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Posted to github@datafusion.apache.org by "comphead (via GitHub)" <gi...@apache.org> on 2026/02/13 18:07:51 UTC
[I] Default values doesn't work with `native_datafusion` [datafusion-comet]
comphead opened a new issue, #3515:
URL: https://github.com/apache/datafusion-comet/issues/3515
### Describe the bug
During DF52 migration #3046 the test
`select column with default value` stopped to work. The default values are not applied
```
== Results ==
!== Correct Answer - 1 == == Spark Answer - 1 ==
struct<col2:boolean> struct<col2:boolean>
![true] [null] (QueryTest.scala:244)
```
The reason DF expects default values to be sent before `Column` expressions to replace respective value by column name, however currently Comet sends default values after `Column`
### Steps to reproduce
```
make core && RUST_BACKTRACE=1 COMET_PARQUET_SCAN_IMPL=native_datafusion ./mvnw test -Dsuites="org.apache.comet.CometFuzzTestSuite select column with default value"
```
### Expected behavior
_No response_
### Additional context
_No response_
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Re: [I] Default values doesn't work with `native_datafusion` [datafusion-comet]
Posted by "comphead (via GitHub)" <gi...@apache.org>.
comphead commented on issue #3515:
URL: https://github.com/apache/datafusion-comet/issues/3515#issuecomment-3898670258
failing tests
```
test("INSERT rows, ALTER TABLE ADD COLUMNS with DEFAULTs, then SELECT them")
``` can also be related
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Re: [I] Default values doesn't work with `native_datafusion` [datafusion-comet]
Posted by "comphead (via GitHub)" <gi...@apache.org>.
comphead commented on issue #3515:
URL: https://github.com/apache/datafusion-comet/issues/3515#issuecomment-3898926351
it is related to df52, @andygrove recommended to ignore it for now and address in post migration.
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Re: [I] Default values doesn't work with `native_datafusion` [datafusion-comet]
Posted by "mbutrovich (via GitHub)" <gi...@apache.org>.
mbutrovich commented on issue #3515:
URL: https://github.com/apache/datafusion-comet/issues/3515#issuecomment-3898790882
Are you saying they don't work in `main` or are you tracking `df52` branch issues? As far as I know, `main` is still working as expected after #1756. If this is new behavior in the `df52` branch, then we should clarify.
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