Gang Wu created PARQUET-2253:
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Summary: Postpone dictionary encoding decision for starting null
pages.
Key: PARQUET-2253
URL: https://issues.apache.org/jira/browse/PARQUET-2253
Project: Parquet
Issue Type: Improvement
Components: parquet-mr
Reporter: Gang Wu
Assignee: Gang Wu
Discussion from the dev mailing list: [Fallback Encoding for Very Sparse or
Sorted Datasets-Apache Mail
Archives|https://lists.apache.org/thread/jkkxhknsxw8cdv8fxf1bstqdn5fzw2pl]
If beginning values are all nulls, the dictionary encoding is disabled when
first data page is created. This loses the advantage of dictionary encoding if
following values are good fit.
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