Import XLSX Files to ClickHouse
Fast, parallel file import using DuckDBStream
Terminal
.\FastTransfer.exe `
--sourceconnectiontype "duckdbstream" `
--sourceserver ":memory:" `
--sourceserver "your-server" `
--sourceuser "your-username" `
--sourcepassword "your-password" `
--query "SELECT * FROM read_xlsx('D:\path\to\files\*.xlsx, filename=true')" `
--targetconnectiontype "clickhousebulk" `
--targetserver "your-server" `
--targetuser "your-username" `
--targetpassword "your-password" `
--targetdatabase "your-database" `
--targetschema "your-schema" `
--targettable "your-table" `
--method "DataDriven" `
--distributekeycolumn "filename" `
--datadrivenquery "select file from glob('D:\path\to\files\*.xlsx')" `
--degree -2 `
--loadmode "Truncate" `
--mapmethod "Name"Source - Excel (XLSX)
The Excel XLSX format is ubiquitous in enterprise environments. FastTransfer can directly read Excel files without prior conversion.
Features:
- •Direct reading without Excel installed with DuckDB read_xlsx() syntax
- •Support for multiple sheets
- •Automatic header detection
- •Data type preservation
Processing - DuckDBStream with DataDriven
DuckDB is a fast and efficient in-process analytical database. FastTransfer uses DuckDBStream to read multiple file formats with exceptional performance.
Parallel Method: DataDriven (Files)
For files, FastTransfer uses the filename as distribution key to parallelize the processing of multiple files simultaneously.
- ✓Concurrent processing of multiple files
- ✓Ideal for batch imports
- ✓Automatic horizontal scaling
Destination - ClickHouse
FastTransfer uses ClickHouse's native protocol for optimized bulk insertions on this column-oriented analytics database.
Loading method:
Native Protocol Bulk Copy
Advantages:
- •Native ClickHouse protocol
- •Optimized for columnar format
- •Exceptional analytical performance
