I'm trying to run a parameterized query in Presto using PREPARE, but I'm not able to run it using CTE.
i.e.,
prepare x1 from
with a1 as (
select foo from bar where foo = ?)
,b1 as (
select bar from bar where foo = 1)
select
a1.foo,
b1.bar
from
a1
left join
b1 on b1.foo = a1.foo
execute x1 using 9
I keep received error messages that say "mismatched input 'execute', expecting '*'". I'm not sure what I'm missing here.
I've tried adding ';' everywhere I can think it might help, and it changes nothing. I'm able to run the prepare statement alone without the execute, but I'm not able to find out how to run them in the same session
Related
I am new to Python and I want to execute multiple SQL queries in one statement using python, but I am not able to find the appropriate way to do so.
I wrote following code but its throwing an error as " DatabaseError: ORA-00933: SQL command not properly ended."
import cx_Oracle;
SQLQuery = "select x from xyz where p= 'sn'; select * from abs where a ='qw';"
connection = cx_Oracle.connect('username', 'password', 'server')
cursor = connection.cursor()
cursor.execute(SQLQuery) #its throwing error here
It would be great if one can suggest me the appropriate function for executing the multiple queries in one call.
Appreciate your response. Thanks in advance.
What do you want to achieve with this?
Technically you could try to get rows from two tables or try to combine rows from different tables, but all this is directly done in SQL.
Remove ; (semicolon) at the end of query and it should run fine.
I have a USQL query that runs fine on it's own against 400M records in a managed table.
But during development, I don't want to run it against all records all the time, so I pop a where clause in, run it for a tiny subsection of data, and it completes in around 2 minutes (#5 AUs), writing out results to a tsv in my data lake.
Happy with that.
However, I now want to use it as the source for a second query and further processing.
So I create a view with the original USQL (minus the where clause).
Then to test, a new script :
'Select * from MyView WHERE <my original test filter>'.
Now I was expecting that to execute in around the same time as the original raw query. But instead I got to 4 minutes, only 10% through the plan, and cancelled - something is not right.
No expert at reading Job Graphs, but ...
The original script kicks off with 2* 'Extract Combine partition' both reading a couple of hundered MBs, my select on the saved View is reading over 100GB !!
So it is not taking the where clause into account at all at this stage.
Obviously this shows how little I yet understand about how DLA works behind the scenes !
Would someone please help me understand (a) what is going on and (b) a path forward to get the behavior I need ?
Currently having a play with stored procedures to store the 1st result in a table and then call the second query against that - but just seems overkill compared with 'traditional' SQL Server ?!?
All pointers & hints appreciated !
Many Thanks
Original Base Query:
CREATE VIEW IF NOT EXISTS Play.[M3_CycleStartPoints]
AS
//#BASE =
SELECT ROW_NUMBER() OVER (PARTITION BY A.[CTNNumber] ORDER BY A.[SeqNo]) AS [CTNCycleNo], A.[CTNNumber], A.[SeqNo], A.[BizstepDescription], A.[ContainerStatus], A.[FillStatus]
FROM
[Play].[RawData] AS A
LEFT OUTER JOIN
(
SELECT [CTNNumber],[SeqNo]+1 AS [SeqNo],[FillStatus],[ContainerStatus],[BizstepDescription]
FROM [Play].[RawData]
WHERE [FillStatus] == "EMPTY" AND [AssetUsage] == "CYLINDER"
) AS B
ON A.[CTNNumber] == B.[CTNNumber] AND A.[SeqNo] == B.[SeqNo]
WHERE (
(A.[FillStatus] == "FULL" AND
A.[AssetUsage] == "CYLINDER" AND
B.[CTNNumber] == A.[CTNNumber]
) OR (
A.[SeqNo] == 1
)
);
//AND A.[CTNNumber] == "BE52XH7";
//Only used to test when running script as stand-alone & output to tsv
Second Query
SELECT *
FROM [Play].[M3_CycleStartPoints]
WHERE [CTNNumber] == "BE52XH7";
Ok, I think I've got this, or at least in part.
Table valued Functions
http://www.sqlservercentral.com/articles/U-SQL/146839/
to allow the passing of an argument to a view and return the result.
Would be interested in finding some reading material around this subject still though.
Coming from a T-SQL world, seems that there are some fundamental differences I'm still tripping over.
I'm not sure if I was specific in the question, but I'm having trouble creating a Postgres function that runs a Linux shell command, with one detail: it's a function in a Trigger after insert and I need to use some NEW columns.
