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Update some comments that should've covered MERGE

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Oversight in 7103ebb7aa.  Backpatch to 15.

Author: Richard Guo <guofenglinux@gmail.com>
Discussion: https://postgr.es/m/CAMbWs48gnDjZXq3-b56dVpQCNUJ5hD9kdtWN4QFwKCEapspNsA@mail.gmail.com
This commit is contained in:
Alvaro Herrera
2022-10-24 12:52:43 +02:00
parent 8328a15f8f
commit 3b2db22fe2
14 changed files with 42 additions and 34 deletions
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6
src/backend/optimizer/util/appendinfo.c
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@@ -730,7 +730,7 @@ find_appinfos_by_relids(PlannerInfo *root, Relids relids, int *nappinfos)
/*
* add_row_identity_var
* Register a row-identity column to be used in UPDATE/DELETE.
* Register a row-identity column to be used in UPDATE/DELETE/MERGE.
*
* The Var must be equal(), aside from varno, to any other row-identity
* column with the same rowid_name. Thus, for example, "wholerow"
@@ -909,8 +909,8 @@ add_row_identity_columns(PlannerInfo *root, Index rtindex,
* distribute_row_identity_vars
*
* After we have finished identifying all the row identity columns
* needed by an inherited UPDATE/DELETE query, make sure that these
* columns will be generated by all the target relations.
* needed by an inherited UPDATE/DELETE/MERGE query, make sure that
* these columns will be generated by all the target relations.
*
* This is more or less like what build_base_rel_tlists() does,
* except that it would not understand what to do with ROWID_VAR Vars.