Horton

Re: [HACKERS] Preserving param location

Julien Rouhaud <rjuju123@gmail.com>

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From: Julien Rouhaud <rjuju123@gmail.com>
To: pgsql-hackers@lists.postgresql.org
Date: 2021-06-27T03:31:53Z
Lists: pgsql-hackers 
On Sat, Mar 11, 2017 at 11:09:32PM +0100, Julien Rouhaud wrote:
> 
> When a query contains parameters, the original param node contains the token
> location.  However, this information is lost when the Const node is generated,
> this one will only contain position -1 (unknown).
>
> FWIW, we do have a use case for this (custom extension that tracks quals
> statistics, which among other thing is used to regenerate query string from a
> pgss normalized query, thus needing the original param location).

rebased v2.

Commits

  1. Copy a Param's location field when replacing it with a Const.