feat(core): pipelined egress reader#146
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Drives non-SELECT statements through the egress channel and verifies the cursor terminates with Terminal::ExecDone (0x16) rather than RESULT_END (0x12). Previously the EXEC_DONE path had unit coverage only -- this confirms the server actually emits 0x16 frames for DDL and DML, that the rows_affected count is correct, and that the cursor lifecycle resets so a follow-up SELECT on the same connection still works. Sequence in one test: - CREATE TABLE: op_type 0x09, rows_affected = 0 - INSERT INTO ... VALUES (...), (...), (...): op_type 0x02, rows_affected = 3 - SELECT (sanity check that the connection is reusable): batches + RESULT_END terminal - DROP TABLE: another EXEC_DONE 55/55 live tests pass. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Cursor auto-emits CREDIT (msg_kind 0x15) after every RESULT_BATCH when the request was started with initial_credit > 0. The additional_bytes value matches the wire size we just consumed (12-byte header + payload_length), the same accounting the server uses to decrement the per-request budget. Mirrors the Java reference's QwpEgressIoThread.sendCredit pattern (line 640-642): "the user is done with the batch, so the recv-buffer bytes are free; tell the server it can stream payloadLen more bytes." reader.rs: - Cursor.credit_enabled set by ReaderQuery::execute from the built QueryRequest's initial_credit - send_credit_frame writes [0x15][i64 LE rid][varint bytes] as a bare client to server message - Wire size captured from FrameHeader BEFORE decode_frame consumes the header - New public Cursor::add_credit(u64) for users who want to grant credit out of band of auto-replenishment Live test: credit_flow_control_keeps_server_streaming - initial_credit = 4 KiB, max_batch_rows = 500, 5000 rows - The 4 KiB budget is much smaller than a single batch's wire size; without CREDIT replenishment the server would only emit the row-floor batch and then pause indefinitely - Test asserts all 5000 rows arrive across 10 batches in under a few seconds. JVM log confirms no stalls. 732 lib + 56 live tests, all green. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Multi-address parsing, walk-on-connect, eager SERVER_INFO consumption,
and target=any/primary/replica role filtering. Mid-query failover
(server crash mid-stream -> reconnect + replay) needs a real cluster
and is left as a TODO; the connect-time walk handles the most-common
case (one endpoint down) and is fully testable against single-node
OSS.
config.rs:
- ReaderConfig.host/port -> ReaderConfig.addrs: Vec<(String, u16)>.
- `addr=h1:9000,h2:9001,h3,h4:9999` parses to 4 endpoints; missing
port falls back to default. Empty entries rejected.
- url() now picks the first endpoint; url_for(idx) builds per-endpoint
URL.
transport.rs:
- WsTransport::connect_to(cfg, idx) takes an explicit endpoint
index. WsTransport::connect stays as the single-addr convenience.
reader.rs:
- Reader::from_config walks cfg.addrs in order. For each:
- WsTransport::connect_to(cfg, idx); transport failures skip to
the next endpoint, last one surfaces if all fail.
- On v2+, eagerly read the unsolicited SERVER_INFO (0x18) frame
and store it. The connection negotiated v1 path keeps Server
Info as None.
- target=any: accept any endpoint. target=primary: accept
Primary / PrimaryCatchup / *Standalone* (matches Java's
matchesTarget so single-node OSS deployments work without
surprise). target=replica: accept only Replica.
- New Reader::server_info() accessor.
- New ErrorCode::RoleMismatch surfaces the "all endpoints connected
but none matched target" case. Distinct from SocketError ("none
reachable") so users can tell the two apart.
Tests, all live against single-node OSS:
- server_info_exposes_role: confirms STANDALONE comes through.
- target_primary_accepts_standalone: STANDALONE counts as primary
(matches Java; OSS users don't have to remember the workaround).
- target_replica_rejects_standalone: with target=replica, no
endpoint matches; assert RoleMismatch with target name in msg.
- multi_addr_walks_past_unreachable_endpoint: first addr is a
non-listening loopback port; second is the live server; the
walk falls through to the live one and queries succeed.
