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Posted to commits@gluten.apache.org by "dcoliversun (via GitHub)" <gi...@apache.org> on 2024/04/01 09:47:43 UTC

Re: [I] [VL]Support cast date as varchar/timestamp in velox [incubator-gluten]

dcoliversun commented on issue #5102:
URL: https://github.com/apache/incubator-gluten/issues/5102#issuecomment-2029497878

   result is here
   ```shell
   scala> spark.read.parquet("/opt/data").createOrReplaceTempView("view")
   
   scala> spark.sql("select * from view").show
   +----------+
   |dateColumn|
   +----------+
   |2023-01-01|
   |2023-01-03|
   |2023-01-02|
   +----------+
   
   scala> val newDf = spark.sql("select cast(dateColumn as string) from view")
   newDf: org.apache.spark.sql.DataFrame = [dateColumn: string]
   
   scala> newDf.explain
   == Physical Plan ==
   VeloxColumnarToRowExec
   +- ^(3) ProjectExecTransformer [cast(dateColumn#0 as string) AS dateColumn#15]
      +- ^(3) NativeFileScan parquet [dateColumn#0] Batched: true, DataFilters: [], Format: Parquet, Location: InMemoryFileIndex(1 paths)[file:/opt/data], PartitionFilters: [], PushedFilters: [], ReadSchema: struct<dateColumn:date>
   ```


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