Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16269#discussion_r99397097
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ddl.scala ---
@@ -20,15 +20,23 @@ package org.apache.spark.sql.execution.datasources
import org.apache.spark.sql._
import org.apache.spark.sql.catalyst.TableIdentifier
import org.apache.spark.sql.catalyst.catalog.{CatalogTable, CatalogUtils}
-import org.apache.spark.sql.catalyst.plans.QueryPlan
-import org.apache.spark.sql.catalyst.plans.logical.{Command, LogicalPlan}
+import org.apache.spark.sql.catalyst.expressions.Attribute
+import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
import org.apache.spark.sql.execution.command.{DDLUtils, RunnableCommand}
import org.apache.spark.sql.types._
+/**
+ * Create a table and optionally insert some data into it. Note that this
plan is unresolved and
+ * has to be replaced by the concrete implementations during analyse.
--- End diff --
To the other reviewers, `CreateTable` is a unified unresolved logical
representation of CREATE TABLE (AS SELECT). It will be replaced by
`CreateHiveTableAsSelectCommand`, `CreateTableCommand`,
`CreateDataSourceTableCommand` or `CreateDataSourceTableAsSelectCommand`.
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