Links
• Home
• Oracle DBA Forum
Frequent Oracle Errors
•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
I was told there would be no (date) math

I was told there would be no (date) math

2006-04-13       - By Igor Neyman

Reply:     1     2     3     4     5     6     7     8     9     10     >>  

Could it be because "TRUNC(SYSDATE) - TRUNC(SYSDATE)" returns a NUMBER
type?
So, "TRUNC(SYSDATE) - (TRUNC(SYSDATE)" returns a NUMBER, and then you
subtract "TRUNC(SYSDATE)" which is DATE type.  Obviously, this is not
allowed.

In the case with parenthesis:
"(TRUNC(SYSDATE) - TRUNC(SYSDATE))" returns a NUMBER, and then you
subtract it from "TRUNC(SYSDATE)" (which is DATE.  And that is allowed
in "date arithmetic".

In other words you do:
DATE - NUMBER

but not:
NUMBER - DATE

Igor

-- --Original Message-- --
From: oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] On Behalf Of Jesse, Rich
Sent: Thursday, April 13, 2006 9:52 AM
To: oracle-l@(protected)
Subject: I was told there would be no (date) math

Hey all,

While debugging an analytical function issue using 9.2.0.5, I run this
idiotic query:

SELECT TRUNC(SYSDATE) - TRUNC(SYSDATE) - TRUNC(SYSDATE) FROM DUAL;

And it errors out with:

ORA-00932 (See ORA-00932.ora-code.com): inconsistent datatypes: expected DATE got DATE

(In 10.2, the verbage is modified to "expected JULIAN DATE got DATE")

Add parenthesis and it works:

SELECT TRUNC(SYSDATE) - (TRUNC(SYSDATE) - TRUNC(SYSDATE)) FROM DUAL;

I've been looking through the docs and Metalink, but I'm unable to
answer "Why?".  Anyone?

TIA!
Rich
--
http://www.freelists.org/webpage/oracle-l



--
http://www.freelists.org/webpage/oracle-l