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TNS:could not resolve the connect identifier specified
Backtrace message unwound by exceptions
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invalid number
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resource busy and acquire with NOWAIT specified
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ORACLE initialization or shutdown in progress
archiver error. Connect internal only, until freed
snapshot too old
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Credential retrieval failed
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invalid username/password; logon denied
unable to create INITIAL extent for segment
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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

Does a lock on a parent table locks up alter table disable constraint?

genegurevich

2006-05-19

Replies:
Hi all:

I am encountering a following situation:

- one developer is executing alter table T1 disable foreing key FK1. The
FK1 is referrting to a table T2 as a parent table


- another developer is holding a lock on the T2


The first developer's command is stuck until the second one releases the
lock. I have seen it several times today
Why does this happen? I would understand that an ENABLE command would be
affected by that, but why would
a DISABLE command be affected?

thank you

Gene Gurevich


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