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ulysses-you c7fb0e18be [SPARK-35629][SQL] Use better exception type if database doesn't exist on drop database 
### What changes were proposed in this pull request?

Add database if exists check in `SeesionCatalog`

### Why are the changes needed?

Curently execute `drop database test` will throw unfriendly error msg.

```
Error in query: org.apache.hadoop.hive.metastore.api.NoSuchObjectException: test
org.apache.spark.sql.AnalysisException: org.apache.hadoop.hive.metastore.api.NoSuchObjectException: test
	at org.apache.spark.sql.hive.HiveExternalCatalog.withClient(HiveExternalCatalog.scala:112)
	at org.apache.spark.sql.hive.HiveExternalCatalog.dropDatabase(HiveExternalCatalog.scala:200)
	at org.apache.spark.sql.catalyst.catalog.ExternalCatalogWithListener.dropDatabase(ExternalCatalogWithListener.scala:53)
	at org.apache.spark.sql.catalyst.catalog.SessionCatalog.dropDatabase(SessionCatalog.scala:273)
	at org.apache.spark.sql.execution.command.DropDatabaseCommand.run(ddl.scala:111)
	at org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:75)
	at org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:73)
	at org.apache.spark.sql.execution.command.ExecutedCommandExec.executeCollect(commands.scala:84)
	at org.apache.spark.sql.Dataset.$anonfun$logicalPlan$1(Dataset.scala:228)
	at org.apache.spark.sql.Dataset.$anonfun$withAction$1(Dataset.scala:3707)
```

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

Yes, more cleaner error msg.

### How was this patch tested?

Add test.

Closes #32768 from ulysses-you/SPARK-35629.

Authored-by: ulysses-you <ulyssesyou18@gmail.com>
Signed-off-by: Gengliang Wang <gengliang@apache.org>
2021-06-04 15:52:21 +08:00
..
catalyst [SPARK-35629][SQL] Use better exception type if database doesn't exist on drop database 2021-06-04 15:52:21 +08:00
core [SPARK-35629][SQL] Use better exception type if database doesn't exist on drop database 2021-06-04 15:52:21 +08:00
hive [SPARK-35612][SQL] Support LZ4 compression in ORC data source 2021-06-03 14:07:26 -07:00
hive-thriftserver [SPARK-21957][SQL] Support current_user function 2021-06-02 13:04:40 +00:00
create-docs.sh [SPARK-34010][SQL][DODCS] Use python3 instead of python in SQL documentation build 2021-01-05 19:48:10 +09:00
gen-sql-api-docs.py [SPARK-34747][SQL][DOCS] Add virtual operators to the built-in function document 2021-03-19 10:19:26 +09:00
gen-sql-config-docs.py [SPARK-32194][PYTHON] Use proper exception classes instead of plain Exception 2021-05-26 11:54:40 +09:00
gen-sql-functions-docs.py [SPARK-31562][SQL] Update ExpressionDescription for substring, current_date, and current_timestamp 2020-04-26 11:46:52 -07:00
mkdocs.yml [SPARK-30731] Update deprecated Mkdocs option 2020-02-19 17:28:58 +09:00
README.md

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, and SQL configuration documentation that gets included as part of configuration.md in the main docs directory.