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Check Postgres relation name lengths and throw error when over 63 #2727

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merged 4 commits into from
Aug 28, 2020
Merged

Check Postgres relation name lengths and throw error when over 63 #2727

merged 4 commits into from
Aug 28, 2020

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gshank
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@gshank gshank commented Aug 26, 2020

resolves #2197

Description

Postgres table names (for both models and temporary tables) that are longer than 63 characters are silently truncated causing various problems in dbt processing.

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  • I have signed the CLA
  • I have run this code in development and it appears to resolve the stated issue
  • This PR includes tests, or tests are not required/relevant for this PR
  • I have updated the CHANGELOG.md and added information about my change to the "dbt next" section.

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@gshank gshank requested a review from beckjake August 26, 2020 15:14
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@cla-bot cla-bot bot added the cla:yes label Aug 26, 2020
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beckjake
beckjake suggested changes Aug 26, 2020
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This looks good! I've added some feedback inline on particular things.

For the integration tests, this is my fault for not being clear, but we should try to not use the run a sql file and then test off it method if we can avoid it. Instead, let's use seed csvs and run dbt seed as part of the test suite. Check out the 052_column_quoting test as a good example of this pattern.

In the very long term, we'd like to move more tests into a common integration suite for all adapters (the dbt-adapter-tests suite), and .sql files are not very portable since every database can have its own silly syntax.

plugins/postgres/dbt/adapters/postgres/__init__.py Outdated Show resolved Hide resolved
plugins/postgres/dbt/adapters/postgres/relation.py Outdated Show resolved Hide resolved
plugins/redshift/dbt/adapters/redshift/__init__.py Outdated Show resolved Hide resolved
plugins/redshift/dbt/adapters/redshift/relation.py Outdated Show resolved Hide resolved
@gshank gshank requested a review from jtcohen6 August 26, 2020 18:22
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jtcohen6 reviewed Aug 27, 2020
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This is looking great! I have one small comment about the error message. It looks like there are a few flake8 (code style) errors as well.

plugins/postgres/dbt/adapters/postgres/relation.py Outdated Show resolved Hide resolved
jtcohen6
jtcohen6 approved these changes Aug 27, 2020
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Nice work! I'll leave final code review to @beckjake

beckjake
beckjake approved these changes Aug 27, 2020
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Looks great! I have one tiny request on the changelog. Once that's done and tests pass, this is good to merge.

CHANGELOG.md
@@ -3,6 +3,7 @@

### Under the hood
- Added 3 more adapter methods that the new dbt-adapter-test suite can use for testing. ([#2492](https://github.com/fishtown-analytics/dbt/issues/2492), [#2721](https://github.com/fishtown-analytics/dbt/pull/2721))
- Check for Postgres relation names longer than 63 and throw exception. ([#2197](https://github.com/fishtown-analytics/dbt/issues/2197))
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You should also add a link to this PR!

@gshank gshank merged commit 2cc2d97 into dev/marian-anderson Aug 28, 2020
@beckjake beckjake mentioned this pull request Sep 2, 2020
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@kwigley kwigley deleted the fix/2197-long-table-names branch February 5, 2021 17:20
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@jtcohen6 jtcohen6 jtcohen6 approved these changes

@beckjake beckjake beckjake approved these changes

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Long table names can be truncated on Postgres (at least) silently
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@gshank @beckjake @jtcohen6