What's NOT in this commit (needs a real cluster):
- Mid-query failover (server crash mid-stream -> auto-reconnect).
- Real PRIMARY vs REPLICA role distinction (single-node always
emits STANDALONE).
Total: 734 lib + 60 live tests, all green.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Three live tests against the real server confirm the array decoder handles every case it'll see in practice. Population mirrors the QuestDB QwpEgressBootstrapTest pattern: SQL INSERT with ARRAY[...] literals against a WAL table, then read back via egress. - double_array_1d_varying_lengths: rows have different-sized 1-D arrays in the same column (3-, 2-, 1-element). Verifies shape() per row, element_count, and element() values across the per-row-shape decoder path. - double_array_2d_row_major: ARRAY[[1.0, 2.0], [3.0, 4.0]] for DOUBLE[][]; verifies shape == [2, 2] / [2, 3] and that flat element ordering is row-major. - double_array_with_null_array_row: insert NULL alongside non-null arrays; verifies the column null bitmap suppresses shape() / element() at the right rows. LONG_ARRAY: not exercised end-to-end because the server doesn't emit it. The decoder + Layer 0 LongArrayColumn stay in place for forward-compat (cheap to maintain, mirrors DoubleArray). Total: 734 lib + 63 live tests, all green. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Twelve new live tests covering boundary values, special values, empty
strings, all-null columns, extreme widths, and 3-D arrays. Each
caught a real server-behaviour quirk worth pinning:
- integer_boundaries: byte/short/int/long at MIN+1, 0, MAX. i32::MIN
is QuestDB's INT NULL sentinel and i64::MIN is the LONG sentinel
-- inserting either rewrites the row to NULL, so the test uses
MIN+1 for the most-negative non-null value at each width.
- double_special_values: NaN, +Infinity, -Infinity, -0.0. QuestDB
treats non-finite doubles as NULL on insert (consistent with the
NaN-as-NULL sentinel) regardless of which SQL literal is used,
so the test accepts null OR the expected bit pattern for those
three rows. -0.0 is finite; just verify it numerically equals 0.
- varchar_empty_string_distinct_from_null: '' decodes to Some(""),
NULL decodes to None. The dense per-row offsets densification
must keep them disjoint -- they do.
- varchar_unicode_and_long_string: emoji + CJK + Hebrew + Hangul
in one literal, plus an 8 KiB ASCII string. Validates the UTF-8
validation pass at decode time and the offsets/data buffer
sizing for non-trivially-large rows.
- all_null_long_column / all_null_varchar_column: every row null.
Varchar exercises the offsets-array densification when every
per-row entry is zero-length.
- timestamp_epoch_and_far_future: 0 (epoch), 1us-after-epoch, year
2099. Negative pre-epoch timestamps would violate WAL designated-
timestamp monotonicity and stay covered by unit tests.
- uuid_all_zeros_and_all_ones: confirms the UUID null sentinel
("both halves Long.MIN_VALUE") doesn't collide with the all-zero
byte pattern, and that the 16-byte FixedBytesColumn read path
preserves every byte.
- long256_distinct_high_low_bytes: 0x0123...cdef pattern across all
32 bytes -- catches any byte-order regression in the 32-byte read
path.
- geohash_multiple_widths: 1c (5 bits/1 byte), 3c (15/2), 7c (35/5),
12c (60/8). Spans every byte_width the geohash decoder reaches.
- double_array_3d: shape [2, 2, 3], 12 row-major elements indexed
flat -- verifies element() ordering on a 3-D array.
- decimal64_zero_and_negative_scale_boundary: scale=0 (decimal(18,0))
and a scale=2 column with 0.00 and -99.99. Confirms the sign and
zero round-trips cleanly through both scale paths.
Total: 734 lib + 75 live tests, all green.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Apply rustfmt and resolve clippy `-D warnings` errors flagged by CI: - div_ceil for ceiling division (bit_reader, binds, decoder) - range contains for inclusive range checks - byte string literals over byte slices - replace needless borrows / conversions / range loops - type aliases for VarlenBuffers / SymbolBuffers to satisfy type_complexity - expect_fun_call replaced with unwrap_or_else
…r conflict The dev-dep ureq with `features = ["rustls"]` pulls in `rustls/ring`, which collides with the `aws-lc-rs` provider when tests run under `--features=aws-lc-crypto`. The fixture only hits `http://localhost` for ping/exec, so plain HTTP (no rustls) is sufficient.
