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Grammar: Adds support for ALTER VIEW statement for Postgres dialect #2096

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merged 4 commits into from Dec 12, 2021

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derickl
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@derickl derickl commented Dec 11, 2021

Brief summary of the change made

Adds support for parsing ALTER VIEW statements for the Postgres dialect
Closes #2094

Are there any other side effects of this change that we should be aware of?

None

Pull Request checklist

  • Please confirm you have completed any of the necessary steps below.

  • Included test cases to demonstrate any code changes, which may be one or more of the following:

    • .yml rule test cases in test/fixtures/rules/std_rule_cases.
    • .sql/.yml parser test cases in test/fixtures/dialects (note YML files can be auto generated with python test/generate_parse_fixture_yml.py or by running tox locally).
    • Full autofix test cases in test/fixtures/linter/autofix.
    • Other.
  • Added appropriate documentation for the change.

  • Created GitHub issues for any relevant followup/future enhancements if appropriate.

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codecov bot commented Dec 11, 2021

Codecov Report

Merging #2096 (d6c867c) into main (7aecf67) will not change coverage.
The diff coverage is 100.00%.

Impacted file tree graph

@@            Coverage Diff            @@
##              main     #2096   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          148       148           
  Lines        10603     10608    +5     
=========================================
+ Hits         10603     10608    +5     
Impacted Files Coverage Δ
src/sqlfluff/dialects/dialect_postgres.py 100.00% <100.00%> (ø)

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@jpy-git jpy-git mentioned this pull request Dec 11, 2021
2 tasks
src/sqlfluff/dialects/dialect_postgres.py Outdated Show resolved Hide resolved
Comment on lines +1672 to +1681
Sequence(
"SET",
"DEFAULT",
OneOf(
Ref("LiteralGrammar"),
Ref("FunctionSegment"),
Ref("BareFunctionSegment"),
Ref("ExpressionSegment"),
),
),
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You're correct here. I noticed that the existing AlterTableActionSegment only allows expression segments when it should also account for the segments you have here. If you're interested would you be able to create a separate PR to match that line to the SET DEFAULT grammar you have here and add the corresponding unit tests? 😄

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Raised here: #2101

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@derickl Fantastic work, looks perfect to me! 🚀

P.S. see my note from the review for a quick future PR suggestion

@jpy-git jpy-git merged commit f99d9b3 into sqlfluff:main Dec 12, 2021
@derickl derickl deleted the 2094-postgres-alter-view branch December 12, 2021 18:03
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Postgres: Add support for ALTER VIEW statement
2 participants