Python - 使用字典更新或插入到 sqlite

Question

I am trying to UPDATE or INSERT if not exist rows into sqlite table. Can't manage to do this from python level using executemany

my input csv looks like this:

cfthostname,cftshortname,cftenv,cert_time
lx1234.pl.net,lx1234,tst,28/01/2021
plx169.net,plx169,tst,26/03/2021
sp2444445.net,sp2444445,prd,12/06/2021

my db model :

cfthostname,cftshortname,cftenv,cert_time
lx1234.pl.net,lx1234,tst,DD/MM/RRRR
plx169.net,plx169,tst,DD/MM/RRRR
sp2444445.net,sp2444445,prd,DD/MM/RRRR

what i need to do is:
1. UPDATE cert_time column if cfthostname in input csv matches cfthostname in db
2. INSERT all 4 columns if cfthostname does not exists in DB

db_update.py

import sqlite3
import csv

conn = sqlite3.connect("C:\db.sqlite3")
cursor = conn.cursor()
[...]
######---Import to DB---######
cursor.execute("CREATE TABLE IF NOT EXISTS itpassed_host (cfthostname, cftshortname, cftenv, cert_time);")
with open('C:\csv\cfthosts.csv','rt') as fin:
    dr = csv.DictReader(fin)
    to_db = [(i['cfthostname'], i['cftshortname'], i['cftenv'], i['cert_time']) for i in dr]

cursor.executemany("INSERT INTO itpassed_host (cfthostname, cftshortname, cftenv, cert_time) VALUES (?, ?, ?, ?) ON CONFLICT (cfthostname) DO UPDATE SET cert_time=excluded.cert_time;", to_db)
conn.commit()
conn.close()

i get

sqlite3.OperationalError: near "ON": syntax error

i have sqlite 3.7.17

Answer 1

Use "WHERE True" to avoid this conflict:

cursor.executemany("INSERT INTO itpassed_host (cfthostname, cftshortname, cftenv, cert_time) VALUES (?, ?, ?, ?) **WHERE True** ON CONFLICT (cfthostname) DO UPDATE SET cert_time=excluded.cert_time;", to_db)

UPSERT Parsing Ambiguity