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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.dialect;
import java.sql.Types;
import org.hibernate.LockMode;
import org.hibernate.metamodel.model.domain.spi.Lockable;
import org.hibernate.query.sqm.produce.function.SqmFunctionRegistry;
import org.hibernate.dialect.lock.LockingStrategy;
import org.hibernate.dialect.lock.OptimisticForceIncrementLockingStrategy;
import org.hibernate.dialect.lock.OptimisticLockingStrategy;
import org.hibernate.dialect.lock.PessimisticForceIncrementLockingStrategy;
import org.hibernate.dialect.lock.PessimisticReadUpdateLockingStrategy;
import org.hibernate.dialect.lock.PessimisticWriteUpdateLockingStrategy;
import org.hibernate.dialect.lock.SelectLockingStrategy;
import org.hibernate.dialect.lock.UpdateLockingStrategy;
import org.hibernate.dialect.pagination.AbstractLimitHandler;
import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.dialect.pagination.LimitHelper;
import org.hibernate.engine.spi.RowSelection;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.sql.CaseFragment;
import org.hibernate.sql.DecodeCaseFragment;
import org.hibernate.type.spi.StandardSpiBasicTypes;
import org.jboss.logging.Logger;
/**
* This is the Hibernate dialect for the Unisys 2200 Relational Database (RDMS).
* This dialect was developed for use with Hibernate 3.0.5. Other versions may
* require modifications to the dialect.
*
* Version History:
* Also change the version displayed below in the constructor
* 1.1
* 1.0 2005-10-24 CDH - First dated version for use with CP 11
*
* @author Ploski and Hanson
*/
@SuppressWarnings("deprecation")
public class RDMSOS2200Dialect extends Dialect {
private static final CoreMessageLogger LOG = Logger.getMessageLogger(
CoreMessageLogger.class,
RDMSOS2200Dialect.class.getName()
);
private static final AbstractLimitHandler LIMIT_HANDLER = new AbstractLimitHandler() {
@Override
public String processSql(String sql, RowSelection selection) {
final boolean hasOffset = LimitHelper.hasFirstRow( selection );
if (hasOffset) {
throw new UnsupportedOperationException( "query result offset is not supported" );
}
return sql + " fetch first " + getMaxOrLimit( selection ) + " rows only ";
}
@Override
public boolean supportsLimit() {
return true;
}
@Override
public boolean supportsLimitOffset() {
return false;
}
@Override
public boolean supportsVariableLimit() {
return false;
}
};
private static final AbstractLimitHandler LEGACY_LIMIT_HANDLER = new AbstractLimitHandler() {
@Override
public String processSql(String sql, RowSelection selection) {
return sql + " fetch first " + getMaxOrLimit( selection ) + " rows only ";
}
@Override
public boolean supportsLimit() {
return true;
}
@Override
public boolean supportsLimitOffset() {
return false;
}
@Override
public boolean supportsVariableLimit() {
return false;
}
};
/**
* Constructs a RDMSOS2200Dialect
*/
public RDMSOS2200Dialect() {
super();
// Display the dialect version.
LOG.rdmsOs2200Dialect();
/**
* For a list of column types to register, see section A-1
* in 7862 7395, the Unisys JDBC manual.
*
* Here are column sizes as documented in Table A-1 of
* 7831 0760, "Enterprise Relational Database Server
* for ClearPath OS2200 Administration Guide"
* Numeric - 21
* Decimal - 22 (21 digits plus one for sign)
* Float - 60 bits
* Char - 28000
* NChar - 14000
* BLOB+ - 4294967296 (4 Gb)
* + RDMS JDBC driver does not support BLOBs
*
* DATE, TIME and TIMESTAMP literal formats are
* are all described in section 2.3.4 DATE Literal Format
* in 7830 8160.
* The DATE literal format is: YYYY-MM-DD
* The TIME literal format is: HH:MM:SS[.[FFFFFF]]
* The TIMESTAMP literal format is: YYYY-MM-DD HH:MM:SS[.[FFFFFF]]
*
* Note that $l (dollar-L) will use the length value if provided.
