Hi,
I have a question... How PG parser select (build-in) function?
Check parser function's arguments datetypes only or check returns value
datetype too (for function searching in system cache ..etc)?
I have function to_number(text, text) this function returns numeric
datetype. Is possible (effective) write this function for more
datatypes than for numeric? The function is always "to_number(text, text)",
possible difference is in a returned datetype.
(The function extract number from formated string and this number
return, but how datetype we want return?)
Karel
PS. Sorry if my problem description is a litle mazy..
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Karel Zak <zakkr@zf.jcu.cz> http://home.zf.jcu.cz/~zakkr/
Docs: http://docs.linux.cz (big docs archive)
Kim Project: http://home.zf.jcu.cz/~zakkr/kim/ (process manager)
FTP: ftp://ftp2.zf.jcu.cz/users/zakkr/ (C/ncurses/PgSQL)
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