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Fix incorrect IndexOptInfo header comment

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The comment incorrectly indicated that indexcollations[] stored
collations for both key columns and INCLUDE columns, but in reality it
only has elements for the key columns.  canreturn[] didn't get a mention,
so add that while we're here.

Author: Junwang Zhao <zhjwpku@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/CAEG8a3LwbZgMKOQ9CmZarX5DEipKivdHp5PZMOO-riL0w%3DL%3D4A%40mail.gmail.com
Backpatch-through: 14
This commit is contained in:
David Rowley
2025-11-24 17:02:24 +13:00
parent 035a1f5aca
commit ea36c2f6a9
1 changed files with 4 additions and 3 deletions
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7
src/include/nodes/pathnodes.h
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@@ -796,9 +796,10 @@ typedef struct RelOptInfo
* IndexOptInfo
* Per-index information for planning/optimization
*
* indexkeys[], indexcollations[] each have ncolumns entries.
* opfamily[], and opcintype[] each have nkeycolumns entries. They do
* not contain any information about included attributes.
* indexkeys[] and canreturn[] each have ncolumns entries.
*
* indexcollations[], opfamily[], and opcintype[] each have nkeycolumns
* entries. These don't contain any information about INCLUDE columns.
*
* sortopfamily[], reverse_sort[], and nulls_first[] have
* nkeycolumns entries, if the index is ordered; but if it is unordered,