CREATE OR REPLACE FUNCTION "Test"(character varying[],character varying[])
RETURNS refcursor AS
$BODY$
DECLARE
curr refcursor;
filter text;
counter integer;
BEGIN
counter = 1;
filter = '';
IF array_length($1,1) > 0 THEN
filter = 'AND ';
WHILE ($1[counter] <> '') LOOP
filter = filter||'LOWER('||$1[counter]||'::character varying) LIKE ''%''||LOWER($2['||counter||'])||''%'' AND ';
counter = counter + 1;
END LOOP;
filter = substring(filter FROM 1 FOR (char_length(filter)-4));
OPEN curr FOR
EXECUTE 'SELECT "Reservation".* FROM "Reservation" WHERE "Reservation"."id" > 0 '||filter;
return curr;
END IF;
END
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
SELECT "Test"(ARRAY['"Reservation"."status"'],'{"waiting"}');
FETCH ALL IN "<unnamed portal 1>";
I tried to print out the query:
"SELECT "Reservation".* FROM "Reservation" WHERE "Reservation"."id" > 0 AND LOWER("Reservation"."status"::character varying) LIKE '%'||LOWER($2[1])||'%' "
But when it's executed it said that there was no parameter $2. So I realize that it can't access that stored procedure's parameter.
I don't have to worry about the first parameter of sql injection since it's hard coded. But the second param has to be passed into the execution. How do I do that?
I've found out that I could pass the parameter into EXECUTE using the "USING" statement.
Here's the final working code:
CREATE OR REPLACE FUNCTION "Test"(character varying[],character varying[])
RETURNS refcursor AS
$BODY$
DECLARE
curr refcursor;
filter text;
counter integer;
BEGIN
counter = 1;
filter = '';
IF array_length($1,1) > 0 THEN
filter = 'AND ';
WHILE ($1[counter] <> '') LOOP
filter = filter||'LOWER('||$1[counter]||'::character varying) LIKE ''%''||LOWER($1['||counter||'])||''%'' AND ';
counter = counter + 1;
END LOOP;
filter = substring(filter FROM 1 FOR (char_length(filter)-4));
OPEN curr FOR
EXECUTE 'SELECT "Reservation".* FROM "Reservation" WHERE "Reservation"."id" > 0 '||filter USING $2;
return curr;
END IF;
END
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
SELECT "Test"(ARRAY['"Reservation"."status"'],ARRAY['no-show']);
FETCH ALL IN "<unnamed portal 1>";
Note that I have $1 as the value in the EXECUTE statement, because it accepts $2 as its first parameter.
Related
How can we replace the plsql code with count to postgresql
FOR I IN 1..variable.count
Loop
Cr:= varray (i)
End loop;
Replacement for count in postgresql
This can be executed like a normal query :
$$ declares a string works same as '' ,example: SELECT $$string$$; or SELECT $string$ 'text' $string$;
DO indicate the next string will be executed.
DO
$$
DECLARE
rRecord RECORD;
tText TEXT ;
BEGIN
FOR rRecord IN SELECT COUNT(*) FROM generate_series(1 , 10 , 1 )
LOOP
tText := rRecord.count;
RAISE NOTICE 'Notice %',tText ;
END LOOP ;
END;
$$
LANGUAGE plpgsql ;
Data is not showing when I tried to fetch data from cursor. dbo.show_cities_multiple2 is procedure which returns two cursors.
DO $$
<<first_block>>
DECLARE
counter refcursor := 0;
ca_cur refcursor:=null;
tx_cur refcursor:=null;
BEGIN
call dbo.show_cities_multiple2(ca_cur, tx_cur);
EXECUTE 'FETCH ALL from "' || tx_cur || '"';
RAISE NOTICE 'The current value of counter is %', ca_cur;
END first_block $$;
Your problem here is that you aren't actually doing anything with the results of your EXECUTE FETCH ... EXECUTE merely runs the statement that comes after it. A plpgsql function does not return anything unless you explicitly specify RETURN ...,RETURN NEXT ... or RETURN QUERY .... Furthermore, an anonymous DO $$ block cannot return any results. So if you want to actually retrieve rows from the cursor, you need to name your cursors and execute your fetch outside of the do block:
DO $$
<<first_block>>
DECLARE
counter integer := 0;
ca_cur refcursor:='ca_cur'; --name your cursors first, otherwise they will be anonymous!
tx_cur refcursor:='tx_cur';
BEGIN
call dbo.show_cities_multiple2(ca_cur, tx_cur);
...
