Minor correction, TX is transaction, not table exclusive". It's possible for a select statement to take a TX lock if it's a distributed query, i.e., references a remote object via a database link. Hope that helps, -Mark -- Mark J. Bobak Senior Oracle Architect ProQuest Information & Learning "There are 10 types of people in the world: Those who understand binary, and those who don't." -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Wolfson Larry - lwolfs Sent: Thursday, January 26, 2006 4:23 PM Cc: oracle-l@xxxxxxxxxxxxx Subject: seen a Select (just a select no select for update) take out a Table Exclusive lock (TX) From one of the other DBAs here: "Have any of you ever seen a Select (just a select no select for update) take out a Table Exclusive lock (TX) ? we had one in SAP this morning on ZPICK01 and the developers assure me that the transaction doesn't try to update the table. The only thing I can think of, is that ZPICK01 is huge and that Oracle tried to ensure some form of Read Consistency by making the table TX. That said I'm still not certain that some switch in the transaction isn't set to lock the table. Thoughts ?" Gee, I haven't worked much on SAP lately, but I believe tables prefixed Y and Z are custom tables, although I don't see why that would make a difference. Thanks Larry ************************************************************************ * The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please resend this communication to the sender and delete the original message or any copy of it from your computer system. Thank you. ************************************************************************ * -- //www.freelists.org/webpage/oracle-l
BEGIN:VCARD VERSION:2.1 N:Bobak;Mark FN:Bobak, Mark ORG:ProQuest Information and Learning;Database Group TITLE:Software Architect, Sr-TPD TEL;WORK;VOICE:734.975.6086 ADR;WORK:;ECC4-N01E04;1400 Eisenhower Parkway LABEL;WORK;ENCODING=QUOTED-PRINTABLE:ECC4-N01E04=0D=0A1400 Eisenhower Parkway EMAIL;PREF;INTERNET:Mark.Bobak@xxxxxxxxxxxxxxx REV:20051213T223654Z END:VCARD