ljb wrote:
webid@xxxxxxxxxx wrote:
Currently using Postgresql 7.2.4-5.80 with php 4.2.2.-8.0.8 on a redhat
8.0 system.
I am writing some php scripts where I want to generate a list of the
column names in a particular table that the user selects. I could take
the brute force method and hard code the column names but then every
time I add a new table or modify an existing one I would have to modify
the code. What I want is to have a generic function that given the
table name it will pull the column names for my use.
I need to get the table column names for several tables I have setup. I
know if I do a select * from tablename I can then use the pg_fieldname
function to pull the column names for all columns.
But I don't think I want to select the entire contents of the table
every time I want to get the names of the columns. I know this will
work but I think performance will be very poor.
...
You almost got it - just do "select * from tablename where 0=1", which returns
no rows but will give you the fieldnames. A portable and (I think)
efficient way to get table column names.
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even more efficient (possibly not quite as portable but does work with
pgsql and mysql)
select * from tablename limit 0
