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Refactor CopyFrom() in copyfrom.c.

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This commit simplifies CopyFrom() by removing the unnecessary local variable
'skipped', which tracked the number of rows skipped due to on_error = 'ignore'.
That count is already handled by cstate->num_errors, so the 'skipped' variable
was redundant.

Additionally, the condition on_error != COPY_ON_ERROR_STOP is removed.
Since on_error == COPY_ON_ERROR_IGNORE is already checked, and on_error
only has two values (ignore and stop), the additional check was redundant
and made the logic harder to read. Seemingly this was introduced
in preparation for a future patch, but the current checks don’t offer
clear value and have been removed to improve readability.

Author: Atsushi Torikoshi
Reviewed-by: Masahiko Sawada, Fujii Masao
Discussion: https://postgr.es/m/ab59dad10490ea3734cf022b16c24cfd@oss.nttdata.com
This commit is contained in:
Fujii Masao 2024-10-03 15:59:16 +09:00
parent a1c4c8a9e1
commit e55f025b05
1 changed files with 8 additions and 13 deletions
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21
src/backend/commands/copyfrom.c
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@ -657,7 +657,6 @@ CopyFrom(CopyFromState cstate)
CopyMultiInsertInfo multiInsertInfo = {0}; /* pacify compiler */
int64 processed = 0;
int64 excluded = 0;
int64 skipped = 0;
bool has_before_insert_row_trig;
bool has_instead_insert_row_trig;
bool leafpart_use_multi_insert = false;
@ -1004,26 +1003,22 @@ CopyFrom(CopyFromState cstate)
if (!NextCopyFrom(cstate, econtext, myslot->tts_values, myslot->tts_isnull))
break;
if (cstate->opts.on_error != COPY_ON_ERROR_STOP &&
if (cstate->opts.on_error == COPY_ON_ERROR_IGNORE &&
cstate->escontext->error_occurred)
{
/*
* Soft error occurred, skip this tuple and deal with error
* information according to ON_ERROR.
* Soft error occurred, skip this tuple and just make
* ErrorSaveContext ready for the next NextCopyFrom. Since we
* don't set details_wanted and error_data is not to be filled,
* just resetting error_occurred is enough.
*/
if (cstate->opts.on_error == COPY_ON_ERROR_IGNORE)
/*
* Just make ErrorSaveContext ready for the next NextCopyFrom.
* Since we don't set details_wanted and error_data is not to
* be filled, just resetting error_occurred is enough.
*/
cstate->escontext->error_occurred = false;
cstate->escontext->error_occurred = false;
/* Report that this tuple was skipped by the ON_ERROR clause */
pgstat_progress_update_param(PROGRESS_COPY_TUPLES_SKIPPED,
++skipped);
cstate->num_errors);
/* Repeat NextCopyFrom() until no soft error occurs */
continue;
}