Adding many rows to a table.
От | Stuart Grimshaw |
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Тема | Adding many rows to a table. |
Дата | |
Msg-id | 004101bfc2a5$e6a18280$0200000a@home.stubbynet.org.uk обсуждение исходный текст |
Ответы |
Re: Adding many rows to a table.
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Список | pgsql-sql |
I was recently doing some testing into which of two methods of searching a large block of text was faster. One of the ways I came up with was to identify keywords in an article and then have a table to cross reference these keywords back to the article they appear in. article|keyword --------------- 520 |cheese 520 |bread 521 |pickle 522 |spam you get the picture. I wrote a perl program to extract these keywords, with the idea of inserting them into a database. The first way I tried was to have lots on "insert into"'s in 1 string, then execute that string. Worked OK until the string contained too many keywords and the query was too large (this was under 6.5.3) The docs suggest using "copy to" for inserting lots of data. I created a string : COPY TO keywords FROM STDIN USING DELIMITERS ','; 520,cheese 520,bread 521,pickle 522,spam \. and then executed it, and got the following error ERROR: parser: parse error at or near "520" So my question is, after all that, is that the right way to construct my string (regardless of language, Perl C/C++ etc) By the way, I've ditched this idea for now, and just use a common or garden index on the feild I want to search for the keywords. I just want to be able to actually do this, you never know when it might come in handy. ---------------------------------------Stuart Grimshaw |Schoolsnet LTD | Specialwww.schoolsnet.com | Projects | Developerstuart@stubbynet.org.uk | ---------------------------------------
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