Changelog

Copy Markdown View Source

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Changed

  • Client.Local ordered aggregates now use the InfluxDB v3 SQL spelling (#13). first_value(field ORDER BY col [ASC|DESC]) and last_value(field ORDER BY col [ASC|DESC]) are parsed and executed, including GROUP BY <columns> for "latest value per group" queries. The InfluxQL-style FIRST(field, time) / LAST(field, time) the double previously accepted are rejected: InfluxDB v3 fails planning on them (Invalid function 'last'), so accepting them let a query pass tests and 400 in production. The rejection names the v3 spelling. first_value/last_value without an inner ORDER BY are also rejected — DataFusion returns an arbitrary group member in that case, which the double cannot reproduce. Verified against a live InfluxDB 3 Core; the shared contract suite now passes against the real engine (it previously failed on the two FIRST/LAST tests).
  • Client.Local parser rejections are prefixed Client.Local: so an unsupported column expression error reads as a limitation of the test double rather than of InfluxDB. Plain aggregates (AVG, SUM, COUNT, MIN, MAX) now reject a second argument, as the real engine does.
  • Client.Local reports a missing table the way the real engine does. query_sql/3 on an unknown measurement returned {:error, {:table_not_found, name}} while Client.HTTP returns {:error, %{status: 400, body: "Error during planning: table ... not found"}}, and the streaming path mapped it to a 404. Both now produce the 400 planning error, so consumer code that matches %{status: 400} can be exercised against the double. Code matching the old tuple must be updated.

Fixed

  • BatchWriter now honours its :database option. The value was stored in state and never forwarded to the write, so every flush landed in the connection's default database. It is now the write target unless :write_opts names a :database explicitly.
  • Client.Local (:v2 profile) accepts writes to buckets created with create_bucket/3. Writes only checked the databases: seeded at start, so a bucket created through the API returned 404 database not found.
  • Client.Local no longer re-types quoted string literals (#12). A bound string param or quoted literal such as '08338636' was parsed back through Integer.parse, dropping the leading zero and changing the type, so WHERE repcode = $rc / IN ($rc) over zero-padded identifiers never matched while real InfluxDB v3 matched correctly. Quoted literals are now strings; only bare literals are typed. Comparing a string literal against a numeric field compares the field's text rendering, which is what DataFusion does (amount >= '1000.00' is lexical and matches 500.0 on the real engine too), so that footgun now fails in tests the same way it fails in production.
  • Linear-time accumulation in Client.Local WHERE parsing and Flight.Reader batch decoding. Both appended with ++ inside a reduce, which is quadratic in the number of clauses / record batches.
  • Client.Local param substitution is whole-placeholder and single-pass. $h was previously replaced inside $hmin, and a substituted string value containing another placeholder's name could be re-substituted.
  • query_sql_stream/3 (HTTP transport) now truly streams and no longer swallows errors (#10). Previously it used Finch.request/3, which buffered the entire response body and eagerly decoded every JSONL line before yielding — giving zero memory benefit over query_sql/3 — and it halted to an empty list on non-2xx statuses, transport errors, and unresolved databases, so every failure class looked like "zero rows". It now consumes the response with Finch.stream/5, decoding JSONL line-by-line with back-pressure (constant memory), and raises an InfluxElixir.StreamError on a missing database, a non-success HTTP status, or a transport error when the stream is enumerated.
  • InfluxElixir.Client.Local.query_sql_stream/3 now mirrors the HTTP client's error semantics (#11). Client.Local is the documented drop-in test double for Client.HTTP, but it still returned an empty stream on a query error or an unsupported operation while Client.HTTP raised — so consumer code that rescues InfluxElixir.StreamError (to avoid treating an outage as "no data") could not be exercised against the test double. It now raises InfluxElixir.StreamError on enumeration for both cases, matching Client.HTTP.

Added

  • InfluxElixir.StreamError exception, raised while consuming a streaming query that cannot produce rows. Carries a :kind (:no_database | :http_status | :transport | :decode | :unsupported) plus :status/:body/:reason context. InfluxElixir.StreamError.stream/1 builds an Enumerable.t() that defers the raise to enumeration, shared by both client implementations.
  • Tests covering the HTTP :no_database/:transport paths (real Finch pool, no mocking), the Local :http_status/:unsupported paths, lazy (deferred) raising, and StreamError message construction.

[0.1.17] - 2026-06-30

Changed

  • Loosened decimal constraint to ~> 2.0 or ~> 3.0 (#9). Unblocks downstream apps from upgrading past decimal 2.4.1 (EEF-CVE-2026-32686) and from picking up ecto ~> 3.14 → ash ~> 3.29 chains. Surface used (Decimal.to_string/2, %Decimal{} pattern) is stable across 2 → 3.
  • Loosened grpc constraint to ~> 0.11 or ~> 1.0 (#9). Unblocks downstream apps from upgrading past grpc 0.11.5 (5 CVEs including EEF-CVE-2026-48853).
  • Defaulted the Flight client to the Mint gRPC adapter so the library doesn't pull in :gun, which became optional in grpc 1.0. Mint is already available via finch.
  • InfluxElixir.Supervisor now skips adding GRPC.Client.Supervisor as a child when grpc 1.0+ is present (1.0 auto-starts it via its own Application).

Fixed

  • LocalClient now supports COUNT(*) as a scalar and DATE_BIN-bucketed aggregate.
  • LocalClient WHERE-clause parser now returns a 400 error for unrecognised clauses (e.g. LIKE) instead of silently matching all rows.

Added

  • Regression tests for COUNT(*), explicit column-list SELECT, IN operator narrowing, write-timestamp preservation, and silent WHERE drop.

Earlier releases

  • Initial project setup with module stubs
  • CI pipeline with quality checks and auto-publish to Hex.pm