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MCOL-5279 This commit fixes the corner case of the issue that can rarely happen when flow control is used to backpressure PPs that overflows EM with Primitive messages. It also adds a relevant test that makes sense in a multi-node scenario only. (#2605)

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Co-authored-by: Roman Nozdrin <rnozdrin@mariadb.com>
This commit is contained in:
Roman Nozdrin
2022-11-04 00:36:54 +03:00
committed by GitHub
parent 88404f70f1
commit 09d785fc9b
3 changed files with 42 additions and 6 deletions
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10
mysql-test/columnstore/multinode/mcol-5279.result Normal file
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DROP DATABASE IF EXISTS mcol_5279;
CREATE DATABASE mcol_5279;
USE mcol_5279;
CREATE TABLE `dd`( `acct_sk` INT(11) UNSIGNED NOT NULL, `acct_id` VARCHAR(128) NOT NULL DEFAULT 'None', `db_source_sk` INT(11) UNSIGNED NOT NULL) ENGINE=Columnstore DEFAULT CHARSET=utf8mb4;
CREATE TABLE `ff` ( `db_source_sk` INT(11) UNSIGNED NOT NULL, `acct_id` VARCHAR(128) NOT NULL DEFAULT 'None', `acct_sk` INT(11) UNSIGNED NOT NULL DEFAULT 0 ) ENGINE=Columnstore DEFAULT CHARSET=utf8mb4;
INSERT INTO dd SELECT ROUND(RAND() * 10, 2), substring(MD5(RAND()),1,1), ROUND(RAND() * 100, 2) FROM seq_1_to_300000;
INSERT INTO ff SELECT ROUND(RAND() * 10, 2), substring(MD5(RAND()),1,1), ROUND(RAND() * 100, 2) FROM seq_1_to_300000;
SELECT * FROM (SELECT ff.acct_id, COUNT(1) FROM ff JOIN dd ON ff.acct_sk =dd.acct_sk AND ff.db_source_sk =dd.db_source_sk GROUP BY ff.acct_id LIMIT 10)s LIMIT 0;
acct_id COUNT(1)
DROP DATABASE mcol_5279;

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mysql-test/columnstore/multinode/mcol-5279.test Normal file
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#
# Test based on Jira MCOL-5279
# Author: Roman Nozdrin roman.nozdrin@mariadb.com
#
-- source ../include/have_columnstore.inc
--disable_warnings
DROP DATABASE IF EXISTS mcol_5279;
--enable_warnings
CREATE DATABASE mcol_5279;
USE mcol_5279;
# This test makes sense when run on a multi-node cluster.
CREATE TABLE `dd`( `acct_sk` INT(11) UNSIGNED NOT NULL, `acct_id` VARCHAR(128) NOT NULL DEFAULT 'None', `db_source_sk` INT(11) UNSIGNED NOT NULL) ENGINE=Columnstore DEFAULT CHARSET=utf8mb4;
CREATE TABLE `ff` ( `db_source_sk` INT(11) UNSIGNED NOT NULL, `acct_id` VARCHAR(128) NOT NULL DEFAULT 'None', `acct_sk` INT(11) UNSIGNED NOT NULL DEFAULT 0 ) ENGINE=Columnstore DEFAULT CHARSET=utf8mb4;
INSERT INTO dd SELECT ROUND(RAND() * 10, 2), substring(MD5(RAND()),1,1), ROUND(RAND() * 100, 2) FROM seq_1_to_300000;
INSERT INTO ff SELECT ROUND(RAND() * 10, 2), substring(MD5(RAND()),1,1), ROUND(RAND() * 100, 2) FROM seq_1_to_300000;
# The purpose is to run the statement that doesn't hang.
SELECT * FROM (SELECT ff.acct_id, COUNT(1) FROM ff JOIN dd ON ff.acct_sk =dd.acct_sk AND ff.db_source_sk =dd.db_source_sk GROUP BY ff.acct_id LIMIT 10)s LIMIT 0;
# Clean UP
DROP DATABASE mcol_5279;