state: native bulk ops and DeleteWithPrefix

[JoshVanL]

Improves the workflow and actor state paths by cutting avoidable round trips on the backends most commonly used with Dapr workflows. Each change is additive; existing call sites and defaults are unchanged.

postgresql/v2:

• Native BulkSet using a single multi-row UPSERT over UNNEST arrays (keys, values, TTL seconds). TTL is computed server-side via now() + make_interval(secs => $n) so expires_at has the same semantics as doSet's
  single-item path. Validates each request through state.CheckRequestOptions and rejects empty keys, matching the per-item path. Falls back to the default per-item path when any request carries an ETag or
  first-write concurrency option — per-row CAS can't be expressed as a multi-row upsert without losing atomicity.
• Native BulkDelete with key = ANY($1), same ETag fallback; rejects empty keys.
• DeleteWithPrefix — single DELETE ... WHERE key LIKE $1 server-side. LIKE metacharacters (%, _, ) in the caller-supplied prefix are escaped so a prefix containing them cannot widen the delete set.
• Advertises FeatureDeleteWithPrefix.

sqlserver/v2:

• Native BulkGet builds a dynamic IN clause chunked at 2000 parameters (SQL Server's 2100-parameter ceiling with headroom). [Key] is in the SELECT projection so rows map back to request order without relying on
  driver row ordering. Duplicate keys in the input are supported — the implementation fetches distinct keys over the wire and builds the response by iterating the original request slice, so every occurrence receives
  the same data.
• DeleteWithPrefix — single DELETE ... WHERE [Key] LIKE @Prefix ESCAPE ''. Metacharacters (%, _, [, ], ) are escaped.
• Advertises FeatureDeleteWithPrefix.

mysql:

• DeleteWithPrefix — single DELETE ... WHERE id LIKE ?. LIKE metacharacters are escaped; relies on MySQL's default \ LIKE escape char (no explicit ESCAPE clause needed since parameter binding delivers the pattern
  verbatim).
• Advertises FeatureDeleteWithPrefix.

sqlite:

• DeleteWithPrefix threaded through the DBAccess interface and exposed on the store. Single DELETE ... WHERE key LIKE ? ESCAPE '' (SQLite has no default LIKE escape char, so the clause is required).
• Advertises FeatureDeleteWithPrefix.

etcd:

• Native BulkGet batches N OpGet into a single Txn RPC, respecting the configured maxTxnOps by chunking serially with a fresh per-chunk timeout context.
• DeleteWithPrefix — single server-side range delete via client.Delete(prefix, WithPrefix()).
• Advertises FeatureDeleteWithPrefix.

in-memory:

• DeleteWithPrefix simplified to match the server-side prefix semantics (straight HasPrefix match, no separator filter).

Conformance / certification:

• tests/conformance/state/state.go — the delete with prefix case now exercises the server-side prefix contract (keys whose names begin with the supplied prefix are all removed, including nested-looking keys
  sharing that prefix; unrelated keys whose names merely contain the prefix as a substring are unaffected).
• tests/config/state/tests.yml — opts postgresql.v2., mysql., sqlite, etcd.v1/v2, and sqlserver.v2(.docker) into the existing delete-with-prefix conformance operation, so all the new implementations are
  exercised end-to-end against the docker-compose'd backends.

Semantics note:

• DeleteWithPrefix is defined as a literal-prefix server-side delete on every backend. The caller is expected to pass a fully-qualified prefix ending with DaprSeparator (||) — typically the actor's composite key
  appID||actorType||actorID|| — and every key beginning with that prefix is removed. LIKE metacharacters in the prefix are always escaped so they match literally.

[Copilot]

Pull request overview

This PR adds native bulk operations and DeleteWithPrefix support across multiple state backends to reduce round trips in workflow/actor state paths, while keeping existing call sites and defaults unchanged.

Changes:

• Implement native bulk operations (notably Postgres v2 BulkSet/BulkDelete, SQL Server v2 BulkGet, etcd BulkGet) to cut backend round trips.
• Add DeleteWithPrefix implementations matching the in-memory “direct children only” semantics and advertise FeatureDeleteWithPrefix across supported backends.
• Extend unit/config coverage to exercise feature advertising and empty-input short-circuits.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/config/state/tests.yml	Enables delete-with-prefix in the conformance test matrix for supported components.
state/sqlserver/v2/sqlserver.go	Adds BulkGet (chunked IN clause) and DeleteWithPrefix; advertises the feature.
state/sqlserver/v2/sqlserver_test.go	Adds tests for feature advertisement and empty BulkGet short-circuit.
state/sqlite/sqlite_dbaccess.go	Threads DeleteWithPrefix through DBAccess and implements SQL deletion logic.
state/sqlite/sqlite.go	Exposes DeleteWithPrefix on the store and advertises the feature.
state/sqlite/sqlite_test.go	Adds routing/feature tests and extends the fake DBAccess.
state/postgresql/v2/postgresql.go	Adds native BulkSet, native BulkDelete, DeleteWithPrefix, and advertises the feature.
state/postgresql/v2/bulk_test.go	Adds unit tests for short-circuiting and feature advertisement (and a fallback-path test).
state/mysql/mysql.go	Adds DeleteWithPrefix and advertises the feature.
state/mysql/mysql_test.go	Adds tests validating DeleteWithPrefix query semantics and feature advertisement.
state/etcd/etcd.go	Adds native BulkGet, DeleteWithPrefix, and advertises the feature.
state/etcd/etcd_test.go	Adds tests for empty BulkGet short-circuit and feature advertisement.

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 7 comments.

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