mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-13 11:04:10 +00:00
57 lines
1.3 KiB
Bash
Executable File
57 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -e
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CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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. "$CURDIR"/../shell_config.sh
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$CLICKHOUSE_CLIENT --multiquery <<EOF
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DROP TABLE IF EXISTS src;
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DROP TABLE IF EXISTS mv;
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CREATE TABLE src (v UInt64) ENGINE = Null;
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CREATE MATERIALIZED VIEW mv (v UInt8) Engine = MergeTree() ORDER BY v AS SELECT v FROM src;
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EOF
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# Test that ALTER doesn't cause data loss or duplication.
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#
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# Idea for future:
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#
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# null
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# / \
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# mv1 mv2
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# \ /
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# \ /
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# mv sink
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#
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# Insert N times into null while altering sink query and switching it from mv1 to mv2.
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function alter_thread()
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{
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trap 'exit' INT
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ALTERS[0]="ALTER TABLE mv MODIFY QUERY SELECT v FROM src;"
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ALTERS[1]="ALTER TABLE mv MODIFY QUERY SELECT v * 2 as v FROM src;"
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while true; do
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$CLICKHOUSE_CLIENT --allow_experimental_alter_materialized_view_structure=1 -q "${ALTERS[$RANDOM % 2]}"
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sleep "$(echo 0.$RANDOM)";
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done
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}
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export -f alter_thread;
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timeout 10 bash -c alter_thread &
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for _ in {1..100}; do
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# Retry (hopefully retriable (deadlock avoided)) errors.
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while true; do
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$CLICKHOUSE_CLIENT -q "INSERT INTO src VALUES (1);" 2>/dev/null && break
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done
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done
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$CLICKHOUSE_CLIENT -q "SELECT count() FROM mv;"
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wait
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$CLICKHOUSE_CLIENT -q "DROP VIEW mv"
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$CLICKHOUSE_CLIENT -q "DROP TABLE src"
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