QuestDB master requires JDK 25 (the pom enforcer rejects older versions: `<jdk>(24,)</jdk>`). The Azure pipeline was hardcoded to JDK 17 via Maven@3's `jdkVersionOption: "1.17"`, causing the "Vs QuestDB master" job to fail with "JDK version can't be empty". Download JDK 25 from Adoptium Temurin before the Maven step and point JAVA_HOME at it; switch the Maven task to `jdkVersionOption: "default"` so it picks up the freshly installed JDK.
Switches RESULT_BATCH decoding from owned `Vec<u8>` buffers to ref-counted `bytes::Bytes` slices that borrow into the WebSocket payload buffer (or, under FLAG_ZSTD, into the decompressed body). Eliminates two full-payload memcpys per batch: - Transport: `WsTransport::read_frame` no longer `.to_vec()`s the payload tail. tungstenite 0.27's `Message::Binary(Bytes)` is already ref-counted, so `bytes.slice(HEADER_LEN..)` is just an Arc bump. - Decoder: `densify_fixed`'s no-null path and `decode_varlen`'s data buffer now hold `Bytes` views into the parent payload instead of allocating `Vec<u8>`. Validity bitmaps follow the same path. Paths that have to materialize fresh bytes (BOOLEAN bit-unpack, GORILLA expansion, null-bearing fixed-width densification) wrap the `Vec<u8>` with `Bytes::from(vec)` and pay one allocation rather than two. Measured on a 10M-row × 15-column workload (5 high-cardinality SYMBOLs + 1 VARCHAR + 7 fixed-width + TIMESTAMP) over loopback, M1 macOS, release build: baseline : 11.6M rows/s, 898 MiB/s, 861 ms + transport copy : 12.6M rows/s, 978 MiB/s, 791 ms (+8.8%) + zero-copy decode: 13.3M rows/s, 1026 MiB/s, 754 ms (+14.2%) Also adds `Reader::bytes_received()` for benchmarking and two example binaries: `qwp_egress_latency` (matches the Java JMH single-row latency bench) and `qwp_egress_read_wide` (matches the Java wide-table throughput bench). Adds `bytes = "1.7"` as a direct dependency so the decoder compiles without the `sync-reader-ws` transport feature; tungstenite already re-exports the same type. All 734 lib tests pass under `--features almost-all-features` and across the four `--no-default-features` combos used in CI.
Three more decoder optimizations, on top of the zero-copy slicing in the previous commit. Net effect on the same 10M-row × 15-column workload (loopback, M1, release): 754 ms → ~625 ms total, decoder CPU time 506 ms → ~155 ms. 1. SYMBOL code densification: split out a no-null fast path that inlines the 1-, 2-, and 3-byte LEB128 cases (covers any code up to 2^21, more than enough for the 100k-cardinality test data) into a straight-line loop. The dict-bounds check moves to a single post-pass that auto-vectorizes. Slow path falls back to the generic decoder for over-3-byte values. This was by far the biggest win: dropped per-batch decode CPU from ~500 ms to ~175 ms. 2. VARCHAR offsets: in the no-null path, the densified offset table is bit-for-bit identical to the compact one the wire already provides (`row_count + 1` entries, no holes). Hand the compact `Vec<u32>` straight back as the dense view instead of allocating a second `row_count + 1`-sized buffer and copying. 3. Bench: have `qwp_egress_read_wide`'s SYMBOL inner loop call `dict.get(codes[r])` directly when iterating a column we know has no nulls, skipping the per-row validity check inside `resolve()`. This is a fair user-side optimization, not a bench-only hack — it matches the Java client's `getStrA` flyweight pattern. Adds `Reader::read_ns()` / `decode_ns()` / `reset_timing()` accumulators so the wide-table bench can split wall time into wire-arrival vs decoder-CPU vs user-iteration. With the optimizations applied, the profile shifts to ~315 ms read + ~155 ms decode + ~118 ms iter, with iter overlapping the next batch's wire arrival via the kernel TCP buffer. Total throughput is now within ~7% of the Java reference (1.22 GiB/s vs 1.3 GiB/s) on the same hardware. Lib tests stay at 734/734 across `--features almost-all-features` plus the four `--no-default-features` combos used in CI.
