(
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sql.toLowerCase().indexOf( "select" ) + 6,
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hasOffset ? " limit ? ?" : " top ?"
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)
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.toString();
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}
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else {
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return new StringBuffer( sql.length() + 20 )
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.append( sql )
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.append( hasOffset ? " offset ? limit ?" : " limit ?" )
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.toString();
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}
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}
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public boolean bindLimitParametersFirst() {
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return true;
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return hsqldbVersion < 20;
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}
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public boolean supportsIfExistsAfterTableName() {
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@ -208,7 +259,7 @@ public class HSQLDialect extends Dialect {
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}
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public boolean supportsColumnCheck() {
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return false;
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return hsqldbVersion >= 20;
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}
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public boolean supportsSequences() {
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@ -241,10 +292,10 @@ public class HSQLDialect extends Dialect {
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}
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public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
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return EXTRACTER;
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return hsqldbVersion < 20 ? EXTRACTER_18 : EXTRACTER_20;
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}
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private static ViolatedConstraintNameExtracter EXTRACTER = new TemplatedViolatedConstraintNameExtracter() {
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private static ViolatedConstraintNameExtracter EXTRACTER_18 = new TemplatedViolatedConstraintNameExtracter() {
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/**
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* Extract the name of the violated constraint from the given SQLException.
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@ -274,40 +325,260 @@ public class HSQLDialect extends Dialect {
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}
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else if ( errorCode == -177 ) {
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constraintName = extractUsingTemplate(
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"Integrity constraint violation - no parent ", " table:", sqle.getMessage()
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"Integrity constraint violation - no parent ", " table:",
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sqle.getMessage()
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);
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}
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return constraintName;
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}
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};
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/**
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* HSQL does not really support temp tables; just take advantage of the
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* fact that it is a single user db...
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* HSQLDB 2.0 messages have changed
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* messages may be localized - therefore use the common, non-locale element " table: "
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*/
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private static ViolatedConstraintNameExtracter EXTRACTER_20 = new TemplatedViolatedConstraintNameExtracter() {
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public String extractConstraintName(SQLException sqle) {
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String constraintName = null;
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int errorCode = JDBCExceptionHelper.extractErrorCode( sqle );
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if ( errorCode == -8 ) {
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constraintName = extractUsingTemplate(
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"; ", " table: ", sqle.getMessage()
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);
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}
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else if ( errorCode == -9 ) {
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constraintName = extractUsingTemplate(
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"; ", " table: ", sqle.getMessage()
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);
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}
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else if ( errorCode == -104 ) {
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constraintName = extractUsingTemplate(
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"; ", " table: ", sqle.getMessage()
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);
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}
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else if ( errorCode == -177 ) {
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constraintName = extractUsingTemplate(
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"; ", " table: ", sqle.getMessage()
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);
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}
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return constraintName;
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}
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};
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public String getSelectClauseNullString(int sqlType) {
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String literal;
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switch ( sqlType ) {
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case Types.VARCHAR:
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case Types.CHAR:
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literal = "cast(null as varchar(100))";
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break;
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case Types.DATE:
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literal = "cast(null as date)";
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break;
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case Types.TIMESTAMP:
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literal = "cast(null as timestamp)";
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break;
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case Types.TIME:
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literal = "cast(null as time)";
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break;
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default:
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literal = "cast(null as int)";
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}
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return literal;
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}
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// temporary table support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Hibernate uses this information for temporary tables that it uses for its own operations
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// therefore the appropriate strategy is taken with different versions of HSQLDB
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// All versions of HSQLDB support GLOBAL TEMPORARY tables where the table
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// definition is shared by all users but data is private to the session
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// HSQLDB 2.0 also supports session-based LOCAL TEMPORARY tables where
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// the definition and data is private to the session and table declaration
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// can happen in the middle of a transaction
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/**
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* Does this dialect support temporary tables?
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*
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* @return True if temp tables are supported; false otherwise.
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*/
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public boolean supportsTemporaryTables() {
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return true;
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}
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/**
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* With HSQLDB 2.0, the table name is qualified with MODULE to assist the drop
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* statement (in-case there is a global name beginning with HT_)
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*
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* @param baseTableName The table name from which to base the temp table name.
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*
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* @return The generated temp table name.
