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# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : QtSqlDB
Description : DB API 2.0 interface for QtSql
Date : June 6, 2015
Copyright : (C) 2015 by Jürgen E. Fischer
email : jef at norbit dot de
***************************************************************************/
/***************************************************************************
* *
* 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 qgis.PyQt.QtCore import QVariant, QDate, QTime, QDateTime, QByteArray
from qgis.PyQt.QtSql import QSqlDatabase, QSqlQuery, QSqlField
paramstyle = "qmark"
threadsafety = 1
apilevel = "2.0"
import time
import datetime
def Date(year, month, day):
return datetime.date(year, month, day)
def Time(hour, minute, second):
return datetime.time(hour, minute, second)
def Timestamp(year, month, day, hour, minute, second):
return datetime.datetime(year, month, day, hour, minute, second)
def DateFromTicks(ticks):
return Date(*time.localtime(ticks)[:3])
def TimeFromTicks(ticks):
return Time(*time.localtime(ticks)[3:6])
def TimestampFromTicks(ticks):
return Timestamp(*time.localtime(ticks)[:6])
class ConnectionError(Exception):
def __init__(self, *args, **kwargs):
super(Exception, self).__init__(*args, **kwargs)
class ExecError(Exception):
def __init__(self, *args, **kwargs):
super(Exception, self).__init__(*args, **kwargs)
class QtSqlDBCursor:
def __init__(self, conn):
self.qry = QSqlQuery(conn)
self.description = None
self.rowcount = -1
self.arraysize = 1
def close(self):
self.qry.finish()
def execute(self, operation, parameters=[]):
if len(parameters) == 0:
if not self.qry.exec_(operation):
raise ExecError(self.qry.lastError().databaseText())
else:
if not self.qry.prepare(operation):
raise ExecError(self.qry.lastError().databaseText())
for i in range(len(parameters)):
self.qry.bindValue(i, parameters[i])
if not self.qry.exec_():
raise ExecError(self.qry.lastError().databaseText())
self.rowcount = self.qry.size()
self.description = []
for c in range(self.qry.record().count()):
f = self.qry.record().field(c)
if f.type() == QVariant.Date:
t = Date
elif f.type() == QVariant.Time:
t = Time
elif f.type() == QVariant.DateTime:
t = Timestamp
elif f.type() == QVariant.Double:
t = float
elif f.type() == QVariant.Int:
t = int
elif f.type() == QVariant.String:
t = unicode
elif f.type() == QVariant.ByteArray:
t = unicode
else:
continue
self.description.append([
f.name(), # name
t, # type_code
f.length(), # display_size
f.length(), # internal_size
f.precision(), # precision
None, # scale
f.requiredStatus() != QSqlField.Required # null_ok
])
def executemany(self, operation, seq_of_parameters):
if len(seq_of_parameters) == 0:
return
if not self.qry.prepare(operation):
raise ExecError(self.qry.lastError().databaseText())
for r in seq_of_parameters:
for i in range(len(r)):
self.qry.bindValue(i, r[i])
if not self.qry.exec_():
raise ExecError(self.qry.lastError().databaseText())
def scroll(self, row):
return self.qry.seek(row)
def fetchone(self):
if not self.qry.next():
return None
row = []
for i in range(len(self.description)):
value = self.qry.value(i)
if (isinstance(value, QDate)
or isinstance(value, QTime)
or isinstance(value, QDateTime)):
value = value.toString()
elif isinstance(value, QByteArray):
value = u"GEOMETRY"
# value = value.toHex()
row.append(value)
return row
def fetchmany(self, size=10):
rows = []
while len(rows) < size:
row = self.fetchone()
if row is None:
break
rows.append(row)
return rows
def fetchall(self):
rows = []
while True:
row = self.fetchone()
if row is None:
break
rows.append(row)
return rows
def setinputsize(self, sizes):
raise ExecError("nyi")
def setoutputsize(self, size, column=None):
raise ExecError("nyi")
class QtSqlDBConnection:
connections = 0
def __init__(self, driver, dbname, user, passwd):
self.conn = QSqlDatabase.addDatabase(
driver, "qtsql_%d" % QtSqlDBConnection.connections)
QtSqlDBConnection.connections += 1
self.conn.setDatabaseName(dbname)
self.conn.setUserName(user)
self.conn.setPassword(passwd)
if not self.conn.open():
raise ConnectionError(self.conn.lastError().databaseText())
def close(self):
self.conn.close()
def commit(self):
self.conn.commit()
def rollback(self):
self.conn.rollback()
def cursor(self):
return QtSqlDBCursor(self.conn)
def connect(driver, dbname, user, passwd):
return QtSqlDBConnection(driver, dbname, user, passwd)
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