END first_block $$;
--Fetch
FETCH ALL FROM tx_cur;
Alternatively, you can define a standard function and use RETURN NEXT OR RETURN QUERY to return the result sets from the cursors:
CREATE FUNCTION return_city_data() RETURNS SETOF cities AS $$
DECLARE
counter integer = 0;
tx_cur refcursor = 'tx_cur';
ca_cur refcursor = 'ca_cur';
rec RECORD;
BEGIN
CALL dbo.show_cities_multiple(tx_cur,ca_cur);
-- Iterate over each record in the cursor
FOR rec in EXECUTE 'FETCH ALL FROM ' || tx_cur LOOP
counter = counter + 1;
-- RETURN NEXT means "Append each value to the function's result set".
RETURN NEXT rec;
END LOOP;
FOR rec in EXECUTE 'FETCH ALL FROM ' || ca_cur LOOP
counter = counter + 1;
RETURN NEXT rec;
END LOOP;
--All records have been appended to the result set. the cursors can now be closed.
CLOSE tx_cur;
CLOSE ca_cur;
RAISE NOTICE 'The current value of counter is %', "counter";
END
$$ LANGUAGE plpgsql;
OR
CREATE FUNCTION return_city_data() RETURNS SETOF cities AS $$
DECLARE
counter integer = 0;
tx_cur refcursor = 'tx_cur';
ca_cur refcursor = 'ca_cur';
rec RECORD;
BEGIN
CALL dbo.show_cities_multiple(tx_cur,ca_cur);
-- RETURN QUERY means "append all rows from the query to the function's result set"
RETURN QUERY EXECUTE 'FETCH ALL FROM ' || tx_cur;
RETURN QUERY EXECUTE 'FETCH ALL FROM ' || ca_cur;
CLOSE tx_cur;
CLOSE ca_cur;
END
$$ LANGUAGE plpgsql;
You can use either of these forms with a simple SELECT statement:
SELECT * FROM return_city_data();
Note that unlike RETURN, RETURN NEXT and RETURN QUERY do not terminate your function and you can use them multiple times in your blocks. The function will then naturally terminate at the end of the last block.
I am trying to modify an existing sessions procedure to add cycle count.The error I am getting is
SQL Error [42601]: ERROR: syntax error at or near "END"
Position: 3587
--call transactions_packs.tep_session()
CREATE OR REPLACE PROCEDURE transactions_packs.tep_session()
LANGUAGE plpgsql
AS $procedure$
DECLARE
session "transactions_packs"."simple_sessions";
"session_toSearch" TEXT;
"end_timestamp" TIMESTAMP WITH TIME ZONE;
"energy" NUMERIC;
"charge" NUMERIC;
"duration" NUMERIC;
"cycle_count" numeric;
"f" record ;
BEGIN
cycle_count = '0';
-- go to statement fore session reset
FOR session IN SELECT * FROM "transactions_packs"."simple_sessions" WHERE "sessionDuration" IS NULL
LOOP
BEGIN
IF session."sessionType" = 0 THEN
"session_toSearch" := 'Charging';
ELSIF session."sessionType" = 1 THEN
"session_toSearch" := 'Discharging';
END IF;
-- Session_count:Start
EXECUTE FORMAT('
FOR f IN select (current' || '%s' || '), "timestamp"
FROM "transactions_packs"."basic_measurements_packs" a order by a."timestamp" desc
LOOP
BEGIN
IF AVG((current' || '%s' || '))
OVER (ORDER BY "f"."timestamp" ROWS BETWEEN 3 PRECEDING AND CURRENT ROW) > 0.01
then cycle_count = cycle_count + 1;
END IF;
END
END LOOP;',"session_toSearch","session_toSearch")
-- get value from If and else statement to fetch records from charging and discharging col
--Session_count :End
END ;
END LOOP;
end;
$procedure$
;
where -
schema is transactions_packs
tables are -
simple_sessions
basic_measurements_packs
Please let me know if there is any part of query is which cannot be understood.
