Question

Why this returns 0 rows

SELECT GARTUSERID, USER_CODE, UNITID, RANKCODE, RANKID, FIO, LOGINNAME, 
       START_DATE, EXPIR_DATE, NOTE, POSITION, ISCHGPASSWORD, IS_EXPIRDATE,
       IS_BLOCKED, ROW_ID
  FROM ACONTROL.GARTUSERS
 WHERE LOWER(LOGINNAME)=LOWER(:LOGIN) AND ROW_ID=:MD5PSWD

and this returns 1 row (as I wanted for the first query)?

SELECT GARTUSERID, USER_CODE, UNITID, RANKCODE, RANKID, FIO, LOGINNAME,
       START_DATE, EXPIR_DATE, NOTE, POSITION, ISCHGPASSWORD, IS_EXPIRDATE,
       IS_BLOCKED, ROW_ID 
  FROM ACONTROL.GARTUSERS
 WHERE LOGINNAME=:LOGIN AND ROW_ID=:MD5PSWD

Answer 1

Could this be a data type conflict for LOGINNAME? Try using VARCHAR2, as opposed to CHAR since it pads the string with whitespace.