Thread: how set GUC_check_errhint_string in call_string_check_hook()
Dear all,
I need help to send hint message to erreport() in call_string_check_hook function [src/backend/utils/misc/guc.c:8092]
In call_string_check_hook(), following parameter are resets
/* Reset variables that might be set by hook */
8100 GUC_check_errcode_value = ERRCODE_INVALID_PARAMETER_VALUE;
8101 GUC_check_errmsg_string = NULL;
8102 GUC_check_errdetail_string = NULL;
8103 GUC_check_errhint_string = NULL;
at line 8107 in ereport() it has conditional operation as
8113 GUC_check_errdetail_string ?
8114 errdetail_internal("%s", GUC_check_errdetail_string) : 0,
I have basic questions,
1. Condition testing of GUC_check_errdetail_string or other GUC_* is needed, even if we resting it?
2. Can I pass hint message in above ereport(), how?
Thanks in advance !
Regards,
Amul Sul
Amul Sul
Amul, On Thu, Feb 13, 2014 at 5:59 PM, amul sul <sul_amul@yahoo.co.in> wrote: > I have basic questions, > > 1. Condition testing of GUC_check_errdetail_string or other GUC_* is > needed, even if we resting it? A few lines before this conditional test, there is a call to the hook function (using the check_hook function pointer) as follows which might set these variables: if (!(*conf->check_hook) (newval, extra, source)) > 2. Can I pass hint message in above ereport(), how? > It could be done by setting the check hook related global variable "GUC_check_errhint_string" inside your hook function. -- Amit
Amit Langote <amitlangote09@gmail.com> writes:
> On Thu, Feb 13, 2014 at 5:59 PM, amul sul <sul_amul@yahoo.co.in> wrote:
>> 2. Can I pass hint message in above ereport(), how?
> It could be done by setting the check hook related global variable
> "GUC_check_errhint_string" inside your hook function.
You should use the macro GUC_check_errhint() to set up a hint inside
a GUC variable's check function. See check_XactIsoLevel() in
src/backend/commands/variable.c for examples.
regards, tom lane