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DB_SelectNextRow

Description​

The function moves to the next row of the result set allocated with DB_ExecuteQuery.

NameDescription
DBResult:dbresultThe result of DB_ExecuteQuery.

Returns​

Returns true if result set handle is valid and the last row is not reached yet, otherwise false.

Examples​

// examples.inc

// ...

Examples_ListNames(DB:dbConnectionHandle)
{
    // Database result set
    new DBResult:db_result_set = DB_ExecuteQuery("SELECT `name` FROM `examples`");

    // If database result set is valid
    if (db_result_set)
    {
        // Allocate some memory to store results
        new result[256];

        // Do operations
        do
        {
            // Add value from "example" field to the return value variable
            DB_GetFieldStringByName(db_result_set, "name", result, sizeof result);
        }

        // While next row could be fetched
        while (DB_SelectNextRow(db_result_set));

        // Free result set
        DB_FreeResultSet(db_result_set);
    }
}
// mode.pwn

// ...

#include <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)
    {
        // Successfully created a connection to the database
        print("Successfully created a connection to database \"example.db\".");
        Examples_ListNames(gDBConnectionHandle);
    }
    else
    {
        // Failed to create a connection to the database
        print("Failed to open a connection to database \"example.db\".");
    }

    // ...

    return 1;
}

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_ExecuteQuery.