package org.hibernate.dialect;
import java.sql.SQLException;
import java.sql.Types;
import org.hibernate.Hibernate;
import org.hibernate.MappingException;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.function.NoArgSQLFunction;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.exception.TemplatedViolatedConstraintNameExtracter;
import org.hibernate.exception.ViolatedConstraintNameExtracter;
import org.hibernate.util.ReflectHelper;
/**
* A dialect compatible with the H2 database.
*
* @author Thomas Mueller
*
*/
public class H2Dialect extends Dialect {
private String querySequenceString;
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);
}
public String getAddColumnString() {
return "add column";
}
public boolean supportsIdentityColumns() {
return true;
}
public String getIdentityColumnString() {
return "generated by default as identity"; // not null is implicit
}
public String getIdentitySelectString() {
return "call identity()";
}
public String getIdentityInsertString() {
return "null";
}
public String getForUpdateString() {
return " for update";
}
public boolean supportsUnique() {
return true;
}
public boolean supportsLimit() {
return true;
}
public String getLimitString(String sql, boolean hasOffset) {
return new StringBuffer(sql.length() + 20).
append(sql).
append(hasOffset ? " limit ? offset ?" : " limit ?").
toString();
}
public boolean bindLimitParametersInReverseOrder() {
return true;
}
public boolean bindLimitParametersFirst() {
return false;
}
public boolean supportsIfExistsAfterTableName() {
return true;
}
public boolean supportsPooledSequences() {
return true;
}
protected String getCreateSequenceString(String sequenceName) throws MappingException {
return "create sequence " + sequenceName;
}
protected String getDropSequenceString(String sequenceName) throws MappingException {
return "drop sequence " + sequenceName;
}
public String getSelectSequenceNextValString(String sequenceName) {
return "next value for " + sequenceName;
}
public String getSequenceNextValString(String sequenceName) {
return "call next value for " + sequenceName;
}
public String getQuerySequencesString() {
return querySequenceString;
}
public boolean supportsSequences() {
return true;
}
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
return EXTRACTER;
}
private static ViolatedConstraintNameExtracter EXTRACTER = new TemplatedViolatedConstraintNameExtracter() {
/**
* Extract the name of the violated constraint from the given SQLException.
*
* @param sqle The exception that was the result of the constraint violation.
* @return The extracted constraint name.
*/
public String extractConstraintName(SQLException sqle) {
String constraintName = null;
// 23000: Check constraint violation: {0}
// 23001: Unique index or primary key violation: {0}
if(sqle.getSQLState().startsWith("23")) {
String message = sqle.getMessage();
int idx = message.indexOf("violation: ");
if(idx > 0) {
constraintName = message.substring(idx + "violation: ".length());
}
}
return constraintName;
}
};
public boolean supportsTemporaryTables() {
return true;
}
public String getCreateTemporaryTableString() {
return "create temporary table if not exists";
}
public boolean supportsCurrentTimestampSelection() {
return true;
}
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
public String getCurrentTimestampSelectString() {
return "call current_timestamp()";
}
public boolean supportsUnionAll() {
return true;
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsLobValueChangePropogation() {
return false;
}
}
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