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• MaxDBDialect.java

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org.hibernate.community.dialect.MaxDBDialect Maven / Gradle / Ivy

/*
 * 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.community.dialect;

import java.sql.DatabaseMetaData;
import java.sql.Types;

import org.hibernate.boot.model.FunctionContributions;
import org.hibernate.community.dialect.sequence.MaxDBSequenceSupport;
import org.hibernate.community.dialect.sequence.SequenceInformationExtractorSAPDBDatabaseImpl;
import org.hibernate.dialect.AbstractTransactSQLDialect;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.CommonFunctionFactory;
import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.dialect.pagination.LimitLimitHandler;
import org.hibernate.dialect.pagination.LimitOffsetLimitHandler;
import org.hibernate.dialect.sequence.SequenceSupport;
import org.hibernate.dialect.temptable.TemporaryTable;
import org.hibernate.dialect.temptable.TemporaryTableKind;
import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.metamodel.mapping.EntityMappingType;
import org.hibernate.metamodel.spi.RuntimeModelCreationContext;
import org.hibernate.query.sqm.TrimSpec;
import org.hibernate.query.sqm.mutation.internal.temptable.AfterUseAction;
import org.hibernate.query.sqm.mutation.internal.temptable.BeforeUseAction;
import org.hibernate.query.sqm.mutation.internal.temptable.LocalTemporaryTableInsertStrategy;
import org.hibernate.query.sqm.mutation.internal.temptable.LocalTemporaryTableMutationStrategy;
import org.hibernate.query.sqm.mutation.spi.SqmMultiTableInsertStrategy;
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.tool.schema.extract.spi.SequenceInformationExtractor;
import org.hibernate.type.BasicType;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.descriptor.jdbc.JdbcType;
import org.hibernate.type.descriptor.jdbc.spi.JdbcTypeRegistry;

import static org.hibernate.dialect.SimpleDatabaseVersion.ZERO_VERSION;
import static org.hibernate.query.sqm.produce.function.FunctionParameterType.INTEGER;
import static org.hibernate.query.sqm.produce.function.FunctionParameterType.STRING;
import static org.hibernate.type.SqlTypes.BIGINT;
import static org.hibernate.type.SqlTypes.BLOB;
import static org.hibernate.type.SqlTypes.CLOB;
import static org.hibernate.type.SqlTypes.DECIMAL;
import static org.hibernate.type.SqlTypes.NUMERIC;
import static org.hibernate.type.SqlTypes.TIMESTAMP;
import static org.hibernate.type.SqlTypes.TIMESTAMP_WITH_TIMEZONE;
import static org.hibernate.type.SqlTypes.TINYINT;
import static org.hibernate.type.SqlTypes.VARBINARY;

/**
 * A SQL dialect compatible with SAP MaxDB.
 *
 * @author Brad Clow
 */
public class MaxDBDialect extends Dialect {

	public MaxDBDialect() {
		super( ZERO_VERSION );
	}

	public MaxDBDialect(DialectResolutionInfo info) {
		super( info );
	}

	@Override
	protected String columnType(int sqlTypeCode) {
		switch ( sqlTypeCode ) {
			case TINYINT:
				return "smallint";
			case BIGINT:
				return "fixed(19,0)";
			case NUMERIC:
			case DECIMAL:
				return "fixed($p,$s)";
			//no explicit precision
			case TIMESTAMP:
			case TIMESTAMP_WITH_TIMEZONE:
				return "timestamp";
			case VARBINARY:
			case BLOB:
				return "long byte";
			case CLOB:
				return "long varchar";
			default:
				return super.columnType( sqlTypeCode );
		}
	}

	@Override
	public int getMaxVarbinaryLength() {
		// there's no varbinary type
		return -1;
	}

	@Override
	public JdbcType resolveSqlTypeDescriptor(
			String columnTypeName,
			int jdbcTypeCode,
			int precision,
			int scale,
			JdbcTypeRegistry jdbcTypeRegistry) {
		switch ( jdbcTypeCode ) {
			case Types.NUMERIC:
			case Types.DECIMAL:
				if ( precision == 19 && scale == 0 ) {
					return jdbcTypeRegistry.getDescriptor( Types.BIGINT );
				}
		}
		return super.resolveSqlTypeDescriptor(
				columnTypeName,
				jdbcTypeCode,
				precision,
				scale,
				jdbcTypeRegistry
		);
	}

	@Override
	public int getDefaultStatementBatchSize() {
		return 15;
	}

	@Override
	public LimitHandler getLimitHandler() {
		return LimitLimitHandler.INSTANCE;
	}

	@Override
	public void initializeFunctionRegistry(FunctionContributions functionContributions) {
		super.initializeFunctionRegistry(functionContributions);

