{"action":"opened","number":14278,"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/14278","id":78096555,"html_url":"https://github.com/apache/spark/pull/14278","diff_url":"https://github.com/apache/spark/pull/14278.diff","patch_url":"https://github.com/apache/spark/pull/14278.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/14278","number":14278,"state":"open","locked":false,"title":"[SPARK-16632][SQL] Use Spark requested schema to guide vectorized Parquet reader initialization","user":{"login":"liancheng","id":230655,"avatar_url":"https://avatars.githubusercontent.com/u/230655?v=3","gravatar_id":"","url":"https://api.github.com/users/liancheng","html_url":"https://github.com/liancheng","followers_url":"https://api.github.com/users/liancheng/followers","following_url":"https://api.github.com/users/liancheng/following{/other_user}","gists_url":"https://api.github.com/users/liancheng/gists{/gist_id}","starred_url":"https://api.github.com/users/liancheng/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/liancheng/subscriptions","organizations_url":"https://api.github.com/users/liancheng/orgs","repos_url":"https://api.github.com/users/liancheng/repos","events_url":"https://api.github.com/users/liancheng/events{/privacy}","received_events_url":"https://api.github.com/users/liancheng/received_events","type":"User","site_admin":false},"body":"## What changes were proposed in this pull request?\r\n\r\nIn `SpecificParquetRecordReaderBase`, which is used by the vectorized Parquet reader, we convert the Parquet requested schema into a Spark schema to guide column reader initialization. However, the Parquet requested schema is tailored from the schema of the physical file being scanned, and may have inaccurate type information due to bugs of other systems (e.g. HIVE-14294).\r\n\r\nOn the other hand, we already set the real Spark requested schema into Hadoop configuration in [`ParquetFileFormat`][1]. This PR simply reads out this schema to replace the converted one.\r\n\r\n## How was this patch tested?\r\n\r\nNew test case added in `ParquetQuerySuite`.\r\n\r\n[1]: 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