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https://github.com/ClickHouse/ClickHouse.git
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84 lines
3.1 KiB
Bash
Executable File
84 lines
3.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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. "$CURDIR"/../shell_config.sh
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WORKING_FOLDER_01528="${CLICKHOUSE_TMP}/01528_clickhouse_local_prepare_parts"
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rm -rf "${WORKING_FOLDER_01528}"
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mkdir -p "${WORKING_FOLDER_01528}/metadata/local"
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## Checks scenario of preparing parts offline by clickhouse-local
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## that is the metadata for the table we want to fill
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## schema should match the schema of the table from server
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## (the easiest way is just to copy it from the server)
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cat <<EOF > "${WORKING_FOLDER_01528}/metadata/local/test.sql"
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ATTACH TABLE local.test (id UInt64, d Date, s String) Engine=MergeTree ORDER BY id PARTITION BY toYYYYMM(d);
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EOF
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#################
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echo "Option 1. Prepare parts from from table with Engine=File defined in metadata, read from an arbitrary path"
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## Source file:
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cat <<EOF > "${WORKING_FOLDER_01528}/data.csv"
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1,2020-01-01,"String"
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2,2020-02-02,"Another string"
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3,2020-03-03,"One more string"
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4,2020-01-02,"String for first partition"
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EOF
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## metadata written into file
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cat <<EOF > "${WORKING_FOLDER_01528}/metadata/local/data_csv.sql"
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ATTACH TABLE local.data_csv (id UInt64, d Date, s String) Engine=File(CSV, '${WORKING_FOLDER_01528}/data.csv');
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EOF
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## feed the table
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${CLICKHOUSE_LOCAL} --query "INSERT INTO local.test SELECT * FROM local.data_csv;" -- --path="${WORKING_FOLDER_01528}"
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## check the parts were created
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${CLICKHOUSE_LOCAL} --query "SELECT * FROM local.test WHERE id < 10 ORDER BY id;" -- --path="${WORKING_FOLDER_01528}"
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#################
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echo "Option 2. Prepare parts from from table with Engine=File defined in metadata, read from stdin (pipe)"
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cat <<EOF > "${WORKING_FOLDER_01528}/metadata/local/stdin.sql"
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ATTACH TABLE local.stdin (id UInt64, d Date, s String) Engine=File(CSV, stdin);
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EOF
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cat <<EOF | ${CLICKHOUSE_LOCAL} --query "INSERT INTO local.test SELECT * FROM local.stdin;" -- --path="${WORKING_FOLDER_01528}"
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11,2020-01-01,"String"
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12,2020-02-02,"Another string"
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13,2020-03-03,"One more string"
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14,2020-01-02,"String for first partition"
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EOF
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${CLICKHOUSE_LOCAL} --query "SELECT * FROM local.test WHERE id BETWEEN 10 AND 19 ORDER BY id;" -- --path="${WORKING_FOLDER_01528}"
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#################
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echo "Option 3. Prepare parts from from table with Engine=File defined via command line, read from stdin (pipe)"
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cat <<EOF | ${CLICKHOUSE_LOCAL} --query "INSERT INTO local.test SELECT * FROM table;" -S "id UInt64, d Date, s String" --input-format=CSV -- --path="${WORKING_FOLDER_01528}"
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21,2020-01-01,"String"
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22,2020-02-02,"Another string"
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23,2020-03-03,"One more string"
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24,2020-01-02,"String for first partition"
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EOF
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${CLICKHOUSE_LOCAL} --query "SELECT * FROM local.test WHERE id BETWEEN 20 AND 29 ORDER BY id;" -- --path="${WORKING_FOLDER_01528}"
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#################
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echo "Possibility to run optimize on prepared parts before sending parts to server"
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${CLICKHOUSE_LOCAL} --query "OPTIMIZE TABLE local.test FINAL;" -- --path="${WORKING_FOLDER_01528}"
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# ensure we have one part per partition
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${CLICKHOUSE_LOCAL} --query "SELECT toYYYYMM(d) m, uniqExact(_part) FROM local.test GROUP BY m ORDER BY m" -- --path="${WORKING_FOLDER_01528}"
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# cleanup
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rm -rf "${WORKING_FOLDER_01528}"
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