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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/04/14 22:08:43 UTC

[GitHub] [arrow-datafusion] andygrove opened a new issue, #2237: Add SQL query planning support for IN subqueries

andygrove opened a new issue, #2237:
URL: https://github.com/apache/arrow-datafusion/issues/2237

   **Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
   As a user of the DataFusion library for SQL parsing and logical query planning, I would like to be able to produce a valid logical plan from a SQL query containing an `IN` subquery instead of failing with `Unsupported ast node InSubquery`.
   
   Example query: `SELECT * FROM t1 WHERE id IN (SELECT id FROM t2)`
   
   **Describe the solution you'd like**
   The SQL should parse without error and produce a valid logical plan.
   
   For reference, here is an example query and logical plan from Apache Spark:
   
   ```
   scala> val df = spark.sql("SELECT * FROM t1 WHERE id IN (SELECT id FROM t2)")
   df: org.apache.spark.sql.DataFrame = [id: int, name: string]
   
   scala> df.queryExecution.logical 
   res5: org.apache.spark.sql.catalyst.plans.logical.LogicalPlan =
   'Project [*]
   +- 'Filter 'id IN (list#12 [])
      :  +- 'Project ['id]
      :     +- 'UnresolvedRelation [t2], [], false
      +- 'UnresolvedRelation [t1], [], false
   ```
   
   **Describe alternatives you've considered**
   None
   
   **Additional context**
   This does not cover optimization or physical plan. We will need to file follow-on issues for those.
   


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[GitHub] [arrow-datafusion] andygrove closed issue #2237: Add SQL query planning support for IN subqueries

Posted by GitBox <gi...@apache.org>.
andygrove closed issue #2237: Add SQL query planning support for IN subqueries
URL: https://github.com/apache/arrow-datafusion/issues/2237


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