是否有可能以编程方式将SQLite数据库转换为C/C++中的SQL语句？

Question

我知道SQLite命令行工具中存在.dump函数,Python有一个模拟.dump函数的iterdump命令.

是否有标准API调用或C/C++包装器以编程方式提供.dump功能？

Answer 1

Api似乎没有任何转储功能(http://www.sqlite.org/capi3ref.html),但您可以通过以下方式构建转储:

• 创建将使用您的缓存结果的新功能sqlite3_exec()或者sqlite3_get_table()和它转储到FILE*

• 使用Sqlite源代码中提供的转储功能,可以在(shell.c)中找到它.

编辑:添加此示例

/* TODO : This is just a sample code, modify it to meet your need */
void select_and_dump_sqlite3_table(sqlite3 *dbh)
{
    FILE    *dump_file;
    int i;
    sqlite3_stmt *stmt;

    dump_file = fopen(path_to_dump_file, "w");
    if (dump_file == NULL) {
        /* Error handling with errno and exit */
    }

    sqlite3_prepare_v2(dbh, "SELECT name, address, phone FROM Person",
                       0, &stmt, NULL);
    /* dump columns names into the file */
    for (i = 0; i < 3; i++) {
        fprintf (dump_file, "%30s | ", sqlite3_column_name(stmt, i));
    }
    printf ("\n");

    /* Dump columns data into the file */
    while (SQLITE_ROW == sqlite3_step(stmt)) {
        for (i = 0; i < 3; i++) {
          fprintf (dump_file, "%30s | ", sqlite3_column_text (stmt, i));
        }
      printf ("\n");
    }
    /* We're ready to leave */
    sqlite3_finalize (stmt);
}