Hello, Laurenz
I'm sorry for replying you so late..
Thank you for your advice below.
Finally we decide to port it as a shell using the copy command.
Actually, now I'm confused with another problem, that is:
Oracle: for update wait 10
PostgreSQL: no support for the parameter "wait"
What should I do when I'm doing porting on this point?
If I get rid of the parameter "wait", there would be a dead lock in my program...
Is there any support like "for update wait N" in PostgreSQL?
I’m waiting for your reply.
Thank you so much any way.
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Following is my porting method, although it avoid the dead-lock problem, but it affect the functionality.
SELECT DOMAIN_ID, DOMAIN_NAME...FOR UPDATE WAIT 10 ORDER BY …
->
SELECT DOMAIN_ID, DOMAIN_NAME...ORDER BY … FOR UPDATE
return (List) queryBean.getQueryRun().query(queryBean.getConn(), strSql, new String[]{domain_nm,server_flag}, srHandler);
->
Connection conn = queryBean.getConn();
QueryRunner queryRunner = queryBean.getQueryRun();
queryRunner.update(conn, "set statement_timeout = 10000");
return (List) queryRunner.query(conn, strSql, new String[]{domain_nm,server_flag}, srHandler);
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Following is the exception when run my program…
11/12/06 15:18:17 ***: APL: INFO : …
….***SqlException: ERROR: canceling statement due to statement timeout Query: SELECT… ORDER BY … FOR UPDATE Parameters: [yun_SF_18, 0]
…
…
11/12/06 15:18:17 ***: APL: ERROR: [ID:flj777] … : !! Exception [class ….***SqlException
…
…
]
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Best Regards!
-----Original Message-----
From: Albe Laurenz [mailto:laurenz.albe@wien.gv.at]
Sent: Monday, October 10, 2011 10:26 PM
To: Albe Laurenz; fanlijing *EXTERN*; pgsql-admin@postgresql.org;
pgsql-general@postgresql.org
Subject: RE: [GENERAL] how to save a bytea value into a file?
I wrote:
[fanlijing wants to write bytea to file]
> A simple
> COPY (SELECT byteacol WROM mytab WHERE ...) TO 'filename' (FORMAT
binary)
> should do the trick.
Corrections:
a) "binary" must be surrounded by single quotes.
b) that won't dump just the binary data - you would have
to remove the first 25 bytes and the last 2 bytes...
So maybe using the functions I mentioned would be the
best way after all.
You could also write your own user defined function in C.
Yours,
Laurenz Albe
