Github user janewangfb commented on a diff in the pull request:
https://github.com/apache/spark/pull/18975#discussion_r136724258
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
---
@@ -178,11 +179,50 @@ class AstBuilder(conf: SQLConf) extends
SqlBaseBaseVisitor[AnyRef] with Logging
}
/**
- * Add an INSERT INTO [TABLE]/INSERT OVERWRITE TABLE operation to the
logical plan.
+ * Parameters used for writing query to a directory: (isLocal,
CatalogStorageFormat, provider).
+ */
+ type InsertDirParams = (Boolean, CatalogStorageFormat, Option[String])
+
+ /**
+ * Add an
+ * INSERT INTO [TABLE] or
+ * INSERT OVERWRITE TABLE or
+ * INSERT OVERWRITE [LOCAL] DIRECTORY
+ * operation to logical plan
*/
private def withInsertInto(
ctx: InsertIntoContext,
query: LogicalPlan): LogicalPlan = withOrigin(ctx) {
+ assert(ctx.children.size == 1)
--- End diff --
it means for insert into can only specify one case, either
insert overwrite local directory path rowFormat....
or
insert overwrite local directiory path using....
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