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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2016 Andi Albrecht, albrecht.andi@gmail.com
#
# This example is part of python-sqlparse and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php
#
# Example for retrieving column definitions from a CREATE statement
# using low-level functions.
import sqlparse
SQL = """CREATE TABLE foo (
id integer primary key,
title varchar(200) not null,
description text
);"""
parsed = sqlparse.parse(SQL)[0]
# extract the parenthesis which holds column definitions
par = parsed.token_next_by(i=sqlparse.sql.Parenthesis)
def extract_definitions(token_list):
# assumes that token_list is a parenthesis
definitions = []
tmp = []
# grab the first token, ignoring whitespace
token = token_list.token_next(0)
while token and not token.match(sqlparse.tokens.Punctuation, ')'):
tmp.append(token)
idx = token_list.token_index(token)
# grab the next token, this times including whitespace
token = token_list.token_next(idx, skip_ws=False)
# split on ",", except when on end of statement
if token and token.match(sqlparse.tokens.Punctuation, ','):
definitions.append(tmp)
tmp = []
idx = token_list.token_index(token)
token = token_list.token_next(idx)
if tmp and isinstance(tmp[0], sqlparse.sql.Identifier):
definitions.append(tmp)
return definitions
columns = extract_definitions(par)
for column in columns:
print('NAME: %-12s DEFINITION: %s' % (column[0],
''.join(str(t) for t in column[1:])))
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