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[DOC] Bring list of unsupported SQL constructs up-to-date#6636

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mihaibudiu merged 1 commit into
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Jul 15, 2026
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[DOC] Bring list of unsupported SQL constructs up-to-date#6636
mihaibudiu merged 1 commit into
feldera:mainfrom
mihaibudiu:unimplemented

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Checklist

  • Documentation updated

@mihaibudiu
mihaibudiu requested a review from anandbraman July 15, 2026 01:30
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mihaibudiu enabled auto-merge July 15, 2026 01:30
LEFT JOIN UNNEST(s.mentions) AS m(mention_id) ON TRUE;
```

## Map functions

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These are niche Databricks functions, they are not really "standard" SQL.

@anandbraman anandbraman Jul 15, 2026

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I'd advocate leaving these since our users come from Databricks quite often

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Docs cleanup lines up with reality:

  • New "Aggregate functions" section enumerates the unsupported set.
  • Window functions section broadened from NTILE/NTH_VALUE to include PERCENT_RANK, CUME_DIST, VAR_POP, VAR_SAMP.
  • Stale "Map functions" table dropped (those are supported now).
  • Old blanket "no timezone" claim narrowed to the accurate "TIME WITH TIME ZONE not supported" — matches current TIMESTAMP behaviour.

One typo inline. Otherwise LGTM.

Comment thread docs.feldera.com/docs/sql/unsupported-operations.md Outdated
LEFT JOIN UNNEST(s.mentions) AS m(mention_id) ON TRUE;
```

## Map functions

@anandbraman anandbraman Jul 15, 2026

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I'd advocate leaving these since our users come from Databricks quite often

@mihaibudiu

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I can leave the MAP functions, but there are perhaps a few hundred more Databricks functions that we don't support. Felderize lists many more of them.

Signed-off-by: Mihai Budiu <mbudiu@feldera.com>
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Added back MAP functions.

@mihaibudiu
mihaibudiu requested a review from anandbraman July 15, 2026 17:43
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mihaibudiu added this pull request to the merge queue Jul 15, 2026
Merged via the queue into feldera:main with commit abad2e8 Jul 15, 2026
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@mihaibudiu
mihaibudiu deleted the unimplemented branch July 15, 2026 20:17
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3 participants