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148 lines
4.5 KiB
148 lines
4.5 KiB
{
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"XADD": {
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"summary": "Appends a new entry to a stream",
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"complexity": "O(1) when adding a new entry, O(N) when trimming where N being the number of entries evicted.",
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"group": "stream",
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"since": "5.0.0",
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"arity": -5,
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"function": "xaddCommand",
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"history": [
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[
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"6.2.0",
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"Added the `NOMKSTREAM` option, `MINID` trimming strategy and the `LIMIT` option."
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],
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[
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"7.0.0",
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"Added support for the `<ms>-*` explicit ID form."
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]
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],
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"command_flags": [
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"WRITE",
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"DENYOOM",
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"FAST"
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],
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"acl_categories": [
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"STREAM"
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],
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"command_tips": [
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"NONDETERMINISTIC_OUTPUT"
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],
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"key_specs": [
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{
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"notes": "UPDATE instead of INSERT because of the optional trimming feature",
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"flags": [
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"RW",
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"UPDATE"
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],
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"begin_search": {
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"index": {
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"pos": 1
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}
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},
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"find_keys": {
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"range": {
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"lastkey": 0,
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"step": 1,
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"limit": 0
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}
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}
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}
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],
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"arguments": [
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{
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"name": "key",
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"type": "key",
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"key_spec_index": 0
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},
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{
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"token": "NOMKSTREAM",
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"name": "nomkstream",
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"type": "pure-token",
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"optional": true,
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"since": "6.2.0"
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},
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{
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"name": "trim",
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"type": "block",
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"optional": true,
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"arguments": [
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{
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"name": "strategy",
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"type": "oneof",
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"arguments": [
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{
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"name": "maxlen",
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"type": "pure-token",
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"token": "MAXLEN"
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},
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{
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"name": "minid",
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"type": "pure-token",
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"token": "MINID",
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"since": "6.2.0"
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}
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]
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},
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{
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"name": "operator",
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"type": "oneof",
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"optional": true,
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"arguments": [
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{
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"name": "equal",
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"type": "pure-token",
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"token": "="
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},
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{
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"name": "approximately",
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"type": "pure-token",
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"token": "~"
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}
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]
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},
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{
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"name": "threshold",
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"type": "string"
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},
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{
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"token": "LIMIT",
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"name": "count",
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"type": "integer",
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"optional": true,
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"since": "6.2.0"
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}
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]
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},
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{
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"name": "id_or_auto",
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"type": "oneof",
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"arguments": [
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{
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"name": "auto_id",
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"type": "pure-token",
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"token": "*"
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},
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{
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"name": "ID",
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"type": "string"
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}
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]
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},
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{
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"name": "field_value",
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"type": "block",
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"multiple": true,
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"arguments": [
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{
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"name": "field",
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"type": "string"
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},
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{
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"name": "value",
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"type": "string"
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}
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]
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}
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]
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}
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}
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