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When performing a Broker Load with wildcards (e.g., /*), if the directory contains
0-byte metadata files like _SUCCESS, the FE would incorrectly use the format/compression
of these metadata files (usually PLAIN) to overwrite the shared parameters for the
entire file group. This caused the BE to read compressed data files (like LZO) as
plain text, leading to import failures.
This PR fixes the issue by:
Filtering out _SUCCESS files in BrokerLoadPendingTask to avoid processing
them as data.
Setting format_type and compress_type in each TFileRangeDesc instead of
the shared TFileScanRangeParams in FE (both legacy and Nereids paths).
Prioritizing per-file format_type in BE's CsvReader to ensure the correct
reader is initialized for each file.
Adding unit tests to verify _SUCCESS filtering
Release note
None
Check List (For Author)
Test
Regression test
Unit Test
Manual test (add detailed scripts or steps below)
No need to test or manual test. Explain why:
This is a refactor/code format and no logic has been changed.
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What problem does this PR solve?
Problem Summary:
When performing a Broker Load with wildcards (e.g.,
/*), if the directory contains0-byte metadata files like
_SUCCESS, the FE would incorrectly use the format/compressionof these metadata files (usually PLAIN) to overwrite the shared parameters for the
entire file group. This caused the BE to read compressed data files (like LZO) as
plain text, leading to import failures.
This PR fixes the issue by:
_SUCCESSfiles inBrokerLoadPendingTaskto avoid processingthem as data.
format_typeandcompress_typein eachTFileRangeDescinstead ofthe shared
TFileScanRangeParamsin FE (both legacy and Nereids paths).format_typein BE'sCsvReaderto ensure the correctreader is initialized for each file.
_SUCCESSfilteringRelease note
None
Check List (For Author)
Test
Behavior changed:
Does this need documentation?
Check List (For Reviewer who merge this PR)