| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com> |
| Cc: | Alexander Korotkov <akorotkov(at)postgresql(dot)org>, pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: pgsql: Get rid of backtracking in jsonpath_scan.l |
| Date: | 2019-03-26 15:22:09 |
| Message-ID: | 20190326152209.GA16374@alvherre.pgsql |
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| Lists: | pgsql-committers pgsql-hackers |
On 2019-Mar-26, Andrew Dunstan wrote:
> On 3/25/19 8:44 AM, Alexander Korotkov wrote:
> > Get rid of backtracking in jsonpath_scan.l
> >
> > Non-backtracking flex parsers work faster than backtracking ones. So, this
> > commit gets rid of backtracking in jsonpath_scan.l. That required explicit
> > handling of some cases as well as manual backtracking for some cases. More
> > regression tests for numerics are added.
>
> jacana appears to be having trouble with this:
>
>
> 2019-03-26 00:49:02.208 EDT [5c99ae9e.20cc:6] LOG: server process (PID 8368) was terminated by exception 0xC0000028
0xC0000028 is STATUS_BAD_STACK, per
https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/596a1078-e883-4972-9bbc-49e60bebca55
Not sure how credible/useful a stack trace is going to be.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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