emkornfield commented on code in PR #39153:
URL: https://github.com/apache/arrow/pull/39153#discussion_r1423497334
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cpp/src/parquet/column_reader.h:
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@@ -368,6 +368,11 @@ class PARQUET_EXPORT RecordReader {
virtual void DebugPrintState() = 0;
+ /// \brief Returns the dictionary owned by the current decoder. Throws an
+ /// exception if the current decoder is not for dictionary encoding.
Review Comment:
Maybe add a comment that in general the only safe time to call this is
before any values have been read?
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