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DELIMITER //
DROP FUNCTION IF EXISTS diakNaploSorszam //
CREATE function diakNaploSorszam ( thisDiakId INT, thisTanev INT, thisOsztalyId INT ) returns INT
READS SQL DATA
BEGIN
DECLARE inKezdesDt,inZarasDt DATE;
DECLARE a,i INT; -- for loop
DECLARE b DATE; -- for loop
DECLARE c DATE;
DECLARE d INT;
DECLARE e VARCHAR(255);
DECLARE cur1
CURSOR FOR
SELECT diakId,IF(beDt<inKezdesDt,inKezdesDt,beDt) AS tolDt,IF(ifnull(kiDt,inZarasDt)<inZarasDt,kiDt,inZarasDt) AS igDt,
(SELECT COUNT(*) FROM diakJogviszony AS ds
WHERE ds.diakId=diak.diakId AND tolDt<dt AND dt<=igDt AND ds.statusz IN ('jogviszonyban van','magántanuló','egyéni munkarend')
) AS aktJogviszonyDb,
(SELECT statusz FROM diakJogviszony AS ds
WHERE ds.diakId=diak.diakId AND dt<=tolDt ORDER BY dt DESC LIMIT 1
) AS elozoStatusz
FROM osztalyDiak LEFT JOIN diak USING (diakId)
WHERE osztalyId=thisOsztalyId AND beDt<=inZarasDt AND (kiDt IS NULL OR kiDt>=inKezdesDt)
HAVING (aktJogviszonyDb>0 or elozoStatusz in ('magántanuló','jogviszonyban van','egyéni munkarend'))
ORDER BY tolDt, CONCAT_WS(' ',viseltCsaladinev,viseltUtonev) COLLATE utf8_hungarian_ci;
DECLARE EXIT HANDLER FOR NOT FOUND RETURN NULL;
SELECT kezdesDt FROM szemeszter WHERE tanev=thisTanev AND szemeszter=1 INTO inKezdesDt;
SELECT MAX(zarasDt) FROM szemeszter WHERE tanev=thisTanev INTO inZarasDt;
SET i := 1;
OPEN cur1;
lo: LOOP
-- FETCH cur1 INTO a,b;
FETCH cur1 INTO a,b,c,d,e;
IF a = thisDiakId THEN
LEAVE lo;
END IF;
SET i := i+1;
END LOOP;
CLOSE cur1;
return i;
END; //
DELIMITER ; //
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