fileCluster

fileCluster(cluster_name, path[, format, structure, compression_method])

$ grep user_files_path /etc/clickhouse-server/config.xml
    <user_files_path>/var/lib/clickhouse/user_files/</user_files_path>

$ cat /var/lib/clickhouse/user_files/test1.csv
    1,"file1"
    11,"file11"

$ cat /var/lib/clickhouse/user_files/test2.csv
    2,"file2"
    22,"file22"

INSERT INTO TABLE FUNCTION file('file1.csv', 'CSV', 'i UInt32, s String') VALUES (1,'file1'), (11,'file11');
INSERT INTO TABLE FUNCTION file('file2.csv', 'CSV', 'i UInt32, s String') VALUES (2,'file2'), (22,'file22');

SELECT * FROM fileCluster('my_cluster', 'file{1,2}.csv', 'CSV', 'i UInt32, s String') ORDER BY i, s

┌──i─┬─s──────┐
│  1 │ file1  │
│ 11 │ file11 │
└────┴────────┘
┌──i─┬─s──────┐
│  2 │ file2  │
│ 22 │ file22 │
└────┴────────┘