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AJ ONeal
e11b228765
pgx/v5's Conn.Query is lazy — when the queried table doesn't exist,
the 42P01 error doesn't surface at Query() time, it surfaces at
rows.Err() after the iteration loop. The original code only checked
for 42P01 at the Query() site, so first-run migrations against an
empty database failed with:
reading rows: ERROR: relation "_migrations" does not exist (SQLSTATE 42P01)
Apply the typed-error check at both sites via a shared helper.
sqlmigrate
Database-agnostic SQL migration library for Go.
Backend packages
Each backend is a separate Go module to avoid pulling unnecessary drivers:
| Package | Database | Driver |
|---|---|---|
| pgmigrate | PostgreSQL | pgx/v5 |
| mymigrate | MySQL / MariaDB | go-sql-driver/mysql |
| litemigrate | SQLite | database/sql (caller imports driver) |
| msmigrate | SQL Server | go-mssqldb |
| shmigrate | Shell scripts | (uses native CLI) |
CLI
The sql-migrate CLI uses shmigrate to generate shell scripts for managing migrations without a Go dependency at runtime.