diff --git a/src/backend/executor/execExpr.c b/src/backend/executor/execExpr.c
index e6e616865c..bf3a08c5f0 100644
--- a/src/backend/executor/execExpr.c
+++ b/src/backend/executor/execExpr.c
@@ -2294,21 +2294,8 @@ ExecInitExprRec(Expr *node, ExprState *state,
 			{
 				JsonValueExpr *jve = (JsonValueExpr *) node;
 
-				ExecInitExprRec(jve->raw_expr, state, resv, resnull);
-
-				if (jve->formatted_expr)
-				{
-					Datum	   *innermost_caseval = state->innermost_caseval;
-					bool	   *innermost_isnull = state->innermost_casenull;
-
-					state->innermost_caseval = resv;
-					state->innermost_casenull = resnull;
-
-					ExecInitExprRec(jve->formatted_expr, state, resv, resnull);
-
-					state->innermost_caseval = innermost_caseval;
-					state->innermost_casenull = innermost_isnull;
-				}
+				Assert(jve->formatted_expr != NULL);
+				ExecInitExprRec(jve->formatted_expr, state, resv, resnull);
 				break;
 			}
 
diff --git a/src/backend/nodes/makefuncs.c b/src/backend/nodes/makefuncs.c
index 39e1884cf4..c6c310d253 100644
--- a/src/backend/nodes/makefuncs.c
+++ b/src/backend/nodes/makefuncs.c
@@ -853,6 +853,10 @@ makeJsonValueExpr(Expr *expr, JsonFormat *format)
 	JsonValueExpr *jve = makeNode(JsonValueExpr);
 
 	jve->raw_expr = expr;
+
+	/*
+	 * Set after checking the format, if needed, in transformJsonValueExpr().
+	 */
 	jve->formatted_expr = NULL;
 	jve->format = format;
 
diff --git a/src/backend/optimizer/util/clauses.c b/src/backend/optimizer/util/clauses.c
index 7f453b04f8..da258968b8 100644
--- a/src/backend/optimizer/util/clauses.c
+++ b/src/backend/optimizer/util/clauses.c
@@ -2827,25 +2827,12 @@ eval_const_expressions_mutator(Node *node,
 		case T_JsonValueExpr:
 			{
 				JsonValueExpr *jve = (JsonValueExpr *) node;
-				Node	   *raw;
+				Node	   *formatted;
 
-				raw = eval_const_expressions_mutator((Node *) jve->raw_expr,
-													 context);
-				if (raw && IsA(raw, Const))
-				{
-					Node	   *formatted;
-					Node	   *save_case_val = context->case_val;
-
-					context->case_val = raw;
-
-					formatted = eval_const_expressions_mutator((Node *) jve->formatted_expr,
-															   context);
-
-					context->case_val = save_case_val;
-
-					if (formatted && IsA(formatted, Const))
-						return formatted;
-				}
+				formatted = eval_const_expressions_mutator((Node *) jve->formatted_expr,
+														   context);
+				if (formatted && IsA(formatted, Const))
+					return formatted;
 				break;
 			}
 
diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index 5bf790cf0f..26344743e4 100644
--- a/src/backend/parser/parse_expr.c
+++ b/src/backend/parser/parse_expr.c
@@ -3202,21 +3202,6 @@ makeJsonByteaToTextConversion(Node *expr, JsonFormat *format, int location)
 	return (Node *) fexpr;
 }
 
-/*
- * Make a CaseTestExpr node.
- */
-static Node *
-makeCaseTestExpr(Node *expr)
-{
-	CaseTestExpr *placeholder = makeNode(CaseTestExpr);
-
-	placeholder->typeId = exprType(expr);
-	placeholder->typeMod = exprTypmod(expr);
-	placeholder->collation = exprCollation(expr);
-
-	return (Node *) placeholder;
-}
-
 /*
  * Transform JSON value expression using specified input JSON format or
  * default format otherwise.
@@ -3268,11 +3253,8 @@ transformJsonValueExpr(ParseState *pstate, char *constructName,
 	if (format != JS_FORMAT_DEFAULT)
 	{
 		Oid			targettype = format == JS_FORMAT_JSONB ? JSONBOID : JSONOID;
-		Node	   *orig = makeCaseTestExpr(expr);
 		Node	   *coerced;
 
