پرش به مطلب اصلی

db_field_name

هشدار

This function starts with a lowercase letter.

Description​

Returns the name of a field at a particular index.

NameDescription
DBResult:dbresultThe result to get the data from; returned by db_query.
fieldThe index of the field to get the name of.
result[]The result.
maxlengthThe max length of the field.

Returns​

Returns 1 if result set handle is valid, otherwise 0.

Examples​

static DB:gDBConnectionHandle;

public OnGameModeInit()
{
    // ...

    // Create a connection to a database
    gDBConnectionHandle = db_open("example.db");

    // If connection to the database exists
    if (gDBConnectionHandle)
    {
        // Select first entry in table "join_log"
        new DBResult:db_result_set = db_query(g_DBConnection, "SELECT * FROM `join_log` LIMIT 1");

        // If result set handle is valid
        if (db_result_set)
        {
            // Get the number of fields from result set
            new columns = db_num_fields(db_result_set);

            // Allocate some memory for storing field names
            new field_name[32];

            // Iterate through all column indices
            for (new column_index; index < column_index; index++)
            {
                // Store the name of the i indexed column name into "field_name"
                db_field_name(db_result_set, index, field_name, sizeof field_name);

                // Print "field_name"
                printf("Field name at index %d: \"%s\"", index, field_name);
            }

            // Frees the result set
            db_free_result(db_result_set);
        }
    }
    else
    {
        // Failed to create a connection to the database
        print("Failed to open a connection to database \"example.db\".");
    }
}

public OnGameModeExit()
{
    // Close the connection to the database if connection is open
    if (db_close(gDBConnectionHandle))
    {
        // Extra cleanup
        gDBConnectionHandle = DB:0;
    }

    // ...

    return 1;
}

Notes​

هشدار

Using an invalid handle other than zero will crash your server! Get a valid database connection handle by using db_query.