Release Notes 1.1

What's Changed

ADBC PostgreSQL — Arpe.io ADBC FastDriver

FastBCP now supports ADBC for PostgreSQL via the -C adbc_pgsql connector, powered by the new ADBC Arrow_FEBE drivers (Arpe.io ADBC FastDriver).

Key highlights:

• Ultra-fast Parquet exports from PostgreSQL
• Native Arrow columnar format eliminates conversion overhead
• Same high-performance ADBC approach as the existing adbc_mssql connector

Usage:

fastbcp -S pg-server:5432 \
    -d MyDatabase \
    -Q "SELECT * FROM public.orders" \
    -C adbc_pgsql \
    --fileoutput "orders.parquet"

See Connection Parameters documentation for more details.

[Breaking] New Default Date Format

The default --dateformat value for CSV, JSON, and XLSX outputs has changed from yyyy-MM-dd to yyyy-MM-dd HH:mm:sszzz.

Auto-adaptive behavior: The format automatically adapts based on the column type:

• Date-only columns remain formatted as yyyy-MM-dd
• Timestamp/DateTime columns are formatted as yyyy-MM-dd HH:mm:ss even if a timezone token (zzz) is in the format string
• DateTimeOffset columns include the full timezone offset

This change also fixes date-only format handling and adds timezone support for CSV date formatting.

Migration: If your pipeline depends on the previous default (yyyy-MM-dd), explicitly set --dateformat "yyyy-MM-dd" in your command.

New Boolean Format Values

The --boolformat parameter now supports additional formats:

Format	Example output
True/False	True, False
yes/no	yes, no
y/n	y, n

These are in addition to the existing true/false, t/f, and 1/0 formats.

Example:

fastbcp -S myserver \
    -d MyDatabase \
    -Q "SELECT * FROM products" \
    --fileoutput "products.csv" \
    --boolformat "True/False"

Environment Variables Guardrails

Added internal guardrails on environment variable handling to prevent injection vectors from this channel. This is a security hardening change with no user-facing impact.