Re: How select data from know partition from a partitioned table?

Hi Wenjun,

Thank you so much for you response. I want to select based on a specific partition to make sure i have right data in my partition or for other reasons/verification.  In Oracle we do SELECT COUNT(*) FROM table PARTITION (partitionname). Is there anything similar in HANA?

In an example scenario,

CREATE COLUMN TABLE TEST_TABLE       

       (       

        A INTEGER NOT NULL,       

        B INTEGER NOT NULL,

        C VARCHAR(10) NULL,

        PRIMARY KEY (A, B)

       );

INSERT INTO TEST_TABLE(A, B, C) VALUES(1,1,'one');

INSERT INTO TEST_TABLE(A, B, C) VALUES(2,2,'1.00');

INSERT INTO TEST_TABLE(A, B, C) VALUES(3,3,'1');

Now i am trying to partition the non partitioned TEST_TABLE       

ALTER TABLE TEST_TABLE PARTITION BY RANGE (B) (PARTITION VALUE = 1, PARTITION VALUE = 2, PARTITION VALUE = 3, PARTITION OTHERS);

After partition i am doing a select in portion 3

SELECT * FROM TEST_TABLE WHERE TO_INTEGER(C) = 1 AND B = 3;

But the query fails with this response.

Could not execute 'SELECT * FROM TEST_TABLE WHERE TO_INTEGER(C) = 1 AND B = 3' in 1.053 seconds .

SAP DBTech JDBC: [339]: invalid number:  [6930] Error during optimizer search

In theory, partition 3 has only one row whose C value('1') is convertible to integer. I'm not sure why this query fails. This is the reason i want to query partition 3 and verify if i have right data.

Thanks,

Suren.