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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.dialect;
import java.sql.Types;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.function.NoArgSQLFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.type.StandardBasicTypes;
/**
* An SQL dialect for Ingres 9.2.
*
* Known limitations:
*
*
Only supports simple constants or columns on the left side of an IN, making (1,2,3) in (...) or (<subselect>) in (...) non-supported.
*
Supports only 39 digits in decimal.
*
Explicitly set USE_GET_GENERATED_KEYS property to false.
*
Perform string casts to varchar; removes space padding.
*
*
* @author Ian Booth
* @author Bruce Lunsford
* @author Max Rydahl Andersen
* @author Raymond Fan
*/
public class IngresDialect extends Dialect {
public IngresDialect() {
super();
registerColumnType( Types.BIT, "tinyint" );
registerColumnType( Types.TINYINT, "tinyint" );
registerColumnType( Types.SMALLINT, "smallint" );
registerColumnType( Types.INTEGER, "integer" );
registerColumnType( Types.BIGINT, "bigint" );
registerColumnType( Types.REAL, "real" );
registerColumnType( Types.FLOAT, "float" );
registerColumnType( Types.DOUBLE, "float" );
registerColumnType( Types.NUMERIC, "decimal($p, $s)" );
registerColumnType( Types.DECIMAL, "decimal($p, $s)" );
registerColumnType( Types.BINARY, 32000, "byte($l)" );
registerColumnType( Types.BINARY, "long byte" );
registerColumnType( Types.VARBINARY, 32000, "varbyte($l)" );
registerColumnType( Types.VARBINARY, "long byte" );
registerColumnType( Types.LONGVARBINARY, "long byte" );
registerColumnType( Types.CHAR, 32000, "char($l)" );
registerColumnType( Types.VARCHAR, 32000, "varchar($l)" );
registerColumnType( Types.VARCHAR, "long varchar" );
registerColumnType( Types.LONGVARCHAR, "long varchar" );
registerColumnType( Types.DATE, "date" );
registerColumnType( Types.TIME, "time with time zone" );
registerColumnType( Types.TIMESTAMP, "timestamp with time zone" );
registerColumnType( Types.BLOB, "blob" );
registerColumnType( Types.CLOB, "clob" );
registerFunction( "abs", new StandardSQLFunction( "abs" ) );
registerFunction( "atan", new StandardSQLFunction( "atan", StandardBasicTypes.DOUBLE ) );
registerFunction( "bit_add", new StandardSQLFunction( "bit_add" ) );
registerFunction( "bit_and", new StandardSQLFunction( "bit_and" ) );
registerFunction( "bit_length", new SQLFunctionTemplate( StandardBasicTypes.INTEGER, "octet_length(hex(?1))*4" ) );
registerFunction( "bit_not", new StandardSQLFunction( "bit_not" ) );
registerFunction( "bit_or", new StandardSQLFunction( "bit_or" ) );
registerFunction( "bit_xor", new StandardSQLFunction( "bit_xor" ) );
registerFunction( "character_length", new StandardSQLFunction( "character_length", StandardBasicTypes.LONG ) );
registerFunction( "charextract", new StandardSQLFunction( "charextract", StandardBasicTypes.STRING ) );
registerFunction( "concat", new VarArgsSQLFunction( StandardBasicTypes.STRING, "(", "+", ")" ) );
registerFunction( "cos", new StandardSQLFunction( "cos", StandardBasicTypes.DOUBLE ) );
registerFunction( "current_user", new NoArgSQLFunction( "current_user", StandardBasicTypes.STRING, false ) );
registerFunction( "current_time", new NoArgSQLFunction( "date('now')", StandardBasicTypes.TIMESTAMP, false ) );
registerFunction( "current_timestamp", new NoArgSQLFunction( "date('now')", StandardBasicTypes.TIMESTAMP, false ) );
registerFunction( "current_date", new NoArgSQLFunction( "date('now')", StandardBasicTypes.TIMESTAMP, false ) );
registerFunction( "date_trunc", new StandardSQLFunction( "date_trunc", StandardBasicTypes.TIMESTAMP ) );
registerFunction( "day", new StandardSQLFunction( "day", StandardBasicTypes.INTEGER ) );
registerFunction( "dba", new NoArgSQLFunction( "dba", StandardBasicTypes.STRING, true ) );
registerFunction( "dow", new StandardSQLFunction( "dow", StandardBasicTypes.STRING ) );
registerFunction( "extract", new SQLFunctionTemplate( StandardBasicTypes.INTEGER, "date_part('?1', ?3)" ) );
registerFunction( "exp", new StandardSQLFunction( "exp", StandardBasicTypes.DOUBLE ) );
registerFunction( "gmt_timestamp", new StandardSQLFunction( "gmt_timestamp", StandardBasicTypes.STRING ) );
registerFunction( "hash", new StandardSQLFunction( "hash", StandardBasicTypes.INTEGER ) );
registerFunction( "hex", new StandardSQLFunction( "hex", StandardBasicTypes.STRING ) );
registerFunction( "hour", new StandardSQLFunction( "hour", StandardBasicTypes.INTEGER ) );
