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HHH-17389 Support pg_hint_plan hints for PostgreSQL

This commit is contained in:
Christian Beikov 2023-11-09 16:08:38 +01:00
parent 016dc56208
commit adb86e7b7b
2 changed files with 35 additions and 0 deletions
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18
hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/PostgreSQLLegacyDialect.java
View File

@ -58,6 +58,7 @@ import org.hibernate.metamodel.spi.RuntimeModelCreationContext;
import org.hibernate.procedure.internal.PostgreSQLCallableStatementSupport;
import org.hibernate.procedure.spi.CallableStatementSupport;
import org.hibernate.query.SemanticException;
import org.hibernate.query.spi.QueryOptions;
import org.hibernate.query.sqm.FetchClauseType;
import org.hibernate.query.sqm.IntervalType;
import org.hibernate.query.sqm.TemporalUnit;
@ -1442,4 +1443,21 @@ public class PostgreSQLLegacyDialect extends Dialect {
public int rowIdSqlType() {
return OTHER;
}
@Override
public String getQueryHintString(String sql, String hints) {
return "/*+ " + hints + " */ " + sql;
}
@Override
public String addSqlHintOrComment(String sql, QueryOptions queryOptions, boolean commentsEnabled) {
// PostgreSQL's extension pg_hint_plan needs the hint to be the first comment
if ( commentsEnabled && queryOptions.getComment() != null ) {
sql = prependComment( sql, queryOptions.getComment() );
}
if ( queryOptions.getDatabaseHints() != null && queryOptions.getDatabaseHints().size() > 0 ) {
sql = getQueryHintString( sql, queryOptions.getDatabaseHints() );
}
return sql;
}
}

17
hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQLDialect.java
View File

@ -56,6 +56,7 @@ import org.hibernate.persister.entity.mutation.EntityMutationTarget;
import org.hibernate.procedure.internal.PostgreSQLCallableStatementSupport;
import org.hibernate.procedure.spi.CallableStatementSupport;
import org.hibernate.query.SemanticException;
import org.hibernate.query.spi.QueryOptions;
import org.hibernate.query.sqm.FetchClauseType;
import org.hibernate.query.sqm.IntervalType;
import org.hibernate.query.sqm.TemporalUnit;
@ -1476,6 +1477,22 @@ public class PostgreSQLDialect extends Dialect {
return OTHER;
}
@Override
public String getQueryHintString(String sql, String hints) {
return "/*+ " + hints + " */ " + sql;
}
@Override
public String addSqlHintOrComment(String sql, QueryOptions queryOptions, boolean commentsEnabled) {
// PostgreSQL's extension pg_hint_plan needs the hint to be the first comment
if ( commentsEnabled && queryOptions.getComment() != null ) {
sql = prependComment( sql, queryOptions.getComment() );
}
if ( queryOptions.getDatabaseHints() != null && queryOptions.getDatabaseHints().size() > 0 ) {
sql = getQueryHintString( sql, queryOptions.getDatabaseHints() );
}
return sql;
}
@FunctionalInterface
private interface OptionalTableUpdateStrategy {