Re: copy from csv, variable filename within a function - Mailing list pgsql-sql

I have fixed it with dollar-quoting.

-------- Original-Nachricht --------

Betreff:	[SQL] copy from csv, variable filename within a function
Datum:	Thu, 18 Apr 2013 09:26:09 +0200
Von:	basti <black.fledermaus@arcor.de>
An:	pgsql-sql@postgresql.org

Hello,
i have try the following:

-- Function: wetter.copy_ignore_duplicate(character varying) 
-- DROP FUNCTION wetter.copy_ignore_duplicate(character varying); 
CREATE OR REPLACE FUNCTION wetter.copy_ignore_duplicate(_filename
character varying)  RETURNS void AS
$BODY$
declare sql text; 
BEGIN
CREATE TEMP TABLE tmp_raw_data
(  "timestamp" timestamp without time zone NOT NULL,  temp_in double precision NOT NULL,  pressure double precision NOT NULL,  temp_out double precision NOT NULL,  humidity double precision NOT NULL,  wdir integer NOT NULL,  wspeed double precision NOT NULL,  CONSTRAINT tmp_raw_data_pkey PRIMARY KEY ("timestamp")
)
ON COMMIT DROP;  
--copy tmp_raw_data(
--           "timestamp", temp_in, pressure, temp_out, humidity, wdir,
wspeed) 
--FROM '/home/wetter/csv/data/raw/2013/2013-04/2013-04-16.txt'
--WITH DELIMITER ','; 
sql := 'COPY  tmp_raw_data(
--            "timestamp", temp_in, pressure, temp_out, humidity, wdir,
wspeed) FROM ' || quote_literal(_filename) || 'WITH DELEMITER ',' ';
execute sql; 
-- prevent any other updates while we are merging input (omit this if
you don't need it)
LOCK wetter.raw_data IN SHARE ROW EXCLUSIVE MODE;
-- insert into raw_data table
INSERT INTO wetter.raw_data(            "timestamp", temp_in, pressure, temp_out, humidity, wdir,
wspeed)          SELECT "timestamp", temp_in, pressure, temp_out, humidity, wdir, wspeed   FROM tmp_raw_data   WHERE NOT EXISTS (SELECT 1 FROM wetter.raw_data                     WHERE raw_data.timestamp = tmp_raw_data.timestamp);
END;
$BODY$  LANGUAGE plpgsql VOLATILE  COST 100;
ALTER FUNCTION wetter.copy_ignore_duplicate(character varying)  OWNER TO postgres;



But when i execute it i get the this error:
(sorry i don't know how to switch the error messages to English lang)
I think this a problem with escaping the delimiter


SELECT wetter.copy_ignore_duplicate(    '/home/wetter/csv/data/raw/2013/2013-04/2013-04-16.txt'
);
#################################
#################################  
HINWEIS:  CREATE TABLE / PRIMARY KEY erstellt implizit einen Index
»tmp_raw_data_pkey« für Tabelle »tmp_raw_data«
CONTEXT:  SQL-Anweisung »CREATE TEMP TABLE tmp_raw_data ( "timestamp"
timestamp without time zone NOT NULL, temp_in double precision NOT NULL,
pressure double precision NOT NULL, temp_out double precision NOT NULL,
humidity double precision NOT NULL, wdir integer NOT NULL, wspeed double
precision NOT NULL, CONSTRAINT tmp_raw_data_pkey PRIMARY KEY
("timestamp") ) ON COMMIT DROP«
PL/pgSQL function "copy_ignore_duplicate" line 4 at SQL-Anweisung
FEHLER:  Anfrage »SELECT  'COPY  tmp_raw_data(
--            "timestamp", temp_in, pressure, temp_out, humidity, wdir,
wspeed) FROM ' || quote_literal( $1 ) || 'WITH DELEMITER ',' '« hat 2
Spalten zurückgegeben
CONTEXT:  PL/pgSQL-Funktion »copy_ignore_duplicate« Zeile 29 bei Zuweisung 
********** Fehler ********** 
FEHLER: Anfrage »SELECT  'COPY  tmp_raw_data(
--            "timestamp", temp_in, pressure, temp_out, humidity, wdir,
wspeed) FROM ' || quote_literal( $1 ) || 'WITH DELEMITER ',' '« hat 2
Spalten zurückgegeben
SQL Status:42601
Kontext:PL/pgSQL-Funktion »copy_ignore_duplicate« Zeile 29 bei Zuweisung



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