How to Fix 'Sqlite3 Error: Database is Locked' in Go?

"Sqlite3 Error: Database is Locked" in Go

When working with SQLite3 databases in Go, you may encounter the error "database is locked." This error typically indicates that multiple threads are attempting to access the same database file concurrently.

To resolve this issue, it's crucial to ensure that you're properly handling database connections. Avoid creating multiple simultaneous connections to the database. Instead, establish a single connection and reuse it for all queries and operations.

Moreover, after executing a query, always remember to close the corresponding result object. This releases resources and prevents unnecessary database file handles from accumulating. Neglecting to close result objects can result in the creation of multiple database file handles, leading to the "database is locked" error.

Here's a revised code snippet that addresses the issue by deferring the closing of the result object:

func main() {
    database, tx, err := getDatabaseHandle()
    if err != nil {
        log.Fatal(err)
    }
    defer database.Close()

    rows, err := database.Query("select * from sometable where name=?", "some")
    if err != nil {
        return err
    }
    defer rows.Close()  // Defer closing the result object

    if rows.Next() {
        ...
    }

    //some insert queries
    tx.Commit()
}

By deferring the closing of the result object (defer rows.Close()), we ensure that it's properly closed even when an error occurs during the query execution. This helps prevent resource leakage and ensures proper database handling.

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