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| author | Daniel Gustafsson <dgustafsson@postgresql.org> | 2021-08-27 16:24:33 +0200 |
|---|---|---|
| committer | Daniel Gustafsson <dgustafsson@postgresql.org> | 2021-08-27 16:24:33 +0200 |
| commit | d782d5987e1022ba70171bcf3507cd87564ef23c (patch) | |
| tree | 5af5cf4046b508b07dabb03a9c272c906f049358 /src/backend/regex/regcomp.c | |
| parent | abc0910e2e0adfc5a17e035465ee31242e32c4fc (diff) | |
| download | postgresql-d782d5987e1022ba70171bcf3507cd87564ef23c.tar.gz postgresql-d782d5987e1022ba70171bcf3507cd87564ef23c.zip | |
Avoid invoking PQfnumber in loop constructs
When looping over the resultset from a SQL query, extracting the field
number before the loop body to avoid repeated calls to PQfnumber is an
established pattern. On very wide tables this can have a performance
impact, but it wont be noticeable in the common case. This fixes a few
queries which were extracting the field number in the loop body.
Author: Hou Zhijie <houzj.fnst@fujitsu.com>
Reviewed-by: Nathan Bossart <bossartn@amazon.com>
Discussion: https://postgr.es/m/OS0PR01MB57164C392783F29F6D0ECA0B94139@OS0PR01MB5716.jpnprd01.prod.outlook.com
Diffstat (limited to 'src/backend/regex/regcomp.c')
0 files changed, 0 insertions, 0 deletions