【Oracle】建立索引

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/**   
 * 建索引
 */

DECLARE 
	AN_FLAG NUMBER;
BEGIN
	SELECT COUNT(1) INTO AN_FLAG FROM USER_IND_COLUMNS
		WHERE TABLE_NAME = 'T_ZZ_RELEASED_RECORD'
		AND COLUMN_NAME = 'RR_ID';

	IF AN_FLAG = 0 THEN
    	EXECUTE IMMEDIATE 'CREATE INDEX IDX$RR_ID ON T_ZZ_RELEASED_RECORD(RR_ID)';
    COMMIT;
  	END IF; 

END;
/