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PARQUET-2139: Clarify ColumnChunk::file_offset is not used #439

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PARQUET-2139: Clarify ColumnChunk::file_offset is not used #439

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7 changes: 6 additions & 1 deletion src/main/thrift/parquet.thrift
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Expand Up @@ -867,7 +867,12 @@ struct ColumnChunk {
**/
1: optional string file_path

/** Byte offset in file_path to the ColumnMetaData **/
/** Byte offset in file_path to the ColumnMetaData.
Note: most writers include the ColumnMetadata inline (via meta_data).
While the presence of this field implies that ColumnMetaData can be
stored separately in the file, this is is not supported by many implementations
which assume meta_data is set.
**/
2: required i64 file_offset

/** Column metadata for this chunk. This is the same content as what is at
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