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Dongjoon Hyun 82183f7b57 [SPARK-22686][SQL] DROP TABLE IF EXISTS should not show AnalysisException 
## What changes were proposed in this pull request?

During [SPARK-22488](https://github.com/apache/spark/pull/19713) to fix view resolution issue, there occurs a regression at `2.2.1` and `master` branch like the following. This PR fixes that.

```scala
scala> spark.version
res2: String = 2.2.1

scala> sql("DROP TABLE IF EXISTS t").show
17/12/04 21:01:06 WARN DropTableCommand: org.apache.spark.sql.AnalysisException:
Table or view not found: t;
org.apache.spark.sql.AnalysisException: Table or view not found: t;
```

## How was this patch tested?

Manual.

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #19888 from dongjoon-hyun/SPARK-22686.
2017-12-06 10:52:29 +08:00
..
catalyst [SPARK-22662][SQL] Failed to prune columns after rewriting predicate subquery 2017-12-05 15:15:32 -08:00
core [SPARK-22686][SQL] DROP TABLE IF EXISTS should not show AnalysisException 2017-12-06 10:52:29 +08:00
hive [SPARK-20728][SQL] Make OrcFileFormat configurable between sql/hive and sql/core 2017-12-05 20:46:35 +08:00
hive-thriftserver [SPARK-22487][SQL][FOLLOWUP] still keep spark.sql.hive.version 2017-11-13 13:10:13 -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-21485][FOLLOWUP][SQL][DOCS] Describes examples and arguments separately, and note/since in SQL built-in function documentation 2017-08-05 10:10:56 -07:00
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-21485][SQL][DOCS] Spark SQL documentation generation for built-in functions 2017-07-26 09:38:51 -07:00

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 an extension of SQLContext called HiveContext that allows users to write queries using a subset of HiveQL and access data from a Hive Metastore using Hive SerDes. There are also wrappers that allows 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.