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#!/usr/bin/env python
#
# Copyright (C) 2009-2020 the sqlparse authors and contributors
# <see AUTHORS file>
#
# This example is part of python-sqlparse and is released under
# the BSD License: https://opensource.org/licenses/BSD-3-Clause
#
# Example for retrieving column definitions from a CREATE statement
# using low-level functions.
import sqlparse
def extract_definitions(token_list):
# assumes that token_list is a parenthesis
definitions = []
tmp = []
par_level = 0
for token in token_list.flatten():
if token.is_whitespace:
continue
elif token.match(sqlparse.tokens.Punctuation, '('):
par_level += 1
continue
if token.match(sqlparse.tokens.Punctuation, ')'):
if par_level == 0:
break
else:
par_level -= 1
elif token.match(sqlparse.tokens.Punctuation, ','):
if tmp:
definitions.append(tmp)
tmp = []
else:
tmp.append(token)
if tmp:
definitions.append(tmp)
return definitions
if __name__ == '__main__':
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)
columns = extract_definitions(par)
for column in columns:
print('NAME: {name!s:12} DEFINITION: {definition}'.format(
name=column[0], definition=' '.join(str(t) for t in column[1:])))
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