feat: abstracción DB multi-engine — CRUD genérico y openers para SQLite, Postgres, ClickHouse, DuckDB
Funciones Go con interfaz unificada para operaciones DB: open, close, create_table, exec, query, insert_row, insert_batch. Openers específicos por engine. Tipo DBConfig para configuración común. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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package infra
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import (
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"database/sql"
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"fmt"
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)
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// DBClose closes the database connection. Wraps db.Close() for composability
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// in pipelines that manage *sql.DB lifecycle explicitly.
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func DBClose(db *sql.DB) error {
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if db == nil {
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return fmt.Errorf("db_close: db is nil")
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}
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if err := db.Close(); err != nil {
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return fmt.Errorf("db_close: %w", err)
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}
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return nil
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}
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