Date function problem(Interval adding)

Question

Hi all,
I have a table with a column named interval(Unfortunately! )and another column named start_time.
I want to submit a select query against this table like this one:
SELECT * FROM TABLE1
WHERE (start_time + INTERVAL 'interval' minute) < systimestamp;
As you see the lowercase interval is the name of that column but It gots error:
PL/SQL: ORA-01867: the interval is invalid
What should I do?

Answer 1

SQL> desc t
Name                                                  Null?    Type
START_TIME                                                     TIMESTAMP(6)
INTERVAL                                                       NUMBER(38)
SQL> insert into t values(current_timestamp - numtodsinterval(10,'minute'), 10);
1 row created.
SQL> select * from t;
START_TIME                                                                    INTERVAL
17.08.05 18:22:10,593000                                                            10
SQL> select * from t where (start_time + numtodsinterval(t.INTERVAL,'minute')) < systimestamp;
START_TIME                                                                    INTERVAL
17.08.05 18:22:10,593000                                                            10Rgds.