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PostgreSQLDialect.java
1210 lines (1087 loc) · 36.7 KB
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PostgreSQLDialect.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.dialect;
import java.sql.CallableStatement;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.time.temporal.TemporalAccessor;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;
import jakarta.persistence.TemporalType;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.PessimisticLockException;
import org.hibernate.QueryTimeoutException;
import org.hibernate.boot.model.TypeContributions;
import org.hibernate.dialect.function.CommonFunctionFactory;
import org.hibernate.dialect.identity.IdentityColumnSupport;
import org.hibernate.dialect.identity.PostgreSQLIdentityColumnSupport;
import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.dialect.pagination.LimitOffsetLimitHandler;
import org.hibernate.dialect.pagination.OffsetFetchLimitHandler;
import org.hibernate.dialect.sequence.PostgreSQLSequenceSupport;
import org.hibernate.dialect.sequence.SequenceSupport;
import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
import org.hibernate.engine.jdbc.env.spi.IdentifierCaseStrategy;
import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
import org.hibernate.engine.jdbc.env.spi.NameQualifierSupport;
import org.hibernate.engine.jdbc.spi.JdbcServices;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.exception.LockAcquisitionException;
import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
import org.hibernate.internal.util.JdbcExceptionHelper;
import org.hibernate.metamodel.mapping.EntityMappingType;
import org.hibernate.metamodel.spi.RuntimeModelCreationContext;
import org.hibernate.procedure.internal.PostgresCallableStatementSupport;
import org.hibernate.procedure.spi.CallableStatementSupport;
import org.hibernate.query.SemanticException;
import org.hibernate.query.spi.QueryEngine;
import org.hibernate.query.sqm.FetchClauseType;
import org.hibernate.query.sqm.IntervalType;
import org.hibernate.query.sqm.TemporalUnit;
import org.hibernate.query.sqm.mutation.internal.cte.CteInsertStrategy;
import org.hibernate.query.sqm.mutation.internal.cte.CteMutationStrategy;
import org.hibernate.query.sqm.mutation.spi.SqmMultiTableInsertStrategy;
import org.hibernate.query.sqm.mutation.spi.SqmMultiTableMutationStrategy;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.sql.ast.SqlAstTranslator;
import org.hibernate.sql.ast.SqlAstTranslatorFactory;
import org.hibernate.sql.ast.spi.SqlAppender;
import org.hibernate.sql.ast.spi.StandardSqlAstTranslatorFactory;
import org.hibernate.sql.ast.tree.Statement;
import org.hibernate.sql.exec.spi.JdbcOperation;
import org.hibernate.type.JavaObjectType;
import org.hibernate.type.descriptor.java.PrimitiveByteArrayJavaType;
import org.hibernate.type.descriptor.jdbc.ArrayJdbcType;
import org.hibernate.type.descriptor.jdbc.BlobJdbcType;
import org.hibernate.type.descriptor.jdbc.ClobJdbcType;
import org.hibernate.type.descriptor.jdbc.InstantAsTimestampWithTimeZoneJdbcType;
import org.hibernate.type.descriptor.jdbc.JdbcType;
import org.hibernate.type.descriptor.jdbc.ObjectNullAsBinaryTypeJdbcType;
import org.hibernate.type.descriptor.jdbc.UUIDJdbcType;
import org.hibernate.type.descriptor.jdbc.XmlJdbcType;
import org.hibernate.type.descriptor.jdbc.spi.JdbcTypeRegistry;
import org.hibernate.type.descriptor.sql.internal.CapacityDependentDdlType;
import org.hibernate.type.descriptor.sql.internal.DdlTypeImpl;
import org.hibernate.type.descriptor.sql.internal.Scale6IntervalSecondDdlType;