* Also new for Hibernate3 is the $p percision and $s (scale) parameters
*/
registerColumnType( Types.BIT, "SMALLINT" );
registerColumnType( Types.TINYINT, "SMALLINT" );
registerColumnType( Types.BIGINT, "NUMERIC(21,0)" );
registerColumnType( Types.SMALLINT, "SMALLINT" );
registerColumnType( Types.CHAR, "CHARACTER(1)" );
registerColumnType( Types.DOUBLE, "DOUBLE PRECISION" );
registerColumnType( Types.FLOAT, "FLOAT" );
registerColumnType( Types.REAL, "REAL" );
registerColumnType( Types.INTEGER, "INTEGER" );
registerColumnType( Types.NUMERIC, "NUMERIC(21,$l)" );
registerColumnType( Types.DECIMAL, "NUMERIC(21,$l)" );
registerColumnType( Types.DATE, "DATE" );
registerColumnType( Types.TIME, "TIME" );
registerColumnType( Types.TIMESTAMP, "TIMESTAMP" );
registerColumnType( Types.VARCHAR, "CHARACTER($l)" );
registerColumnType( Types.BLOB, "BLOB($l)" );
/*
* The following types are not supported in RDMS/JDBC and therefore commented out.
* However, in some cases, mapping them to CHARACTER columns works
* for many applications, but does not work for all cases.
*/
// registerColumnType(Types.VARBINARY, "CHARACTER($l)");
// registerColumnType(Types.BLOB, "CHARACTER($l)" ); // For use prior to CP 11.0
// registerColumnType(Types.CLOB, "CHARACTER($l)" );
}
@Override
public void initializeFunctionRegistry(SqmFunctionRegistry registry) {
super.initializeFunctionRegistry( registry );
/**
* This section registers RDMS Built-in Functions (BIFs) with Hibernate.
* The first parameter is the 'register' function name with Hibernate.
* The second parameter is the defined RDMS SQL Function and it's
* characteristics. If StandardSQLFunction(...) is used, the RDMS BIF
* name and the return type (if any) is specified. If
* SQLFunctionTemplate(...) is used, the return type and a template
* string is provided, plus an optional hasParenthesesIfNoArgs flag.
*/
registry.registerNamed( "abs" );
registry.registerNamed( "sign", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "ascii", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "char_length", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "character_length", StandardSpiBasicTypes.INTEGER );
// The RDMS concat() function only supports 2 parameters
registry.registerPattern( "concat", "concat(?1, ?2)", StandardSpiBasicTypes.STRING );
registry.registerNamed( "instr", StandardSpiBasicTypes.STRING );
registry.registerNamed( "lpad", StandardSpiBasicTypes.STRING );
registry.registerNamed( "replace", StandardSpiBasicTypes.STRING );
registry.registerNamed( "rpad", StandardSpiBasicTypes.STRING );
registry.registerNamed( "substr", StandardSpiBasicTypes.STRING );
registry.registerNamed( "lcase" );
registry.registerNamed( "lower" );
registry.registerNamed( "ltrim" );
registry.registerNamed( "reverse" );
registry.registerNamed( "rtrim" );
// RDMS does not directly support the trim() function, we use rtrim() and ltrim()
registry.registerPattern( "trim", "ltrim(rtrim(?1))", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "soundex" );
registry.registerNamed( "space", StandardSpiBasicTypes.STRING );
registry.registerNamed( "ucase" );
registry.registerNamed( "upper" );
registry.registerNamed( "acos", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "asin", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "atan", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "cos", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "cosh", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "cot", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "exp", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "ln", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "log", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "log10", StandardSpiBasicTypes.DOUBLE );
registry.registerNoArgs( "pi", StandardSpiBasicTypes.DOUBLE );
registry.registerNoArgs( "rand", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "sin", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "sinh", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "sqrt", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "tan", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "tanh", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "round" );
registry.registerNamed( "trunc" );
registry.registerNamed( "ceil" );
registry.registerNamed( "floor" );
registry.registerNamed( "chr", StandardSpiBasicTypes.CHARACTER );
registry.registerNamed( "initcap" );
registry.registerNoArgs( "user", StandardSpiBasicTypes.STRING );
registry.registerNoArgs( "current_date", StandardSpiBasicTypes.DATE );
registry.registerNoArgs( "current_time", StandardSpiBasicTypes.TIME );
registry.registerNoArgs( "current_timestamp", StandardSpiBasicTypes.TIMESTAMP );
registry.registerNoArgs( "curdate", StandardSpiBasicTypes.DATE );
registry.registerNoArgs( "curtime", StandardSpiBasicTypes.TIME );
registry.registerNamed( "days", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "dayofmonth", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "dayname", StandardSpiBasicTypes.STRING );
registry.registerNamed( "dayofweek", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "dayofyear", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "hour", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "last_day", StandardSpiBasicTypes.DATE );
registry.registerNamed( "microsecond", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "minute", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "month", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "monthname", StandardSpiBasicTypes.STRING );
registry.registerNoArgs( "now", StandardSpiBasicTypes.TIMESTAMP );
registry.registerNamed( "quarter", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "second", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "time", StandardSpiBasicTypes.TIME );
registry.registerNamed( "timestamp", StandardSpiBasicTypes.TIMESTAMP );
registry.registerNamed( "week", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "year", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "atan2", StandardSpiBasicTypes.DOUBLE );
registry.registerNamed( "mod", StandardSpiBasicTypes.INTEGER );
registry.registerNamed( "nvl" );
registry.registerNamed( "power", StandardSpiBasicTypes.DOUBLE );
}
// Dialect method overrides ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* RDMS does not support qualifing index names with the schema name.
