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Fix EXPLAIN MERGE output when no tuples are processed

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An 'else' clause was misplaced in commit 598ac10be1, making zero-rows
output look a bit silly.  Add a test case for it.

Pointed out by Tom Lane.

Discussion: https://postgr.es/m/21030.1652893083@sss.pgh.pa.us
This commit is contained in:
Alvaro Herrera
2022-05-18 21:20:49 +02:00
parent 0fbf011200
commit 12e423e21d
3 changed files with 41 additions and 14 deletions
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27
src/backend/commands/explain.c
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@ -4068,19 +4068,22 @@ show_modifytable_info(ModifyTableState *mtstate, List *ancestors,
skipped_path = total - insert_path - update_path - delete_path;
Assert(skipped_path >= 0);
if (es->format == EXPLAIN_FORMAT_TEXT && total > 0)
if (es->format == EXPLAIN_FORMAT_TEXT)
{
ExplainIndentText(es);
appendStringInfoString(es->str, "Tuples:");
if (insert_path > 0)
appendStringInfo(es->str, " inserted=%.0f", insert_path);
if (update_path > 0)
appendStringInfo(es->str, " updated=%.0f", update_path);
if (delete_path > 0)
appendStringInfo(es->str, " deleted=%.0f", delete_path);
if (skipped_path > 0)
appendStringInfo(es->str, " skipped=%.0f", skipped_path);
appendStringInfoChar(es->str, '\n');
if (total > 0)
{
ExplainIndentText(es);
appendStringInfoString(es->str, "Tuples:");
if (insert_path > 0)
appendStringInfo(es->str, " inserted=%.0f", insert_path);
if (update_path > 0)
appendStringInfo(es->str, " updated=%.0f", update_path);
if (delete_path > 0)
appendStringInfo(es->str, " deleted=%.0f", delete_path);
if (skipped_path > 0)
appendStringInfo(es->str, " skipped=%.0f", skipped_path);
appendStringInfoChar(es->str, '\n');
}
}
else
{