HHH-18359 Add a wrap parameter rendering mode for Informix

Author: beikov

hibernate-core/src/main/java/org/hibernate/sql/ast/SqlAstNodeRenderingMode.java

@@ -54,5 +54,12 @@ public enum SqlAstNodeRenderingMode {
  * such that it doesn't appear as plain parameter.
  * <code>null</code> literals will be wrapped in a cast.
  */
-NO_UNTYPED
+NO_UNTYPED,
+
+/**
+ * Wrap all nested parameters with a database specific wrapping strategy,
+ * defaulting to wrapping via a subquery e.g. {@code (select ?)}.
+ * This is useful for certain databases that don't support parameters directly within certain functions, like Informix.
+ */
+WRAP_ALL_PARAMETERS
 }

hibernate-core/src/main/java/org/hibernate/sql/ast/spi/AbstractSqlAstTranslator.java

@@ -7053,6 +7053,9 @@ public void visitParameter(JdbcParameter jdbcParameter) {
 renderExpressionAsLiteral( jdbcParameter, jdbcParameterBindings );
 break;
 }
+case WRAP_ALL_PARAMETERS:
+renderWrappedParameter( jdbcParameter );
+break;
 case DEFAULT:
 default: {
 visitParameterAsParameter( jdbcParameter );
@@ -7073,6 +7076,21 @@ protected final void renderParameterAsParameter(JdbcParameter jdbcParameter) {
 renderParameterAsParameter( parameterBinders.size() + 1, jdbcParameter );
 }
 
+protected void renderWrappedParameter(JdbcParameter jdbcParameter) {
+clauseStack.push( Clause.SELECT );
+
+try {
+appendSql( "(select " );
+
+render( jdbcParameter, SqlAstNodeRenderingMode.DEFAULT );
+appendSql( getFromDualForSelectOnly() );
+appendSql( ')' );
+}
+finally {
+clauseStack.pop();
+}
+}
+
 /**
  * Renders a parameter marker for the given position
  * @param jdbcParameter
@@ -7088,7 +7106,7 @@ protected void renderParameterAsParameter(int position, JdbcParameter jdbcParame
 @Override
 public void render(SqlAstNode sqlAstNode, SqlAstNodeRenderingMode renderingMode) {
 SqlAstNodeRenderingMode original = this.parameterRenderingMode;
-if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS ) {
+if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS && original != SqlAstNodeRenderingMode.WRAP_ALL_PARAMETERS ) {
 this.parameterRenderingMode = renderingMode;
 }
 try {
@@ -7101,7 +7119,7 @@ public void render(SqlAstNode sqlAstNode, SqlAstNodeRenderingMode renderingMode)
 
 protected void withParameterRenderingMode(SqlAstNodeRenderingMode renderingMode, Runnable runnable) {
 SqlAstNodeRenderingMode original = this.parameterRenderingMode;
-if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS ) {
+if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS && original != SqlAstNodeRenderingMode.WRAP_ALL_PARAMETERS ) {
 this.parameterRenderingMode = renderingMode;
 }
 try {
@@ -7285,7 +7303,7 @@ protected void visitAnsiCaseSearchedExpression(
 appendSql( "case" );
 final SqlAstNodeRenderingMode original = this.parameterRenderingMode;
 for ( CaseSearchedExpression.WhenFragment whenFragment : caseSearchedExpression.getWhenFragments() ) {
-if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS ) {
+if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS && original != SqlAstNodeRenderingMode.WRAP_ALL_PARAMETERS ) {
 this.parameterRenderingMode = SqlAstNodeRenderingMode.DEFAULT;
 }
 appendSql( " when " );
@@ -7313,7 +7331,7 @@ protected void visitDecodeCaseSearchedExpression(CaseSearchedExpression caseSear
 for ( int i = 0; i < caseNumber; i++ ) {
 final CaseSearchedExpression.WhenFragment whenFragment = whenFragments.get( i );
 Predicate predicate = whenFragment.getPredicate();
-if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS ) {
+if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS && original != SqlAstNodeRenderingMode.WRAP_ALL_PARAMETERS ) {
 this.parameterRenderingMode = SqlAstNodeRenderingMode.DEFAULT;
 }
 if ( i != 0 ) {
@@ -7360,12 +7378,12 @@ protected void visitAnsiCaseSimpleExpression(
 Consumer<Expression> resultRenderer) {
 appendSql( "case " );
 final SqlAstNodeRenderingMode original = this.parameterRenderingMode;
-if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS ) {
+if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS && original != SqlAstNodeRenderingMode.WRAP_ALL_PARAMETERS ) {
 this.parameterRenderingMode = SqlAstNodeRenderingMode.DEFAULT;
 }
 caseSimpleExpression.getFixture().accept( this );
 for ( CaseSimpleExpression.WhenFragment whenFragment : caseSimpleExpression.getWhenFragments() ) {
-if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS ) {
+if ( original != SqlAstNodeRenderingMode.INLINE_ALL_PARAMETERS && original != SqlAstNodeRenderingMode.WRAP_ALL_PARAMETERS ) {
 this.parameterRenderingMode = SqlAstNodeRenderingMode.DEFAULT;
 }
 appendSql( " when " );