c28da672f8
### What changes were proposed in this pull request? Override the default implementation of `JdbcDialect.renameTable()`: ```scala s"ALTER TABLE $oldTable RENAME TO $newTable" ``` in the following JDBC dialects according to official documentation: - DB2 - Derby - MS SQL Server - Teradata Other dialects follow the default implementation: - MySQL: https://dev.mysql.com/doc/refman/8.0/en/alter-table.html - Oracle: https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/ALTER-TABLE.html#GUID-552E7373-BF93-477D-9DA3-B2C9386F2877 - PostgreSQL: https://www.postgresql.org/docs/12/sql-altertable.html ### Why are the changes needed? To have correct implementation of table renaming for all supported JDBC dialects. ### Does this PR introduce _any_ user-facing change? Yes ### How was this patch tested? Manually Closes #29237 from MaxGekk/jdbc-rename-table. Authored-by: Max Gekk <max.gekk@gmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
||
---|---|---|
.. | ||
catalyst | ||
core | ||
hive | ||
hive-thriftserver | ||
create-docs.sh | ||
gen-sql-api-docs.py | ||
gen-sql-config-docs.py | ||
gen-sql-functions-docs.py | ||
mkdocs.yml | ||
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.