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Implement ORDER BY DESC optimization, which reads values in descending

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order directly from the index instead of using a filesort.
This commit is contained in:
tim@white.box
2001-06-28 03:06:23 -04:00
parent 85388703c4
commit 5ed2cf7dbe
8 changed files with 263 additions and 6 deletions
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4
mysql-test/mysql-test-run.sh
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@@ -250,7 +250,7 @@ fi
[ -z "$COLUMNS" ] && COLUMNS=80
E=`$EXPR $COLUMNS - 8`
#DASH72=`expr substr '------------------------------------------------------------------------' 1 $E`
#DASH72=`$EXPR substr '------------------------------------------------------------------------' 1 $E`
DASH72=`$ECHO '------------------------------------------------------------------------'|$CUT -c 1-$E`
# on source dist, we pick up freshly build executables
@@ -667,7 +667,7 @@ run_testcase ()
slave_init_script=$TESTDIR/$tname-slave.sh
slave_master_info_file=$TESTDIR/$tname-slave-master-info.opt
SKIP_SLAVE=`$EXPR \( $tname : rpl \) = 0`
if [ -n $SKIP_TEST ] ; then
if [ -n "$SKIP_TEST" ] ; then
SKIP_THIS_TEST=`$EXPR \( $tname : "$SKIP_TEST" \) != 0`
if [ x$SKIP_THIS_TEST = x1 ] ;
then