From PostgreSQL to MotherDuck using Microsoft OneLake
Configure your LakeXpress data pipeline with the selected components
LakeXpress Orchestrator
- Manages end-to-end pipelines
- Orchestrates FastBCP extracts with retries & logging
- Handles incremental sync and schema-aware metadata

./LakeXpress config create \
-a data/ds_credentials.json \
--log_db_auth_id log_db_ms \
--source_db_auth_id datasource_postgresql_01 \
--source_db_name sales \
--source_schema_name "sales,dim" \
--fastbcp_dir_path ./FastBCP_linux-x64/latest/ \
--fastbcp_p 2 \
--n_jobs 4 \
--target_storage_id onelake_lake_prd \
--generate_metadata \
--sub_path /ingest/bronze \
--incremental_table "sales.orders:o_orderdate:date" \
--incremental_table "sales.lineitem:l_shipdate:date" \
--publish_method internal \
--publish_target motherduck_tgt
# First sync - full load
./LakeXpress sync
# Subsequent syncs - incremental updates (much faster!)
./LakeXpress syncSource - PostgreSQL
PostgreSQL is a powerful and robust open-source relational database. LakeXpress optimizes extractions from PostgreSQL using FastBCP's native connector for excellent performance.
Features:
- •Direct streaming read from database
- •Full support for PostgreSQL data types
- •Secure SSL connections
- •Parallel extraction to Parquet
Format - Apache Parquet
Parquet is the industry-standard columnar file format for analytics. LakeXpress uses FastBCP to extract data from source databases and convert it to Parquet format, ensuring optimal compression, query performance, and compatibility with all modern data platforms.
Advantages:
- •Columnar format optimized for analytics
- •Efficient compression (typically 3-10x)
- •Schema evolution support
- •Predicate pushdown for fast queries
- •Universal compatibility with cloud platforms
- •Preserves data types and precision
Cloud Stage - Microsoft OneLake
OneLake is Microsoft Fabric's unified data lake. LakeXpress stages data directly in OneLake, providing native integration with all Fabric workloads and eliminating data duplication.
Features:
- •Native Fabric integration
- •Single copy of data across all workloads
- •Automatic Delta Lake format
- •Built-in governance and security
- •Seamless data sharing across Fabric
Destination - MotherDuck
MotherDuck is a serverless analytics platform powered by DuckDB. LakeXpress publishes Parquet files that MotherDuck can query directly with blazing-fast performance.
Publishing method:
External Tables or DuckDB COPY
Features:
- •Serverless DuckDB in the cloud
- •Direct Parquet file queries
- •Hybrid execution (local + cloud)
- •SQL analytics without ETL
- •Cost-effective pay-per-query