import org.hibernate.type.descriptor.sql.spi.DdlTypeRegistry;
import org.hibernate.type.spi.TypeConfiguration;
import static org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor.extractUsingTemplate;
import static org.hibernate.query.sqm.TemporalUnit.DAY;
import static org.hibernate.query.sqm.TemporalUnit.EPOCH;
import static org.hibernate.query.sqm.TemporalUnit.MONTH;
import static org.hibernate.query.sqm.TemporalUnit.QUARTER;
import static org.hibernate.query.sqm.TemporalUnit.YEAR;
import static org.hibernate.type.SqlTypes.ARRAY;
import static org.hibernate.type.SqlTypes.BINARY;
import static org.hibernate.type.SqlTypes.BLOB;
import static org.hibernate.type.SqlTypes.CHAR;
import static org.hibernate.type.SqlTypes.CLOB;
import static org.hibernate.type.SqlTypes.GEOGRAPHY;
import static org.hibernate.type.SqlTypes.FLOAT;
import static org.hibernate.type.SqlTypes.GEOMETRY;
import static org.hibernate.type.SqlTypes.INET;
import static org.hibernate.type.SqlTypes.JSON;
import static org.hibernate.type.SqlTypes.LONG32NVARCHAR;
import static org.hibernate.type.SqlTypes.LONG32VARBINARY;
import static org.hibernate.type.SqlTypes.LONG32VARCHAR;
import static org.hibernate.type.SqlTypes.NCHAR;
import static org.hibernate.type.SqlTypes.NCLOB;
import static org.hibernate.type.SqlTypes.NVARCHAR;
import static org.hibernate.type.SqlTypes.OTHER;
import static org.hibernate.type.SqlTypes.SQLXML;
import static org.hibernate.type.SqlTypes.TIMESTAMP;
import static org.hibernate.type.SqlTypes.TIMESTAMP_UTC;
import static org.hibernate.type.SqlTypes.TIMESTAMP_WITH_TIMEZONE;
import static org.hibernate.type.SqlTypes.TINYINT;
import static org.hibernate.type.SqlTypes.UUID;
import static org.hibernate.type.SqlTypes.VARBINARY;
import static org.hibernate.type.SqlTypes.VARCHAR;
import static org.hibernate.type.descriptor.DateTimeUtils.appendAsDate;
import static org.hibernate.type.descriptor.DateTimeUtils.appendAsTime;
import static org.hibernate.type.descriptor.DateTimeUtils.appendAsTimestampWithMicros;
/**
* A {@linkplain Dialect SQL dialect} for PostgreSQL 8 and above.
*
* @author Gavin King
*/
public class PostgreSQLDialect extends Dialect {
private static final PostgreSQLIdentityColumnSupport IDENTITY_COLUMN_SUPPORT = new PostgreSQLIdentityColumnSupport();
private final PostgreSQLDriverKind driverKind;
public PostgreSQLDialect() {
this( DatabaseVersion.make( 8, 0 ) );
}
public PostgreSQLDialect(DialectResolutionInfo info) {
super(info);
driverKind = PostgreSQLDriverKind.determineKind( info );
}
public PostgreSQLDialect(DatabaseVersion version) {
super(version);
driverKind = PostgreSQLDriverKind.PG_JDBC;
}
public PostgreSQLDialect(DatabaseVersion version, PostgreSQLDriverKind driverKind) {
super(version);
this.driverKind = driverKind;
}
@Override
public boolean getDefaultNonContextualLobCreation() {
return true;
}
@Override
protected String columnType(int sqlTypeCode) {
switch ( sqlTypeCode ) {
case TINYINT:
// no tinyint, not even in Postgres 11
return "smallint";
// there are no nchar/nvarchar types in Postgres
case NCHAR:
return columnType( CHAR );
case NVARCHAR:
return columnType( VARCHAR );
// since there's no real difference between TEXT and VARCHAR,
// except for the length limit, we can just use 'text' for the
// "long" string types
case LONG32VARCHAR:
case LONG32NVARCHAR:
return "text";
case BLOB:
case CLOB:
case NCLOB:
// use oid as the blob/clob type on Postgres because
// the JDBC driver doesn't allow using bytea/text through LOB APIs
return "oid";
// use bytea as the "long" binary type (that there is no
// real VARBINARY type in Postgres, so we always use this)
case BINARY:
case VARBINARY:
