I don't think you can do it.. I mean, you could change it to trunc the oracle_date field (that eliminates the minutes) and then do a to_date of :b1 but you will still be operating on the oracle_date field.
Okay, I HATE to suggest this, but since the table is small: add another field to the table oracle_date_2 as a date field. Update the table set oracle_date_2=trunc(oracle_date) add a trigger to fill in oracle_date_2 when you insert a row or update the oracle_date column create an index on oracle_date_2 and change the query to use that column --- [EMAIL PROTECTED] wrote: > > I've got the following SQL statement that is running very long on a > nightly > data load. The problem is the TO_CHAR function which is preventing > me from using the index on this small (20,000-row table). > > This is an 8.0.4 database so it is not possible for me to use > make this a function-based index. > > The problem is that the date field has minutes, etc. included and > those need to be eliminated before the comparison can be made. > That's why I can't just eliminate the TO_CHAR from both sides > of the equation. > > Isn't there a way that I can pull this function out of the select > statement > and do it in a preceeding statement? Then I could just pass in both > variables to this statement without the TO_CHAR and use my index. > > Is this realistic? How, exactly could it be done? > > > SELECT DATE_KEY > FROM DATE_DIM > WHERE TO_CHAR(ORACLE_DATE,'DD-MON-YYYY') = > TO_CHAR(:b1,'DD-MON-YYYY') > > > SQL> desc date_dim; > Name Null? Type > ------------------------------- -------- ---- > DATE_KEY NOT NULL NUMBER(5) > ORACLE_DATE NOT NULL DATE > DATACOM_DATE NUMBER(6) > DATACOM_REVERSE_DATE NUMBER(6) > DAY_OF_WEEK NOT NULL VARCHAR2(30) > DAY_NUMBER_IN_MONTH NOT NULL NUMBER(3) > DAY_NUMBER_OVERALL NOT NULL NUMBER(9) > WEEK_NUMBER_IN_YEAR NOT NULL NUMBER(3) > WEEK_NUMBER_OVERALL NOT NULL NUMBER(7) > MONTH NOT NULL VARCHAR2(30) > MONTH_NUMBER_OVERALL NOT NULL NUMBER(7) > YEAR NOT NULL NUMBER(5) > WEEKDAY_IND NOT NULL CHAR(1) > LAST_DAY_IN_MONTH_IND NOT NULL CHAR(1) > DATA_WAREHOUSE_MOD_DATETIME NOT NULL DATE > DATA_MART_MOD_DATETIME NOT NULL DATE > > > > SQL> select oracle_date from date_dim where rownum=1; > > ORACLE_DA > --------- > 01-JAN-70 > > > Thanks in advance for any help. > > Cherie Machler > Oracle DBA > Gelco Information Network > > > > > > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing > Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). __________________________________________________ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Rachel Carmichael INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
