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Helper function for pgsql_exec. For running querys, use pgsql_exec() Connect if not currently connected. Run the given query.

Parameters:

	database	database name we are connected to (used for error logging)
	tablename	table name we are connected to (used for error logging)
	sql	sql query string to execute
	result	pointer for where to store the result handle

Returns:

-1 on fatal query error

-2 on query failure that resulted in disconnection

0 on success

pgsql_exec for full example