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[Docs] clarify connection close behavior of context #1606

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merged 2 commits into from
Jul 24, 2024

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chriskirkland
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@chriskirkland chriskirkland commented Jul 9, 2024

Description

Updates the README to make it clear that go-sql-driver/mysql closes the current connection if the context.Context provided to ExecContext, SelectContext, etc. is cancelled or times out prior to the query returning.

As is, that behavior is not clearly documented.

Checklist

  • Code compiles correctly
  • Created tests which fail without the change (if possible)
  • All tests passing
  • Extended the README / documentation, if necessary
  • Added myself / the copyright holder to the AUTHORS file

Summary by CodeRabbit

Summary by CodeRabbit

  • New Features
    • Introduced support for context cancellation in database operations, enhancing connection management.
  • Documentation
    • Updated README to clarify the effects of context cancellation, improving guidance on using context-aware methods.

Updates the README to make it clear that `go-sql-driver/mysql` closes the current connection of the `context.Context` provided to `ExecContext`, `SelectContext`, etc. is cancelled or times out prior to the query returning.

As is, that behavior is not clearly documented.
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coderabbitai bot commented Jul 9, 2024

Walkthrough

The update enhances database/sql operations by implementing support for context cancellation. This ensures that connections are closed if their context is canceled or times out before the operation completes. Additionally, it highlights necessary changes to import paths for LOAD DATA LOCAL INFILE, improving functionality in context-aware scenarios.

Changes

File Change Summary
README.md Updated to clarify support for context cancellation in database/sql operations and import path changes for LOAD DATA LOCAL INFILE.

Poem

A query races through the sql,
With context watchful, it’ll never fail,
Timeout whispers, “Close the gate!”
Import paths adjust, don’t hesitate.
In code's vast field we softly tread,
With every change, we move ahead. 🌟🐰


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Actionable comments posted: 0

Outside diff range and nitpick comments (1)
README.md (1)

526-526: Add a comma after 'Therefore'.

A comma is needed after the conjunctive/linking adverb ‘Therefore’ to improve readability.

- Therefore you must change the import path (no `_`):
+ Therefore, you must change the import path (no `_`):
Tools
LanguageTool

[uncategorized] ~526-~526: A comma may be missing after the conjunctive/linking adverb ‘Therefore’.
Context: ... you need direct access to the package. Therefore you must change the import path (no _...

(SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA)

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 3484db1 and e330067.

Files selected for processing (1)
  • README.md (1 hunks)
Additional context used
LanguageTool
README.md

[uncategorized] ~526-~526: A comma may be missing after the conjunctive/linking adverb ‘Therefore’.
Context: ... you need direct access to the package. Therefore you must change the import path (no _...

(SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA)

Additional comments not posted (1)
README.md (1)

522-523: Clear and accurate documentation update.

The documentation now correctly states that SelectContext, ExecContext, etc., will close the connection if the provided context is cancelled or times out before the result is received.

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coveralls commented Jul 9, 2024

Coverage Status

coverage: 82.403% (-0.04%) from 82.446%
when pulling 92ef6f7 on chriskirkland:patch-1
into 3484db1 on go-sql-driver:master.

README.md Outdated Show resolved Hide resolved
Co-authored-by: Inada Naoki <songofacandy@gmail.com>
@chriskirkland chriskirkland requested a review from methane July 23, 2024 14:04
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Actionable comments posted: 0

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between e330067 and 92ef6f7.

Files selected for processing (1)
  • README.md (1 hunks)
Additional context used
Learnings (1)
Common learnings
Learnt from: shogo82148
PR: go-sql-driver/mysql#1576
File: CHANGELOG.md:1-6
Timestamp: 2024-03-26T14:24:09.629Z
Learning: PRs #1562 and #1570 in the go-sql-driver/mysql repository collectively address the same underlying issue related to fixing a race condition when a context is canceled, as documented in the CHANGELOG.md for version 1.8.1.
Additional comments not posted (1)
README.md (1)

522-523: Approved: Important clarification on context cancellation behavior.

The added note clearly explains that the QueryContext, ExecContext, etc., variants provided by database/sql will cause the connection to be closed if the provided context is canceled or times out before the result is received by the driver. This is an important clarification for users to understand the implications of using context-aware methods.

@methane methane enabled auto-merge (squash) July 24, 2024 02:45
@methane methane merged commit 44553d6 into go-sql-driver:master Jul 24, 2024
37 of 38 checks passed
methane pushed a commit to methane/mysql that referenced this pull request Nov 13, 2024
Updates the README to make it clear that `go-sql-driver/mysql` closes
the current connection if the `context.Context` provided to
`ExecContext`, `SelectContext`, etc. is cancelled or times out prior to
the query returning.
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3 participants