a6114d8fb8
### What changes were proposed in this pull request? This PR intends to fix a bug where references can be missing when adding aliases to widen data types in `WidenSetOperationTypes`. For example, ``` CREATE OR REPLACE TEMPORARY VIEW t3 AS VALUES (decimal(1)) tbl(v); SELECT t.v FROM ( SELECT v FROM t3 UNION ALL SELECT v + v AS v FROM t3 ) t; org.apache.spark.sql.AnalysisException: Resolved attribute(s) v#1 missing from v#3 in operator !Project [v#1]. Attribute(s) with the same name appear in the operation: v. Please check if the right attribute(s) are used.;; !Project [v#1] <------ the reference got missing +- SubqueryAlias t +- Union :- Project [cast(v#1 as decimal(11,0)) AS v#3] : +- Project [v#1] : +- SubqueryAlias t3 : +- SubqueryAlias tbl : +- LocalRelation [v#1] +- Project [v#2] +- Project [CheckOverflow((promote_precision(cast(v#1 as decimal(11,0))) + promote_precision(cast(v#1 as decimal(11,0)))), DecimalType(11,0), true) AS v#2] +- SubqueryAlias t3 +- SubqueryAlias tbl +- LocalRelation [v#1] ``` In the case, `WidenSetOperationTypes` added the alias `cast(v#1 as decimal(11,0)) AS v#3`, then the reference in the top `Project` got missing. This PR correct the reference (`exprId` and widen `dataType`) after adding aliases in the rule. ### Why are the changes needed? bugfixes ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Added unit tests Closes #29485 from maropu/SPARK-32638. Authored-by: Takeshi Yamamuro <yamamuro@apache.org> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
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.. | ||
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.