case LONG32VARBINARY:
return "bytea";
case TIMESTAMP_UTC:
return columnType( TIMESTAMP_WITH_TIMEZONE );
}
return super.columnType( sqlTypeCode );
}
@Override
protected String castType(int sqlTypeCode) {
switch ( sqlTypeCode ) {
case CHAR:
case NCHAR:
case VARCHAR:
case NVARCHAR:
case LONG32VARCHAR:
case LONG32NVARCHAR:
return "text";
case BINARY:
case VARBINARY:
case LONG32VARBINARY:
return "bytea";
}
return super.castType( sqlTypeCode );
}
@Override
protected void registerColumnTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry) {
super.registerColumnTypes( typeContributions, serviceRegistry );
final DdlTypeRegistry ddlTypeRegistry = typeContributions.getTypeConfiguration().getDdlTypeRegistry();
// Register this type to be able to support Float[]
// The issue is that the JDBC driver can't handle createArrayOf( "float(24)", ... )
// It requires the use of "real" or "float4"
// Alternatively we could introduce a new API in Dialect for creating such base names
ddlTypeRegistry.addDescriptor(
CapacityDependentDdlType.builder( FLOAT, columnType( FLOAT ), castType( FLOAT ), this )
.withTypeCapacity( 24, "float4" )
.build()
);
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( SQLXML, "xml", this ) );
if ( getVersion().isSameOrAfter( 8, 2 ) ) {
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( UUID, "uuid", this ) );
}
if ( PostgreSQLPGObjectJdbcType.isUsable() ) {
// The following DDL types require that the PGobject class is usable/visible
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( INET, "inet", this ) );
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( GEOMETRY, "geometry", this ) );
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( GEOGRAPHY, "geography", this ) );
ddlTypeRegistry.addDescriptor( new Scale6IntervalSecondDdlType( this ) );
if ( getVersion().isSameOrAfter( 9, 2 ) ) {
// Prefer jsonb if possible
if ( getVersion().isSameOrAfter( 9, 4 ) ) {
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( JSON, "jsonb", this ) );
}
else {
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( JSON, "json", this ) );
}
}
}
}
@Override
public int getMaxVarcharLength() {
return 10_485_760;
}
@Override
public int getMaxVarbinaryLength() {
//postgres has no varbinary-like type
return Integer.MAX_VALUE;
}
@Override
public int getDefaultStatementBatchSize() {
return 15;
}
@Override
public JdbcType resolveSqlTypeDescriptor(
String columnTypeName,
int jdbcTypeCode,
int precision,
int scale,
JdbcTypeRegistry jdbcTypeRegistry) {
switch ( jdbcTypeCode ) {
case OTHER:
switch ( columnTypeName ) {
case "uuid":
jdbcTypeCode = UUID;
break;
case "json":
case "jsonb":
jdbcTypeCode = JSON;
break;
case "xml":
jdbcTypeCode = SQLXML;
break;
case "inet":
jdbcTypeCode = INET;
break;
case "geometry":
jdbcTypeCode = GEOMETRY;
break;
case "geography":
jdbcTypeCode = GEOGRAPHY;
break;
}
break;
case TIMESTAMP:
// The PostgreSQL JDBC driver reports TIMESTAMP for timestamptz, but we use it only for mapping Instant
if ( "timestamptz".equals( columnTypeName ) ) {
jdbcTypeCode = TIMESTAMP_UTC;
}
break;
case ARRAY:
final JdbcType jdbcType = jdbcTypeRegistry.getDescriptor( jdbcTypeCode );
// PostgreSQL names array types by prepending an underscore to the base name
if ( jdbcType instanceof ArrayJdbcType && columnTypeName.charAt( 0 ) == '_' ) {
final String componentTypeName = columnTypeName.substring( 1 );
final Integer sqlTypeCode = resolveSqlTypeCode( componentTypeName, jdbcTypeRegistry.getTypeConfiguration() );
if ( sqlTypeCode != null ) {
return ( (ArrayJdbcType) jdbcType ).resolveType(
jdbcTypeRegistry.getTypeConfiguration(),
jdbcTypeRegistry.getTypeConfiguration().getServiceRegistry()
