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ddl, expression: Disallow add stored generated columns through ALTER TABLE #10758

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merged 3 commits into from
Jun 13, 2019
Merged

ddl, expression: Disallow add stored generated columns through ALTER TABLE #10758

merged 3 commits into from
Jun 13, 2019

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tangenta
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@tangenta tangenta commented Jun 11, 2019 •
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What problem does this PR solve?

A temporary solution for issue 9372.

According to current TiDB document, adding stored generated columns are not supported:

You cannot add the generated column in the storage type of STORED through ALTER TABLE.

So, an error should be returned for such statements.

What is changed and how it works?

  • A check in AddColumn()
  • Other redability improvements

Check the properties of the new column, if it is both Generated and Stored, return an errUnsupportedOnGeneratedColumn error.

Check List

Tests

  • Unit test

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codecov bot commented Jun 11, 2019 •
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Codecov Report

Merging #10758 into master will decrease coverage by 0.104%.
The diff coverage is 100%.

@@               Coverage Diff                @@
##             master     #10758        +/-   ##
================================================
- Coverage   80.3695%   80.2655%   -0.1041%     
================================================
  Files           416        416                
  Lines         88913      88419       -494     
================================================
- Hits          71459      70970       -489     
- Misses        12224      12241        +17     
+ Partials       5230       5208        -22

@tangenta tangenta requested a review from bb7133 June 11, 2019 03:47
crazycs520
crazycs520 reviewed Jun 12, 2019
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@tangenta tangenta force-pushed the generated-col-limit branch 2 times, most recently from 8052216 to b612cc5 Compare June 12, 2019 15:37
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@tangenta tangenta force-pushed the generated-col-limit branch 2 times, most recently from e332bf6 to c24bcb8 Compare June 13, 2019 02:13
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Rest LGTM

bb7133
bb7133 reviewed Jun 13, 2019
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LGTM

@zimulala zimulala added component/DDL-need-LGT3 status/LGT2 Indicates that a PR has LGTM 2. labels Jun 13, 2019
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LGTM

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winkyao commented Jun 13, 2019

/run-all-tests

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/run-all-tests

@tangenta tangenta merged commit c59a108 into pingcap:master Jun 13, 2019
tangenta added a commit to tangenta/tidb that referenced this pull request Jun 14, 2019
@tangenta
ddl, expression: Disallow add stored generated columns through ALTER …
f956967 
…TABLE (pingcap#10758)
@tangenta tangenta mentioned this pull request Jun 14, 2019
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@tangenta tangenta deleted the generated-col-limit branch June 14, 2019 02:34
@crazycs520 crazycs520 mentioned this pull request Jun 14, 2019
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jackysp pushed a commit that referenced this pull request Jun 17, 2019
@tangenta @jackysp
ddl, expression: Disallow add stored generated columns through ALTER …
23d8d2b 
…TABLE (#10758) (#10808)
@Deardrops Deardrops mentioned this pull request Feb 20, 2020
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@you06 you06 added the sig/sql-infra SIG: SQL Infra label Mar 4, 2020
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