DISCARD
Discards a transaction.
Browse all commands · Upstream source documentation
| Reference field | Value |
|---|---|
| Canonical name | DISCARD |
| Catalog group | Transaction commands |
| Upstream since | 2.0.0 — upstream Redis/module version, not an ffkv release |
| Pinned catalog | Redis 8.10.0 |
Syntax
Section titled “Syntax”DISCARDffkv behavior and limits
Section titled “ffkv behavior and limits”Use one persistent connection for MULTI/EXEC and WATCH. Runtime command errors do not roll back earlier effects. Blocking list/stream commands do not wait inside EXEC. A disconnected client cannot infer whether a submitted write committed.
Source: README.md:389–419, 125; tests/bdd/features/transactions.feature; tests/bdd/features/transactions_runtime.feature.
All requests share the 8 MiB framing/1,024-argument ingress limit; normal RESP replies have 64 MiB wire/logical budgets with bounded nesting/value counts. Management and Lua origins impose smaller budgets. These are not a process RSS cap. Catalog inclusion is not exhaustive option or wire-format parity. See limits and compatibility.
Upstream metadata
Section titled “Upstream metadata”The following fields come from the pinned Redis metadata, not measured ffkv performance or an assertion that ffkv enforces every upstream flag. Running COMMAND INFO/COMMAND DOCS describe the current engine.
Upstream Redis complexity: O(N), when N is the number of queued commands
Upstream arity: 1 (includes the command name; a negative number is a minimum).
Command flags: NOSCRIPT, LOADING, STALE, FAST, ALLOW_BUSY.
ACL categories: TRANSACTION.
Additional pinned upstream metadata
{ "group": "transactions", "since": "2.0.0"}Metadata source · Local snapshot: src/command_metadata.json, key discard.
BDD coverage and source examples
Section titled “BDD coverage and source examples”These are source observations, not a test run performed by this documentation build. A tag identifies scenario intent; an extracted vector identifies a command invocation, which may intentionally produce an error. Scenarios may require setup, multiple connections, persistence, cluster nodes or native-module fixtures.
- Discarded transactions never discard prepared definitions —
tests/bdd/features/hashes.feature:1229; invocation observed. - DISCARD removes the queue and watches but not committed values —
tests/bdd/features/transactions.feature:168; command tag and invocation observed.
Extracted command vectors
Section titled “Extracted command vectors”The following JSON arrays are the test harness’s argument vectors, not shell commands. Numeric arguments are converted by the harness; objects of the form {"base64":"…"} represent decoded binary bytes, not a literal JSON command argument. Preserve scenario setup and connection ordering. See the CLI guide for shell quoting and binary stdin. No reply is invented or inferred.
DISCARD removes the queue and watches but not committed values — tests/bdd/features/transactions.feature:198 (client “buyer” executes:)
[ "DISCARD"]Next source assertion: the reply equals:
"OK"