.getService( JdbcServices.class )
.getDialect(),
jdbcTypeRegistry.getDescriptor( sqlTypeCode ),
null
);
}
}
return jdbcType;
}
return jdbcTypeRegistry.getDescriptor( jdbcTypeCode );
}
@Override
protected Integer resolveSqlTypeCode(String columnTypeName, TypeConfiguration typeConfiguration) {
switch ( columnTypeName ) {
case "bool":
return Types.BOOLEAN;
case "float4":
// Use REAL instead of FLOAT to get Float as recommended Java type
return Types.REAL;
case "float8":
return Types.DOUBLE;
case "int2":
return Types.SMALLINT;
case "int4":
return Types.INTEGER;
case "int8":
return Types.BIGINT;
}
return super.resolveSqlTypeCode( columnTypeName, typeConfiguration );
}
@Override
public String currentTime() {
return "localtime";
}
@Override
public String currentTimestamp() {
return "localtimestamp";
}
@Override
public String currentTimestampWithTimeZone() {
return "current_timestamp";
}
/**
* The {@code extract()} function returns {@link TemporalUnit#DAY_OF_WEEK}
* numbered from 0 to 6. This isn't consistent with what most other
* databases do, so here we adjust the result by generating
* {@code (extract(dow,arg)+1))}.
*/
@Override
public String extractPattern(TemporalUnit unit) {
switch ( unit ) {
case DAY_OF_WEEK:
return "(" + super.extractPattern(unit) + "+1)";
default:
return super.extractPattern(unit);
}
}
/**
* {@code microsecond} is the smallest unit for an {@code interval},
* and the highest precision for a {@code timestamp}, so we could
* use it as the "native" precision, but it's more convenient to use
* whole seconds (with the fractional part), since we want to use
* {@code extract(epoch from ...)} in our emulation of
* {@code timestampdiff()}.
*/
@Override
public long getFractionalSecondPrecisionInNanos() {
return 1_000_000_000; //seconds
}
@Override
public String timestampaddPattern(TemporalUnit unit, TemporalType temporalType, IntervalType intervalType) {
if ( intervalType != null ) {
return "(?2+?3)";
}
switch ( unit ) {
case NANOSECOND:
return "(?3+(?2)/1e3*interval '1 microsecond')";
case NATIVE:
return "(?3+(?2)*interval '1 second')";
case QUARTER: //quarter is not supported in interval literals
return "(?3+(?2)*interval '3 month')";
case WEEK: //week is not supported in interval literals
return "(?3+(?2)*interval '7 day')";
default:
return "(?3+(?2)*interval '1 ?1')";
}
}
@Override
public String timestampdiffPattern(TemporalUnit unit, TemporalType fromTemporalType, TemporalType toTemporalType) {
if ( unit == null ) {
return "(?3-?2)";
}
if ( toTemporalType != TemporalType.TIMESTAMP && fromTemporalType != TemporalType.TIMESTAMP && unit == DAY ) {
// special case: subtraction of two dates
// results in an integer number of days
// instead of an INTERVAL
return "(?3-?2)";
}
else {
StringBuilder pattern = new StringBuilder();
switch ( unit ) {
case YEAR:
extractField( pattern, YEAR, fromTemporalType, toTemporalType, unit );
break;
case QUARTER:
pattern.append( "(" );
extractField( pattern, YEAR, fromTemporalType, toTemporalType, unit );
pattern.append( "+" );
extractField( pattern, QUARTER, fromTemporalType, toTemporalType, unit );
pattern.append( ")" );
break;
case MONTH:
pattern.append( "(" );
extractField( pattern, YEAR, fromTemporalType, toTemporalType, unit );
pattern.append( "+" );
extractField( pattern, MONTH, fromTemporalType, toTemporalType, unit );
pattern.append( ")" );
break;
case WEEK: //week is not supported by extract() when the argument is a duration
case DAY:
extractField( pattern, DAY, fromTemporalType, toTemporalType, unit );
break;
//in order to avoid multiple calls to extract(),
//we use extract(epoch from x - y) * factor for
