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Terry Kim 3d45779b68 [SPARK-29728][SQL] Datasource V2: Support ALTER TABLE RENAME TO 
### What changes were proposed in this pull request?

This PR adds `ALTER TABLE a.b.c RENAME TO x.y.x` support for V2 catalogs.

### Why are the changes needed?

The current implementation doesn't support this command V2 catalogs.

### Does this PR introduce any user-facing change?

Yes, now the renaming table works for v2 catalogs:
```
scala> spark.sql("SHOW TABLES IN testcat.ns1.ns2").show
+---------+---------+
|namespace|tableName|
+---------+---------+
|  ns1.ns2|      old|
+---------+---------+

scala> spark.sql("ALTER TABLE testcat.ns1.ns2.old RENAME TO testcat.ns1.ns2.new").show

scala> spark.sql("SHOW TABLES IN testcat.ns1.ns2").show
+---------+---------+
|namespace|tableName|
+---------+---------+
|  ns1.ns2|      new|
+---------+---------+
```
### How was this patch tested?

Added unit tests.

Closes #26539 from imback82/rename_table.

Authored-by: Terry Kim <yuminkim@gmail.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>
2019-11-19 12:03:29 +08:00
..
catalyst [SPARK-29728][SQL] Datasource V2: Support ALTER TABLE RENAME TO 2019-11-19 12:03:29 +08:00
core [SPARK-29728][SQL] Datasource V2: Support ALTER TABLE RENAME TO 2019-11-19 12:03:29 +08:00
hive [SPARK-29923][SQL][TESTS] Set io.netty.tryReflectionSetAccessible for Arrow on JDK9+ 2019-11-15 23:58:15 -08:00
hive-thriftserver [SPARK-28527][FOLLOW-UP][SQL][TEST] Add guides for ThriftServerQueryTestSuite 2019-11-18 18:13:11 -08:00
create-docs.sh [MINOR][DOCS] Minor doc fixes related with doc build and uses script dir in SQL doc gen script 2017-08-26 13:56:24 +09:00
gen-sql-markdown.py [SPARK-27328][SQL] Add 'deprecated' in ExpressionDescription for extended usage and SQL doc 2019-04-09 13:49:42 +08:00
mkdocs.yml [SPARK-21485][SQL][DOCS] Spark SQL documentation generation for built-in functions 2017-07-26 09:38:51 -07:00
README.md [SPARK-28980][CORE][SQL][STREAMING][MLLIB] Remove most items deprecated in Spark 2.2.0 or earlier, for Spark 3 2019-09-09 10:19:40 -05:00

README.md

Spark SQL

This module provides support for executing relational queries expressed in either SQL or the DataFrame/Dataset API.

Spark SQL is broken up into four subprojects:

  • Catalyst (sql/catalyst) - An implementation-agnostic framework for manipulating trees of relational operators and expressions.
  • Execution (sql/core) - A query planner / execution engine for translating Catalyst's logical query plans into Spark RDDs. This component also includes a new public interface, SQLContext, that allows users to execute SQL or LINQ statements against existing RDDs and Parquet files.
  • Hive Support (sql/hive) - Includes extensions that allow users to write queries using a subset of HiveQL and access data from a Hive Metastore using Hive SerDes. There are also wrappers that allow users to run queries that include Hive UDFs, UDAFs, and UDTFs.
  • HiveServer and CLI support (sql/hive-thriftserver) - Includes support for the SQL CLI (bin/spark-sql) and a HiveServer2 (for JDBC/ODBC) compatible server.

Running ./sql/create-docs.sh generates SQL documentation for built-in functions under sql/site.