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## What changes were proposed in this pull request? The `quotedString` method in `TableIdentifier` and `FunctionIdentifier` produce an illegal (un-parseable) name when the name contains a backtick. For example: ``` import org.apache.spark.sql.catalyst.parser.CatalystSqlParser._ import org.apache.spark.sql.catalyst.TableIdentifier import org.apache.spark.sql.catalyst.analysis.UnresolvedAttribute val complexName = TableIdentifier("`weird`table`name", Some("`d`b`1")) parseTableIdentifier(complexName.unquotedString) // Does not work parseTableIdentifier(complexName.quotedString) // Does not work parseExpression(complexName.unquotedString) // Does not work parseExpression(complexName.quotedString) // Does not work ``` We should handle the backtick properly to make `quotedString` parseable. ## How was this patch tested? Add new testcases in `TableIdentifierParserSuite` and `ExpressionParserSuite`. Author: jiangxingbo <jiangxb1987@gmail.com> Closes #15403 from jiangxb1987/backtick. |
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hive | ||
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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.