Remove COERCE_INTERNAL_CAST in SQL/JSON functions

Author: Nikita Glukhov

src/backend/parser/parse_expr.c

@@ -4853,7 +4853,7 @@ transformJsonFuncExpr(ParseState *pstate, JsonFuncExpr *func)
 										  jsexpr->returning->typid,
 										  jsexpr->returning->typmod,
 										  COERCION_EXPLICIT,
-										  COERCE_INTERNAL_CAST,
+										  COERCE_IMPLICIT_CAST,
 										  location);
 
 				if (!jsexpr->result_coercion->expr)