Re: [HACKERS] adding new field
hey, let me clarify something. 1. Whenever you run a query, its result or some other thing gets cached. I want to flush this cache? Also let me know when this cache gets flushed automatically. 2. After adding a new field in Resdom structure and making necessary changes in outfuncs.c, createfuncs. etc files, I *sometimes* get garbage value for the field added. The field is initialiazed to zero in makefuns.c 3. **IMP*** Is there something in postgres that, only for N number of fields, of a structure, the memory is allocated, i.e., do I need to modify this N somewhere to reflect the addtion of a new field. And that *weird* thing is: 1. I run some query, didn't get results. 2. Then, I commented the part which I modified [ i.e., commented that new field in Resdom structure], again run the same query, got results. 3. Next, I uncommented that part, and ran the same query again. I GOT THE RESULTS. That's how my prog is behaving, behaving in a *weird* way. It seems like some memory probs somewhere. I can't figure it out. Yes, I'm re-compiling and running initdb whenever I make some modifications in the code.I'm using release 8.03 and due to some reasons can't shift to some other release. Regds,RanbeerOn 6/6/06, Tom Lane [EMAIL PROTECTED] wrote: Martijn van Oosterhout kleptog@svana.org writes: On Mon, Jun 05, 2006 at 11:24:09PM +0530, ranbeer makin wrote: 2. I have added a new field in RESDOM structure, made necessary modifications in outfuncs.c, copy, read, equalfuncs.c but my prog is behaving in a weird way, seems like some memory probs...What other modifications needs to be done to reflect the addition of this new field? Did you remember to recompile *everything* affected? (--enable-depend is useful for this). You also have to initdb again.Also, if you're working on a patch you hope to someday contribute, you should be starting from CVS HEAD or some reasonable approximation of it.Resdom disappeared more than a year ago:http://archives.postgresql.org/pgsql-committers/2005-04/msg00060.php regards, tom lane
Re: [HACKERS] adding new field
On Tue, Jun 06, 2006 at 09:44:04PM +0530, ranbeer makin wrote: hey, let me clarify something. 1. Whenever you run a query, its result or some other thing gets cached. I want to flush this cache? Also let me know when this cache gets flushed automatically. What cache? Query results are not cached, neither are plans. Please be specific. 2. After adding a new field in Resdom structure and making necessary changes in outfuncs.c, createfuncs. etc files, I *sometimes* get garbage value for the field added. The field is initialiazed to zero in makefuns.c Check for other places in the code that create that structure. makefunc is more convienience than anything else. 3. **IMP*** Is there something in postgres that, only for N number of fields, of a structure, the memory is allocated, i.e., do I need to modify this N somewhere to reflect the addtion of a new field. Postgres uses sizeof() always, so as long as all the files are compiled the same way, everything will work. And that *weird* thing is: 1. I run some query, didn't get results. 2. Then, I commented the part which I modified [ i.e., commented that new field in Resdom structure], again run the same query, got results. 3. Next, I uncommented that part, and ran the same query again. I GOT THE RESULTS. Did you rerun make install and restart the postmaster between each run? Have a nice day, -- Martijn van Oosterhout kleptog@svana.org http://svana.org/kleptog/ From each according to his ability. To each according to his ability to litigate. signature.asc Description: Digital signature
Re: [HACKERS] adding new field
On Mon, Jun 05, 2006 at 11:24:09PM +0530, ranbeer makin wrote: Hi, I have two questions to ask: 1. How to flush buffer in postgres? I'm not able to see the changes that I make in my code. Sometimes the output comes and sometime it's not. What might be the problem? How do you mean? What kind of buffer? If you mean when does stuff in the buffercache hit disk, well, normally they xlogged so they may not appear in the actual datafiles. However, a CHECKPOINT may do it. 2. I have added a new field in RESDOM structure, made necessary modifications in outfuncs.c, copy, read, equalfuncs.c but my prog is behaving in a weird way, seems like some memory probs...What other modifications needs to be done to reflect the addition of this new field? Did you remember to recompile *everything* affected? (--enable-depend is useful for this). You also have to initdb again. Hope this helps, -- Martijn van Oosterhout kleptog@svana.org http://svana.org/kleptog/ From each according to his ability. To each according to his ability to litigate. signature.asc Description: Digital signature
Re: [HACKERS] adding new field
On 6/5/06, ranbeer makin [EMAIL PROTECTED] wrote: 1. How to flush buffer in postgres? I'm not able to see the changes that I make in my code. I assume you mean an output buffer? If you're using fprintf, make sure to do a fflush. Otherwise, use elog(LOG or elog(DEBUG. 2. I have added a new field in RESDOM structure, made necessary modifications in outfuncs.c, copy, read, equalfuncs.c but my prog is behaving in a weird way, seems like some memory probs...What other modifications needs to be done to reflect the addition of this new field? Example of *wierd*? -- Jonah H. Harris, Software Architect | phone: 732.331.1300 EnterpriseDB Corporation| fax: 732.331.1301 33 Wood Ave S, 2nd Floor| [EMAIL PROTECTED] Iselin, New Jersey 08830| http://www.enterprisedb.com/ ---(end of broadcast)--- TIP 5: don't forget to increase your free space map settings
Re: [HACKERS] adding new field
Martijn van Oosterhout kleptog@svana.org writes: On Mon, Jun 05, 2006 at 11:24:09PM +0530, ranbeer makin wrote: 2. I have added a new field in RESDOM structure, made necessary modifications in outfuncs.c, copy, read, equalfuncs.c but my prog is behaving in a weird way, seems like some memory probs...What other modifications needs to be done to reflect the addition of this new field? Did you remember to recompile *everything* affected? (--enable-depend is useful for this). You also have to initdb again. Also, if you're working on a patch you hope to someday contribute, you should be starting from CVS HEAD or some reasonable approximation of it. Resdom disappeared more than a year ago: http://archives.postgresql.org/pgsql-committers/2005-04/msg00060.php regards, tom lane ---(end of broadcast)--- TIP 6: explain analyze is your friend
Re: [HACKERS] adding new field
Jonah H. Harris wrote: 2. I have added a new field in RESDOM structure, made necessary modifications in outfuncs.c, copy, read, equalfuncs.c but my prog is behaving in a weird way, seems like some memory probs...What other modifications needs to be done to reflect the addition of this new field? Example of *wierd*? http://www.m-w.com/ wierd: The word you've entered isn't in the dictionary. Click on a spelling suggestion below or try again using the search box to the right. Suggestions for wierd: 1. weird weird: Main Entry: 2weird Function: adjective 1 : of, relating to, or caused by witchcraft or the supernatural : MAGICAL 2 : of strange or extraordinary character : ODD, FANTASTIC (2weird, because 1weird is a noun) Tom said some time ago weird is spelled weirdly. -- Alvaro Herrerahttp://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc. ---(end of broadcast)--- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
Re: [HACKERS] adding new field
On 6/5/06, Alvaro Herrera [EMAIL PROTECTED] wrote: The word you've entered isn't in the dictionary. Thanks Alvaro... my typing sometimes gets ahead of my in-brain spellcheck. -- Jonah H. Harris, Software Architect | phone: 732.331.1300 EnterpriseDB Corporation| fax: 732.331.1301 33 Wood Ave S, 2nd Floor| [EMAIL PROTECTED] Iselin, New Jersey 08830| http://www.enterprisedb.com/ ---(end of broadcast)--- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
