__SQL_GET_INTEGER(children_count,
"SELECT count(*) FROM co_%s_%s AS C, co_%s_%s AS P WHERE P.id=%d and P.deleted=0 and C.\"%s\"=P.\"%s\"" ,
par_area, child_class,
par_area, par_class,
par_id,
child_prop, foreign_prop)
__CREATE_JS_FROM_INTEGER(children_count)
__RETURN_INTEGER(children_count)