See REORG TABLE.Operations that create soft-deletes in Delta Lake include the following:Dropping columns with column mapping enabled. Deleting rows with deletion vectors enabled. Any data modifications on Photon-enabled clusters when deletion vectors are enabled....
dangerousVACUUMcommand. If you are certain that there are no operations being performed on this table that take longer than the retention interval you plan to specify, you can turn off this safety check by setting the Spark configuration propertyspark.databricks.delta.retentionDurationCheck.enabledto...
import static org.apache.spark.sql.functions.*; Column maxOnWindow = max(col("val")).over(Window.partitionBy("id")); DataFrame df2 = df1 .withColumn("max", maxOnWindow) .where(col("val").lt(col("max"))) .select("id", "val"); 这是一篇关于窗口函数的好文章:https://databricks.com...
See REORG TABLE. Operations that create soft-deletes in Delta Lake include the following: Dropping columns with column mapping enabled. Deleting rows with deletion vectors enabled. Any data modifications on Photon-enabled clusters when deletion vectors are enabled. With soft-deletes enabled, old ...
dangerousVACUUMcommand. If you are certain that there are no operations being performed on this table that take longer than the retention interval you plan to specify, you can turn off this safety check by setting the Spark configuration propertyspark.databricks.delta.retentionDurationCheck.enabledto...
See REORG TABLE.Operations that create soft-deletes in Delta Lake include the following:Dropping columns with column mapping enabled. Deleting rows with deletion vectors enabled. Any data modifications on Photon-enabled clusters when deletion vectors are enabled....
See REORG TABLE.Operations that create soft-deletes in Delta Lake include the following:Dropping columns with column mapping enabled. Deleting rows with deletion vectors enabled. Any data modifications on Photon-enabled clusters when deletion vectors are enabled....
dangerousVACUUMcommand. If you are certain that there are no operations being performed on this table that take longer than the retention interval you plan to specify, you can turn off this safety check by setting the Spark configuration propertyspark.databricks.delta.retentionDurationCheck.enabledto...
See REORG TABLE.Operations that create soft-deletes in Delta Lake include the following:Dropping columns with column mapping enabled. Deleting rows with deletion vectors enabled. Any data modifications on Photon-enabled clusters when deletion vectors are enabled....
See REORG TABLE.Operations that create soft-deletes in Delta Lake include the following:Dropping columns with column mapping enabled. Deleting rows with deletion vectors enabled. Any data modifications on Photon-enabled clusters when deletion vectors are enabled....