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H2Dialect.javaAPI DocHibernate 3.2.514402Thu Mar 15 04:33:16 GMT 2007org.hibernate.dialect

H2Dialect

public class H2Dialect extends Dialect
A dialect compatible with the H2 database.
author
Thomas Mueller

Fields Summary
private String
querySequenceString
private static org.hibernate.exception.ViolatedConstraintNameExtracter
EXTRACTER
Constructors Summary
public H2Dialect()

        super();
               
        querySequenceString = "select sequence_name from information_schema.sequences";
        try {
        	// HHH-2300
            Class constants = ReflectHelper.classForName( "org.h2.engine.Constants" );
            Integer build = (Integer)constants.getDeclaredField("BUILD_ID" ).get(null);
            int buildid = build.intValue();
            if(buildid < 32) {
                querySequenceString = "select name from information_schema.sequences";
            }
        } catch(Throwable e) {
            // ignore (probably H2 not in the classpath)
        }
        registerColumnType(Types.BOOLEAN, "boolean");
        registerColumnType(Types.BIGINT, "bigint");
        registerColumnType(Types.BINARY, "binary");
        registerColumnType(Types.BIT, "bit");
        registerColumnType(Types.CHAR, "char($l)");
        registerColumnType(Types.DATE, "date");
        registerColumnType(Types.DECIMAL, "decimal($p,$s)");
        registerColumnType(Types.DOUBLE, "double");
        registerColumnType(Types.FLOAT, "float");
        registerColumnType(Types.INTEGER, "integer");
        registerColumnType(Types.LONGVARBINARY, "longvarbinary");
        registerColumnType(Types.LONGVARCHAR, "longvarchar");
        registerColumnType(Types.REAL, "real");        
        registerColumnType(Types.SMALLINT, "smallint");
        registerColumnType(Types.TINYINT, "tinyint");
        registerColumnType(Types.TIME, "time");
        registerColumnType(Types.TIMESTAMP, "timestamp");
        registerColumnType(Types.VARCHAR, "varchar($l)");
        registerColumnType(Types.VARBINARY, "binary($l)");
        registerColumnType(Types.NUMERIC, "numeric");
        registerColumnType(Types.BLOB, "blob");
        registerColumnType(Types.CLOB, "clob");
        
        // select topic, syntax from information_schema.help
        // where section like 'Function%' order by section, topic

//        registerFunction("abs", new StandardSQLFunction("abs"));
        registerFunction("acos", new StandardSQLFunction("acos", Hibernate.DOUBLE));
        registerFunction("asin", new StandardSQLFunction("asin", Hibernate.DOUBLE));
        registerFunction("atan", new StandardSQLFunction("atan", Hibernate.DOUBLE));
        registerFunction("atan2", new StandardSQLFunction("atan2", Hibernate.DOUBLE));
        registerFunction("bitand", new StandardSQLFunction("bitand", Hibernate.INTEGER));
        registerFunction("bitor", new StandardSQLFunction("bitor", Hibernate.INTEGER));
        registerFunction("bitxor", new StandardSQLFunction("bitxor", Hibernate.INTEGER));
        registerFunction("ceiling", new StandardSQLFunction("ceiling", Hibernate.DOUBLE));
        registerFunction("cos", new StandardSQLFunction("cos", Hibernate.DOUBLE));
        registerFunction("cot", new StandardSQLFunction("cot", Hibernate.DOUBLE));
        registerFunction("degrees", new StandardSQLFunction("degrees", Hibernate.DOUBLE));
        registerFunction("exp", new StandardSQLFunction("exp", Hibernate.DOUBLE));
        registerFunction("floor", new StandardSQLFunction("floor", Hibernate.DOUBLE));
        registerFunction("log", new StandardSQLFunction("log", Hibernate.DOUBLE));
        registerFunction("log10", new StandardSQLFunction("log10", Hibernate.DOUBLE));
//        registerFunction("mod", new StandardSQLFunction("mod", Hibernate.INTEGER));
        registerFunction("pi", new NoArgSQLFunction("pi", Hibernate.DOUBLE));
        registerFunction("power", new StandardSQLFunction("power", Hibernate.DOUBLE));
        registerFunction("radians", new StandardSQLFunction("radians", Hibernate.DOUBLE));
        registerFunction("rand", new NoArgSQLFunction("rand", Hibernate.DOUBLE));
        registerFunction("round", new StandardSQLFunction("round", Hibernate.DOUBLE));
        registerFunction("roundmagic", new StandardSQLFunction("roundmagic", Hibernate.DOUBLE));
        registerFunction("sign", new StandardSQLFunction("sign", Hibernate.INTEGER));
        registerFunction("sin", new StandardSQLFunction("sin", Hibernate.DOUBLE));
//        registerFunction("sqrt", new StandardSQLFunction("sqrt", Hibernate.DOUBLE));
        registerFunction("tan", new StandardSQLFunction("tan", Hibernate.DOUBLE));
        registerFunction("truncate", new StandardSQLFunction("truncate", Hibernate.DOUBLE));