Three correctness fixes to Reader/Cursor lifecycle, each with a live- server regression test that exercises the bug pre-fix and bounds the behaviour post-fix. 1. Drop closes the WebSocket on a mid-stream cursor. Pre-fix, Cursor::drop only flipped reader.cursor_active=false. The transport stayed open with the abandoned query's RESULT_BATCH / RESULT_END frames still in flight, so the next execute() on the Reader silently multiplexed onto the dirty stream and the next next_batch() tripped the request_id check with ProtocolError. Post-fix, Drop calls a new WsTransport::close_in_place(&mut self) when cursor_active is still set. That sends the WS Close handshake so the server stops streaming and releases request-scoped state; any subsequent operation on the Reader fails cleanly at the transport layer with SocketError. Also fixed map_ws_error to classify Protocol(SendAfterClosing / ReceivedAfterClosing) as SocketError instead of ProtocolError, since these are transport-state errors not wire-format errors. Module doc rewritten to match the new contract. Tests: dropping_live_cursor_closes_connection (asserts SocketError on reuse) and cancel_then_drop_allows_reuse (counterpart: explicit cancel keeps the Reader usable end-to-end). 2. Cancel stops replenishing the server's credit window. Pre-fix, every batch read inside cancel()'s drain loop fired a send_credit_frame of the batch's wire size, refilling the server's per-request budget while we were throwing the bytes away. That defeated the very backpressure cancel was meant to use to hasten the post-cancel terminal. Post-fix, Cursor gains a `cancelling: bool` flag. cancel() flips it between writing the CANCEL frame and entering the drain loop, and next_batch() skips the per-batch CREDIT for the rest of the cursor's life. cancel() also emits a single 1-byte CREDIT wake nudge alongside CANCEL: QuestDB's egress server only re-enters streamResults from handleCredit on the credit-suspended path, and handleCancel just sets a flag. Without the nudge, a cancel against a credit-suspended server would deadlock; with it, streamResults re-enters, observes the cancel flag at the top of the loop (before the credit check), and aborts with STATUS_CANCELLED. Reader.credit_granted_total() and Cursor.credit_granted_total() accessors expose the connection-level CREDIT-bytes counter so tests can directly observe the bug. The regression test (cancel_does_not_replenish_credit_window) reads 3 batches, then cancels, and asserts that bytes granted during cancel <= 4 (i.e. just the wake nudge). With the suppression check removed, the same test reports 8063 bytes granted - exactly two batches of replenishment - and fails with a clear diagnostic. 3. QUERY_ERROR marks the cursor finished. Pre-fix, the ServerEvent::Error arm of next_batch returned Err and cleared cursor_active but never assigned self.terminal. Combined with cancel() converting Err(Cancelled) into Ok(()), the cursor ended up "finished from cancel's POV but unfinished from next_batch's POV". A follow-up next_batch() then fell through the short-circuit and blocked indefinitely on transport.read_frame() waiting for bytes the server would never send. The bug applied to every QUERY_ERROR (ParseError, InternalError, ...) not just Cancelled. Post-fix, Cursor gains a private `done: bool` flag set in all three terminal arms (End, ExecDone, Error). next_batch and cancel's early-return / drain-loop conditions all switch to using it. Public Terminal enum unchanged - error terminals are still surfaced via the Err return; done just keeps the state machine internally consistent. Test (cursor_short_circuits_after_query_error) covers both paths: bad SQL (next_batch returns Err, then must Ok(None)), and cancel (returns Ok, then next_batch must Ok(None)). assert_returns_within wraps each potentially-blocking call in a scoped thread + 3s poll-for-finished, so a regression fails with a clear diagnostic instead of hanging CI. PR #140 review comments (12 of 14 addressed in this commit): - Stale module / type docs across binds.rs, column.rs, decoder.rs, mod.rs, transport.rs - now reflect the fact that VARCHAR / BINARY / GEOHASH / DECIMAL128/256 / arrays are decoded, FLAG_ZSTD and Gorilla temporals are supported, and TLS / Reader / Cursor / BatchView are shipped. binds.rs Geohash precision_bits range corrected from (1..60) to (1..