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Posted to github@datafusion.apache.org by "neilconway (via GitHub)" <gi...@apache.org> on 2026/05/06 16:14:42 UTC
[I] `overlay` behavior inconsistent with Postgres [datafusion]
neilconway opened a new issue, #22045:
URL: https://github.com/apache/datafusion/issues/22045
### Describe the bug
```
SELECT overlay('abc' placing 'X' from 4 for 1);
-- DF returns: 'X'
-- Postgres returns: 'abcX'
```
```
SELECT overlay('abc' placing 'X' from 0 for 1);
-- DF returns: 'Xabc'
-- Postgres produces "ERROR: negative substring length not allowed"
```
### To Reproduce
_No response_
### Expected behavior
_No response_
### Additional context
_No response_
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Re: [I] `overlay` behavior inconsistent with Postgres / SQL spec [datafusion]
Posted by "Dandandan (via GitHub)" <gi...@apache.org>.
Dandandan closed issue #22045: `overlay` behavior inconsistent with Postgres / SQL spec
URL: https://github.com/apache/datafusion/issues/22045
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Re: [I] `overlay` behavior inconsistent with Postgres [datafusion]
Posted by "neilconway (via GitHub)" <gi...@apache.org>.
neilconway commented on issue #22045:
URL: https://github.com/apache/datafusion/issues/22045#issuecomment-4389983845
take
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