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[6.2] HHH-19621 Don't render code units for DB2 for i #10580

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Merged
merged 1 commit into from
Jul 18, 2025
Merged

[6.2] HHH-19621 Don't render code units for DB2 for i #10580

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10 changes: 8 additions & 2 deletions ...e-community-dialects/src/main/java/org/hibernate/community/dialect/DB2iLegacyDialect.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
import org.hibernate.boot.model.FunctionContributions;
import org.hibernate.dialect.DatabaseVersion;
import org.hibernate.dialect.function.CommonFunctionFactory;
import org.hibernate.dialect.function.DB2SubstringFunction;
import org.hibernate.dialect.identity.DB2390IdentityColumnSupport;
import org.hibernate.dialect.identity.DB2IdentityColumnSupport;
import org.hibernate.dialect.identity.IdentityColumnSupport;
Expand Down Expand Up @@ -57,9 +58,14 @@ public DB2iLegacyDialect(DatabaseVersion version) {

@Override
public void initializeFunctionRegistry(FunctionContributions functionContributions) {
super.initializeFunctionRegistry(functionContributions);
super.initializeFunctionRegistry( functionContributions );
// DB2 for i doesn't allow code units: https://www.ibm.com/docs/en/i/7.1.0?topic=functions-substring
functionContributions.getFunctionRegistry().register(
"substring",
new DB2SubstringFunction( false, functionContributions.getTypeConfiguration() )
);
if ( getVersion().isSameOrAfter( 7, 2 ) ) {
CommonFunctionFactory functionFactory = new CommonFunctionFactory(functionContributions);
CommonFunctionFactory functionFactory = new CommonFunctionFactory( functionContributions );
functionFactory.listagg( null );
functionFactory.inverseDistributionOrderedSetAggregates();
functionFactory.hypotheticalOrderedSetAggregates_windowEmulation();
Expand Down
10 changes: 8 additions & 2 deletions hibernate-core/src/main/java/org/hibernate/dialect/DB2iDialect.java
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Expand Up @@ -8,6 +8,7 @@

import org.hibernate.boot.model.FunctionContributions;
import org.hibernate.dialect.function.CommonFunctionFactory;
import org.hibernate.dialect.function.DB2SubstringFunction;
import org.hibernate.dialect.identity.DB2IdentityColumnSupport;
import org.hibernate.dialect.identity.DB2zIdentityColumnSupport;
import org.hibernate.dialect.identity.IdentityColumnSupport;
Expand Down Expand Up @@ -61,9 +62,14 @@ protected DatabaseVersion getMinimumSupportedVersion() {

@Override
public void initializeFunctionRegistry(FunctionContributions functionContributions) {
super.initializeFunctionRegistry(functionContributions);
super.initializeFunctionRegistry( functionContributions );
// DB2 for i doesn't allow code units: https://www.ibm.com/docs/en/i/7.1.0?topic=functions-substring
functionContributions.getFunctionRegistry().register(
"substring",
new DB2SubstringFunction( false, functionContributions.getTypeConfiguration() )
);
if ( getVersion().isSameOrAfter( 7, 2 ) ) {
CommonFunctionFactory functionFactory = new CommonFunctionFactory(functionContributions);
CommonFunctionFactory functionFactory = new CommonFunctionFactory( functionContributions );
functionFactory.listagg( null );
functionFactory.inverseDistributionOrderedSetAggregates();
functionFactory.hypotheticalOrderedSetAggregates_windowEmulation();
Expand Down
9 changes: 8 additions & 1 deletion hibernate-core/src/main/java/org/hibernate/dialect/function/DB2SubstringFunction.java
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Expand Up @@ -29,14 +29,21 @@
*/
public class DB2SubstringFunction extends AbstractSqmSelfRenderingFunctionDescriptor {

private final boolean needsCodeUnit;

public DB2SubstringFunction(TypeConfiguration typeConfiguration) {
this( true, typeConfiguration );
}

public DB2SubstringFunction(boolean needsCodeUnit, TypeConfiguration typeConfiguration) {
super(
"substring",
new ArgumentTypesValidator( StandardArgumentsValidators.between( 2, 4 ), STRING, INTEGER, INTEGER, FunctionParameterType.ANY ),
StandardFunctionReturnTypeResolvers.invariant( typeConfiguration.getBasicTypeRegistry().resolve(
StandardBasicTypes.STRING ) ),
StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, INTEGER, INTEGER )
);
this.needsCodeUnit = needsCodeUnit;
}

@Override
Expand All @@ -51,7 +58,7 @@ public void render(
sqlAppender.appendSql( ',' );
arguments.get( i ).accept( walker );
}
if ( argumentCount != 4 ) {
if ( argumentCount != 4 && needsCodeUnit ) {
sqlAppender.appendSql( ",codeunits32" );
}
sqlAppender.appendSql( ')' );
Expand Down
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