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https://github.com/ClickHouse/ClickHouse.git
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32 lines
1.3 KiB
Bash
Executable File
32 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Tags: no-fasttest
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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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# A question for curious reader:
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# How to break shell pipeline as soon as 5 lines are found in the following command:
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# ./my-program | head -n5
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# When I tried to do it, pipeline was not actively terminated,
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# unless the my-program will try to output a thousand more lines overflowing pipe buffer and terminating with Broken Pipe.
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# But if my program just output 5 (or slightly more) lines and hang up, the pipeline is not terminated.
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function test()
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{
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timeout 5 ${CLICKHOUSE_LOCAL} --max_execution_time 10 --max_rows_to_read 0 --query "
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SELECT DISTINCT number % 5 FROM system.numbers" ||:
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echo -e '---'
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timeout 5 ${CLICKHOUSE_CURL} -sS --no-buffer "${CLICKHOUSE_URL}&max_execution_time=10&max_rows_to_read=0" --data-binary "
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SELECT DISTINCT number % 5 FROM system.numbers" ||:
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echo -e '---'
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}
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# The test depends on timeouts. And there is a chance that under high system load the query
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# will not be able to finish in 5 seconds (this will lead to test flakiness).
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# Let's check that is will be able to show the expected result at least once.
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while true; do
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[[ $(test) == $(echo -ne "0\n1\n2\n3\n4\n---\n0\n1\n2\n3\n4\n---\n") ]] && break
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sleep 1
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done
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