MaxGekk opened a new pull request #31308: URL: https://github.com/apache/spark/pull/31308
### What changes were proposed in this pull request? Invoke `CatalogImpl.refreshTable()` instead of combination of `SessionCatalog.refreshTable()` + `uncacheQuery()`. This allows to clear cached table data while keeping the table cached. ### Why are the changes needed? 1. To improve user experience with Spark SQL 2. To be consistent to other commands, see https://github.com/apache/spark/pull/31206 ### Does this PR introduce _any_ user-facing change? Yes. Before: ```scala scala> sql("CREATE TABLE tbl (c0 int)") res1: org.apache.spark.sql.DataFrame = [] scala> sql("INSERT INTO tbl SELECT 0") res2: org.apache.spark.sql.DataFrame = [] scala> sql("CACHE TABLE tbl") res3: org.apache.spark.sql.DataFrame = [] scala> sql("SELECT * FROM tbl").show(false) +---+ |c0 | +---+ |0 | +---+ scala> spark.catalog.isCached("tbl") res5: Boolean = true scala> sql("TRUNCATE TABLE tbl") res6: org.apache.spark.sql.DataFrame = [] scala> spark.catalog.isCached("tbl") res7: Boolean = false ``` After: ```scala scala> sql("TRUNCATE TABLE tbl") res6: org.apache.spark.sql.DataFrame = [] scala> spark.catalog.isCached("tbl") res7: Boolean = true ``` ### How was this patch tested? Added new test to `CachedTableSuite`: ``` $ build/sbt -Phive -Phive-thriftserver "test:testOnly *CachedTableSuite" $ build/sbt -Phive -Phive-thriftserver "test:testOnly *CatalogedDDLSuite" ``` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