=60). - config.rs: error for compression={zstd,auto} without compression-zstd feature now reports the user-facing token (compression=auto) instead of the wire token (zstd,raw). - reader.rs: next_request_id wrap-skips 0 and negatives. Astronomically unlikely on a single connection but keeps request_id strictly positive. - decoder.rs: col_count is capped at 4096 at the varint read site, guarding every downstream Vec::with_capacity(col_count) against an OOM from a hostile or corrupted varint. - server_event.rs: decode_frame now rejects header.table_count != 1 for RESULT_BATCH and != 0 for every other kind, catching frame / msg-kind drift up front. - egress_live_server.rs: decimal comment at the bind_decimal128 test fixed (mantissa 1234567 at scale 4 is 123.4567, not 12.34567). zstd_compressed_multi_batch downgrades the compressed_batches > 0 hard-assert to an eprintln warning - the FLAG_ZSTD decode path is exercised independently by encoder unit tests, and a hard fail here would couple the test to QuestDB's per-batch compression heuristic. Two comments deliberately not actioned: .gitmodules branch=master is intentional given the JDK 25 CI tracking work, and Reference-mode schema validation is already done by the caller at decoder.rs:402-410 so an in-function check would be duplicate work. Both threads resolved on the PR with that reasoning. Verified locally with JDK 25 on the questdb submodule: - 369/369 lib unit tests pass (sync-reader-ws feature) - 79/79 live-server tests pass (live-server-tests feature) - clippy clean with --features almost-all-features --tests -- -D warnings Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…apper Cursor::Drop emits a CANCEL frame and then a Close frame on the same socket (egress/reader.rs:1855-1862 -> transport.rs:362,416-423). On Linux, if the peer has gone away between the two writes, the first write_all consumes sk_err and returns ECONNRESET; the second write_all hits the clean-sk_err / sk_shutdown path in tcp_sendmsg and raises SIGPIPE. On macOS the first send already SIGPIPEs. The failover replay path (re-issued QUERY_REQUEST followed by CREDIT frames on a freshly- opened-but-then-dead socket) has the same multi-write shape. Pure-Rust binaries are shielded by std's startup SIG_IGN, but the FFI cdylib loaded into a C/Python/etc. host inherits the host's SIGPIPE disposition - typically SIG_DFL, which kills the process. The C++ mock server hit this on macOS and was fixed in 7239e5d (QWP_MSG_NOSIGNAL + set_no_sigpipe); this commit mirrors that on the Rust client side. NoSigpipeTcp (egress/ws/nosigpipe.rs) wraps the connected TcpStream: - Linux/Android: every write routes through send(2) with MSG_NOSIGNAL. - macOS/iOS/*BSD: setsockopt(SO_NOSIGPIPE, 1) once at construction. - Windows/other: pass-through (no equivalent signal exists). The wrapper is plumbed in transport.rs::connect_to so both Stream::Plain and the rustls::StreamOwned<_, NoSigpipeTcp> arm route writes through it. On platforms with SO_NOSIGPIPE the option lives on the kernel socket, so TcpStream::try_clone inherits it without a second setsockopt. Verification: - cargo fmt --manifest-path questdb-rs/Cargo.toml - cargo clippy --manifest-path questdb-rs/Cargo.toml --tests - cargo clippy --manifest-path questdb-rs/Cargo.toml --tests --features almost-all-features: clean - cargo clippy --manifest-path questdb-rs-ffi/Cargo.toml --tests --features confstr-ffi: clean - cargo test --features almost-all-features --lib: 1559 passed - cargo test --features almost-all-features --test egress_failover: 59 passed Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Two coverage gaps in the line_reader FFI surface, bundled because both
came out of the same review pass and exercise the same mock harness.
