PeterHarding at 00:46, 25 January 2008

2008-01-25T00:46:52Z

← Older revision		Revision as of 10:46, 25 January 2008
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PeterHarding at 00:46, 25 January 2008

2008-01-25T00:46:12Z

← Older revision		Revision as of 10:46, 25 January 2008
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			Back to [[Python]]

	= Script =		= Script =

	Here is an interesting little script which parses SQL and then reformats it to stdout:		Here is an interesting little script which parses SQL and then reformats it to stdout:

	</pre>		<pre>
	#!/usr/bin/env python		#!/usr/bin/env python
	#		#
Line 91:		Line 93:
	OFFSET 10;		OFFSET 10;
	</pre>		</pre>

			Back to [[Python]]

PeterHarding: New page: = Script = Here is an interesting little script which parses SQL and then reformats it to stdout: #!/usr/bin/env python # # Pretty print SQL statements # by Peter Bengtsson, www.p...

2008-01-25T00:45:46Z

New page: = Script = Here is an interesting little script which parses SQL and then reformats it to stdout: </pre> #!/usr/bin/env python # # Pretty print SQL statements # by Peter Bengtsson, www.p...

New page

= Script =

Here is an interesting little script which parses SQL and then reformats it to stdout:

</pre>
#!/usr/bin/env python
#
# Pretty print SQL statements
# by Peter Bengtsson, www.peterbe.com
# August, 2004

import re

__version__='0.1'

def printsql(sql):
""" simple version of pprint for SQL strings """
keywords = ('select','from','where','order by','desc','asc',
'limit','offset','update','delete','insert','set',
'having','group by','count','table','create',
'drop','and','or','in','ilike','like',
)
aloner = lambda x: '(\s%s\s|^%s\s|\s%s$)'%(x,x,x)

re_flags = re.I|re.MULTILINE
regex = '|'.join(map(aloner, keywords))
anykeyword = re.compile(regex, re_flags)
for each in anykeyword.findall(sql):
each = list(each)
while '' in each:each.remove('')
for subeach in each:
sql = sql.replace(subeach, subeach.upper())

if len(sql) > 10:

spad = ' '

regex = re.compile('(SELECT\s(.*?))(\sFROM\s(.*?)\s)', re_flags)
found = regex.findall(sql)
if found:
sql = sql.replace(found[0][0], 'SELECT\n%s%s\n'%(spad, found[0][1]))
sql = sql.replace(found[0][2], 'FROM\n %s\n'%found[0][3])

regex = re.compile('(ORDER BY\s(.*?))(\sLIMIT\s(.*?)\s)', re_flags)
found = regex.findall(sql)
if found:
sql = sql.replace(found[0][0], '\nORDER BY %s\n'%found[0][1])
sql = sql.replace(found[0][2], 'LIMIT %s\n'%found[0][3])

regex = re.compile('(\s+WHERE\s(.*?)\s(GROUP BY|ORDER BY|LIMIT))', re_flags)
found = regex.findall(sql)
if found:
sql = sql.replace(found[0][0],
'\nWHERE\n%s%s\n%s'%(spad, found[0][1],found[0][2]))

return sql

def test(s):
print printsql(s)
print

if __name__=='__main__':
print "TESTING SOME SQL"
print
test('select * from foo order by bar;')
test('''select id, bull, time from foobartable
where time=1 and stuff='yes' order by bar limit 30 offset 10;''')
</pre>

= Output =

<pre>
$ ./printsql.py
TESTING SOME SQL

SELECT
*
FROM
foo
ORDER BY bar;

SELECT
id, bull, time
FROM
foobartable
WHERE
time=1 AND stuff='yes'
ORDER BY bar
LIMIT 30
OFFSET 10;
</pre>

Python - printsql - Revision history

PeterHarding at 00:46, 25 January 2008

PeterHarding at 00:46, 25 January 2008

PeterHarding: New page: = Script = Here is an interesting little script which parses SQL and then reformats it to stdout: #!/usr/bin/env python # # Pretty print SQL statements # by Peter Bengtsson, www.p...