本文整理匯總了Python中qgis.PyQt.QtSql.QSqlQuery.size方法的典型用法代碼示例。如果您正苦於以下問題：Python QSqlQuery.size方法的具體用法？Python QSqlQuery.size怎麽用？Python QSqlQuery.size使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類qgis.PyQt.QtSql.QSqlQuery的用法示例。
在下文中一共展示了QSqlQuery.size方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: __checkLoggingTableExists
# 需要導入模塊: from qgis.PyQt.QtSql import QSqlQuery [as 別名]
# 或者: from qgis.PyQt.QtSql.QSqlQuery import size [as 別名]
def __checkLoggingTableExists(self):
sql = "SELECT table_name FROM information_schema.tables WHERE table_name = 'postnas_search_logging'";
self.__openDB()
query = QSqlQuery(self.db)
query.exec_(sql)
if(query.size() > 0):
return True
else:
return False示例2: QtSqlDBCursor
# 需要導入模塊: from qgis.PyQt.QtSql import QSqlQuery [as 別名]
# 或者: from qgis.PyQt.QtSql.QSqlQuery import size [as 別名]
class QtSqlDBCursor(object):
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 = str
elif f.type() == QVariant.ByteArray:
t = str
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 next(self.qry):
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)
#.........這裏部分代碼省略.........