Re: using copy from in function

2008/3/4, Yura Gal <yuragal@gmail.com>:
> I'm trying to automate import data using CORY FROM. For this purpose I
>  wrote plpgsql function. As my postgres works on windows vista I need
>  to use E'' syntax for path-to-file. This syntax works fine in SQL
>  queries like:
>  COPY table FROM E'path_to_file_with_double_backslashes';
>
>  Following query works fine too:
>  COPY table FROM $$path_to_file_with_single_backslashes$$;
>
>  However I can't figure it out how to use file_path variable as this
>  code throw error while compilation:
>
>  CREATE OR REPLACE FUNCTION func (inout _chrom varchar) RETURNS varchar AS
>  $body$
>  DECLARE
>   _chrom ALIAS FOR $1;
>   _file TEXT;
>  BEGIN
>   _file := $$c:\folder1\folder2\$$ || _chrom || '.txt';
>   RAISE NOTICE 'Filename is -> %', _file;
>   COPY table (column) FROM _file CSV HEADER;
>
>   statements;
>
>  EXCEPTION
>  WHEN bad_copy_file_format THEN
>         _chrom := 'badformat';
>  WHEN io_error THEN
>         _chrom := 'ioerr';
>  WHEN undefined_file THEN
>         _chrom := 'unfile';
>         RETURN;
>  END;
>  $body$
>  LANGUAGE 'plpgsql' ;
>
>  ERROR: syntax error in query at or near "$1" at character 35
>  QUERY:   COPY table (column) FROM $1 CSV HEADER
>  CONTEXT: SQL statement in PL/PgSQL function "func" near line 7
>
>  Is there any tricks to solve this problem? I suspect that something
>  wrong with quotation but can not find out a mistake.
>
>  PS. Postgres server version is 8.3
>
>


Try:
EXECUTE 'COPY table (column) FROM ' || _file || 'CSV HEADER;';

Osvaldo