*
* {@inheritDoc}
*/
@Override
public boolean qualifyIndexName() {
return false;
}
/**
* The RDMS DB supports the 'FOR UPDATE OF' clause. However, the RDMS-JDBC
* driver does not support this feature, so a false is return.
* The base dialect also returns a false, but we will leave this over-ride
* in to make sure it stays false.
*
* {@inheritDoc}
*/
@Override
public boolean forUpdateOfColumns() {
return false;
}
/**
* Since the RDMS-JDBC driver does not support for updates, this string is
* set to an empty string. Whenever, the driver does support this feature,
* the returned string should be " FOR UPDATE OF". Note that RDMS does not
* support the string 'FOR UPDATE' string.
*
* {@inheritDoc}
*/
@Override
public String getForUpdateString() {
// Original Dialect.java returns " for update";
return "";
}
// Verify the state of this new method in Hibernate 3.0 Dialect.java
/**
* RDMS does not support Cascade Deletes.
* Need to review this in the future when support is provided.
*
* {@inheritDoc}
*/
@Override
public boolean supportsCascadeDelete() {
return false;
}
/**
* Currently, RDMS-JDBC does not support ForUpdate.
* Need to review this in the future when support is provided.
*
* {@inheritDoc}
*/
@Override
public boolean supportsOuterJoinForUpdate() {
return false;
}
@Override
public String getAddColumnString() {
return "add";
}
@Override
public String getNullColumnString() {
// The keyword used to specify a nullable column.
return " null";
}
@Override
public boolean supportsSequences() {
return true;
}
@Override
public String getSequenceNextValString(String sequenceName) {
// The where clause was added to eliminate this statement from Brute Force Searches.
return "select permuted_id('NEXT',31) from rdms.rdms_dummy where key_col = 1 ";
}
@Override
public String getCreateSequenceString(String sequenceName) {
// We must return a valid RDMS/RSA command from this method to
// prevent RDMS/RSA from issuing *ERROR 400
return "";
}
@Override
public String getDropSequenceString(String sequenceName) {
// We must return a valid RDMS/RSA command from this method to
// prevent RDMS/RSA from issuing *ERROR 400
return "";
}
@Override
public String getCascadeConstraintsString() {
// Used with DROP TABLE to delete all records in the table.
return " including contents";
}
@Override
public CaseFragment createCaseFragment() {
return new DecodeCaseFragment();
}
@Override
public LimitHandler getLimitHandler() {
if ( isLegacyLimitHandlerBehaviorEnabled() ) {
return LEGACY_LIMIT_HANDLER;
}
return LIMIT_HANDLER;
}
@Override
public boolean supportsLimit() {
return true;
}
@Override
public boolean supportsLimitOffset() {
return false;
}
@Override
public String getLimitString(String sql, int offset, int limit) {
if ( offset > 0 ) {
throw new UnsupportedOperationException( "query result offset is not supported" );
}
return sql + " fetch first " + limit + " rows only ";
}
@Override
public boolean supportsVariableLimit() {
return false;
}
@Override
public boolean supportsUnionAll() {
// RDMS supports the UNION ALL clause.
return true;
}
@Override
public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
// RDMS has no known variation of a "SELECT ... FOR UPDATE" syntax...
if ( lockMode == LockMode.PESSIMISTIC_FORCE_INCREMENT ) {
return new PessimisticForceIncrementLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.PESSIMISTIC_WRITE ) {
return new PessimisticWriteUpdateLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.PESSIMISTIC_READ ) {
return new PessimisticReadUpdateLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.OPTIMISTIC ) {
return new OptimisticLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.OPTIMISTIC_FORCE_INCREMENT ) {
return new OptimisticForceIncrementLockingStrategy( lockable, lockMode );
}
else if ( lockMode.greaterThan( LockMode.READ ) ) {
return new UpdateLockingStrategy( lockable, lockMode );
}
else {
return new SelectLockingStrategy( lockable, lockMode );
}
}
}