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diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md index 0f6e344655..f4c89e58fa 100644 --- a/docs/sql-programming-guide.md +++ b/docs/sql-programming-guide.md @@ -1413,6 +1413,14 @@ options. - Dataset and DataFrame API `explode` has been deprecated, alternatively, use `functions.explode()` with `select` or `flatMap` - Dataset and DataFrame API `registerTempTable` has been deprecated and replaced by `createOrReplaceTempView` + - Changes to `CREATE TABLE ... LOCATION` behavior for Hive tables. + - From Spark 2.0, `CREATE TABLE ... LOCATION` is equivalent to `CREATE EXTERNAL TABLE ... LOCATION` + in order to prevent accidental dropping the existing data in the user-provided locations. + That means, a Hive table created in Spark SQL with the user-specified location is always a Hive external table. + Dropping external tables will not remove the data. Users are not allowed to specify the location for Hive managed tables. + Note that this is different from the Hive behavior. + - As a result, `DROP TABLE` statements on those tables will not remove the data. + ## Upgrading From Spark SQL 1.5 to 1.6 - From Spark 1.6, by default the Thrift server runs in multi-session mode. Which means each JDBC/ODBC |