Files
greptimedb/tests
shuiyisong 5fe9bdc814 feat(prometheus): store Remote Write v1 and v2 exemplars (#9922)
* feat(prometheus): persist Remote Write exemplars

Prometheus Remote Write v1 and v2 now persist valid exemplars in the source schema's metrics_exemplars table. A shared row contract keeps inherited series labels separate from exemplar labels, creates or validates an ordinary sparse append table, and preserves compatible pre-created timestamp precision.

Malformed observations are dropped and counted without discarding valid samples or sibling exemplars. Permissions and admission precede writes, and v2 written-count headers use confirmed storage progress. Includes decoder, HTTP orchestration and physical-table routing coverage. The JSON2 row-schema helper becomes fallible; its three existing trace callers propagate that error in this layer.

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* feat(exemplar): persist source metric identities

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* fix(prometheus): bound exemplar write memory

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* fix(prometheus): correct batching with exemplars

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* fix(exemplar): accept mixed-case sparse encoding

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* perf(exemplar): reduce write preparation overhead

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* perf(prom): reuse exemplar source targets

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* fix: clippy

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* fix(prometheus): defer exemplar series expansion

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

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Signed-off-by: shuiyisong <xixing.sys@gmail.com>
2026-11-03 11:43:33 +00:00
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Sqlness Test

Sqlness manual

Case file

Sqlness has two types of file:

  • .sql: test input, SQL only
  • .result: expected test output, SQL and its results

.result is the output (execution result) file. If you see .result files is changed, it means this test gets a different result and indicates it fails. You should check change logs to solve the problem.

You only need to write test SQL in .sql file, and run the test.

Case organization

The root dir of input cases is tests/cases. It contains several subdirectories stand for different test modes. E.g., standalone/ contains all the tests to run under greptimedb standalone start mode.

Under the first level of subdirectory (e.g. the cases/standalone), you can organize your cases as you like. Sqlness walks through every file recursively and runs them.

Kafka WAL

Sqlness supports Kafka WAL. You can either provide a Kafka cluster or let sqlness to start one for you.

To run test with kafka, you need to pass the option -w kafka. If no other options are provided, sqlness will use conf/kafka-cluster.yml to start a Kafka cluster. This requires docker and docker-compose commands in your environment.

Otherwise, you can additionally pass the your existing kafka environment to sqlness with -k option. E.g.:

cargo sqlness bare -w kafka -k localhost:9092

In this case, sqlness will not start its own kafka cluster and the one you provided instead.

Run the test

Unlike other tests, this harness is in a binary target form. You can run it with:

cargo sqlness bare

It automatically finishes the following procedures: compile GreptimeDB, start it, grab tests and feed it to the server, then collect and compare the results. You only need to check if the .result files are changed. If not, congratulations, the test is passed 🥳!