BACK: Inserting a variable into cur.execute statement

[Hagen Finley]

Hello,

I finally got around to trying to implement this code and I am running 
into an "IndexError: tuple index out of range" problem.

I am running a function with parameters from a list:

def def_acct_analysis(sht,acct):
    print(param[par][0])
    print(param[par][1])
    sheet ="sheet"+str(sht)
    print(sheet)
    account = acct
    print(account)

par =0 param = [(1,'ACCT0'),(2,'ACCT1'),(3,'ACCT2'),]

for pin param:
    def_acct_analysis(param[par][0], param[par][1])

    par +=1

#Print statements above output:

1
ACCT0
sheet1
ACCT0

I want to insert the account name 'ACCT0' into my cur.execute but I get 
an error with this code:

cur.execute("SELECT COALESCE(SUM(revusd),0) FROM sfdc where stage LIKE 'Win%' AND 
saccount = %s", (account,))
wind1 = cur.fetchone()
conn.commit()

Traceback (most recent call last):
  File 
"/home/datasundae/PycharmProjects/Registration_Reports/sfdc_Account_Tab_Analysis_Function.py", 
line 333, in <module>
def_acct_analysis(param[par][0], param[par][1])
File 
"/home/datasundae/PycharmProjects/Registration_Reports/sfdc_Account_Tab_Analysis_Function.py", 
line 96, in def_acct_analysis
  cur.execute("SELECT COALESCE(SUM(revusd),0) FROM sfdc where stage 
LIKE 'Win%' AND saccount = %s", (account,))
*IndexError: tuple index out of range*
I've returned to the psycopg docs but I don't see my error. Can someone 
else see it?

Best,

Hagen

On 12/7/20 3:31 PM, Adrian Klaver wrote:
On 12/7/20 2:26 PM, ha...@datasundae.com wrote:
So if I understand this correctly my new cur.execute would read:

account = 'JPMC'

  cur.execute("SELECT SUM(revusd) FROM sfdc where saccount = %s AND 
stage LIKE 'Commit%';",(account ))

Since you are using a tuple this (account ) would need to be 
(account,) per the docs at link previously posted:

"For positional variables binding, the second argument must always be 
a sequence, even if it contains a single variable (remember that 
Python requires a comma to create a single element tuple):"




and that would translate to

cur.execute("SELECT SUM(revusd) FROM sfdc where saccount = 'JPMC' AND 
stage LIKE 'Commit%';")

is that right?



Not sure what below is supposed to be about?


Note You can use a Python list as the argument of the IN operator 
using the PostgreSQL ANY operator.
ids = [10, 20, 30]
cur.execute("SELECT * FROM data WHERE id = ANY(%s);", (ids,))
Furthermore ANY can also work with empty lists, whereas IN () is a 
SQL syntax error.

-----Original Message-----
From: Adrian Klaver <adrian.kla...@aklaver.com>
Sent: Monday, December 7, 2020 3:04 PM
To: ha...@datasundae.com; psycopg@lists.postgresql.org; 
psyc...@postgresql.org
Subject: Re: Inserting variable into

On 12/7/20 2:02 PM, ha...@datasundae.com wrote:
Hello,

I'd like to use a variable for 'Big Company' (e.g. account) or where 
= statements generally in my cur.execute statements:

cur.execute("SELECT SUM(revusd) FROM sfdc where saccount = 'Big 
Company' AND stage LIKE 'Commit%';")
commitd1 = cur.fetchone()
conn.commit()

but I don't know the proper syntax with the cur.execute statement to 
use a variable.

https://www.psycopg.org/docs/usage.html#passing-parameters-to-sql-queries 



I imagine others do  - thanks!

Best,

Hagen