Clickhouse PARQUET in the input and output format
tags: database
PARQUET Input Output Format
Support for the export and import of PARQUET format.
PARQUET and CLICKHOUSE type matching relationship
Not supported PARQUET data type: Date32, Time32, Fixed_Size_binary, JSON, UUID, ENUM.
note:
- The column name of the Clickhouse table must be the same as the column name of the PARQUet table.
- The column data type of the Clickhouse table can be different from the inserted PARQUET data type. When inserting data, Clickhouse interprets the data type according to the above table and converts the data type to the column data type of the Clickhouse table.
Data export:
Remarks: Table is just looking away
Command: Clickhouse-Client - Query = "Select * from tutorial.tsv_demo format parquet"> PARQUET_DEMO.PARQUET
Data Import:
Create a test table:
Command: create Table Parquet_Demo (srcip string, destip string, time string) Engine = tinylog;
Import command:
cat parquet_demo.parquet | clickhouse-client --query="INSERT INTO parquet_demo FORMAT Parquet"
Imported data query:
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