taosdata / taosdata/TDengine

Query Capabilities Improvement

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#29,862 1 comment 0 reactions 0 assignees View on GitHub

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community
Dominant language
C
Stars
25.1k
Forks
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Avg merge
4d 59m
Merged PRs (30d)
7

Description

  • significantly relax the restrictions on join queries
  • support all MySQL mathematical functions
  • support integral/integral average/continuous variance functions
  • optimize the Csum function; support the Count(distinct) syntax
  • enhance the event window function; improve the performance of tag filtering; improve the performance of Interp queries

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by mapping the query-engine entry points for joins, MySQL mathematical functions, integral and variance functions, Csum, Count(distinct), event windows, tag filtering, and Interp queries. Done means the listed query capabilities are supported and the requested performance improvements are validated, but the issue names no files or tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
c, sql
Domain
databases
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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