//all the following units:
case HOUR:
case MINUTE:
case SECOND:
case NANOSECOND:
case NATIVE:
extractField( pattern, EPOCH, fromTemporalType, toTemporalType, unit );
break;
default:
throw new SemanticException( "unrecognized field: " + unit );
}
return pattern.toString();
}
}
protected void extractField(
StringBuilder pattern,
TemporalUnit unit,
TemporalType fromTimestamp,
TemporalType toTimestamp,
TemporalUnit toUnit) {
pattern.append( "extract(" );
pattern.append( translateDurationField( unit ) );
pattern.append( " from " );
if ( toTimestamp != TemporalType.TIMESTAMP && fromTimestamp != TemporalType.TIMESTAMP ) {
// special case subtraction of two
// dates results in an integer not
// an Interval
pattern.append( "age(?3,?2)" );
}
else {
switch ( unit ) {
case YEAR:
case MONTH:
case QUARTER:
pattern.append( "age(?3,?2)" );
break;
case DAY:
case HOUR:
case MINUTE:
case SECOND:
case EPOCH:
pattern.append( "?3-?2" );
break;
default:
throw new SemanticException( unit + " is not a legal field" );
}
}
pattern.append( ")" ).append( unit.conversionFactor( toUnit, this ) );
}
@Override
public TimeZoneSupport getTimeZoneSupport() {
return TimeZoneSupport.NORMALIZE;
}
@Override
public void initializeFunctionRegistry(QueryEngine queryEngine) {
super.initializeFunctionRegistry( queryEngine );
CommonFunctionFactory functionFactory = new CommonFunctionFactory(queryEngine);
functionFactory.round_floor(); //Postgres round(x,n) does not accept double
functionFactory.cot();
functionFactory.radians();
functionFactory.degrees();
functionFactory.trunc();
functionFactory.log();
if ( getVersion().isSameOrAfter(12) ) {
functionFactory.log10();
}
else {
queryEngine.getSqmFunctionRegistry().registerAlternateKey( "log10", "log" );
}
functionFactory.cbrt();
functionFactory.trim2();
functionFactory.repeat();
functionFactory.md5();
functionFactory.initcap();
functionFactory.substr();
functionFactory.substring_substr();
//also natively supports ANSI-style substring()
functionFactory.translate();
functionFactory.toCharNumberDateTimestamp();
functionFactory.concat_pipeOperator( "convert_from(lo_get(?1),pg_client_encoding())" );
functionFactory.localtimeLocaltimestamp();
functionFactory.dateTrunc();
functionFactory.length_characterLength_pattern( "length(lo_get(?1),pg_client_encoding())" );
functionFactory.bitLength_pattern( "bit_length(?1)", "length(lo_get(?1))*8" );
functionFactory.octetLength_pattern( "octet_length(?1)", "length(lo_get(?1))" );
functionFactory.ascii();
functionFactory.char_chr();
functionFactory.position();
functionFactory.bitandorxornot_operator();
functionFactory.bitAndOr();
functionFactory.everyAny_boolAndOr();
functionFactory.median_percentileCont( false );
functionFactory.stddev();
functionFactory.stddevPopSamp();
functionFactory.variance();
functionFactory.varPopSamp();
functionFactory.covarPopSamp();
functionFactory.corr();
functionFactory.regrLinearRegressionAggregates();
functionFactory.insert_overlay();
functionFactory.overlay();
functionFactory.soundex(); //was introduced in Postgres 9 apparently
functionFactory.locate_positionSubstring();
functionFactory.windowFunctions();
functionFactory.listagg_stringAgg( "varchar" );
if ( getVersion().isSameOrAfter( 9, 4 ) ) {
functionFactory.makeDateTimeTimestamp();
// Note that PostgreSQL doesn't support the OVER clause for ordered set-aggregate functions
functionFactory.inverseDistributionOrderedSetAggregates();
functionFactory.hypotheticalOrderedSetAggregates();
}
}
@Override
public NameQualifierSupport getNameQualifierSupport() {
// This method is overridden so the correct value will be returned when
// DatabaseMetaData is not available.