The variable "hell" sounds like useless here, try something like this :
create or replace procedure "public"."extract"(arg json)
language plpgsql as $$
begin
raise notice 'test:%', arg->'global'->>'packetType';
raise notice 'test1:%', arg-> 'transactional'->>'A';
-- freeze the input
end ;
$$;
I'm trying to query a table with a lot of columns like debMonth1, debMonth2 etc. to get a result that fits the needs for the application that needs to process the data.
Syntactically the query seems to be OK now, but I don't get a result from it. It just proceeds with no error.
I think I got problems regarding the column names? Can anybody help me out?
DO $do$
DECLARE cmonth TEXT;
DECLARE dmonth TEXT;
BEGIN
FOR i IN 1..15 LOOP
cmonth = CONCAT('"credMonth' , i::text, '"');
dmonth = CONCAT('"debMonth' , i::text, '"');
EXECUTE
format('SELECT
"account", "FY", "setOfBooks", $1, $2, $3 AS "fiscalMonth"
FROM
"transaction_figures"
WHERE
"dataType" = ''(80)'' AND
($1 != ''0.00'' OR $2 != ''0.00'')')
USING cmonth, dmonth, i;
END LOOP;
END
$do$ LANGUAGE plpgsql;
Queries executed in plpgsql don't result in printing its output nor sending to client. You have to iterate over the results and do something with it, for example:
DO $do$
DECLARE cmonth TEXT;
DECLARE dmonth TEXT;
DECLARE r RECORD;
BEGIN
FOR i IN 1..15 LOOP
cmonth = CONCAT('"credMonth' , i::text, '"');
dmonth = CONCAT('"debMonth' , i::text, '"');
FOR r in
EXECUTE
format('SELECT
"account", "FY", "setOfBooks", $1, $2, $3 AS "fiscalMonth"
FROM
"transaction_figures"
WHERE
"dataType" = ''(80)'' AND
($1 != ''0.00'' OR $2 != ''0.00'')')
USING cmonth, dmonth, i
LOOP
RAISE NOTICE '%', r;
END LOOP;
END LOOP;
END
$do$ LANGUAGE plpgsql;
This will print results in psql. If you would like to have data behaving like table (i.e. sent to client) you have to wrap your code in plpgsql function and return query result.
I'm trying to run a DELETE and UPDATE query inside a trigger function in PL/pgSQL.
CREATE OR REPLACE FUNCTION trg_delete_order_layer()
RETURNS trigger AS
$BODY$
DECLARE index_ INTEGER;
DECLARE a RECORD;
BEGIN
IF EXISTS (SELECT * FROM map_layers_order WHERE id_map = OLD.id_map)
THEN index_ := position FROM map_layers_order WHERE id_map = OLD.id_map AND id_layer = OLD.id_layer AND layer_type = 'layer';
ELSE index_ := 0;
END IF;
RAISE NOTICE 'max_index % % %', index_, OLD.id_map, OLD.id_layer;
EXECUTE 'DELETE FROM map_layers_order WHERE id_map = $1 AND id_layer = $2 AND layer_type = $3' USING OLD.id_map, OLD.id_layer, 'layer';
EXECUTE 'UPDATE map_layers_order SET position = position -1 WHERE id_map = $1 AND position > $2' USING OLD.id_map, index_;
VALUES (OLD.id_map, OLD.id_layer, 'layer', index_);
RETURN OLD;
END;
$BODY$
LANGUAGE plpgsql;
I don't know why i'm getting this error in the line where it runs the DELETE query:
Query has no destination for result data
Why is this error happen and how can I solve this?
Obviously if I use EXECUTE...INTO, I get a more reasonable error saying that the query has no result.