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[fix](parquet) fix dict page offset zero incompatible behaviour #41506
[fix](parquet) fix dict page offset zero incompatible behaviour #41506
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Thank you for your contribution to Apache Doris. Since 2024-03-18, the Document has been moved to doris-website. |
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PR Reviewer Guide 🔍(Review updated until commit 215f451)Here are some key observations to aid the review process:
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Persistent review updated to latest commit 215f451 |
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LGTM
PR approved by at least one committer and no changes requested. |
PR approved by anyone and no changes requested. |
…he#41506) ## Proposed changes Reason: https://issues.apache.org/jira/browse/ARROW-5322 Java readers(parquet-mr) handles "dictionaryPageOffset = 0" to determine if dictionary page exists where as the C readers uses "has_dictionaryPageOffset" (_isset bit in thrift message) to determine the same resulting in incompatible behaviours. Therefore, we should consider that dicttionary page exists when both `__isset.dictionary_page_offset` is true and `dictionary_page_offset` is greater than 0.
…he#41506) ## Proposed changes Reason: https://issues.apache.org/jira/browse/ARROW-5322 Java readers(parquet-mr) handles "dictionaryPageOffset = 0" to determine if dictionary page exists where as the C readers uses "has_dictionaryPageOffset" (_isset bit in thrift message) to determine the same resulting in incompatible behaviours. Therefore, we should consider that dicttionary page exists when both `__isset.dictionary_page_offset` is true and `dictionary_page_offset` is greater than 0.
…he#41506) ## Proposed changes Reason: https://issues.apache.org/jira/browse/ARROW-5322 Java readers(parquet-mr) handles "dictionaryPageOffset = 0" to determine if dictionary page exists where as the C readers uses "has_dictionaryPageOffset" (_isset bit in thrift message) to determine the same resulting in incompatible behaviours. Therefore, we should consider that dicttionary page exists when both `__isset.dictionary_page_offset` is true and `dictionary_page_offset` is greater than 0.
…he#41506) ## Proposed changes Reason: https://issues.apache.org/jira/browse/ARROW-5322 Java readers(parquet-mr) handles "dictionaryPageOffset = 0" to determine if dictionary page exists where as the C readers uses "has_dictionaryPageOffset" (_isset bit in thrift message) to determine the same resulting in incompatible behaviours. Therefore, we should consider that dicttionary page exists when both `__isset.dictionary_page_offset` is true and `dictionary_page_offset` is greater than 0.
…he#41506) ## Proposed changes Reason: https://issues.apache.org/jira/browse/ARROW-5322 Java readers(parquet-mr) handles "dictionaryPageOffset = 0" to determine if dictionary page exists where as the C readers uses "has_dictionaryPageOffset" (_isset bit in thrift message) to determine the same resulting in incompatible behaviours. Therefore, we should consider that dicttionary page exists when both `__isset.dictionary_page_offset` is true and `dictionary_page_offset` is greater than 0.
Proposed changes
Reason: https://issues.apache.org/jira/browse/ARROW-5322
Java readers(parquet-mr) handles "dictionaryPageOffset = 0" to determine if dictionary page exists where as the C readers uses "has_dictionaryPageOffset" (_isset bit in thrift message) to determine the same resulting in incompatible behaviours.
Therefore, we should consider that dicttionary page exists when both
__isset.dictionary_page_offset
is true anddictionary_page_offset
is greater than 0.