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| author | Alexander Korotkov <akorotkov@postgresql.org> | 2023-03-23 00:12:00 +0300 |
|---|---|---|
| committer | Alexander Korotkov <akorotkov@postgresql.org> | 2023-03-23 00:26:59 +0300 |
| commit | 764da7710bf68eebb2c0facb2f871bc3c7a705b6 (patch) | |
| tree | 73541ba0a7ed28fdb43f856d55e2590a72222495 /src/backend/executor/nodeHashjoin.c | |
| parent | c75a623304bc361b4456f916d455ea175ffd8055 (diff) | |
| download | postgresql-764da7710bf68eebb2c0facb2f871bc3c7a705b6.tar.gz postgresql-764da7710bf68eebb2c0facb2f871bc3c7a705b6.zip | |
Evade extra table_tuple_fetch_row_version() in ExecUpdate()/ExecDelete()
When we lock tuple using table_tuple_lock() then we at the same time fetch
the locked tuple to the slot. In this case we can skip extra
table_tuple_fetch_row_version() thank to we've already fetched the 'old' tuple
and nobody can change it concurrently since it's locked.
Discussion: https://postgr.es/m/CAPpHfdua-YFw3XTprfutzGp28xXLigFtzNbuFY8yPhqeq6X5kg%40mail.gmail.com
Reviewed-by: Aleksander Alekseev, Pavel Borisov, Vignesh C, Mason Sharp
Reviewed-by: Andres Freund, Chris Travers
Diffstat (limited to 'src/backend/executor/nodeHashjoin.c')
0 files changed, 0 insertions, 0 deletions