用於Python的SQL解析庫

Question

我們需要用於Python的SQL解析或分解庫。我們希望能夠輸入一個SQL文本查詢，然後作爲結果返回查詢部分。它不需要花哨，或者任何東西，但我們會喜歡避免自己進行解析。理想情況下，我們可以這樣做：

the_query = "select something from some_table where blah = 'thing' limit 15" 
query_parts = the_library.parse(the_query) 
print query_parts.limit().val() 

>>> '15' 

而這一點，也：

the_query = "select something from some_table where blah = 'thing'" 
query_parts = the_library.parse(the_query) 
print query_parts.limit().val() 

>>> None 

誰能給我們這方面的任何指針？如果功能更有限，那也可以。

非常感謝！

Answer 1

你可能想看看sqlparse

從他們的網頁公然被盜：

>>> # Parsing 
>>> res = sqlparse.parse('select * from "someschema"."mytable" where id = 1') 
>>> res 
<<< (<Statement 'select...' at 0x9ad08ec>,) 
>>> stmt = res[0] 
>>> stmt.to_unicode() # converting it back to unicode 
<<< u'select * from "someschema"."mytable" where id = 1' 
>>> # This is how the internal representation looks like: 
>>> stmt.tokens 
<<< 
(<DML 'select' at 0x9b63c34>, 
<Whitespace ' ' at 0x9b63e8c>, 
<Operator '*' at 0x9b63e64>, 
<Whitespace ' ' at 0x9b63c5c>, 
<Keyword 'from' at 0x9b63c84>, 
<Whitespace ' ' at 0x9b63cd4>, 
<Identifier '"somes...' at 0x9b5c62c>, 
<Whitespace ' ' at 0x9b63f04>, 
<Where 'where ...' at 0x9b5caac>) 
>>>