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62 lines
3.4 KiB
Bash
Executable File
62 lines
3.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Tags: no-debug
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CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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# shellcheck source=../shell_config.sh
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. "$CURDIR"/../shell_config.sh
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# shellcheck source=./mergetree_mutations.lib
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. "$CURDIR"/mergetree_mutations.lib
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${CLICKHOUSE_CLIENT} --query="DROP TABLE IF EXISTS kill_mutation"
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${CLICKHOUSE_CLIENT} --query="CREATE TABLE kill_mutation(d Date, x UInt32, s String) ENGINE MergeTree ORDER BY x PARTITION BY d"
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${CLICKHOUSE_CLIENT} --query="INSERT INTO kill_mutation VALUES ('2000-01-01', 1, 'a')"
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${CLICKHOUSE_CLIENT} --query="INSERT INTO kill_mutation VALUES ('2001-01-01', 2, 'b')"
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${CLICKHOUSE_CLIENT} --query="SELECT '*** Create and kill a single invalid mutation ***'"
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${CLICKHOUSE_CLIENT} --query="ALTER TABLE kill_mutation DELETE WHERE toUInt32(s) = 1 SETTINGS mutations_sync = 1" 2>/dev/null
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${CLICKHOUSE_CLIENT} --query="SELECT count() FROM system.mutations WHERE database = '$CLICKHOUSE_DATABASE' AND table = 'kill_mutation' and is_done = 0"
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${CLICKHOUSE_CLIENT} --query="KILL MUTATION WHERE database = '$CLICKHOUSE_DATABASE' AND table = 'kill_mutation'"
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${CLICKHOUSE_CLIENT} --query="SELECT mutation_id FROM system.mutations WHERE database = '$CLICKHOUSE_DATABASE' AND table = 'kill_mutation'"
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${CLICKHOUSE_CLIENT} --query="SELECT '*** Create and kill invalid mutation that blocks another mutation ***'"
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# Note: there is a benign race condition.
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# The mutation can fail with the message
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# "Cannot parse string 'a' as UInt32"
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# or
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# "Cannot parse string 'b' as UInt32"
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# depending on which parts are processed first.
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# The mutations are also coalesced together, and the subsequent mutation inherits the failure status of the original mutation.
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# When we are waiting for mutations, we are listing all the mutations with identical error messages.
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# But due to a race condition and to repeated runs, the original and subsequent mutations can have different error messages,
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# therefore the original mutation will not be included in the list.
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# Originally, there was grep "happened during execution of mutations 'mutation_4.txt, mutation_5.txt'",
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# but due to this race condition, I've replaced it to grep "happened during execution of mutation"
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${CLICKHOUSE_CLIENT} --query="ALTER TABLE kill_mutation DELETE WHERE toUInt32(s) = 1"
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${CLICKHOUSE_CLIENT} --query="ALTER TABLE kill_mutation DELETE WHERE x = 1 SETTINGS mutations_sync = 1" 2>&1 | grep -o "happened during execution of mutation" | head -n 1
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# but exception doesn't stop mutations, and we will still see them in system.mutations
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${CLICKHOUSE_CLIENT} --query="SELECT count() FROM system.mutations WHERE database = '$CLICKHOUSE_DATABASE' AND table = 'kill_mutation' AND mutation_id = 'mutation_4.txt'" # 1
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# waiting test kill_mutation mutation_4.txt DELETE WHERE toUInt32(s) = 1
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${CLICKHOUSE_CLIENT} --query="KILL MUTATION WHERE database = '$CLICKHOUSE_DATABASE' AND table = 'kill_mutation' AND mutation_id = 'mutation_4.txt'"
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# just to wait previous mutation to finish (and don't poll system.mutations), doesn't affect data
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${CLICKHOUSE_CLIENT} --query="ALTER TABLE kill_mutation DELETE WHERE x = 1 SETTINGS mutations_sync = 1"
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${CLICKHOUSE_CLIENT} --query="SELECT * FROM kill_mutation" # 2001-01-01 2 b
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# must always be empty
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${CLICKHOUSE_CLIENT} --query="SELECT * FROM system.mutations WHERE table = 'kill_mutation' AND database = '$CLICKHOUSE_DATABASE' AND is_done = 0"
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${CLICKHOUSE_CLIENT} --query="DROP TABLE kill_mutation"
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