hvordan man returnerer et dynamisk resultatsæt i Oracle-funktionen

Forudsat at funktionen kompilerer, prøv:

SELECT * 
  FROM TABLE(strtokenizer('a,b,c',','));

Reference:

• Returnering af rækker gennem en tabelfunktion i Oracle

Funktionen skal rettes - brug:

CREATE OR REPLACE FUNCTION StrTokenizer (string IN VARCHAR2, 
                                         delimiter IN VARCHAR2)
RETURN key_value_table AS v_ret key_value_table
BEGIN
  SELECT CAST(MULTISET(SELECT LEVEL k, 
                              SUBSTR(STRING_TO_TOKENIZE, DECODE(LEVEL, 1, 1, INSTR(STRING_TO_TOKENIZE, DELIMITER, 1, LEVEL-1)+1), 
                              INSTR(STRING_TO_TOKENIZE, DELIMITER, 1, LEVEL) - DECODE( LEVEL, 1, 1, INSTR(STRING_TO_TOKENIZE, DELIMITER, 1, LEVEL-1)+1)) v
                         FROM (SELECT string || delimiter AS STRING_TO_TOKENIZE , 
                                      delimiter AS DELIMITER
                                 FROM DUAL)
                   CONNECT BY INSTR(STRING_TO_TOKENIZE, DELIMITER, 1, LEVEL)>0 
                     ORDER BY level ASC) AS key_value_table)
    INTO v_ret
    FROM DUAL;

  RETURN v_ret;

END;