35 lines
704 B
Go
35 lines
704 B
Go
package db
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import (
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"context"
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"database/sql"
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"errors"
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"fmt"
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"github.com/go-sql-driver/mysql"
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)
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func Open(dsn string) (*sql.DB, error) {
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db, err := sql.Open("mysql", dsn)
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if err != nil {
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return nil, fmt.Errorf("open db: %w", err)
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}
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if err := db.Ping(); err != nil {
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return nil, fmt.Errorf("ping db: %w", err)
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}
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return db, nil
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}
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func Migrate(ctx context.Context, db *sql.DB) error {
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for _, stmt := range statements {
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if _, err := db.ExecContext(ctx, stmt); err != nil {
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var mysqlErr *mysql.MySQLError
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if errors.As(err, &mysqlErr) && mysqlErr.Number == 1060 {
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continue // duplicate column — already exists
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}
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return fmt.Errorf("migrate: %w", err)
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}
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}
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return nil
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}
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