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TNS:could not resolve the connect identifier specified
Backtrace message unwound by exceptions
invalid identifier
PL/SQL compilation error
internal error
missing expression
table or view does not exist
end-of-file on communication channel
TNS:listener unknown in connect descriptor
insufficient privileges
PL/SQL: numeric or value error string
TNS:protocol adapter error
ORACLE not available
target host or object does not exist
invalid number
unable to allocate string bytes of shared memory
resource busy and acquire with NOWAIT specified
error occurred at recursive SQL level string
ORACLE initialization or shutdown in progress
archiver error. Connect internal only, until freed
snapshot too old
unable to extend temp segment by string in tablespace
Credential retrieval failed
missing or invalid option
invalid username/password; logon denied
unable to create INITIAL extent for segment
out of process memory when trying to allocate string bytes
shared memory realm does not exist
cannot insert NULL
TNS:unable to connect to destination
remote database not found ora-02019
exception encountered: core dump
inconsistent datatypes
no data found
TNS:operation timed out
PL/SQL: could not find program
existing state of packages has been discarded
maximum number of processes exceeded
error signaled in parallel query server
ORACLE instance terminated. Disconnection forced
TNS:packet writer failure
see ORA-12699
missing right parenthesis
name is already used by an existing object
cannot identify/lock data file
invalid file operation
quoted string not properly terminated

Re: Column order in indices (oracle 9.2)

Derya Oktay

2006-08-01

Replies:
Hi
Using a hint may force to use your index. It may also give an idea if it is really possible to use the provided index. Further, CBO runs on calculated statistics be sure you work on correct statistic. The last but not least is, Oracle may choose the way it use indexes according to table sizes.
Regards.
Derya.
On 8/1/06, genegurevich@discoverfinancial.com < genegurevich@discoverfinancial.com> wrote:
Hi everybody:

I remember reading that in Oracle 9.2 and higher the order of the columns
in an index does not matter.
That is oracle will be able to quickly search on a column even if it is not
a leading one. I have a table
with a primary key consisting of three columns. When a table is queried
based on the third column,
the data start coming out immediately, but when I use the second column the
query just sits there.
Is that an expected behavior? Did I misunderstood something about the
column order?

thanks for any insight

Gene Gurevich


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