121 lines
4.0 KiB
Python
121 lines
4.0 KiB
Python
import datetime
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from time import time
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class CursorDebugWrapper(object):
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def __init__(self, cursor, db):
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self.cursor = cursor
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self.db = db
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def execute(self, sql, params=()):
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start = time()
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try:
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return self.cursor.execute(sql, params)
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finally:
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stop = time()
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# If params was a list, convert it to a tuple, because string
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# formatting with '%' only works with tuples or dicts.
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if not isinstance(params, (tuple, dict)):
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params = tuple(params)
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self.db.queries.append({
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'sql': sql % params,
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'time': "%.3f" % (stop - start),
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})
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def executemany(self, sql, param_list):
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start = time()
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try:
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return self.cursor.executemany(sql, param_list)
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finally:
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stop = time()
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self.db.queries.append({
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'sql': 'MANY: ' + sql + ' ' + str(tuple(param_list)),
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'time': "%.3f" % (stop - start),
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})
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def __getattr__(self, attr):
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if self.__dict__.has_key(attr):
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return self.__dict__[attr]
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else:
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return getattr(self.cursor, attr)
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###############################################
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# Converters from database (string) to Python #
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###############################################
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def typecast_date(s):
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return s and datetime.date(*map(int, s.split('-'))) or None # returns None if s is null
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def typecast_time(s): # does NOT store time zone information
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if not s: return None
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hour, minutes, seconds = s.split(':')
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if '.' in seconds: # check whether seconds have a fractional part
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seconds, microseconds = seconds.split('.')
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else:
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microseconds = '0'
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return datetime.time(int(hour), int(minutes), int(seconds), int(float('.'+microseconds) * 1000000))
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def typecast_timestamp(s): # does NOT store time zone information
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# "2005-07-29 15:48:00.590358-05"
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# "2005-07-29 09:56:00-05"
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if not s: return None
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if not ' ' in s: return typecast_date(s)
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d, t = s.split()
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# Extract timezone information, if it exists. Currently we just throw
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# it away, but in the future we may make use of it.
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if '-' in t:
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t, tz = t.split('-', 1)
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tz = '-' + tz
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elif '+' in t:
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t, tz = t.split('+', 1)
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tz = '+' + tz
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else:
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tz = ''
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dates = d.split('-')
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times = t.split(':')
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seconds = times[2]
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if '.' in seconds: # check whether seconds have a fractional part
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seconds, microseconds = seconds.split('.')
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else:
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microseconds = '0'
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return datetime.datetime(int(dates[0]), int(dates[1]), int(dates[2]),
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int(times[0]), int(times[1]), int(seconds), int(float('.'+microseconds) * 1000000))
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def typecast_boolean(s):
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if s is None: return None
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if not s: return False
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return str(s)[0].lower() == 't'
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###############################################
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# Converters from Python to database (string) #
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###############################################
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def rev_typecast_boolean(obj, d):
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return obj and '1' or '0'
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##################################################################################
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# Helper functions for dictfetch* for databases that don't natively support them #
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##################################################################################
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def _dict_helper(desc, row):
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"Returns a dictionary for the given cursor.description and result row."
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return dict(zip([col[0] for col in desc], row))
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def dictfetchone(cursor):
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"Returns a row from the cursor as a dict"
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row = cursor.fetchone()
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if not row:
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return None
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return _dict_helper(cursor.description, row)
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def dictfetchmany(cursor, number):
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"Returns a certain number of rows from a cursor as a dict"
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desc = cursor.description
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for row in cursor.fetchmany(number):
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yield _dict_helper(desc, row)
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def dictfetchall(cursor):
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"Returns all rows from a cursor as a dict"
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desc = cursor.description
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for row in cursor.fetchall():
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yield _dict_helper(desc, row)
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