(1) Of 27 line_reader_query_bind_* exports, only bind_varchar was
exercised from cpp_test. The 19 ffi_bind_method! instantiations
and the explicit binds had Rust-side wire-format tests but no
C-side ABI test - a wrong parameter order or sign-extension in a
single bind would silently corrupt the captured QUERY_REQUEST
bytes with no signal in CI.
New TEST_CASE("mock: every supported bind variant marshals through
the FFI ABI") in cpp_test/test_line_reader_mock.cpp drives 24 of
27 bind variants in one query (every Phase-1-bindable type),
captures the QUERY_REQUEST off the mock, and asserts each byte
of the bind payload against a hand-computed expected vector.
Sentinel values per bind so a wrong argument order, sign extension,
or off-by-one width on any single bind produces a localised byte
diff (verified by deliberately flipping one byte - "bind payload
mismatch at byte 64"). The three Phase-1-rejected paths
(bind_binary, bind_ipv4, bind_null_binary, bind_null with ipv4
kind) cannot produce wire bytes - their ABI shape is checked at
compile time via the wrapper inlines, and the rejection is
exercised by existing Rust unit tests in egress/binds.rs.
(2) Reader's stat getters take &self and are documented as safe to
call concurrently from a monitor thread while another drives a
cursor (reader.rs:140-150). Commit 7239e5d's mention of
"assert_send::<Reader>() / assert_sync::<Reader>()" was an
offhand review check, not committed code - a future Rc/RefCell
field would silently flip Reader to !Send/!Sync with no signal.
No test actually migrated Reader to a worker thread while
polling stats from main; the FFI's UnsafeCell<Reader> +
Arc<ReaderStats> design existed entirely in commentary.
- egress/reader.rs: const _ block pinning Reader / ReaderStats /
HostHealthTracker to Send + Sync. A regression breaks
compilation. Verified by adding PhantomData<Rc<()>> temporarily
- assertion fires with "the trait Send is not implemented for
Rc<()>" pointing at the bound.
- tests/egress_failover.rs:
reader_migrates_to_worker_thread_with_concurrent_stats_polling
runs three sequential queries on a worker thread while main
polls the cloned Arc<ReaderStats>. Asserts counter monotonicity
per poll and post-join final_bytes >= max_observed_bytes so a
broken store-Release on the done flag surfaces.
- cpp_test/test_line_reader_mock.cpp: mirror test driving 32
RESULT_BATCH frames via the FFI. Worker calls reader.execute()
and drains; main hammers bytes_received() / read_ns() /
decode_ns() / credit_granted_total() on the same wrapper.
Sound because the C-side line_reader struct keeps the
UnsafeCell<Reader> and the Arc<ReaderStats> in disjoint fields,
and the FFI getters use ptr::addr_of! to avoid an intermediate
&line_reader reborrow that would otherwise cover the cell.
Picks up TSan if/when wired into QUESTDB_SANITIZE.
Verification:
- cargo fmt + clippy --tests --features almost-all-features: clean
- cargo test --features almost-all-features --test egress_failover:
60 passed (was 59)
- build/test_line_reader_mock: 69 cases / 5167 assertions, was 67
- 3x rerun of the new C++ thread test: 2712 / 5412 / 7297 polls,
no flake
- Deliberate byte flip in the bind ABI test produced a localised
diff: "bind payload mismatch at byte 64"
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds a public Sender::qwp_ws_totals() snapshot mirroring the Java QwpWebSocketSender's getTotal*() counters (frames_sent, acks, reconnect_attempts, reconnects_succeeded, server_errors). Counters live on QwpWsPublicationStore so both background and manual progress modes see them; bumps happen in record_sent_event, apply_response (Ack / DurableOk / DurableAck / Reject), finish_reconnect_success, and a new store.record_reconnect_attempt() called from reconnect_with_policy + continue_reconnect. Also adds system_test/failover_clients/src/bin/qwp_sidecar.rs -- a line-protocol Rust port of com.questdb.e2e.QwpSidecarMain so the questdb-enterprise e2e harness can drive the Rust sender via the same stdin/stdout protocol it already uses for the Java sender. The binary's STATS verb reads qwp_ws_totals(). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds the client-side half of a cross-repo CI flow that runs the Rust
qwp_sidecar against a real QuestDB Enterprise primary. Two pieces:
- system_test/enterprise_e2e/: a self-contained pytest package
(sidecar adapter, fixtures, the failover test, pytest markers
c_client / c_client_rust). It registers questdb-enterprise's
lib.shared_fixtures plugin via PYTHONPATH so the Enterprise
harness primitives (server_factory, sidecar, scenario_dir,
obj_store) are reused without filesystem-coupling. Future C / C++
bindings drop in as sibling sub-binding markers (c_client_c,
c_client_cpp) without touching anything else.