registerFunction( "initial_user", new NoArgSQLFunction( "initial_user", StandardBasicTypes.STRING, false ) );
registerFunction( "intextract", new StandardSQLFunction( "intextract", StandardBasicTypes.INTEGER ) );
registerFunction( "left", new StandardSQLFunction( "left", StandardBasicTypes.STRING ) );
registerFunction( "locate", new SQLFunctionTemplate( StandardBasicTypes.LONG, "locate(?1, ?2)" ) );
registerFunction( "length", new StandardSQLFunction( "length", StandardBasicTypes.LONG ) );
registerFunction( "ln", new StandardSQLFunction( "ln", StandardBasicTypes.DOUBLE ) );
registerFunction( "log", new StandardSQLFunction( "log", StandardBasicTypes.DOUBLE ) );
registerFunction( "lower", new StandardSQLFunction( "lower" ) );
registerFunction( "lowercase", new StandardSQLFunction( "lowercase" ) );
registerFunction( "minute", new StandardSQLFunction( "minute", StandardBasicTypes.INTEGER ) );
registerFunction( "month", new StandardSQLFunction( "month", StandardBasicTypes.INTEGER ) );
registerFunction( "octet_length", new StandardSQLFunction( "octet_length", StandardBasicTypes.LONG ) );
registerFunction( "pad", new StandardSQLFunction( "pad", StandardBasicTypes.STRING ) );
registerFunction( "position", new StandardSQLFunction( "position", StandardBasicTypes.LONG ) );
registerFunction( "power", new StandardSQLFunction( "power", StandardBasicTypes.DOUBLE ) );
registerFunction( "random", new NoArgSQLFunction( "random", StandardBasicTypes.LONG, true ) );
registerFunction( "randomf", new NoArgSQLFunction( "randomf", StandardBasicTypes.DOUBLE, true ) );
registerFunction( "right", new StandardSQLFunction( "right", StandardBasicTypes.STRING ) );
registerFunction( "session_user", new NoArgSQLFunction( "session_user", StandardBasicTypes.STRING, false ) );
registerFunction( "second", new StandardSQLFunction( "second", StandardBasicTypes.INTEGER ) );
registerFunction( "size", new NoArgSQLFunction( "size", StandardBasicTypes.LONG, true ) );
registerFunction( "squeeze", new StandardSQLFunction( "squeeze" ) );
registerFunction( "sin", new StandardSQLFunction( "sin", StandardBasicTypes.DOUBLE ) );
registerFunction( "soundex", new StandardSQLFunction( "soundex", StandardBasicTypes.STRING ) );
registerFunction( "sqrt", new StandardSQLFunction( "sqrt", StandardBasicTypes.DOUBLE ) );
registerFunction( "substring", new SQLFunctionTemplate( StandardBasicTypes.STRING, "substring(?1 FROM ?2 FOR ?3)" ) );
registerFunction( "system_user", new NoArgSQLFunction( "system_user", StandardBasicTypes.STRING, false ) );
//registerFunction( "trim", new StandardSQLFunction( "trim", StandardBasicTypes.STRING ) );
registerFunction( "unhex", new StandardSQLFunction( "unhex", StandardBasicTypes.STRING ) );
registerFunction( "upper", new StandardSQLFunction( "upper" ) );
registerFunction( "uppercase", new StandardSQLFunction( "uppercase" ) );
registerFunction( "user", new NoArgSQLFunction( "user", StandardBasicTypes.STRING, false ) );
registerFunction( "usercode", new NoArgSQLFunction( "usercode", StandardBasicTypes.STRING, true ) );
registerFunction( "username", new NoArgSQLFunction( "username", StandardBasicTypes.STRING, true ) );
registerFunction( "uuid_create", new StandardSQLFunction( "uuid_create", StandardBasicTypes.BYTE ) );
registerFunction( "uuid_compare", new StandardSQLFunction( "uuid_compare", StandardBasicTypes.INTEGER ) );
registerFunction( "uuid_from_char", new StandardSQLFunction( "uuid_from_char", StandardBasicTypes.BYTE ) );
registerFunction( "uuid_to_char", new StandardSQLFunction( "uuid_to_char", StandardBasicTypes.STRING ) );
registerFunction( "year", new StandardSQLFunction( "year", StandardBasicTypes.INTEGER ) );
// Casting to char of numeric values introduces space padding up to the
// maximum width of a value for that return type. Casting to varchar
// does not introduce space padding.
registerFunction( "str", new SQLFunctionTemplate(StandardBasicTypes.STRING, "cast(?1 as varchar)") );
// Ingres driver supports getGeneratedKeys but only in the following
// form:
// The Ingres DBMS returns only a single table key or a single object
// key per insert statement. Ingres does not return table and object
// keys for INSERT AS SELECT statements. Depending on the keys that are
// produced by the statement executed, auto-generated key parameters in
// execute(), executeUpdate(), and prepareStatement() methods are
// ignored and getGeneratedKeys() returns a result-set containing no
// rows, a single row with one column, or a single row with two columns.
