Added test.

tests/queries/0_stateless/01232_preparing_sets_race_condition.reference

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tests/queries/0_stateless/01232_preparing_sets_race_condition.sh

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+#!/usr/bin/env bash
+
+CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+. $CURDIR/../shell_config.sh
+
+set -o errexit
+set -o pipefail
+
+
+echo "
+    DROP TABLE if exists tableA;
+    DROP TABLE if exists tableB;
+
+    create table tableA (id UInt64, col1 UInt64, colDate Date) engine = ReplacingMergeTree(colDate, id, 8192);
+    create table tableB (id UInt64, Aid UInt64, colDate Date) engine = ReplacingMergeTree(colDate, id, 8192);
+
+    insert into tableA select number, number % 10, addDays(toDate('2020-01-01'), - number % 1000) from numbers(100000);
+    insert into tableB select number, number % 100000, addDays(toDate('2020-01-01'), number % 90) from numbers(50000000);
+" | $CLICKHOUSE_CLIENT -n
+
+for i in {1..10}; do echo "
+SELECT tableName
+FROM 
+    (
+        SELECT 
+            col1, 
+            'T1_notJoin1' AS tableName, 
+            count(*) AS c
+        FROM tableA
+        GROUP BY col1
+        UNION ALL
+        SELECT 
+            a.col1, 
+            'T2_filteredAfterJoin1' AS tableName, 
+            count(*) AS c
+        FROM tableB AS b
+        INNER JOIN tableA AS a ON a.id = b.Aid
+        WHERE b.colDate = '2020-01-01'
+        GROUP BY a.col1
+        UNION ALL
+        SELECT 
+            a.col1, 
+            'T3_filteredAfterJoin2' AS tableName, 
+            count(*) AS c
+        FROM tableB AS b
+            INNER JOIN
+            tableA AS a
+            ON a.id = b.Aid
+        WHERE b.colDate = '2020-01-02'
+        GROUP BY a.col1
+        UNION ALL
+        SELECT 
+            a.col1, 
+            'T4_filteredBeforeJoin1' AS tableName, 
+            count(*) AS c
+        FROM tableA AS a
+        INNER JOIN 
+        (
+            SELECT 
+                Aid
+            FROM tableB
+            WHERE colDate = '2020-01-01'
+        ) AS b ON a.id = b.Aid
+        GROUP BY a.col1
+        UNION ALL
+        SELECT 
+            a.col1, 
+            'T5_filteredBeforeJoin2' AS tableName, 
+            count(*) AS c
+        FROM tableA AS a
+        INNER JOIN 
+        (
+            SELECT 
+                Aid
+            FROM tableB
+            WHERE colDate = '2020-01-02'
+        ) AS b ON a.id = b.Aid
+        GROUP BY a.col1
+        UNION ALL
+        SELECT 
+            a.col1, 
+            'T6_filteredAfterJoin3' AS tableName, 
+            count(*) AS c
+        FROM tableB AS b
+        INNER JOIN tableA AS a ON a.id = b.Aid
+        WHERE b.colDate = '2020-01-03'
+        GROUP BY a.col1
+        UNION ALL
+        SELECT 
+            col1, 
+            'T7_notJoin2' AS tableName, 
+            count(*) AS c
+        FROM tableA
+        GROUP BY col1
+        UNION ALL
+        SELECT 
+            a.col1, 
+            'T8_filteredBeforeJoin3' AS tableName, 
+            count(*) AS c
+        FROM tableA AS a
+        INNER JOIN 
+        (
+            SELECT 
+                Aid
+            FROM tableB
+            WHERE colDate = '2020-01-03'
+        ) AS b ON a.id = b.Aid
+        GROUP BY a.col1
+    ) AS a
+GROUP BY tableName
+ORDER BY tableName ASC;
+" | $CLICKHOUSE_CLIENT -n | wc -l ; done;
+
+echo "
+    DROP TABLE tableA;
+    DROP TABLE tableB;
+" | $CLICKHOUSE_CLIENT -n