- ci/run_tests_pipeline.yaml: a new TriggerEnterpriseCClientE2E
job that, on every non-fork PR build, POSTs to the Azure DevOps
REST API to queue the `build-and-test-e2e-c-client` pipeline in
the questdb-enterprise project with templateParameters
cClientCommit=$(Build.SourceVersion),
cClientPrNumber=$(System.PullRequest.PullRequestNumber), and
clientBranch=<source branch>. Fire-and-forget; the Enterprise
pipeline posts a GitHub status (`enterprise-e2e-c-client`) back
to the PR. Naming scheme keys every artefact on a per-repo
prefix (c_client, future py_client, etc.) so sibling client
repos don't collide.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The Microsoft-hosted queue runs consistently deeper than incus (33 vs 10 at last check). The dispatch job is a ~10-second curl+jq POST with no compute needs, so it wastes nothing on the self-hosted pool but gets picked up much faster. curl + jq are already on the hetzner image (the Enterprise ReportToOssPr stage uses both). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…itiving CI build for PR #140 fails on every linux job (linux/linux-stable/ linux-nightly, both `build/` and `build_CXX20/`) with `-Werror=maybe-uninitialized` raised against `std::variant`'s union storage during the move-construction triggered by `std::vector::push_back(qm::ActionXxx{})`. GCC 13's flow analysis can't prove which variant alternative is active inside the move-ctor and flags padding bytes of inactive alternatives (`ActionSendExecDone`, `ActionSendCacheReset`, …) as possibly uninitialized — a known false positive on `std::variant` move-ctor analysis. Other TEST_CASEs in this file use `Script s = { … }` (initializer-list ctor; alternatives constructed inline) and don't trip it; the new concurrent-stats test needed a loop and so used push_back. Switching to `emplace_back(qm::ActionXxx{})` forwards the rvalue straight to `qm::Action`'s converting variant constructor, constructing in-place in the vector slot — no variant move-ctor is invoked, so the union-storage analysis path is never reached. Also pre-`reserve` the vector so any future change can't reintroduce a relocation walk through the same move path. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The Enterprise pipeline registration lives in a separate Azure DevOps
project ('questdb-enterprise') from this one ('questdb'). Replace the
$(System.TeamProject) default in enterpriseProject with the literal
project name so the REST API call goes to the right place. Comment
also updated to spell out the cross-project Queue-builds permission
the Enterprise side needs to grant.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The c-questdb-client and questdb-enterprise pipelines live in different ADO projects (`questdb` vs `questdb-enterprise`), and System.AccessToken can't see cross-project pipelines APIs without project-scoped-auth being disabled on the source + cross-project Build Service permissions granted on the target. PAT auth side-steps both: a single secret pipeline variable (ENT_DISPATCH_PAT, created in the Enterprise ADO project with Build read-and-execute scope) authorises the lookup + queue calls directly. Fail fast with a clear message if the variable isn't set, so a missing secret produces an actionable error rather than a 401 from the REST call. Fork-PR skip logic is unchanged but the comment now says secret variables (not just System.AccessToken) are what's unavailable on forks. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Surface Disconnected / Retrying / Reset / GaveUp phases of mid-query failover via a single callback. Closes the visibility gap where on_failover_reset only fired after a successful reconnect — SLO dashboards now see the outage when it happens, per-retry telemetry is available, and "gave up" is observable without polling. Either on_failover_reset or on_failover_progress being installed opts the cursor in to replay-after-data-delivered. Wired through Rust core, FFI, C/C++ headers, and the system_test failover_client so the real-server CI lane exercises every phase. