Skip to content
Snippets Groups Projects
Select Git revision
  • working
  • baesline-eviction-with-logging
  • evict-by-size
  • master default protected
  • v2.3.0
  • v2.3.0-rc4
  • v2.3.0-rc3
  • v2.3.0-rc2
  • v2.3.0-rc1
  • v2.2.1
  • v2.2.1-rc2
  • v2.2.1-rc1
  • v2.1.2
  • v2.1.2-rc4
  • v2.1.2-rc3
  • v2.1.2-rc2
  • v2.1.2-rc1
  • v2.2.0
  • v2.1.1
  • v2.1.0
  • v2.0.2
  • v1.6.3
  • v2.0.1
  • v2.0.0
24 results
Compare
user avatar
[SPARK-18801][SQL][FOLLOWUP] Alias the view with its child
jiangxingbo authored 
## What changes were proposed in this pull request?

This PR is a follow-up to address the comments https://github.com/apache/spark/pull/16233/files#r95669988 and https://github.com/apache/spark/pull/16233/files#r95662299.

We try to wrap the child by:
1. Generate the `queryOutput` by:
    1.1. If the query column names are defined, map the column names to attributes in the child output by name;
    1.2. Else set the child output attributes to `queryOutput`.
2. Map the `queryQutput` to view output by index, if the corresponding attributes don't match, try to up cast and alias the attribute in `queryOutput` to the attribute in the view output.
3. Add a Project over the child, with the new output generated by the previous steps.
If the view output doesn't have the same number of columns neither with the child output, nor with the query column names, throw an AnalysisException.

## How was this patch tested?

Add new test cases in `SQLViewSuite`.

Author: jiangxingbo <jiangxb1987@gmail.com>

Closes #16561 from jiangxb1987/alias-view.
e635cbb6
History
user avatar e635cbb6
History
Name Last commit Last update
..
catalyst
core
hive-thriftserver
hive
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 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.