-		expr = orig;
-
 		if (exprtype != BYTEAOID && typcategory != TYPCATEGORY_STRING)
 			ereport(ERROR,
 					errcode(ERRCODE_DATATYPE_MISMATCH),
@@ -3310,7 +3292,7 @@ transformJsonValueExpr(ParseState *pstate, char *constructName,
 			coerced = (Node *) fexpr;
 		}
 
-		if (coerced == orig)
+		if (coerced == expr)
 			expr = rawexpr;
 		else
 		{
@@ -3537,8 +3519,22 @@ makeJsonConstructorExpr(ParseState *pstate, JsonConstructorType type,
 	jsctor->absent_on_null = absent_on_null;
 	jsctor->location = location;
 
+	/*
+	 * Coerce to the RETURNING type and format, if needed.  We abuse
+	 * CaseTestExpr here as placeholder to pass the result of either evaluating
+	 * 'fexpr' or whatever is produced by ExecEvalJsonConstructor() that is of
+	 * type JSON or JSONB to the coercion function.
+	 */
 	if (fexpr)
-		placeholder = makeCaseTestExpr((Node *) fexpr);
+	{
+		CaseTestExpr *cte = makeNode(CaseTestExpr);
+
+		cte->typeId = exprType((Node *) fexpr);
+		cte->typeMod = exprTypmod((Node *) fexpr);
+		cte->collation = exprCollation((Node *) fexpr);
+
+		placeholder = (Node *) cte;
+	}
 	else
 	{
 		CaseTestExpr *cte = makeNode(CaseTestExpr);
@@ -3636,6 +3632,11 @@ transformJsonArrayQueryConstructor(ParseState *pstate,
 	colref->location = ctor->location;
 
 	agg->arg = makeJsonValueExpr((Expr *) colref, ctor->format);
+	/*
+	 * No formatting necessary, so set formatted_expr to be the same as
+	 * raw_expr.
+	 */
+	agg->arg->formatted_expr = agg->arg->raw_expr;
 	agg->absent_on_null = ctor->absent_on_null;
 	agg->constructor = makeNode(JsonAggConstructor);
 	agg->constructor->agg_order = NIL;
@@ -3900,7 +3901,7 @@ transformJsonParseArg(ParseState *pstate, Node *jsexpr, JsonFormat *format,
 	{
 		JsonValueExpr *jve;
 
-		expr = makeCaseTestExpr(raw_expr);
+		expr = raw_expr;
 		expr = makeJsonByteaToTextConversion(expr, format, exprLocation(expr));
 		*exprtype = TEXTOID;
 
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h
index 792a743f72..0d2df069b3 100644
--- a/src/include/nodes/primnodes.h
+++ b/src/include/nodes/primnodes.h
@@ -1264,6 +1264,8 @@ typedef struct CaseWhen
  *	  see build_coercion_expression().
  *	* Nested FieldStore/SubscriptingRef assignment expressions in INSERT/UPDATE;
  *	  see transformAssignmentIndirection().
+ *	* Placeholder for intermediate results in some SQL/JSON expression nodes,
+ *	  such as JsonConstructorExpr.
  *
  * The uses in CaseExpr and ArrayCoerceExpr are safe only to the extent that
  * there is not any other CaseExpr or ArrayCoerceExpr between the value source
@@ -1593,12 +1595,15 @@ typedef struct JsonReturning
 /*
  * JsonValueExpr -
  *		representation of JSON value expression (expr [FORMAT JsonFormat])
+ *
+ * Note that raw_expr is only there for displaying and is not evaluated by
+ * ExecInterpExpr() and eval_const_exprs_mutator().
  */
 typedef struct JsonValueExpr
 {
 	NodeTag		type;
 	Expr	   *raw_expr;		/* raw expression */
-	Expr	   *formatted_expr; /* formatted expression or NULL */
+	Expr	   *formatted_expr; /* formatted expression */
 	JsonFormat *format;			/* FORMAT clause, if specified */
 } JsonValueExpr;