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EXISTS is now variadic.

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The new return value is the number of keys existing, among the ones
specified in the command line, counting the same key multiple times if
given multiple times (and if it exists).

See PR #2667.
This commit is contained in:
antirez 2015-07-13 18:06:24 +02:00
parent 5c4fcaf3fe
commit 4c7ee0d584
2 changed files with 10 additions and 6 deletions
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14
src/db.c
View File

@ -318,13 +318,17 @@ void delCommand(redisClient *c) {
addReplyLongLong(c,deleted);
}
/* EXISTS key1 key2 ... key_N.
* Return value is the number of keys existing. */
void existsCommand(redisClient *c) {
expireIfNeeded(c->db,c->argv[1]);
if (dbExists(c->db,c->argv[1])) {
addReply(c, shared.cone);
} else {
addReply(c, shared.czero);
long long count = 0;
int j;
for (j = 1; j < c->argc; j++) {
expireIfNeeded(c->db,c->argv[j]);
if (dbExists(c->db,c->argv[j])) count++;
}
addReplyLongLong(c,count);
}
void selectCommand(redisClient *c) {

2
src/redis.c
View File

@ -132,7 +132,7 @@ struct redisCommand redisCommandTable[] = {
{"append",appendCommand,3,"wm",0,NULL,1,1,1,0,0},
{"strlen",strlenCommand,2,"rF",0,NULL,1,1,1,0,0},
{"del",delCommand,-2,"w",0,NULL,1,-1,1,0,0},
{"exists",existsCommand,2,"rF",0,NULL,1,1,1,0,0},
{"exists",existsCommand,-2,"rF",0,NULL,1,-1,1,0,0},
{"setbit",setbitCommand,4,"wm",0,NULL,1,1,1,0,0},
{"getbit",getbitCommand,3,"rF",0,NULL,1,1,1,0,0},
{"setrange",setrangeCommand,4,"wm",0,NULL,1,1,1,0,0},