return NameQualifierSupport.SCHEMA;
}
@Override
public String getCurrentSchemaCommand() {
return "select current_schema()";
}
@Override
public boolean supportsDistinctFromPredicate() {
return true;
}
@Override
public boolean supportsIfExistsBeforeTableName() {
return getVersion().isSameOrAfter( 8, 2 );
}
@Override
public boolean supportsIfExistsBeforeConstraintName() {
return getVersion().isSameOrAfter( 9 );
}
@Override
public boolean supportsIfExistsAfterAlterTable() {
return getVersion().isSameOrAfter( 9, 2 );
}
@Override
public boolean supportsValuesList() {
return getVersion().isSameOrAfter( 8, 2 );
}
@Override
public boolean supportsPartitionBy() {
return getVersion().isSameOrAfter( 9, 1 );
}
@Override
public boolean supportsNonQueryWithCTE() {
return getVersion().isSameOrAfter( 9, 1 );
}
@Override
public SequenceSupport getSequenceSupport() {
return getVersion().isBefore( 8, 2 )
? PostgreSQLSequenceSupport.LEGACY_INSTANCE
: PostgreSQLSequenceSupport.INSTANCE;
}
@Override
public String getCascadeConstraintsString() {
return " cascade";
}
@Override
public String getQuerySequencesString() {
return "select * from information_schema.sequences";
}
@Override
public LimitHandler getLimitHandler() {
return getVersion().isBefore( 8, 4 )
? LimitOffsetLimitHandler.INSTANCE
: OffsetFetchLimitHandler.INSTANCE;
}
@Override
public String getForUpdateString(String aliases) {
return getForUpdateString() + " of " + aliases;
}
@Override
public String getForUpdateString(String aliases, LockOptions lockOptions) {
/*
* Parent's implementation for (aliases, lockOptions) ignores aliases.
*/
if ( aliases.isEmpty() ) {
LockMode lockMode = lockOptions.getLockMode();
final Iterator<Map.Entry<String, LockMode>> itr = lockOptions.getAliasLockIterator();
while ( itr.hasNext() ) {
// seek the highest lock mode
final Map.Entry<String, LockMode> entry = itr.next();
final LockMode lm = entry.getValue();
if ( lm.greaterThan( lockMode ) ) {
aliases = entry.getKey();
}
}
}
LockMode lockMode = lockOptions.getAliasSpecificLockMode( aliases );
if (lockMode == null ) {
lockMode = lockOptions.getLockMode();
}
switch ( lockMode ) {
case PESSIMISTIC_READ: {
return getReadLockString( aliases, lockOptions.getTimeOut() );
}
case PESSIMISTIC_WRITE: {
return getWriteLockString( aliases, lockOptions.getTimeOut() );
}
case UPGRADE_NOWAIT:
case PESSIMISTIC_FORCE_INCREMENT: {
return getForUpdateNowaitString(aliases);
}
case UPGRADE_SKIPLOCKED: {
return getForUpdateSkipLockedString(aliases);
}
default: {
return "";
}
}
}
@Override
public String getNoColumnsInsertString() {
return "default values";
}
@Override
public String getCaseInsensitiveLike(){
return "ilike";
}
@Override
public boolean supportsCaseInsensitiveLike() {
return true;
}
@Override
public String getNativeIdentifierGeneratorStrategy() {
return "sequence";
}
@Override
public boolean supportsOuterJoinForUpdate() {
return false;
}
@Override
public boolean useInputStreamToInsertBlob() {
return false;
}
@Override
public String getSelectClauseNullString(int sqlType, TypeConfiguration typeConfiguration) {
// Workaround for postgres bug #1453
return "null::" + typeConfiguration.getDdlTypeRegistry().getDescriptor( sqlType ).getRawTypeName();
}
@Override
public boolean supportsCommentOn() {
return true;
}
@Override
public boolean supportsCurrentTimestampSelection() {
return true;
}
@Override
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
@Override
public String getCurrentTimestampSelectString() {
return "select now()";
}
@Override
