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1# 

2# Copyright (C) 2009-2020 the sqlparse authors and contributors 

3# <see AUTHORS file> 

4# 

5# This module is part of python-sqlparse and is released under 

6# the BSD License: https://opensource.org/licenses/BSD-3-Clause 

7 

8"""Parse SQL statements.""" 

9 

10# Setup namespace 

11from sqlparse import sql 

12from sqlparse import cli 

13from sqlparse import engine 

14from sqlparse import tokens 

15from sqlparse import filters 

16from sqlparse import formatter 

17 

18 

19__version__ = '0.4.3' 

20__all__ = ['engine', 'filters', 'formatter', 'sql', 'tokens', 'cli'] 

21 

22 

23def parse(sql, encoding=None): 

24 """Parse sql and return a list of statements. 

25 

26 :param sql: A string containing one or more SQL statements. 

27 :param encoding: The encoding of the statement (optional). 

28 :returns: A tuple of :class:`~sqlparse.sql.Statement` instances. 

29 """ 

30 return tuple(parsestream(sql, encoding)) 

31 

32 

33def parsestream(stream, encoding=None): 

34 """Parses sql statements from file-like object. 

35 

36 :param stream: A file-like object. 

37 :param encoding: The encoding of the stream contents (optional). 

38 :returns: A generator of :class:`~sqlparse.sql.Statement` instances. 

39 """ 

40 stack = engine.FilterStack() 

41 stack.enable_grouping() 

42 return stack.run(stream, encoding) 

43 

44 

45def format(sql, encoding=None, **options): 

46 """Format *sql* according to *options*. 

47 

48 Available options are documented in :ref:`formatting`. 

49 

50 In addition to the formatting options this function accepts the 

51 keyword "encoding" which determines the encoding of the statement. 

52 

53 :returns: The formatted SQL statement as string. 

54 """ 

55 stack = engine.FilterStack() 

56 options = formatter.validate_options(options) 

57 stack = formatter.build_filter_stack(stack, options) 

58 stack.postprocess.append(filters.SerializerUnicode()) 

59 return ''.join(stack.run(sql, encoding)) 

60 

61 

62def split(sql, encoding=None): 

63 """Split *sql* into single statements. 

64 

65 :param sql: A string containing one or more SQL statements. 

66 :param encoding: The encoding of the statement (optional). 

67 :returns: A list of strings. 

68 """ 

69 stack = engine.FilterStack() 

70 return [str(stmt).strip() for stmt in stack.run(sql, encoding)]