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Antalya 26.3: normalizing format check using lower case#1803

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Antalya 26.3: normalizing format check using lower case#1803
zvonand wants to merge 2 commits into
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@zvonand zvonand commented May 15, 2026

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Cherry-picked from ClickHouse#102825.


Documentation entry for user-facing changes

  • Documentation is written (mandatory for new features)

It looks like we were not able to use the parquet metadata cache because the parquet format string gets passed many different ways and we were only looking for "Parquet". For example "PARQUET" from tools like Spark, "Parquet" internally in our code base, and "parquet" if you are following the iceberg spec.

In the future, it would be good to normalize this format string in one place, because we are dealing with this same issue in a few different places in the code.

grantholly-clickhouse and others added 2 commits May 15, 2026 21:31
…solution in next commit)

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Original cherry-pick message follows:

Merge pull request ClickHouse#102825 from grantholly-clickhouse/fix_iceberg_parquet_lru_cache

normalizing format check using lower case

# Conflicts:
#	src/Storages/ObjectStorage/StorageObjectStorageSource.cpp
@zvonand zvonand added releasy Created/managed by RelEasy ai-resolved Port conflict auto-resolved by Claude labels May 15, 2026
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