public boolean supportsTupleCounts() {
return true;
}
@Override
public boolean requiresParensForTupleDistinctCounts() {
return true;
}
@Override
public void appendBooleanValueString(SqlAppender appender, boolean bool) {
appender.appendSql( bool );
}
@Override
public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData)
throws SQLException {
if ( dbMetaData == null ) {
builder.setUnquotedCaseStrategy( IdentifierCaseStrategy.LOWER );
builder.setQuotedCaseStrategy( IdentifierCaseStrategy.MIXED );
}
return super.buildIdentifierHelper( builder, dbMetaData );
}
@Override
public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(
EntityMappingType rootEntityDescriptor,
RuntimeModelCreationContext runtimeModelCreationContext) {
return new CteMutationStrategy( rootEntityDescriptor, runtimeModelCreationContext );
}
@Override
public SqmMultiTableInsertStrategy getFallbackSqmInsertStrategy(
EntityMappingType rootEntityDescriptor,
RuntimeModelCreationContext runtimeModelCreationContext) {
return new CteInsertStrategy( rootEntityDescriptor, runtimeModelCreationContext );
}
@Override
public SqlAstTranslatorFactory getSqlAstTranslatorFactory() {
return new StandardSqlAstTranslatorFactory() {
@Override
protected <T extends JdbcOperation> SqlAstTranslator<T> buildTranslator(
SessionFactoryImplementor sessionFactory, Statement statement) {
return new PostgreSQLSqlAstTranslator<>( sessionFactory, statement );
}
};
}
@Override
public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor() {
return EXTRACTOR;
}
/**
* Constraint-name extractor for Postgres constraint violation exceptions.
* Orginally contributed by Denny Bartelt.
*/
private static final ViolatedConstraintNameExtractor EXTRACTOR =
new TemplatedViolatedConstraintNameExtractor( sqle -> {
switch ( Integer.parseInt( JdbcExceptionHelper.extractSqlState( sqle ) ) ) {
// CHECK VIOLATION
case 23514:
return extractUsingTemplate( "violates check constraint \"","\"", sqle.getMessage() );
// UNIQUE VIOLATION
case 23505:
return extractUsingTemplate( "violates unique constraint \"","\"", sqle.getMessage() );
// FOREIGN KEY VIOLATION
case 23503:
return extractUsingTemplate( "violates foreign key constraint \"","\"", sqle.getMessage() );
// NOT NULL VIOLATION
case 23502:
return extractUsingTemplate( "null value in column \"","\" violates not-null constraint", sqle.getMessage() );
// TODO: RESTRICT VIOLATION
case 23001:
return null;
// ALL OTHER
default:
return null;
}
} );
@Override
public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
return (sqlException, message, sql) -> {
switch ( JdbcExceptionHelper.extractSqlState( sqlException ) ) {
case "40P01":
// DEADLOCK DETECTED
return new LockAcquisitionException(message, sqlException, sql);
case "55P03":
// LOCK NOT AVAILABLE
return new PessimisticLockException(message, sqlException, sql);
case "57014":
return new QueryTimeoutException( message, sqlException, sql );
default:
// returning null allows other delegates to operate
return null;
}
};
}
@Override
public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException {
// Register the type of the out param - PostgreSQL uses Types.OTHER
statement.registerOutParameter( col++, Types.OTHER );
return col;
}
@Override
public ResultSet getResultSet(CallableStatement ps) throws SQLException {
ps.execute();
return (ResultSet) ps.getObject( 1 );
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@Override
public boolean supportsLobValueChangePropagation() {
return false;
}
@Override
public boolean supportsUnboundedLobLocatorMaterialization() {
