I also have one in Perl that I use to dump an entire schema to flat files, generating sqlldr parameter and control files as is goes.
sqlunldr.pl is part of the PDBA toolkit: http://www.oreilly.com/catalog/oracleperl - click on 'Toolkit' Jared On Sat, 2004-01-10 at 19:39, Rachel Carmichael wrote: > Jared has a utility to dump tables to flat files.... > > http://www.cybcon.com/~jkstill/util/ > > on the lefthand menu, under Utilities.... click on Dump Tables to Flat > Files > > > --- Guang Mei <[EMAIL PROTECTED]> wrote: > > Hi: > > > > I have a program (running on oracle 8173 server) that writes 48 > > Millions > > lines of data into various text files . The selected data is from > > various > > tables and I have the query pretty much optimized. Now I am trying to > > find > > the fastest way to dump the selected data into a text file on the > > same > > oracle server. The program (written as a pl/sql package) now works > > something like this: > > > > str varchar2(32767) := ''; > > NL char(1) := chr(10); -- new line character > > begin > > fpn := utl_file.fopen(directory, filename, 'w', 32767); > > for x in cur1 loop > > str := str || x.str || NL; -- keep building the str > > if (length (str) > 31000 ) then > > str := substr (str,1, length(str) -1 ); > > utl_file.put_line(fpn, str); > > str := ''; > > end if; > > end loop; > > > > -- dump the last part: > > str := substr (str,1, length(str) -1 ); > > utl_file.put_line(fpn, str); > > utl_file.fflush(fpn); > > utl_file.fclose(fpn); > > end ; > > > > > > The above code works perfect fine now. But I am wondering if there is > > another way that could increase the writing siginificantly faster. > > This > > porgram does not have to be in pl/sql. I can think of a couple of > > potential approaches: > > > > 1. Write a perl program, basically using perl's DBI/DBD to select the > > data > > from the database, then calling perl's "print" to write data into a > > file. > > I have not tested this and don't know if it is faster that > > utl_file.put_line. > > > > 2. Write a C program, using ProC to talk to DB, then use C's fopen > > and > > fwrite(?) to dump data into text file. > > > > 3. Write a C program,using OCI to talk to DB, then use C's fopen and > > fwrite(?) to dump data into text file. > > > > I don't have direct experience with ProC and OCI, so I don't know how > > faster (or any) it would be by doing Option 2 or 3 above. Does > > anyone > > know if I would see siginificant performance boost by using C? Any > > other > > suggestions? > > > > TIA. > > > > Guang > > > > > > > > -- > > Please see the official ORACLE-L FAQ: http://www.orafaq.net > > -- > > Author: Guang Mei > > INET: [EMAIL PROTECTED] > > > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > > San Diego, California -- Mailing list and web hosting services > > --------------------------------------------------------------------- > > To REMOVE yourself from this mailing list, send an E-Mail message > > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > > the message BODY, include a line containing: UNSUB ORACLE-L > > (or the name of mailing list you want to be removed from). You may > > also send the HELP command for other information (like subscribing). > > > __________________________________ > Do you Yahoo!? > Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes > http://hotjobs.sweepstakes.yahoo.com/signingbonus > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Rachel Carmichael > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jared Still INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
