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
|
# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : DB Manager
Description : Database manager plugin for QGIS
Date : May 23, 2011
copyright : (C) 2011 by Giuseppe Sucameli
email : brush.tyler@gmail.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from ..data_model import TableDataModel, SqlResultModel
from ..plugin import BaseError
class PGTableDataModel(TableDataModel):
def __init__(self, table, parent=None):
self.cursor = None
TableDataModel.__init__(self, table, parent)
if self.table.rowCount == None:
self.table.refreshRowCount()
if self.table.rowCount == None:
return
self.connect(self.table, SIGNAL("aboutToChange"), self._deleteCursor)
self._createCursor()
def _createCursor(self):
fields_txt = u", ".join(self.fields)
table_txt = self.db.quoteId( (self.table.schemaName(), self.table.name) )
self.cursor = self.db._get_cursor()
sql = u"SELECT %s FROM %s" % (fields_txt, table_txt)
self.db._execute(self.cursor, sql)
def _sanitizeTableField(self, field):
# get fields, ignore geometry columns
if field.dataType.lower() == "geometry":
return u"CASE WHEN %(fld)s IS NULL THEN NULL ELSE GeometryType(%(fld)s) END AS %(fld)s" % {'fld': self.db.quoteId(field.name)}
elif field.dataType.lower() == "raster":
return u"CASE WHEN %(fld)s IS NULL THEN NULL ELSE 'RASTER' END AS %(fld)s" % {'fld': self.db.quoteId(field.name)}
return u"%s::text" % self.db.quoteId(field.name)
def _deleteCursor(self):
self.db._close_cursor(self.cursor)
self.cursor = None
def __del__(self):
self.disconnect(self.table, SIGNAL("aboutToChange"), self._deleteCursor)
self._deleteCursor()
pass #print "PGTableModel.__del__"
def fetchMoreData(self, row_start):
if not self.cursor:
self._createCursor()
try:
self.cursor.scroll(row_start, mode='absolute')
except self.db.error_types():
self._deleteCursor()
return self.fetchMoreData(row_start)
self.resdata = self.cursor.fetchmany(self.fetchedCount)
self.fetchedFrom = row_start
class PGSqlResultModel(SqlResultModel):
pass
|
