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{
"XREAD": {
"summary": "Return never seen elements in multiple streams, with IDs greater than the ones reported by the caller for each stream. Can block.",
"complexity": "For each stream mentioned: O(N) with N being the number of elements being returned, it means that XREAD-ing with a fixed COUNT is O(1). Note that when the BLOCK option is used, XADD will pay O(M) time in order to serve the M clients blocked on the stream getting new data.",
"group": "stream",
"since": "5.0.0",
"arity": -4,
"function": "xreadCommand",
"get_keys_function": "xreadGetKeys",
"command_flags": [
"BLOCKING",
"READONLY",
"BLOCKING"
],
"acl_categories": [
"STREAM"
],
"key_specs": [
{
"flags": [
"RO",
"ACCESS"
],
"begin_search": {
"keyword": {
"keyword": "STREAMS",
"startfrom": 1
}
},
"find_keys": {
"range": {
"lastkey": -1,
"step": 1,
"limit": 2
}
}
}
],
"arguments": [
{
"token": "COUNT",
"name": "count",
"type": "integer",
"optional": true
},
{
"token": "BLOCK",
"name": "milliseconds",
"type": "integer",
"optional": true
},
{
"name": "streams",
"token": "STREAMS",
"type": "block",
"arguments": [
{
"name": "key",
"type": "key",
"key_spec_index": 0,
"multiple": true
},
{
"name": "ID",
"type": "string",
"multiple": true
}
]
}
]
}
}
|
