v1.5.5

Sling v1.5.5 (2026-01-26T16:09:41Z)

New Features

• DB2 Database Support - Initial support for IBM DB2 with connection templates and full test suite
• definition-only Mode - Create table/file definitions without transferring data (parquet/arrow only for files)
• _sling_synced_at Column - Enable with SLING_SYNCED_AT_COLUMN=true for timestamp tracking
• _sling_synced_op Column - Tracks operation type: I (insert), U (update), D (soft delete)
• slugify Function - Convert strings to URL-friendly slugs

Bug Fixes

• DDL primary key with WITH clauses - Fixed incorrect placement when table options present (#694)
• Prometheus streaming deadlock - Fixed stall on large time ranges (#700)
• MySQL boolean CSV streaming - Fixed boolean handling in LOAD DATA LOCAL INFILE
• delete_missing with transforms - Fixed errors in PK-only queries when transforms present
• Connection caching - Fixed hash method and ODBC initialization

Improvements

• Go 1.25 - Upgraded build toolchain
• Docker ODBC packages - Added unixodbc and odbcinst
• Oracle XMLTYPE - Support for BigQuery transfers
• MySQL LOAD DATA LOCAL - Enhanced NULL value handling
• S3 multi-bucket access - Improved support in replications
• Schema discovery - Thread-safe schemata merging, column-level support