return false;
}
@Override
public SelectItemReferenceStrategy getGroupBySelectItemReferenceStrategy() {
return SelectItemReferenceStrategy.POSITION;
}
@Override
public CallableStatementSupport getCallableStatementSupport() {
return PostgresCallableStatementSupport.INSTANCE;
}
@Override
public ResultSet getResultSet(CallableStatement statement, int position) throws SQLException {
if ( position != 1 ) {
throw new UnsupportedOperationException( "PostgreSQL only supports REF_CURSOR parameters as the first parameter" );
}
return (ResultSet) statement.getObject( 1 );
}
@Override
public ResultSet getResultSet(CallableStatement statement, String name) throws SQLException {
throw new UnsupportedOperationException( "PostgreSQL only supports accessing REF_CURSOR parameters by position" );
}
@Override
public boolean qualifyIndexName() {
return false;
}
@Override
public IdentityColumnSupport getIdentityColumnSupport() {
return IDENTITY_COLUMN_SUPPORT;
}
@Override
public NationalizationSupport getNationalizationSupport() {
return NationalizationSupport.IMPLICIT;
}
@Override
public int getMaxIdentifierLength() {
return 63;
}
@Override
public boolean supportsStandardArrays() {
return true;
}
@Override
public boolean supportsJdbcConnectionLobCreation(DatabaseMetaData databaseMetaData) {
return false;
}
@Override
public void appendDatetimeFormat(SqlAppender appender, String format) {
appender.appendSql( datetimeFormat( format ).result() );
}
public Replacer datetimeFormat(String format) {
return OracleDialect.datetimeFormat( format, true, false )
.replace("SSSSSS", "US")
.replace("SSSSS", "US")
.replace("SSSS", "US")
.replace("SSS", "MS")
.replace("SS", "MS")
.replace("S", "MS")
//use ISO day in week, as per DateTimeFormatter
.replace("ee", "ID")
.replace("e", "fmID")
//TZR is TZ in Postgres
.replace("zzz", "TZ")
.replace("zz", "TZ")
.replace("z", "TZ")
.replace("xxx", "OF")
.replace("xx", "OF")
.replace("x", "OF");
}
@Override
public String translateExtractField(TemporalUnit unit) {
switch ( unit ) {
//WEEK means the ISO week number on Postgres
case DAY_OF_MONTH: return "day";
case DAY_OF_YEAR: return "doy";
case DAY_OF_WEEK: return "dow";
default: return super.translateExtractField( unit );
}
}
@Override
public void appendBinaryLiteral(SqlAppender appender, byte[] bytes) {
appender.appendSql( "bytea '\\x" );
PrimitiveByteArrayJavaType.INSTANCE.appendString( appender, bytes );
appender.appendSql( '\'' );
}
@Override
public void appendDateTimeLiteral(
SqlAppender appender,
TemporalAccessor temporalAccessor,
TemporalType precision,
TimeZone jdbcTimeZone) {
switch ( precision ) {
case DATE:
appender.appendSql( "date '" );
appendAsDate( appender, temporalAccessor );
appender.appendSql( '\'' );
break;
case TIME:
appender.appendSql( "time '" );
appendAsTime( appender, temporalAccessor, supportsTemporalLiteralOffset(), jdbcTimeZone );
appender.appendSql( '\'' );
break;
case TIMESTAMP:
appender.appendSql( "timestamp with time zone '" );
appendAsTimestampWithMicros( appender, temporalAccessor, supportsTemporalLiteralOffset(), jdbcTimeZone );
appender.appendSql( '\'' );
break;
default:
throw new IllegalArgumentException();
}
}
@Override
public void appendDateTimeLiteral(SqlAppender appender, Date date, TemporalType precision, TimeZone jdbcTimeZone) {
switch ( precision ) {
case DATE:
appender.appendSql( "date '" );
appendAsDate( appender, date );
appender.appendSql( '\'' );
break;
case TIME:
appender.appendSql( "time '" );
appendAsTime( appender, date );
appender.appendSql( '\'' );
break;