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*/
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public String generateTemporaryTableName(String baseTableName) {
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if ( hsqldbVersion < 20 ) {
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return "HT_" + baseTableName;
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}
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else {
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return "MODULE.HT_" + baseTableName;
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}
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}
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/**
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* Command used to create a temporary table.
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*
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* @return The command used to create a temporary table.
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*/
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public String getCreateTemporaryTableString() {
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if ( hsqldbVersion < 20 ) {
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return "create global temporary table";
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}
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else {
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return "declare local temporary table";
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}
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}
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/**
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* No fragment is needed if data is not needed beyond commit, otherwise
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* should add "on commit preserve rows"
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*
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* @return Any required postfix.
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*/
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public String getCreateTemporaryTablePostfix() {
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return "";
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}
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/**
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* Command used to drop a temporary table.
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*
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* @return The command used to drop a temporary table.
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*/
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public String getDropTemporaryTableString() {
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return "drop table";
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}
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/**
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* Different behaviour for GLOBAL TEMPORARY (1.8) and LOCAL TEMPORARY (2.0)
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* <p/>
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* Possible return values and their meanings:<ul>
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* <li>{@link Boolean#TRUE} - Unequivocally, perform the temporary table DDL
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* in isolation.</li>
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* <li>{@link Boolean#FALSE} - Unequivocally, do <b>not</b> perform the
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* temporary table DDL in isolation.</li>
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* <li><i>null</i> - defer to the JDBC driver response in regards to
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* {@link java.sql.DatabaseMetaData#dataDefinitionCausesTransactionCommit()}</li>
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* </ul>
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*
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* @return see the result matrix above.
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*/
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public Boolean performTemporaryTableDDLInIsolation() {
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if ( hsqldbVersion < 20 ) {
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return Boolean.TRUE;
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}
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else {
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return Boolean.FALSE;
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}
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}
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/**
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* Do we need to drop the temporary table after use?
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*
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* todo - clarify usage by Hibernate
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* Version 1.8 GLOBAL TEMPORARY table definitions persist beyond the end
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* of the session (data is cleared). If there are not too many such tables,
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* perhaps we can avoid dropping them and reuse the table next time?
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*
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* @return True if the table should be dropped.
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*/
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public boolean dropTemporaryTableAfterUse() {
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return true;
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}
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// current timestamp support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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/**
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* HSQLDB 1.8.x requires CALL CURRENT_TIMESTAMP but this should not
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* be treated as a callable statement. It is equivalent to
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* "select current_timestamp from dual" in some databases.
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* HSQLDB 2.0 also supports VALUES CURRENT_TIMESTAMP
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*
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* @return True if the current timestamp can be retrieved; false otherwise.
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*/
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public boolean supportsCurrentTimestampSelection() {
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return true;
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}
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/**
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* Should the value returned by {@link #getCurrentTimestampSelectString}
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* be treated as callable. Typically this indicates that JDBC escape
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* syntax is being used...
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*
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* @return True if the {@link #getCurrentTimestampSelectString} return
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* is callable; false otherwise.
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*/
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public boolean isCurrentTimestampSelectStringCallable() {
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return false;
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}
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public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
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// HSQLDB only supports READ_UNCOMMITTED transaction isolation
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if ( lockMode==LockMode.PESSIMISTIC_FORCE_INCREMENT) {
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return new PessimisticForceIncrementLockingStrategy( lockable, lockMode);
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/**
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* Retrieve the command used to retrieve the current timestamp from the
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* database.
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*
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* @return The command.
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*/
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public String getCurrentTimestampSelectString() {
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return "call current_timestamp";
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}
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else if ( lockMode==LockMode.OPTIMISTIC) {
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return new OptimisticLockingStrategy( lockable, lockMode);
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}
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else if ( lockMode==LockMode.OPTIMISTIC_FORCE_INCREMENT) {
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return new OptimisticForceIncrementLockingStrategy( lockable, lockMode);
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}
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return new ReadUncommittedLockingStrategy( lockable, lockMode );
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/**
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* The name of the database-specific SQL function for retrieving the
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* current timestamp.
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*
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* @return The function name.
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*/
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public String getCurrentTimestampSQLFunctionName() {
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// the standard SQL function name is current_timestamp...
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return "current_timestamp";
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}
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/**
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* For HSQLDB 2.0, this is a copy of the base class implementation.
