CREATE TABLE demo(host string, cpu double, memory double, jsons JSON, ts TIMESTAMP time index); CREATE TABLE demo_2(host string, cpu double, memory double, ts TIMESTAMP time index); insert into demo(host, cpu, memory, jsons, ts) values ('host1', 66.6, 1024, '{"foo":"bar"}', 1655276557000), ('host2', 88.8, 333.3, '{"a":null,"foo":"bar"}', 1655276558000); insert into demo(host, cpu, memory, ts) values ('host3', 111.1, 444.4, 1722077263000); insert into demo_2(host, cpu, memory, ts) values ('host4', 77.7, 1111, 1655276555000), ('host5', 99.9, 444.4, 1655276556000), ('host6', 222.2, 555.5, 1722077264000); Copy demo TO '${SQLNESS_HOME}/demo/export/parquet_files/demo.parquet'; Copy demo_2 TO '${SQLNESS_HOME}/demo/export/parquet_files/demo_2.parquet'; CREATE TABLE with_filename(host string, cpu double, memory double, ts timestamp time index); Copy with_filename FROM '${SQLNESS_HOME}/demo/export/parquet_files/demo.parquet' with (start_time='2022-06-15 07:02:37', end_time='2022-06-15 07:02:39'); select * from with_filename order by ts; CREATE TABLE with_path(host string, cpu double, memory double, ts timestamp time index); Copy with_path FROM '${SQLNESS_HOME}/demo/export/parquet_files/'; select * from with_path order by ts; CREATE TABLE with_json(host string, cpu double, memory double, jsons JSON, ts timestamp time index); Copy with_json FROM '${SQLNESS_HOME}/demo/export/parquet_files/demo.parquet'; select host, cpu, memory, json_to_string(jsons), ts from with_json order by ts; -- SQLNESS PROTOCOL MYSQL select host, cpu, memory, jsons, ts from demo where host != 'host3'; -- SQLNESS PROTOCOL POSTGRES select host, cpu, memory, jsons, ts from demo where host != 'host3'; CREATE TABLE with_pattern(host string, cpu double, memory double, ts timestamp time index); Copy with_pattern FROM '${SQLNESS_HOME}/demo/export/parquet_files/' WITH (PATTERN = 'demo.*', start_time='2022-06-15 07:02:39'); select * from with_pattern order by ts; CREATE TABLE without_limit_rows(host string, cpu double, memory double, ts timestamp time index); Copy without_limit_rows FROM '${SQLNESS_HOME}/demo/export/parquet_files/'; select count(*) from without_limit_rows; CREATE TABLE with_limit_rows_segment(host string, cpu double, memory double, ts timestamp time index); Copy with_limit_rows_segment FROM '${SQLNESS_HOME}/demo/export/parquet_files/' LIMIT 3; select count(*) from with_limit_rows_segment; Copy with_limit_rows_segment FROM '${SQLNESS_HOME}/demo/export/parquet_files/' LIMIT hello; CREATE TABLE demo_with_external_column(host string, cpu double, memory double, ts timestamp time index, external_column string default 'default_value'); Copy demo_with_external_column FROM '${SQLNESS_HOME}/demo/export/parquet_files/demo.parquet'; select * from demo_with_external_column order by ts; CREATE TABLE demo_with_less_columns(host string, memory double, ts timestamp time index); Copy demo_with_less_columns FROM '${SQLNESS_HOME}/demo/export/parquet_files/demo.parquet'; select * from demo_with_less_columns order by ts; drop table demo; drop table demo_2; drop table with_filename; drop table with_json; drop table with_path; drop table with_pattern; drop table without_limit_rows; drop table with_limit_rows_segment; drop table demo_with_external_column; drop table demo_with_less_columns;