// Ingres JDBC Driver returns table and object keys as BINARY values.
getDefaultProperties().setProperty(Environment.USE_GET_GENERATED_KEYS, "false");
// There is no support for a native boolean type that accepts values
// of true, false or unknown. Using the tinyint type requires
// substitions of true and false.
getDefaultProperties().setProperty(Environment.QUERY_SUBSTITUTIONS, "true=1,false=0");
}
/**
* Expression for created UUID string
*/
public String getSelectGUIDString() {
return "select uuid_to_char(uuid_create())";
}
/**
* Do we need to drop constraints before dropping tables in this dialect?
*
* @return boolean
*/
public boolean dropConstraints() {
return false;
}
/**
* Does this dialect support FOR UPDATE OF, allowing
* particular rows to be locked?
*
* @return True (Ingres does support "for update of" syntax...)
*/
public boolean supportsForUpdateOf() {
return true;
}
/**
* The syntax used to add a column to a table (optional).
*/
public String getAddColumnString() {
return "add column";
}
/**
* The keyword used to specify a nullable column.
*
* @return String
*/
public String getNullColumnString() {
return " with null";
}
/**
* Does this dialect support sequences?
*
* @return boolean
*/
public boolean supportsSequences() {
return true;
}
/**
* The syntax that fetches the next value of a sequence, if sequences are supported.
*
* @param sequenceName the name of the sequence
*
* @return String
*/
public String getSequenceNextValString(String sequenceName) {
return "select nextval for " + sequenceName;
}
public String getSelectSequenceNextValString(String sequenceName) {
return sequenceName + ".nextval";
}
/**
* The syntax used to create a sequence, if sequences are supported.
*
* @param sequenceName the name of the sequence
*
* @return String
*/
public String getCreateSequenceString(String sequenceName) {
return "create sequence " + sequenceName;
}
/**
* The syntax used to drop a sequence, if sequences are supported.
*
* @param sequenceName the name of the sequence
*
* @return String
*/
public String getDropSequenceString(String sequenceName) {
return "drop sequence " + sequenceName + " restrict";
}
/**
* A query used to find all sequences
*/
public String getQuerySequencesString() {
return "select seq_name from iisequence";
}
/**
* The name of the SQL function that transforms a string to
* lowercase
*
* @return String
*/
public String getLowercaseFunction() {
return "lowercase";
}
/**
* Does this Dialect have some kind of LIMIT syntax?
*/
public boolean supportsLimit() {
return true;
}
/**
* Does this dialect support an offset?
*/
public boolean supportsLimitOffset() {
return false;
}
/**
* Add a LIMIT clause to the given SQL SELECT
*
* @return the modified SQL
*/
public String getLimitString(String querySelect, int offset, int limit) {
if ( offset > 0 ) {
throw new UnsupportedOperationException( "query result offset is not supported" );
}
return new StringBuilder( querySelect.length() + 16 )
.append( querySelect )
.insert( 6, " first " + limit )
.toString();
}
public boolean supportsVariableLimit() {
return false;
}
/**
* Does the LIMIT clause take a "maximum" row number instead
* of a total number of returned rows?
*/
public boolean useMaxForLimit() {
return true;
}
/**
* Does this dialect support temporary tables?
*/
public boolean supportsTemporaryTables() {
return true;
}
public String getCreateTemporaryTableString() {
return "declare global temporary table";
}
public String getCreateTemporaryTablePostfix() {
return "on commit preserve rows with norecovery";
}
public String generateTemporaryTableName(String baseTableName) {
return "session." + super.generateTemporaryTableName( baseTableName );
}
/**
* Expression for current_timestamp
*/
public String getCurrentTimestampSQLFunctionName() {
return "date(now)";
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsSubselectAsInPredicateLHS() {
return false;
}
public boolean supportsEmptyInList() {
return false;
}
public boolean supportsExpectedLobUsagePattern () {
return false;
}
/**
* Ingres does not support the syntax `count(distinct a,b)`?
*
* @return False, not supported.
*/
public boolean supportsTupleDistinctCounts() {
return false;
}
}
