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Enrico Minack eccae13a5f [SPARK-30531][WEB UI] Do not render plan viz when it exists already 
### What changes were proposed in this pull request?
When you save a Spark UI SQL query page to disk and then display the html file with your browser, the query plan will be rendered a second time. This change avoids rendering the plan visualization when it exists already.

This is master:
![grafik](https://user-images.githubusercontent.com/44700269/72543429-fcb8d980-3885-11ea-82aa-c0b3638847e5.png)

And with the fix:
![grafik](https://user-images.githubusercontent.com/44700269/72543641-57523580-3886-11ea-8cdf-5fb0cdffa983.png)

### Why are the changes needed?
The duplicate query plan is unexpected and redundant.

### Does this PR introduce any user-facing change?
No.

### How was this patch tested?
Manually tested. Testing this in a reproducible way requires a running browser or HTML rendering engine that executes the JavaScript.

Closes #27238 from EnricoMi/branch-sql-ui-duplicate-plan.

Authored-by: Enrico Minack <github@enrico.minack.dev>
Signed-off-by: Sean Owen <srowen@gmail.com>
2020-01-22 19:51:08 -06:00
..
catalyst [SPARK-30606][SQL] Fix the like function with 2 parameters 2020-01-22 15:40:24 -08:00
core [SPARK-30531][WEB UI] Do not render plan viz when it exists already 2020-01-22 19:51:08 -06:00
hive [SPARK-30591][SQL] Remove the nonstandard SET OWNER syntax for namespaces 2020-01-22 16:00:05 +08:00
hive-thriftserver [SPARK-30252][SQL] Disallow negative scale of Decimal 2020-01-21 21:09:48 +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-27328][SQL] Add 'deprecated' in ExpressionDescription for extended usage and SQL doc 2019-04-09 13:49:42 +08:00
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-28980][CORE][SQL][STREAMING][MLLIB] Remove most items deprecated in Spark 2.2.0 or earlier, for Spark 3 2019-09-09 10:19:40 -05:00

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 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.