MERGE INTO for databricks delta lake 的 pyspark 等价物是什么？

Question

databricks documentation 描述了如何对增量表进行合并。

在SQL语法中

MERGE INTO [db_name.]target_table [AS target_alias]
USING [db_name.]source_table [<time_travel_version>] [AS source_alias]
ON <merge_condition>
[ WHEN MATCHED [ AND <condition> ] THEN <matched_action> ]
[ WHEN MATCHED [ AND <condition> ] THEN <matched_action> ]
[ WHEN NOT MATCHED [ AND <condition> ]  THEN <not_matched_action> ]

可以使用。有 python 等价物吗？

Answer 1

在 Alexandros Biratsis 的帮助下，我设法找到了文档。可以找到文档 here。

给出了这种合并的例子

deltaTable.alias("events").merge(
    source = updatesDF.alias("updates"),
    condition = "events.eventId = updates.eventId"
  ).whenMatchedUpdate(set =
    {
      "data": "updates.data",
      "count": "events.count + 1"
    }
  ).whenNotMatchedInsert(values =
    {
      "date": "updates.date",
      "eventId": "updates.eventId",
      "data": "updates.data",
      "count": "1"
    }
  ).execute()

MERGE INTO for databricks delta lake 的 pyspark 等价物是什么？

What is the pyspark equivalent of MERGE INTO for databricks delta lake?

merge

databricks

delta

delta-lake