HHH-18368 Fix for Informix function coalesce() error

Author: VladoKuruc

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixDialect.java

@@ -29,6 +29,7 @@
 import org.hibernate.dialect.VarcharUUIDJdbcType;
 import org.hibernate.dialect.function.CaseLeastGreatestEmulation;
 import org.hibernate.dialect.function.CommonFunctionFactory;
+import org.hibernate.dialect.function.NvlCoalesceEmulation;
 import org.hibernate.dialect.identity.IdentityColumnSupport;
 import org.hibernate.dialect.pagination.LimitHandler;
 import org.hibernate.dialect.sequence.SequenceSupport;
@@ -336,12 +337,13 @@ public void initializeFunctionRegistry(FunctionContributions functionContributio
 		functionFactory.variance();
 		functionFactory.bitLength_pattern( "length(?1)*8" );
 
-		if ( getVersion().isSameOrAfter( 12 ) ) {
+		if ( getVersion().isBefore( 12 ) ) {
+			functionContributions.getFunctionRegistry().register( "coalesce", new NvlCoalesceEmulation() );
+		}
+		else {
+			functionFactory.coalesce(SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS);
 			functionFactory.locate_charindex();
 		}
-
-		//coalesce() and nullif() both supported since Informix 12
-
 		functionContributions.getFunctionRegistry().register( "least", new CaseLeastGreatestEmulation( true ) );
 		functionContributions.getFunctionRegistry().register( "greatest", new CaseLeastGreatestEmulation( false ) );
 		if ( supportsWindowFunctions() ) {

hibernate-core/src/main/java/org/hibernate/dialect/function/CommonFunctionFactory.java

@@ -1566,9 +1566,14 @@ public void atan2_atn2() {
 	}
 
 	public void coalesce() {
+		coalesce( SqlAstNodeRenderingMode.DEFAULT );
+	}
+
+	public void coalesce( SqlAstNodeRenderingMode inferenceArgumentRenderingMode ) {
 		functionRegistry.namedDescriptorBuilder( "coalesce" )
 				.setMinArgumentCount( 1 )
 				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
+				.setArgumentRenderingMode( inferenceArgumentRenderingMode )
 				.register();
 	}