While in MySQL, using the plugin "MySQL UDF" it was pretty simple, trigger worked like this:
BEGIN
DECLARE result int(10);
SET result = sys_exec('/usr/bin/php /var/www/html/.../regras.php NEW.uniqueid NEW.linkedid NEW.eventtype');
END
But on PostgreSQL I tried the language PL/sh, wich enables running any shell script, so I wrote the following function:
CREATE FUNCTION tarifador_func2() RETURNS TRIGGER
LANGUAGE plsh
AS $$
#!/bin/sh
/usr/bin/php /var/www/html/...regras.php NEW.uniqueid NEW.linkedid NEW.eventtype
$$;
It does execute the .php file in proper way, the problem is the language does not recognize the NEW variables I'm giving as arguments to the PHP, so in the args[] what I got is "NEW.uniqueid", "NEW.linkedid" and "NEW.eventtype".
So, anyone knows how can I properly use the NEW argument in PL/sh?
Another possible solution might be to manually set the three values I need via the arguments on crating the trigger, but it's not allowed to use NEW in the arguments.
You can access some values in plsh triggers.
UPDATE offers only OLD
INSERT offers only NEW (duh)
DELETE I didn't test
So you get those values using arguments, like $1, $2
You function would look kinda like this:
CREATE FUNCTION tarifador_func2() RETURNS TRIGGER
LANGUAGE plsh
AS $$
#!/bin/sh
/usr/bin/php /var/www/html/...regras.php $3 $6 $1
$$;
Notice that I didn't use $1 $2 $3, that is because plsh extension dumps ALL columns into arguments in order they are declared in your table. So you might do something like INSERT INTO table1 (column3) VALUES (6); and it will be under $3 in plsh, assuming this is third column in table.
As a side note, metadata of trigger is available thru env vars.
As far as I know, you cannot access the NEWand OLD tuple in PL/sh.
I would use PL/Perl or PL/Python for this purpose.
Here is an example in PL/Python:
CREATE OR REPLACE FUNCTION pytrig() RETURNS trigger
LANGUAGE plpythonu AS
$$import os
os.system("/usr/bin/php /home/laurenz/hello.php '" + TD["new"]["val"] + "'")$$;
CREATE TABLE test (id integer PRIMARY KEY, val text);
CREATE TRIGGER pytrig AFTER INSERT ON test FOR EACH ROW
EXECUTE PROCEDURE pytrig();
I am trying to use excel to update a list of part numbers in my database:
UPDATE
stock s
SET
s.STC_AUTO_KEY = 2
WHERE s.WHS_AUTO_KEY = 2 AND
EXISTS(
SELECT
p.PNM_AUTO_KEY
FROM
PARTS_MASTER p
WHERE
s.PNM_AUTO_KEY=p.PNM_AUTO_KEY AND p.PN='102550');
UPDATE
stock s
SET
s.STC_AUTO_KEY = 2
WHERE s.WHS_AUTO_KEY = 2 AND EXISTS(
SELECT
p.PNM_AUTO_KEY
FROM
PARTS_MASTER p
WHERE
s.PNM_AUTO_KEY=p.PNM_AUTO_KEY AND p.PN='204-060-444-003');
The statements run without semicolons, but when I try to run more then one at once and use semicolons I get the error:
SQL Error [911] [22019]: ORA-00911: invalid character
java.sql.SQLSyntaxErrorException: ORA-00911: invalid character
so... it looks like I don't know how run run more then one basic statement at once.
I am using DBeaver to interact with a Oracle database.
Thanks guys, sorry if this a no-brainer.
Try adding a blank line between each update statement if possible. You can do this easily with a text editor that supports regular expressions, just replace ';\n' with ';\n\n'
I am creating an SSIS Execute SQL Task that will use variables but it is giving me an error when I try to use it. When I try to run the below, it gives me an error and when I try to build the query, it gives me an error SQL Sytnax Errors encountered and unable to parse query. I am using an OLEDB connection. Am I not able to use variables to specify the tables?
You can't parameterize a table name.
Use the Expressions editor in your Execute SQL Task to Select a SqlStatementSource property.
Try "SELECT * FROM " + #[User::TableName]
After clicking OK twice (to exit the Task editor), you should be able to reopen the editor and find your table name in the SQL statement.
Add a string cast in a case where it might be a simple Object - (DT_WSTR,100)
You are using only single parameter(?) in the query and assigning 3 inputs to that parameters which is not fair put only single input and assign some variable as input as shown in image and change the value of variable respectively.
the parameter name should be incremented by 1 start with 0 because they are the indexes representing the "?" in the query which was written the query window.