How to get SQLite result/error codes in Python

Question

How do I get the (extended) result/error code from an SQLite query in Python? For example:

con = sqlite3.connect(\"mydb.sqlite\")
cur = con.cursor() 
sql_query =         


        

Answer 1

#More info on related error can be taken by:

import sqlite3
import traceback
import sys

con = sqlite3.connect("mydb.sqlite")
cur = con.cursor() 
sql_query = "INSERT INTO user VALUES(?, ?)"     
sql_data = ("John", "MacDonald")

try:
    cur.execute(sql_query, sql)
    self.con.commit()
except sqlite3.Error as er:
    print('SQLite error: %s' % (' '.join(er.args)))
    print("Exception class is: ", er.__class__)
    print('SQLite traceback: ')
    exc_type, exc_value, exc_tb = sys.exc_info()
    print(traceback.format_exception(exc_type, exc_value, exc_tb))
con.close()

Answer 2

Currently, you can't get error codes through Python's sqlite3 module. Per https://www.sqlite.org/c3ref/errcode.html, the C API exposes basic error codes, extended error codes, and error messages through sqlite3_errcode, sqlite3_extended_errcode and sqlite3_errmsg respectively. However, searching the CPython source reveals that:

• sqlite3_extended_errcode never even gets called
• sqlite3_errmsg gets called and the result exposed as an Exception message
• sqlite3_errcode gets called, but the result is never exposed directly; it's just used to decide which Exception class to raise

While the feature you're asking for would be useful (indeed, I need it right now for debugging and am frustrated by its absence), it simply doesn't exist right now.