Instant Client/ODBC 10.2.0.4 doesn't use PK

Question

Hi,
i got the problem in our application (VB6, JET-Engine, ODBC - old school access) simple statements doesn't uses primary keys (constraints). Instead it does a "Full Table Scan" and i don't know why.
More Infos:
It's a simple table called e.g. DOCUMENT, it's has a few rows, the important one ist DOC_RECID which was created like this...
CREATE TABLE DOCUMENT (
DOC_RECID number NOT NULL,
PRIMARY KEY (DOC_RECID));
The Access is via DYNASET, the statement like this "select * from document where doc_recid = 123"
Tested with Instant Client/ODBC 10.2.0.2, 10.2.0.4 and DataDirects Wired Driver
Edited by: user11230853 on 04.06.2009 07:35

Answer 1

Hi, thanks for answering...
- I don't know if it's not the instant client (i read there's a bug 4608183 in IC < 10.2.0.2, but that's just with double and float)
And it's doesn't make a "Fullt table scan" when i don't use the application (same statement)
Quote:
Note.257828.1 Ext/Pub Full Table Scan While Quering DATE Columns Using Oracle ODBC Driver:
Note.403198.1 Ext/Pub Full Index Scan in Execution Plan With Access and Double or Float as Primary Key:
Note.373129.1 Ext/Pub Slow Performance Exhibited by Oracle ODBC Against 10.2 Oracle Database:
- Yes it is the statement
- Yes there i updates the statistics myself, and ich also dropped the other indizies and created them again.
- There are 275.000 rows in the table and 58 columns (varchar2, number, datetime, 2 CLOBs and 1 BLOB)
Edited by: user11230853 on 04.06.2009 23:42