db_get_field_assoc_float

warning

The function starts with a lowercase letter.

Description

The function gets the contents of the field as a floating point number from the specified field name.

NameDescription
DBResult:dbresultThe result to get the data from
field[]The field name to get the data from

Returns

Retrieved value as floating point number.

Example

// examples.inc
// ...
Float:Examples_CalculateSum(DB:dbConnectionHandle)
{
// Return value variable
new Float:ret;
// Database result set
new DBResult:db_result_set = db_query("SELECT `value` FROM `examples`");
// If database result set is valid
if (db_result_set)
{
// Do operations
do
{
// Add value from "example" field to the return value variable
ret += db_get_field_assoc_float(db_result_set, "value");
}
// While next row could be fetched
while (db_next_row(db_result_set));
// Free result set
db_free_result(db_result_set);
}
// Return calculated sum
return ret;
}
// 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\".");
printf("Calculated sum: %f", Examples_CalculateSum(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

warning

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

Related Functions

Replace me