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Liang-Chi Hsieh 50d14c98c3 [SPARK-34270][SS] Combine StateStoreMetrics should not override StateStoreCustomMetric 
### What changes were proposed in this pull request?

This patch proposes to sum up custom metric values instead of taking arbitrary one when combining `StateStoreMetrics`.

### Why are the changes needed?

For stateful join in structured streaming, we need to combine `StateStoreMetrics` from both left and right side. Currently we simply take arbitrary one from custom metrics with same name from left and right. By doing this we miss half of metric number.

### Does this PR introduce _any_ user-facing change?

Yes, this corrects metrics collected for stateful join.

### How was this patch tested?

Unit test.

Closes #31369 from viirya/SPARK-34270.

Authored-by: Liang-Chi Hsieh <viirya@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
2021-01-29 20:50:39 -08:00
..
catalyst [SPARK-33601][SQL] Group exception messages in catalyst/parser 2021-01-29 08:57:58 +00:00
core [SPARK-34270][SS] Combine StateStoreMetrics should not override StateStoreCustomMetric 2021-01-29 20:50:39 -08:00
hive [SPARK-33212][FOLLOW-UP][BUILD] Fix test "built-in Hadoop version should support shaded client" for hadoop-2.7 2021-01-29 15:47:02 +09:00
hive-thriftserver [SPARK-34269][SQL] Simplify SQL view resolution 2021-01-29 06:46:01 +00:00
create-docs.sh [SPARK-34010][SQL][DODCS] Use python3 instead of python in SQL documentation build 2021-01-05 19:48:10 +09:00
gen-sql-api-docs.py [SPARK-34022][DOCS][FOLLOW-UP] Fix typo in SQL built-in function docs 2021-01-06 09:28:22 -08:00
gen-sql-config-docs.py [SPARK-31550][SQL][DOCS] Set nondeterministic configurations with general meanings in sql configuration doc 2020-04-27 17:08:52 +09:00
gen-sql-functions-docs.py [SPARK-31562][SQL] Update ExpressionDescription for substring, current_date, and current_timestamp 2020-04-26 11:46:52 -07:00
mkdocs.yml [SPARK-30731] Update deprecated Mkdocs option 2020-02-19 17:28:58 +09:00
README.md [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00

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, and SQL configuration documentation that gets included as part of configuration.md in the main docs directory.