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Pablo Langa 848bdfa218 [SPARK-29829][SQL] SHOW TABLE EXTENDED should do multi-catalog resolution 
### What changes were proposed in this pull request?

Add ShowTableStatement and make SHOW TABLE EXTENDED go through the same catalog/table resolution framework of v2 commands.

We don’t have this methods in the catalog to implement an V2 command

- catalog.getPartition
- catalog.getTempViewOrPermanentTableMetadata

### Why are the changes needed?

It's important to make all the commands have the same table resolution behavior, to avoid confusing

```sql
USE my_catalog
DESC t // success and describe the table t from my_catalog
SHOW TABLE EXTENDED FROM LIKE 't' // report table not found as there is no table t in the session catalog
```

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

Yes. When running SHOW TABLE EXTENDED Spark fails the command if the current catalog is set to a v2 catalog, or the table name specified a v2 catalog.

### How was this patch tested?

Unit tests.

Closes #26540 from planga82/feature/SPARK-29481_ShowTableExtended.

Authored-by: Pablo Langa <soypab@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
2019-11-15 14:25:33 -08:00
..
catalyst [SPARK-29829][SQL] SHOW TABLE EXTENDED should do multi-catalog resolution 2019-11-15 14:25:33 -08:00
core [SPARK-29829][SQL] SHOW TABLE EXTENDED should do multi-catalog resolution 2019-11-15 14:25:33 -08:00
hive [SPARK-29421][SQL] Supporting Create Table Like Using Provider 2019-11-11 15:25:56 +08:00
hive-thriftserver [SPARK-29873][SQL][TESTS] Support --import directive to load queries from another test case in SQLQueryTestSuite 2019-11-14 14:38:27 +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.