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Code Issues Releases Wiki Activity

Update comments.

This commit is contained in:
Tom Lane 2000-07-25 04:30:42 +00:00
parent b9e6f068dc
commit da1ad323b7
1 changed files with 6 additions and 4 deletions
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10
src/backend/optimizer/path/indxpath.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.87 2000/07/13 05:47:29 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.88 2000/07/25 04:30:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -461,9 +461,11 @@ extract_or_indexqual_conditions(RelOptInfo *rel,
* Returns a list of all the RestrictInfo nodes for clauses that can be
* used with this index.
*
* The list is ordered by index key (but as far as I can tell, this is
* an implementation artifact of this routine, and is not depended on by
* any user of the returned list --- tgl 7/99).
* The list is ordered by index key. (This is not depended on by any part
* of the planner, as far as I can tell; but some parts of the executor
* do assume that the indxqual list ultimately delivered to the executor
* is so ordered. One such place is _bt_orderkeys() in the btree support.
* Perhaps that ought to be fixed someday --- tgl 7/00)
*
* Note that in a multi-key index, we stop if we find a key that cannot be
* used with any clause. For example, given an index on (A,B,C), we might