Oracle SQL with IN condition - bad performance

Question

Hi,
I have a table like this
ID COL1 COL2 COL3
I have to delete all records in a table where
COL1 in ('A','B','C','D') and COL2 in ('K','V','N') and COL3 in ('Y','T','I') which means I will have to delete all combination of records for these three columns
something like 'A','K','Y' ; 'A','K','T' etc
I did write a query like this
delete from Tablename where col1 in COL1 in ('A','B','C','D') and COL2 in ('K','V','N') and COL3 in ('Y','T','I')
while the select statement (select * from Tablename where col1 in COL1 in ('A','B','C','D') and COL2 in ('K','V','N') and COL3 in ('Y','T','I')) gives results (even though takes considerrable time....) but the delete query runs all day..
The table has about 10,000 records.

Answer 1

user5127581 wrote:
Thank you for your response, Justin - The table has no triggers or foreign Key referencesThen have you traced the session to see what it is doing?
It makes no sense that any query against a 10,000 row table should take all day unless there is some recursive SQL being executed. Triggers and foreign keys would be the most common source of that sort of recursive SQL.
You also indicate that this is in a PL/SQL block. Are you certain that it is this SQL statement that is slow? And not something else in the block?
Justin