Re: jsonpath

Alexander Korotkov  writes:
> Attached patchset contains revised commit messages.  I'm going to
> commit this on no objections.

Sorry for slow response --- I was tied up with release preparations.

The -5 patches look pretty good.  A couple of nits:

@@ -774,9 +749,7 @@ executeItemOptUnwrapTarget(JsonPathExecContext *cxt, JsonPathItem *jsp,
             {
                 RETURN_ERROR(ereport(ERROR,
                                      (errcode(ERRCODE_JSON_ARRAY_NOT_FOUND),
-                                      errmsg(ERRMSG_JSON_ARRAY_NOT_FOUND),
-                                      errdetail("jsonpath array accessor can "
-                                                "only be applied to an array"))));
+                                      errdetail("jsonpath array accessor can only be applied to an array"))));
             }
             break;

I think you forgot to s/errdetail/errmsg/ in this one.  Likewise at:

+                                      errdetail("jsonpath wildcard member accessor can only be applied to an object"))));


Also, I saw two places where you missed removing a trailing period
from an errmsg:

+                              errmsg("left operand of jsonpath operator %s is not a single numeric value.",
+                                     jspOperationName(jsp->type)))));

+                              errmsg("right operand of jsonpath operator %s is not a single numeric value.",
+                                     jspOperationName(jsp->type)))));


I'd suggest making a quick pass for other instances of the same mistakes,
just in case.  I'm good with the wording on everything now.

			regards, tom lane