/
TimesTenDialect.java
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/
TimesTenDialect.java
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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 <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.community.dialect;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.RowLockStrategy;
import org.hibernate.dialect.function.CommonFunctionFactory;
import org.hibernate.dialect.lock.*;
import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.community.dialect.pagination.TimesTenLimitHandler;
import org.hibernate.dialect.sequence.SequenceSupport;
import org.hibernate.community.dialect.sequence.TimesTenSequenceSupport;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.metamodel.mapping.EntityMappingType;
import org.hibernate.metamodel.spi.RuntimeModelCreationContext;
import org.hibernate.persister.entity.Lockable;
import org.hibernate.query.IntervalType;
import org.hibernate.query.TemporalUnit;
import org.hibernate.query.spi.QueryEngine;
import org.hibernate.query.sqm.mutation.internal.idtable.AfterUseAction;
import org.hibernate.query.sqm.mutation.internal.idtable.GlobalTemporaryTableStrategy;
import org.hibernate.query.sqm.mutation.internal.idtable.IdTable;
import org.hibernate.query.sqm.mutation.internal.idtable.TempIdTableExporter;
import org.hibernate.query.sqm.mutation.spi.SqmMultiTableMutationStrategy;
import org.hibernate.sql.ast.SqlAstTranslator;
import org.hibernate.sql.ast.SqlAstTranslatorFactory;
import org.hibernate.sql.ast.spi.StandardSqlAstTranslatorFactory;
import org.hibernate.sql.ast.tree.Statement;
import org.hibernate.sql.exec.spi.JdbcOperation;
import org.hibernate.community.dialect.sequence.SequenceInformationExtractorTimesTenDatabaseImpl;
import org.hibernate.tool.schema.extract.spi.SequenceInformationExtractor;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.descriptor.jdbc.JdbcType;
import org.hibernate.type.descriptor.jdbc.spi.JdbcTypeDescriptorRegistry;
import java.sql.Types;
import jakarta.persistence.TemporalType;
/**
* A SQL dialect for TimesTen 5.1.
* <p/>
* Known limitations:
* joined-subclass support because of no CASE support in TimesTen
* No support for subqueries that includes aggregation
* - size() in HQL not supported
* - user queries that does subqueries with aggregation
* No CLOB/BLOB support
* No cascade delete support.
* No Calendar support
* No support for updating primary keys.
*
* @author Sherry Listgarten, Max Andersen, Chris Jenkins
*/
@SuppressWarnings("deprecation")
public class TimesTenDialect extends Dialect {
public TimesTenDialect() {
super();
//Note: these are the correct type mappings
// for the default Oracle type mode
// TypeMode=0
registerColumnType( Types.BOOLEAN, "tt_tinyint" );
registerColumnType(Types.TINYINT, "tt_tinyint");
registerColumnType(Types.SMALLINT, "tt_smallint");
registerColumnType(Types.INTEGER, "tt_integer");
registerColumnType(Types.BIGINT, "tt_bigint");
//note that 'binary_float'/'binary_double' might
//be better mappings for Java Float/Double
//'numeric'/'decimal' are synonyms for 'number'
registerColumnType(Types.NUMERIC, "number($p,$s)");
registerColumnType(Types.DECIMAL, "number($p,$s)" );
registerColumnType( Types.VARCHAR, "varchar2($l)" );
registerColumnType( Types.NVARCHAR, "nvarchar2($l)" );
//do not use 'date' because it's a datetime
registerColumnType(Types.DATE, "tt_date");
//'time' and 'tt_time' are synonyms
registerColumnType(Types.TIME, "tt_time");
//`timestamp` has more precision than `tt_timestamp`
// registerColumnType(Types.TIMESTAMP, "tt_timestamp");
registerColumnType(Types.TIMESTAMP_WITH_TIMEZONE, "timestamp($p)");
getDefaultProperties().setProperty( Environment.USE_STREAMS_FOR_BINARY, "true" );
getDefaultProperties().setProperty( Environment.STATEMENT_BATCH_SIZE, DEFAULT_BATCH_SIZE );
}
@Override
public int getVersion() {
return 0;
}
@Override
public JdbcType resolveSqlTypeDescriptor(
String columnTypeName,
int jdbcTypeCode,
int precision,
int scale,
JdbcTypeDescriptorRegistry jdbcTypeDescriptorRegistry) {
if ( jdbcTypeCode == Types.BIT ) {
return jdbcTypeDescriptorRegistry.getDescriptor( Types.BOOLEAN );
}
return super.resolveSqlTypeDescriptor(
columnTypeName,
jdbcTypeCode,
precision,
scale,
jdbcTypeDescriptorRegistry
);
}
@Override
public int getPreferredSqlTypeCodeForBoolean() {
return Types.BIT;
}
@Override
public int getDefaultDecimalPrecision() {
//the maximum
return 40;
}
@Override
public void initializeFunctionRegistry(QueryEngine queryEngine) {
super.initializeFunctionRegistry( queryEngine );
CommonFunctionFactory.trim2( queryEngine );
CommonFunctionFactory.soundex( queryEngine );
CommonFunctionFactory.trunc( queryEngine );
CommonFunctionFactory.toCharNumberDateTimestamp( queryEngine );
CommonFunctionFactory.ceiling_ceil( queryEngine );
CommonFunctionFactory.instr( queryEngine );
CommonFunctionFactory.substr( queryEngine );
CommonFunctionFactory.substring_substr( queryEngine );
CommonFunctionFactory.leftRight_substr( queryEngine );
CommonFunctionFactory.char_chr( queryEngine );
CommonFunctionFactory.rownumRowid( queryEngine );
CommonFunctionFactory.sysdate( queryEngine );
