| Georg Brandl | 116aa62 | 2007-08-15 14:28:22 +0000 | [diff] [blame] | 1 | import sqlite3 |
| 2 | |
| 3 | class MySum: |
| 4 | def __init__(self): |
| 5 | self.count = 0 |
| 6 | |
| 7 | def step(self, value): |
| 8 | self.count += value |
| 9 | |
| 10 | def finalize(self): |
| 11 | return self.count |
| 12 | |
| 13 | con = sqlite3.connect(":memory:") |
| 14 | con.create_aggregate("mysum", 1, MySum) |
| 15 | cur = con.cursor() |
| 16 | cur.execute("create table test(i)") |
| 17 | cur.execute("insert into test(i) values (1)") |
| 18 | cur.execute("insert into test(i) values (2)") |
| 19 | cur.execute("select mysum(i) from test") |
| 20 | print(cur.fetchone()[0]) |