Partition in Data warehouse

Question

Hello,
I'm trying to create Interval partition in one table with Invoice_Date as key column.
Database NLS Setting for date is DD-MON-RR and we are entering date as 'DD-MON-YYYY'. Now what i want to know is when i create table like below
CREATE TABLE INTERVAL_SALES_NJ
    ( Invoice_Date       DATE
    , Invoice_details   CHAR(10)    )
  PARTITION BY RANGE ( Invoice_Date )
  INTERVAL(NUMTOYMINTERVAL(1, 'YEAR'))
    ( PARTITION p0 VALUES LESS THAN (TO_DATE('1-1-2008', 'DD-MM-YYYY')),
      PARTITION p1 VALUES LESS THAN (TO_DATE('1-1-2009', 'DD-MM-YYYY')),
      PARTITION P2 VALUES LESS THAN (TO_DATE('1-7-2009', 'DD-MM-YYYY')),
      PARTITION p3 VALUES LESS THAN (TO_DATE('1-1-2010', 'DD-MM-YYYY')) );
In Dashboard, we've prompt YEAR like(e.g. 2008,2009 etc.) with some other prompts for analysis. The YEAR I'm casting from Invoice_Date .
So my confusion will oracle use the above date partition for analysis.
Or better i create a numeric column YEAR in table (TO_CHAR(Invoice_Date,'YYYY') ) and create partition on it?
Regards!
OBIEE 11.1.1.6
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production

Answer 1

NitinJoshi wrote:
Thanks for the reply.
The create table statement above was just an example. Yes, i will go for YEAR interval.
But the thing is when i take Invoice_date in Prompt, I've to put Year(Invoice_date). Will that use partition or...?
Dear rp0428,
my queries would be normal select from Invoice Sales table but where clause would have year,organization_descr and 1 more column. year & organization_descr filter would remain for most of the analysis.
Regards!
We aren't asking for some general statement about what your query 'might be'; Oracle works with actual queries. If you want an 'actual' answer provide an 'actual' query.
Oracle can't use 'year' to query a column of type DATE unless you turn it into a date using TO_DATE.
And the Oracle server knows NOTHING about 'Prompt' or 'Year(Invoice_date)'.
Partition pruning can only occur if the partition columns are included in the WHERE clause.