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Integrates the vi_egress egress/ingress refactor with the pipelined reader. Conflicts resolved in three files: - egress/reader.rs: merged the two divergent failover-reconnect changes. vi_egress added an `on_attempt: &mut dyn FnMut(u32)` per-attempt progress hook (feeding `on_failover_progress`); the pipelined branch split the function into a cancellable variant (`abort_tick` + `abort_check`, for worker shutdown/cancel). The merged `reconnect_with_failover_cancellable` carries both; the `reconnect_with_failover` wrapper and the sync `Cursor` caller pass `on_attempt`, while `pipelined_internals` passes a no-op. Kept the `FailoverEvent::failed_request_id` field/snapshot alongside the new `FailoverProgressEvent` phases, and adopted vi_egress's `has_replay_aware_callback` naming for `would_silently_duplicate` (now gated on on_failover_reset OR on_failover_progress). - egress/mod.rs: kept both the pipelined_reader exports and the expanded reader exports (FailoverPhase, FailoverProgressEvent). - ci/run_tests_pipeline.yaml: kept the "+ pipelined" fuzz-step displayName and vi_egress's new enterprise-e2e dispatch job. Verified: questdb-rs builds + clippy clean + tests pass (1586 lib, 65 failover, 49 doctests, 0 failed) under almost-all-features; questdb-rs-ffi builds clean under --all-features. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Pipelined (background-thread) QWP egress reader
Adds a pipelined egress reader to the
questdb-rscore: socket read + framedecode run on a dedicated OS worker thread (
questdb-egress-io), so while theuser thread processes batch N the worker is already reading + decoding batch
N+1. This naturally pipelines decode against per-row consumption.
"Pipelined" means decoupled via an OS thread — not Rust
async/.await.There is no executor and no polling; the public API is plain blocking method
calls. It's a direct port of the Java client's
QwpEgressIoThread+QwpQueryClientpair.API at a glance
PipelinedReader— owns the worker thread (from_conf/from_env).PipelinedQuery—prepare()+ typed binds +execute().PipelinedCursor— pulls owned events (take_event, blocking / try / timed),plus
cancel()andrequest_id().Event— tagged enum:Batch/End/ExecDone/FailoverReset(
#[non_exhaustive]).OwnedBatch— refcountedBytesslices, so a batch outlives the channel turnthat delivered it.
channel fills, then backpressures via TCP recv buffer / server flow control
(when
initial_credit > 0).Supporting changes in the sync reader (
egress/reader.rs)reconnect_with_failover_cancellablewithabort_tick+abort_check). The worker pollsshutdown/cancel_slotduring the failover backoff so
PipelinedReader::close/PipelinedCursor::cancel/Dropabort in bounded time (oneREAD_POLL_TICK)instead of blocking for the whole
failover_max_attempts × failover_backoff_max_msbudget — or forever withfailover_max_duration_ms=0.The sync path passes
Duration::MAX+ a no-op check, so it is unaffected.FailoverEvent::failed_request_id— the request_id the cursor held on theconnection that just failed, so callers can correlate pre-/post-failover frames
by
(failed, new)rid pair.pipelined_internals—pub(crate)shim exposing only the cancellablereconnect + terminate paths to the pipelined module.
Scope
sync-reader-wsfeature. No FFI / C /C++ surface in this PR — the public C API for the pipelined reader is
deliberately out of scope here.
egress/pipelined_reader.rs,tests/egress_pipelined.rs,examples/qwp_egress_read_pipelined.rs; plusegress/wire/varint.rsand smalladditions to
schema.rs/symbol_dict.rs/transport.rs/lib.rs.ci/run_tests_pipeline.yamlruns--test egress_pipelinedunderlive-server-tests.Verification
questdb-rs: builds +clippyclean + tests pass underalmost-all-features(1586 lib + 65 failover + 49 doctests, 0 failed).
questdb-rs-ffi: builds clean under--all-features.egress_pipelinedintegration cases are live-broker gated (require arunning QuestDB) and were not exercised locally.