CommonFunctionFactory.addMonths( queryEngine );
CommonFunctionFactory.monthsBetween( queryEngine );
queryEngine.getSqmFunctionRegistry().registerBinaryTernaryPattern(
"locate",
queryEngine.getTypeConfiguration().getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER ),
"instr(?2,?1)",
"instr(?2,?1,?3)"
).setArgumentListSignature("(pattern, string[, start])");
}
@Override
public SqlAstTranslatorFactory getSqlAstTranslatorFactory() {
return new StandardSqlAstTranslatorFactory() {
@Override
protected <T extends JdbcOperation> SqlAstTranslator<T> buildTranslator(
SessionFactoryImplementor sessionFactory, Statement statement) {
return new TimesTenSqlAstTranslator<>( sessionFactory, statement );
}
};
}
@Override
public String timestampaddPattern(TemporalUnit unit, TemporalType temporalType, IntervalType intervalType) {
switch (unit) {
case NANOSECOND:
case NATIVE:
return "timestampadd(sql_tsi_frac_second,?2,?3)";
default:
return "timestampadd(sql_tsi_?1,?2,?3)";
}
}
@Override
public String timestampdiffPattern(TemporalUnit unit, TemporalType fromTemporalType, TemporalType toTemporalType) {
switch (unit) {
case NANOSECOND:
case NATIVE:
return "timestampdiff(sql_tsi_frac_second,?2,?3)";
default:
return "timestampdiff(sql_tsi_?1,?2,?3)";
}
}
@Override
public boolean qualifyIndexName() {
return false;
}
@Override
public String getAddColumnString() {
return "add";
}
@Override
public SequenceSupport getSequenceSupport() {
return TimesTenSequenceSupport.INSTANCE;
}
@Override
public String getQuerySequencesString() {
return "select name from sys.sequences";
}
@Override
public SequenceInformationExtractor getSequenceInformationExtractor() {
return SequenceInformationExtractorTimesTenDatabaseImpl.INSTANCE;
}
@Override
public boolean supportsNoWait() {
return true;
}
@Override
public RowLockStrategy getWriteRowLockStrategy() {
return RowLockStrategy.COLUMN;
}
@Override
public String getForUpdateString(String aliases) {
return " for update of " + aliases;
}
@Override
public String getForUpdateNowaitString() {
return " for update nowait";
}
@Override
public String getWriteLockString(int timeout) {
return withTimeout( getForUpdateString(), timeout );
}
@Override
public String getWriteLockString(String aliases, int timeout) {
return withTimeout( getForUpdateString(aliases), timeout );
}
@Override
public String getReadLockString(int timeout) {
return getWriteLockString( timeout );
}
@Override
public String getReadLockString(String aliases, int timeout) {
return getWriteLockString( aliases, timeout );
}
private String withTimeout(String lockString, int timeout) {
switch (timeout) {
case LockOptions.NO_WAIT:
return supportsNoWait() ? lockString + " nowait" : lockString;
case LockOptions.SKIP_LOCKED:
case LockOptions.WAIT_FOREVER:
return lockString;
default:
return supportsWait() ? lockString + " wait " + Math.round( timeout / 1e3f ) : lockString;
}
}
@Override
public boolean supportsColumnCheck() {
return false;
}
@Override
public boolean supportsTableCheck() {
return false;
}
@Override
public boolean supportsOffsetInSubquery() {
return true;
}
@Override
public LimitHandler getLimitHandler() {
return TimesTenLimitHandler.INSTANCE;
}
@Override
public boolean supportsCurrentTimestampSelection() {
return true;
}
@Override
public String getCurrentTimestampSelectString() {
return "select sysdate from sys.dual";
}
@Override
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
@Override
public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(
EntityMappingType rootEntityDescriptor,
RuntimeModelCreationContext runtimeModelCreationContext) {
return new GlobalTemporaryTableStrategy(
new IdTable( rootEntityDescriptor,
name -> name.length() > 30 ? name.substring( 0, 30 ) : name, this ),
() -> new TempIdTableExporter( false, this::getTypeName ) {
@Override
protected String getCreateOptions() {
return "on commit delete rows";
}
},
AfterUseAction.CLEAN,
runtimeModelCreationContext.getSessionFactory()
);
}
@Override
public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
// TimesTen has no known variation of a "SELECT ... FOR UPDATE" syntax...
switch ( lockMode ) {
case OPTIMISTIC:
return new OptimisticLockingStrategy( lockable, lockMode );
case OPTIMISTIC_FORCE_INCREMENT:
return new OptimisticForceIncrementLockingStrategy( lockable, lockMode );
case PESSIMISTIC_READ:
return new PessimisticReadUpdateLockingStrategy( lockable, lockMode );
case PESSIMISTIC_WRITE:
return new PessimisticWriteUpdateLockingStrategy( lockable, lockMode );
case PESSIMISTIC_FORCE_INCREMENT:
return new PessimisticForceIncrementLockingStrategy( lockable, lockMode );
}
if ( lockMode.greaterThan( LockMode.READ ) ) {
return new UpdateLockingStrategy( lockable, lockMode );
}
else {
return new SelectLockingStrategy( lockable, lockMode );
}
}
@Override
public boolean supportsCircularCascadeDeleteConstraints() {
return false;
}
@Override
public String getSelectClauseNullString(int sqlType) {
switch (sqlType) {
case Types.VARCHAR:
case Types.CHAR:
return "to_char(null)";
case Types.DATE:
case Types.TIME:
case Types.TIMESTAMP:
case Types.TIMESTAMP_WITH_TIMEZONE:
return "to_date(null)";
default:
return "to_number(null)";
}
}
}