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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; } }




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