kumarUjjawal opened a new pull request, #22950:
URL: https://github.com/apache/datafusion/pull/22950
## Which issue does this PR close?
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- Closes #22935.
## Rationale for this change
Anonymous file reads can read the same path with different explicit schemas
in the same session. The shared file statistics cache was keyed by table/path
metadata, but did not validate that cached statistics matched the schema used
to compute them.
This could reuse narrower cached statistics for a later wider schema read
and panic during statistics projection.
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## What changes are included in this PR?
This PR routes anonymous listing table statistics through a per-table cache
instead of the shared session cache.
Named tables still use the shared session cache, since their table reference
gives the cache a stable identity.
It also adds a regression test that first warms statistics with the physical
schema, then reads the same Parquet file with a wider explicit schema.
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## Are these changes tested?
Yes
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## Are there any user-facing changes?
No API Change
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