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Fixed SORT bugs (issue #224) with regression tests.

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This commit is contained in:
antirez 2011-12-01 16:07:55 +01:00
parent 1576520cc0
commit 237194b760
2 changed files with 21 additions and 12 deletions
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21
src/sort.c
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@ -141,11 +141,7 @@ void sortCommand(redisClient *c) {
/* Lookup the key to sort. It must be of the right types */
sortval = lookupKeyRead(c->db,c->argv[1]);
if (sortval == NULL) {
addReply(c,shared.emptymultibulk);
return;
}
if (sortval->type != REDIS_SET && sortval->type != REDIS_LIST &&
if (sortval && sortval->type != REDIS_SET && sortval->type != REDIS_LIST &&
sortval->type != REDIS_ZSET)
{
addReply(c,shared.wrongtypeerr);
@ -161,7 +157,10 @@ void sortCommand(redisClient *c) {
/* Now we need to protect sortval incrementing its count, in the future
* SORT may have options able to overwrite/delete keys during the sorting
* and the sorted key itself may get destroied */
incrRefCount(sortval);
if (sortval)
incrRefCount(sortval);
else
sortval = createListObject();
/* The SORT command has an SQL-alike syntax, parse it */
while(j < c->argc) {
@ -200,7 +199,8 @@ void sortCommand(redisClient *c) {
}
/* Destructively convert encoded sorted sets for SORT. */
if (sortval->type == REDIS_ZSET) zsetConvert(sortval, REDIS_ENCODING_SKIPLIST);
if (sortval->type == REDIS_ZSET)
zsetConvert(sortval, REDIS_ENCODING_SKIPLIST);
/* Load the sorting vector with all the objects to sort */
switch(sortval->type) {
@ -367,12 +367,9 @@ void sortCommand(redisClient *c) {
}
}
}
setKey(c->db,storekey,sobj);
if (outputlen) setKey(c->db,storekey,sobj);
decrRefCount(sobj);
/* Note: we add 1 because the DB is dirty anyway since even if the
* SORT result is empty a new key is set and maybe the old content
* replaced. */
server.dirty += 1+outputlen;
server.dirty += outputlen;
addReplyLongLong(c,outputlen);
}

12
tests/unit/sort.tcl
View File

@ -134,6 +134,18 @@ start_server {
assert_equal [lsort -real $floats] [r sort mylist]
}
test "SORT with STORE returns zero if result is empty (github isse 224)" {
r flushdb
r sort foo store bar
} {0}
test "SORT with STORE does not create empty lists (github issue 224)" {
r flushdb
r lpush foo bar
r sort foo limit 10 10 store zap
r exists zap
} {0}
tags {"slow"} {
set num 100
set res [create_random_dataset $num lpush]