/usr/lib/python2.7/dist-packages/debug_toolbar/panels/sql/panel.py is in python-django-debug-toolbar 1:1.0.1-0+nmu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | from __future__ import absolute_import, unicode_literals
import uuid
from copy import copy
from django.conf.urls import patterns, url
from django.db import connections
from django.utils.translation import ugettext_lazy as _, ungettext_lazy as __
from debug_toolbar.panels import Panel
from debug_toolbar.panels.sql.forms import SQLSelectForm
from debug_toolbar.utils import render_stacktrace
from debug_toolbar.panels.sql.utils import reformat_sql
from debug_toolbar.panels.sql.tracking import wrap_cursor, unwrap_cursor
def get_isolation_level_display(engine, level):
if engine == 'psycopg2':
import psycopg2.extensions
choices = {
psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT: _("Autocommit"),
psycopg2.extensions.ISOLATION_LEVEL_READ_UNCOMMITTED: _("Read uncommitted"),
psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED: _("Read committed"),
psycopg2.extensions.ISOLATION_LEVEL_REPEATABLE_READ: _("Repeatable read"),
psycopg2.extensions.ISOLATION_LEVEL_SERIALIZABLE: _("Serializable"),
}
else:
raise ValueError(engine)
return choices.get(level)
def get_transaction_status_display(engine, level):
if engine == 'psycopg2':
import psycopg2.extensions
choices = {
psycopg2.extensions.TRANSACTION_STATUS_IDLE: _("Idle"),
psycopg2.extensions.TRANSACTION_STATUS_ACTIVE: _("Active"),
psycopg2.extensions.TRANSACTION_STATUS_INTRANS: _("In transaction"),
psycopg2.extensions.TRANSACTION_STATUS_INERROR: _("In error"),
psycopg2.extensions.TRANSACTION_STATUS_UNKNOWN: _("Unknown"),
}
else:
raise ValueError(engine)
return choices.get(level)
class SQLPanel(Panel):
"""
Panel that displays information about the SQL queries run while processing
the request.
"""
def __init__(self, *args, **kwargs):
super(SQLPanel, self).__init__(*args, **kwargs)
self._offset = dict((k, len(connections[k].queries)) for k in connections)
self._sql_time = 0
self._num_queries = 0
self._queries = []
self._databases = {}
self._transaction_status = {}
self._transaction_ids = {}
def get_transaction_id(self, alias):
if alias not in connections:
return
conn = connections[alias].connection
if not conn:
return
engine = conn.__class__.__module__.split('.', 1)[0]
if engine == 'psycopg2':
cur_status = conn.get_transaction_status()
else:
raise ValueError(engine)
last_status = self._transaction_status.get(alias)
self._transaction_status[alias] = cur_status
if not cur_status:
# No available state
return None
if cur_status != last_status:
if cur_status:
self._transaction_ids[alias] = uuid.uuid4().hex
else:
self._transaction_ids[alias] = None
return self._transaction_ids[alias]
def record(self, alias, **kwargs):
self._queries.append((alias, kwargs))
if alias not in self._databases:
self._databases[alias] = {
'time_spent': kwargs['duration'],
'num_queries': 1,
}
else:
self._databases[alias]['time_spent'] += kwargs['duration']
self._databases[alias]['num_queries'] += 1
self._sql_time += kwargs['duration']
self._num_queries += 1
# Implement the Panel API
nav_title = _("SQL")
@property
def nav_subtitle(self):
return __("%d query in %.2fms", "%d queries in %.2fms",
self._num_queries) % (self._num_queries, self._sql_time)
@property
def title(self):
count = len(self._databases)
return __('SQL queries from %(count)d connection',
'SQL queries from %(count)d connections',
count) % {'count': count}
template = 'debug_toolbar/panels/sql.html'
@classmethod
def get_urls(cls):
return patterns('debug_toolbar.panels.sql.views', # noqa
url(r'^sql_select/$', 'sql_select', name='sql_select'),
url(r'^sql_explain/$', 'sql_explain', name='sql_explain'),
url(r'^sql_profile/$', 'sql_profile', name='sql_profile'),
)
def enable_instrumentation(self):
# This is thread-safe because database connections are thread-local.
for connection in connections.all():
wrap_cursor(connection, self)
def disable_instrumentation(self):
for connection in connections.all():
unwrap_cursor(connection)
def process_response(self, request, response):
if self._queries:
width_ratio_tally = 0
factor = int(256.0 / (len(self._databases) * 2.5))
for n, db in enumerate(self._databases.values()):
rgb = [0, 0, 0]
color = n % 3
rgb[color] = 256 - n / 3 * factor
nn = color
# XXX: pretty sure this is horrible after so many aliases
while rgb[color] < factor:
nc = min(256 - rgb[color], 256)
rgb[color] += nc
nn += 1
if nn > 2:
nn = 0
rgb[nn] = nc
db['rgb_color'] = rgb
trans_ids = {}
trans_id = None
i = 0
for alias, query in self._queries:
trans_id = query.get('trans_id')
last_trans_id = trans_ids.get(alias)
if trans_id != last_trans_id:
if last_trans_id:
self._queries[(i - 1)][1]['ends_trans'] = True
trans_ids[alias] = trans_id
if trans_id:
query['starts_trans'] = True
if trans_id:
query['in_trans'] = True
query['alias'] = alias
if 'iso_level' in query:
query['iso_level'] = get_isolation_level_display(query['engine'],
query['iso_level'])
if 'trans_status' in query:
query['trans_status'] = get_transaction_status_display(query['engine'],
query['trans_status'])
query['form'] = SQLSelectForm(auto_id=None, initial=copy(query))
if query['sql']:
query['sql'] = reformat_sql(query['sql'])
query['rgb_color'] = self._databases[alias]['rgb_color']
try:
query['width_ratio'] = (query['duration'] / self._sql_time) * 100
query['width_ratio_relative'] = (
100.0 * query['width_ratio'] / (100.0 - width_ratio_tally))
except ZeroDivisionError:
query['width_ratio'] = 0
query['width_ratio_relative'] = 0
query['start_offset'] = width_ratio_tally
query['end_offset'] = query['width_ratio'] + query['start_offset']
width_ratio_tally += query['width_ratio']
query['stacktrace'] = render_stacktrace(query['stacktrace'])
i += 1
if trans_id:
self._queries[(i - 1)][1]['ends_trans'] = True
self.record_stats({
'databases': sorted(self._databases.items(), key=lambda x: -x[1]['time_spent']),
'queries': [q for a, q in self._queries],
'sql_time': self._sql_time,
})
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