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Code Issues

Corrections for v2.0 and above.

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This commit is contained in:
dimitr 2007-07-03 12:10:22 +00:00
parent ea2fd6ac42
commit 1c5c4e0feb
1 changed files with 5 additions and 3 deletions
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8
doc/sql.extensions/README.order_by_expressions_nulls
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@ -18,7 +18,7 @@ nulls_placement : NULLS FIRST | NULLS LAST;
it is interpreted as column number. The nulls_placement clause
controls ordering of nulls in result set. They can be sorted
either above (NULLS FIRST) or below (NULLS LAST) of all other values.
Behaviour when nulls_placement is unspecified is NULLS LAST.
Behaviour when nulls_placement is unspecified is NULLS FIRST.
Author:
Nickolay Samofatov <skidder@bssys.com>
@ -27,8 +27,10 @@ Author:
N O T E S
=========
- Index is never used for ordering if you specify NULLS FIRST
as a nulls_placement
- If you override the default nulls placement, no index can be used
for sorting. That is, no index will be used for an ASCENDING sort
if NULLS LAST is specified, nor for a DESCENDING sort
if NULLS FIRST is specified.
- Results are undefined if you ask engine to sort results using
non-deterministic UDF or stored procedure.
- Amount of procedure invocations is undefined if you ask engine to