        registerFunction("compress", new StandardSQLFunction("compress", Hibernate.BINARY));
        registerFunction("expand", new StandardSQLFunction("compress", Hibernate.BINARY));
        registerFunction("decrypt", new StandardSQLFunction("decrypt", Hibernate.BINARY));
        registerFunction("encrypt", new StandardSQLFunction("encrypt", Hibernate.BINARY));
        registerFunction("hash", new StandardSQLFunction("hash", Hibernate.BINARY));

        registerFunction("ascii", new StandardSQLFunction("ascii", Hibernate.INTEGER));
//        registerFunction("bit_length", new StandardSQLFunction("bit_length", Hibernate.INTEGER));
        registerFunction("char", new StandardSQLFunction("char", Hibernate.CHARACTER));
        registerFunction("concat", new VarArgsSQLFunction(Hibernate.STRING, "(", "||", ")"));
        registerFunction("difference", new StandardSQLFunction("difference", Hibernate.INTEGER));
        registerFunction("hextoraw", new StandardSQLFunction("hextoraw", Hibernate.STRING));
        registerFunction("lower", new StandardSQLFunction("lower", Hibernate.STRING));
        registerFunction("insert", new StandardSQLFunction("lower", Hibernate.STRING));
        registerFunction("left", new StandardSQLFunction("left", Hibernate.STRING));
//        registerFunction("length", new StandardSQLFunction("length", Hibernate.INTEGER));
//        registerFunction("locate", new StandardSQLFunction("locate", Hibernate.INTEGER));
//        registerFunction("lower", new StandardSQLFunction("lower", Hibernate.STRING));
        registerFunction("lcase", new StandardSQLFunction("lcase", Hibernate.STRING));
        registerFunction("ltrim", new StandardSQLFunction("ltrim", Hibernate.STRING));
        registerFunction("octet_length", new StandardSQLFunction("octet_length", Hibernate.INTEGER));
        registerFunction("position", new StandardSQLFunction("position", Hibernate.INTEGER));
        registerFunction("rawtohex", new StandardSQLFunction("rawtohex", Hibernate.STRING));
        registerFunction("repeat", new StandardSQLFunction("repeat", Hibernate.STRING));
        registerFunction("replace", new StandardSQLFunction("replace", Hibernate.STRING));
        registerFunction("right", new StandardSQLFunction("right", Hibernate.STRING));
        registerFunction("rtrim", new StandardSQLFunction("rtrim", Hibernate.STRING));
        registerFunction("soundex", new StandardSQLFunction("soundex", Hibernate.STRING));
        registerFunction("space", new StandardSQLFunction("space", Hibernate.STRING));
        registerFunction("stringencode", new StandardSQLFunction("stringencode", Hibernate.STRING));
        registerFunction("stringdecode", new StandardSQLFunction("stringdecode", Hibernate.STRING));
//        registerFunction("substring", new StandardSQLFunction("substring", Hibernate.STRING));
//        registerFunction("upper", new StandardSQLFunction("upper", Hibernate.STRING));
        registerFunction("ucase", new StandardSQLFunction("ucase", Hibernate.STRING));

        registerFunction("stringtoutf8", new StandardSQLFunction("stringtoutf8", Hibernate.BINARY));
        registerFunction("utf8tostring", new StandardSQLFunction("utf8tostring", Hibernate.STRING));

