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Change RENAME behavior when src and dst keys are the same.

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Fixes issue #2392.
This commit is contained in:
antirez 2015-02-23 11:24:24 +01:00
parent 0aa5acc8f3
commit fc365a3a00
2 changed files with 21 additions and 6 deletions
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14
src/db.c
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@ -688,16 +688,20 @@ void shutdownCommand(redisClient *c) {
void renameGenericCommand(redisClient *c, int nx) {
robj *o;
long long expire;
int samekey = 0;
/* To use the same key as src and dst is probably an error */
if (sdscmp(c->argv[1]->ptr,c->argv[2]->ptr) == 0) {
addReply(c,shared.sameobjecterr);
return;
}
/* When source and dest key is the same, no operation is performed,
* if the key exists, however we still return an error on unexisting key. */
if (sdscmp(c->argv[1]->ptr,c->argv[2]->ptr) == 0) samekey = 1;
if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.nokeyerr)) == NULL)
return;
if (samekey) {
addReply(c,nx ? shared.czero : shared.ok);
return;
}
incrRefCount(o);
expire = getExpire(c->db,c->argv[1]);
if (lookupKeyWrite(c->db,c->argv[2]) != NULL) {

13
tests/unit/basic.tcl
View File

@ -368,7 +368,18 @@ start_server {tags {"basic"}} {
format $err
} {ERR*}
test {RENAME where source and dest key is the same} {
test {RENAME where source and dest key are the same (existing)} {
r set mykey foo
r rename mykey mykey
} {OK}
test {RENAMENX where source and dest key are the same (existing)} {
r set mykey foo
r renamenx mykey mykey
} {0}
test {RENAME where source and dest key are the same (non existing)} {
r del mykey
catch {r rename mykey mykey} err
format $err
} {ERR*}