		CommonFunctionFactory functionFactory = new CommonFunctionFactory(functionContributions);
		functionFactory.log();
		functionFactory.pi();
		functionFactory.cot();
		functionFactory.cosh();
		functionFactory.sinh();
		functionFactory.tanh();
		functionFactory.radians();
		functionFactory.degrees();
		functionFactory.trunc();
		functionFactory.trim2();
		functionFactory.substr();
		functionFactory.substring_substr();
		functionFactory.translate();
		functionFactory.initcap();
		functionFactory.soundex();
		functionFactory.yearMonthDay();
		functionFactory.hourMinuteSecond();
		functionFactory.dayofweekmonthyear();
		functionFactory.daynameMonthname();
		functionFactory.dateTimeTimestamp();
		functionFactory.ceiling_ceil();
		functionFactory.week_weekofyear();
		functionFactory.concat_pipeOperator();
		functionFactory.coalesce_value();
		//since lpad/rpad are not actually useful padding
		//functions, map them to lfill/rfill
		functionFactory.pad_fill();
		functionFactory.datediff();
		functionFactory.adddateSubdateAddtimeSubtime();
		functionFactory.addMonths();

		final BasicType integerType = functionContributions.getTypeConfiguration().getBasicTypeRegistry()
				.resolve( StandardBasicTypes.INTEGER );
		functionContributions.getFunctionRegistry().registerPattern( "extract", "?1(?2)", integerType );

		functionContributions.getFunctionRegistry().patternDescriptorBuilder( "nullif", "case ?1 when ?2 then null else ?1 end" )
				.setExactArgumentCount(2)
				.register();

		functionContributions.getFunctionRegistry().namedDescriptorBuilder( "index" )
				.setInvariantType( integerType )
				.setArgumentCountBetween( 2, 4 )
				.register();

		functionContributions.getFunctionRegistry().registerBinaryTernaryPattern(
				"locate",
				integerType, "index(?2,?1)", "index(?2,?1,?3)",
				STRING, STRING, INTEGER,
				functionContributions.getTypeConfiguration()
		).setArgumentListSignature("(pattern, string[, start])");
	}

	@Override
	public SqlAstTranslatorFactory getSqlAstTranslatorFactory() {
		return new StandardSqlAstTranslatorFactory() {
			@Override
			protected  SqlAstTranslator buildTranslator(
					SessionFactoryImplementor sessionFactory, Statement statement) {
				return new MaxDBSqlAstTranslator<>( sessionFactory, statement );
			}
		};
	}

	@Override
	public String trimPattern(TrimSpec specification, boolean isWhitespace) {
		return AbstractTransactSQLDialect.replaceLtrimRtrim( specification, isWhitespace );
	}

	@Override
	public boolean dropConstraints() {
		return false;
	}

	@Override
	public String getAddColumnString() {
		return "add";
	}

	@Override
	public String getAddForeignKeyConstraintString(
			String constraintName,
			String[] foreignKey,
			String referencedTable,
			String[] primaryKey,
			boolean referencesPrimaryKey) {
		final StringBuilder res = new StringBuilder( 30 )
				.append( " foreign key " )
				.append( constraintName )
				.append( " (" )
				.append( String.join( ", ", foreignKey ) )
				.append( ") references " )
				.append( referencedTable );

		if ( !referencesPrimaryKey ) {
			res.append( " (" )
					.append( String.join( ", ", primaryKey ) )
					.append( ')' );
		}

		return res.toString();
	}

	public String getAddForeignKeyConstraintString(
			String constraintName,
			String foreignKeyDefinition) {
		return foreignKeyDefinition;
	}

	@Override
	public String getAddPrimaryKeyConstraintString(String constraintName) {
		return " primary key ";
	}

	@Override
	public String getNullColumnString() {
		return " null";
	}

	@Override
	public SequenceSupport getSequenceSupport() {
		return MaxDBSequenceSupport.INSTANCE;
	}

	@Override
	public String getQuerySequencesString() {
		return "select * from domain.sequences";
	}

	@Override
	public SequenceInformationExtractor getSequenceInformationExtractor() {
		return SequenceInformationExtractorSAPDBDatabaseImpl.INSTANCE;
	}

	@Override
	public boolean supportsOffsetInSubquery() {
		return true;
	}

	@Override
	public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(
			EntityMappingType rootEntityDescriptor,
			RuntimeModelCreationContext runtimeModelCreationContext) {
		return new LocalTemporaryTableMutationStrategy(
				TemporaryTable.createIdTable(
						rootEntityDescriptor,
						basename -> "temp." + TemporaryTable.ID_TABLE_PREFIX + basename,
						this,
						runtimeModelCreationContext
				),
				runtimeModelCreationContext.getSessionFactory()
		);
	}

	@Override
	public SqmMultiTableInsertStrategy getFallbackSqmInsertStrategy(
			EntityMappingType rootEntityDescriptor,
			RuntimeModelCreationContext runtimeModelCreationContext) {
		return new LocalTemporaryTableInsertStrategy(
				TemporaryTable.createEntityTable(
						rootEntityDescriptor,
						name -> "temp." + TemporaryTable.ENTITY_TABLE_PREFIX + name,
						this,
						runtimeModelCreationContext
				),
				runtimeModelCreationContext.getSessionFactory()
		);
	}

	@Override
	public BeforeUseAction getTemporaryTableBeforeUseAction() {
		return BeforeUseAction.CREATE;
	}

	@Override
	public AfterUseAction getTemporaryTableAfterUseAction() {
		return AfterUseAction.DROP;
	}

	@Override
	public TemporaryTableKind getSupportedTemporaryTableKind() {
		return TemporaryTableKind.LOCAL;
	}

	@Override
	public String getTemporaryTableCreateOptions() {
		return "ignore rollback";
	}

	@Override
	public boolean supportsJdbcConnectionLobCreation(DatabaseMetaData databaseMetaData) {
		return false;
	}
}