Major Description
This command will return a CREATE TABLE command in SQL. Right now, we just throw exception (I was not sure how often people will use it). Since it is a pretty standalone work (generating a CREATE TABLE command based on the metadata of a table) and people may find it pretty useful, I am thinking to get it in 2.0. Hive's implementation can be found at https://github.com/apache/hive/blob/release-1.2.1/ql/src/java/org/apache/hadoop/hive/ql/exec/DDLTask.java#L1898-L2126. The main difference for spark is that if we have a data source table, we should use Spark's syntax (CREATE TABLE ... USING ... OPTIONS) instead of Hive's syntax.
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