        registerFunction("current_date", new NoArgSQLFunction("current_date", Hibernate.DATE));
        registerFunction("current_time", new NoArgSQLFunction("current_time", Hibernate.TIME));
        registerFunction("current_timestamp", new NoArgSQLFunction("current_timestamp", Hibernate.TIMESTAMP));
        registerFunction("datediff", new NoArgSQLFunction("datediff", Hibernate.INTEGER));
        registerFunction("dayname", new StandardSQLFunction("dayname", Hibernate.STRING));
        registerFunction("dayofmonth", new StandardSQLFunction("dayofmonth", Hibernate.INTEGER));
        registerFunction("dayofweek", new StandardSQLFunction("dayofweek", Hibernate.INTEGER));
        registerFunction("dayofyear", new StandardSQLFunction("dayofyear", Hibernate.INTEGER));
//        registerFunction("hour", new StandardSQLFunction("hour", Hibernate.INTEGER));
//        registerFunction("minute", new StandardSQLFunction("minute", Hibernate.INTEGER));
//        registerFunction("month", new StandardSQLFunction("month", Hibernate.INTEGER));
        registerFunction("monthname", new StandardSQLFunction("monthname", Hibernate.STRING));
        registerFunction("quater", new StandardSQLFunction("quater", Hibernate.INTEGER));
//        registerFunction("second", new StandardSQLFunction("second", Hibernate.INTEGER));
        registerFunction("week", new StandardSQLFunction("week", Hibernate.INTEGER));
//        registerFunction("year", new StandardSQLFunction("year", Hibernate.INTEGER));

        registerFunction("curdate", new NoArgSQLFunction("curdate", Hibernate.DATE));
        registerFunction("curtime", new NoArgSQLFunction("curtime", Hibernate.TIME));
        registerFunction("curtimestamp", new NoArgSQLFunction("curtimestamp", Hibernate.TIME));
        registerFunction("now", new NoArgSQLFunction("now", Hibernate.TIMESTAMP));

        registerFunction("database", new NoArgSQLFunction("database", Hibernate.STRING));
        registerFunction("user", new NoArgSQLFunction("user", Hibernate.STRING));

        getDefaultProperties().setProperty(Environment.STATEMENT_BATCH_SIZE, DEFAULT_BATCH_SIZE);
Methods Summary
public booleanbindLimitParametersFirst()

        return false;
public booleanbindLimitParametersInReverseOrder()

        return true;
public java.lang.StringgetAddColumnString()

        return "add column";
protected java.lang.StringgetCreateSequenceString(java.lang.String sequenceName)

		return "create sequence " + sequenceName;
public java.lang.StringgetCreateTemporaryTableString()

        return "create temporary table if not exists";
public java.lang.StringgetCurrentTimestampSelectString()

        return "call current_timestamp()";
protected java.lang.StringgetDropSequenceString(java.lang.String sequenceName)

		return "drop sequence " + sequenceName;
public java.lang.StringgetForUpdateString()

        return " for update";
public java.lang.StringgetIdentityColumnString()

        return "generated by default as identity"; // not null is implicit
public java.lang.StringgetIdentityInsertString()

        return "null";
public java.lang.StringgetIdentitySelectString()

        return "call identity()";
public java.lang.StringgetLimitString(java.lang.String sql, boolean hasOffset)

        return new StringBuffer(sql.length() + 20).
            append(sql).
            append(hasOffset ? " limit ? offset ?" : " limit ?").
            toString();
public java.lang.StringgetQuerySequencesString()

        return querySequenceString;
public java.lang.StringgetSelectSequenceNextValString(java.lang.String sequenceName)

        return "next value for " + sequenceName;
public java.lang.StringgetSequenceNextValString(java.lang.String sequenceName)

        return "call next value for " + sequenceName;
public org.hibernate.exception.ViolatedConstraintNameExtractergetViolatedConstraintNameExtracter()

        return EXTRACTER;
public booleanisCurrentTimestampSelectStringCallable()

        return false;
public booleansupportsCurrentTimestampSelection()

        return true;
public booleansupportsIdentityColumns()

        return true;
public booleansupportsIfExistsAfterTableName()

        return true;
public booleansupportsLimit()

        return true;
public booleansupportsLobValueChangePropogation()

		return false;
public booleansupportsPooledSequences()

		return true;
public booleansupportsSequences()

        return true;
public booleansupportsTemporaryTables()


       
        return true;
public booleansupportsUnionAll()

        return true;
public booleansupportsUnique()

        return true;