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我有一个围绕 sqlite3 模块编写的包装器,它可以让我序列化来自多个线程的访问。它还允许我在更改表定义时自动迁移表。我注意到当我删除一个表并用更多列重新添加它时,我得到一个索引超出范围错误。像这样的东西:

conn = sqlite3.connect("test.db", detect_types=sqlite3.PARSE_COLNAMES)
curs = conn.cursor()

curs.execute("CREATE TABLE test (derp TEXT);"); conn.commit()
curs.execute("INSERT INTO test (derp) VALUES ('deedle');"); conn.commit()
print curs.execute("SELECT * FROM test;").fetchall()
curs.execute("DROP TABLE test;"); conn.commit()
curs.execute("CREATE TABLE test (derp TEXT, val REAL);"); conn.commit()
curs.execute("INSERT INTO test (derp) VALUES ('deedle');"); conn.commit()
print curs.execute("SELECT * FROM test;").fetchall()

conn.close()

将打印这个:

[(u'deedle',)] Traceback (most recent
call last):   File "test.py", line 23,
in <module>
    print curs.execute("SELECT * FROM test;").fetchall() IndexError: list
index out of range

执行第二个 SELECT 语句时。有人知道为什么是这样吗?

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1 回答 1

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好吧,它对我来说很好用 [(u'deedle',)] [(u'deedle', None)]

于 2011-05-11T19:21:01.607 回答