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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package db
import (
"context"
"database/sql"
)
// Queryable is meant to represent the union of a transaction (sql.Tx)
// and the underlying database (sql.DB), so that code issuing a single
// read-only query can be run directly on the sql.DB object without
// creating a short-lived transaction for a single SELECT query.
//
// Queryable captures only a subset of Go's SQL API for issuing reads;
// if new code needs additional methods to query a SQL DB, they should
// be added here as needed.
type Queryable interface {
Prepare(query string) (*sql.Stmt, error)
PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
Query(query string, args ...interface{}) (*sql.Rows, error)
QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
QueryRow(query string, args ...interface{}) *sql.Row
QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row
}
// Executable is similar but has write methods as well.
type Executable interface {
Queryable
Exec(query string, args ...interface{}) (sql.Result, error)
ExecContext(ctx context.Context, query string, args ...interface{}) (sql.Result, error)
}
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