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* For HSQLDB 1.8, only READ_UNCOMMITTED is supported.
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*
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* @param lockable The persister for the entity to be locked.
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* @param lockMode The type of lock to be acquired.
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*
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* @return The appropriate locking strategy.
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*
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* @since 3.2
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*/
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public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
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if ( lockMode == LockMode.PESSIMISTIC_FORCE_INCREMENT ) {
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return new PessimisticForceIncrementLockingStrategy( lockable, lockMode );
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}
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else if ( lockMode == LockMode.PESSIMISTIC_WRITE ) {
|
||||
return new PessimisticWriteSelectLockingStrategy( lockable, lockMode );
|
||||
}
|
||||
else if ( lockMode == LockMode.PESSIMISTIC_READ ) {
|
||||
return new PessimisticReadSelectLockingStrategy( lockable, lockMode );
|
||||
}
|
||||
else if ( lockMode == LockMode.OPTIMISTIC ) {
|
||||
return new OptimisticLockingStrategy( lockable, lockMode );
|
||||
}
|
||||
else if ( lockMode == LockMode.OPTIMISTIC_FORCE_INCREMENT ) {
|
||||
return new OptimisticForceIncrementLockingStrategy( lockable, lockMode );
|
||||
}
|
||||
|
||||
if ( hsqldbVersion < 20 ) {
|
||||
return new ReadUncommittedLockingStrategy( lockable, lockMode );
|
||||
}
|
||||
else {
|
||||
return new SelectLockingStrategy( lockable, lockMode );
|
||||
}
|
||||
}
|
||||
|
||||
public static class ReadUncommittedLockingStrategy extends SelectLockingStrategy {
|
||||
|
|
@ -324,18 +595,61 @@ public class HSQLDialect extends Dialect {
|
|||
}
|
||||
}
|
||||
|
||||
public boolean supportsCommentOn() {
|
||||
return true;
|
||||
}
|
||||
|
||||
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
@Override
|
||||
public boolean supportsEmptyInList() {
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* todo - needs usage clarification
|
||||
*
|
||||
* If the SELECT statement is always part of a UNION, then the type of
|
||||
* parameter is resolved by v. 2.0, but not v. 1.8 (assuming the other
|
||||
* SELECT in the UNION has a column reference in the same position and
|
||||
* can be type-resolved).
|
||||
*
|
||||
* On the other hand if the SELECT statement is isolated, all versions of
|
||||
* HSQLDB require casting for "select ? from .." to work.
|
||||
*
|
||||
* @return True if select clause parameter must be cast()ed
|
||||
*
|
||||
* @since 3.2
|
||||
*/
|
||||
public boolean requiresCastingOfParametersInSelectClause() {
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* For the underlying database, is READ_COMMITTED isolation implemented by
|
||||
* forcing readers to wait for write locks to be released?
|
||||
*
|
||||
* @return True if writers block readers to achieve READ_COMMITTED; false otherwise.
|
||||
*/
|
||||
public boolean doesReadCommittedCauseWritersToBlockReaders() {
|
||||
return hsqldbVersion >= 20;
|
||||
}
|
||||
|
||||
/**
|
||||
* For the underlying database, is REPEATABLE_READ isolation implemented by
|
||||
* forcing writers to wait for read locks to be released?
|
||||
*
|
||||
* @return True if readers block writers to achieve REPEATABLE_READ; false otherwise.
|
||||
*/
|
||||
public boolean doesRepeatableReadCauseReadersToBlockWriters() {
|
||||
return hsqldbVersion >= 20;
|
||||
}
|
||||
|
||||
|
||||
public boolean supportsLobValueChangePropogation() {
|
||||
return false;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean supportsTupleDistinctCounts() {
|
||||
return false;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -572,9 +572,13 @@
|
|||
</activation>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>hsqldb</groupId>
|
||||
<groupId>org.hsqldb</groupId>
|
||||
<artifactId>hsqldb</artifactId>
|
||||
<version>1.8.0.2</version>
|
||||
<version>1.8.0.10</version>
|
||||
<!--
|
||||
At the moment the JBoss Nexus repo cached version of this is screwed up :(
|
||||
<version>2.0.0</version>
|
||||
-->
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
|
|
|
|||
Loading…
Reference in New Issue