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78c3423861
Works around GDAL limitation reported in: https://trac.osgeo.org/gdal/ticket/6910 Ref #16625 Ref #16626
437 lines
15 KiB
Python
437 lines
15 KiB
Python
# -*- coding: utf-8 -*-
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"""
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/***************************************************************************
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Name : DB Manager
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Description : Database manager plugin for QGIS
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Date : May 23, 2011
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copyright : (C) 2011 by Giuseppe Sucameli
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email : brush.tyler@gmail.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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"""
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from builtins import str
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from builtins import map
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from builtins import range
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# this will disable the dbplugin if the connector raise an ImportError
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from .connector import PostGisDBConnector
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from qgis.PyQt.QtCore import Qt, QRegExp
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from qgis.PyQt.QtGui import QIcon
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from qgis.PyQt.QtWidgets import QAction, QApplication, QMessageBox
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from qgis.core import QgsSettings
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from qgis.gui import QgsMessageBar
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from ..plugin import ConnectionError, InvalidDataException, DBPlugin, Database, Schema, Table, VectorTable, RasterTable, \
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TableField, TableConstraint, TableIndex, TableTrigger, TableRule
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import re
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from . import resources_rc # NOQA
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def classFactory():
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return PostGisDBPlugin
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class PostGisDBPlugin(DBPlugin):
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@classmethod
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def icon(self):
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return QIcon(":/db_manager/postgis/icon")
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@classmethod
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def typeName(self):
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return 'postgis'
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@classmethod
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def typeNameString(self):
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return 'PostGIS'
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@classmethod
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def providerName(self):
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return 'postgres'
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@classmethod
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def connectionSettingsKey(self):
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return '/PostgreSQL/connections'
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def databasesFactory(self, connection, uri):
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return PGDatabase(connection, uri)
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def connect(self, parent=None):
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conn_name = self.connectionName()
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settings = QgsSettings()
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settings.beginGroup(u"/%s/%s" % (self.connectionSettingsKey(), conn_name))
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if not settings.contains("database"): # non-existent entry?
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raise InvalidDataException(self.tr('There is no defined database connection "{0}".').format(conn_name))
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from qgis.core import QgsDataSourceUri
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uri = QgsDataSourceUri()
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settingsList = ["service", "host", "port", "database", "username", "password", "authcfg"]
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service, host, port, database, username, password, authcfg = [settings.value(x, "", type=str) for x in settingsList]
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useEstimatedMetadata = settings.value("estimatedMetadata", False, type=bool)
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sslmode = settings.value("sslmode", QgsDataSourceUri.SslPrefer, type=int)
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settings.endGroup()
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if hasattr(authcfg, 'isNull') and authcfg.isNull():
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authcfg = ''
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if service:
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uri.setConnection(service, database, username, password, sslmode, authcfg)
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else:
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uri.setConnection(host, port, database, username, password, sslmode, authcfg)
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uri.setUseEstimatedMetadata(useEstimatedMetadata)
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try:
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return self.connectToUri(uri)
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except ConnectionError:
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return False
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class PGDatabase(Database):
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def __init__(self, connection, uri):
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Database.__init__(self, connection, uri)
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def connectorsFactory(self, uri):
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return PostGisDBConnector(uri)
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def dataTablesFactory(self, row, db, schema=None):
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return PGTable(row, db, schema)
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def info(self):
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from .info_model import PGDatabaseInfo
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return PGDatabaseInfo(self)
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def vectorTablesFactory(self, row, db, schema=None):
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return PGVectorTable(row, db, schema)
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def rasterTablesFactory(self, row, db, schema=None):
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return PGRasterTable(row, db, schema)
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def schemasFactory(self, row, db):
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return PGSchema(row, db)
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def sqlResultModel(self, sql, parent):
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from .data_model import PGSqlResultModel
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return PGSqlResultModel(self, sql, parent)
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def registerDatabaseActions(self, mainWindow):
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Database.registerDatabaseActions(self, mainWindow)
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# add a separator
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separator = QAction(self)
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separator.setSeparator(True)
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mainWindow.registerAction(separator, self.tr("&Table"))
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action = QAction(self.tr("Run &Vacuum Analyze"), self)
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mainWindow.registerAction(action, self.tr("&Table"), self.runVacuumAnalyzeActionSlot)
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action = QAction(self.tr("Run &Refresh Materialized View"), self)
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mainWindow.registerAction(action, self.tr("&Table"), self.runRefreshMaterializedViewSlot)
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def runVacuumAnalyzeActionSlot(self, item, action, parent):
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QApplication.restoreOverrideCursor()
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try:
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if not isinstance(item, Table) or item.isView:
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parent.infoBar.pushMessage(self.tr("Select a table for vacuum analyze."), QgsMessageBar.INFO,
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parent.iface.messageTimeout())
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return
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finally:
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QApplication.setOverrideCursor(Qt.WaitCursor)
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item.runVacuumAnalyze()
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def runRefreshMaterializedViewSlot(self, item, action, parent):
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QApplication.restoreOverrideCursor()
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try:
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if not isinstance(item, PGTable) or item._relationType != 'm':
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parent.infoBar.pushMessage(self.tr("Select a materialized view for refresh."), QgsMessageBar.INFO,
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parent.iface.messageTimeout())
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return
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finally:
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QApplication.setOverrideCursor(Qt.WaitCursor)
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item.runRefreshMaterializedView()
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def hasLowercaseFieldNamesOption(self):
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return True
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class PGSchema(Schema):
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def __init__(self, row, db):
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Schema.__init__(self, db)
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self.oid, self.name, self.owner, self.perms, self.comment = row
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class PGTable(Table):
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def __init__(self, row, db, schema=None):
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Table.__init__(self, db, schema)
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self.name, schema_name, self._relationType, self.owner, self.estimatedRowCount, self.pages, self.comment = row
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self.isView = self._relationType in set(['v', 'm'])
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self.estimatedRowCount = int(self.estimatedRowCount)
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def runVacuumAnalyze(self):
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self.aboutToChange.emit()
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self.database().connector.runVacuumAnalyze((self.schemaName(), self.name))
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# TODO: change only this item, not re-create all the tables in the schema/database
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self.schema().refresh() if self.schema() else self.database().refresh()
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def runRefreshMaterializedView(self):
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self.aboutToChange.emit()
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self.database().connector.runRefreshMaterializedView((self.schemaName(), self.name))
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# TODO: change only this item, not re-create all the tables in the schema/database
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self.schema().refresh() if self.schema() else self.database().refresh()
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def runAction(self, action):
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action = str(action)
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if action.startswith("vacuumanalyze/"):
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if action == "vacuumanalyze/run":
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self.runVacuumAnalyze()
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return True
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elif action.startswith("rule/"):
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parts = action.split('/')
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rule_name = parts[1]
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rule_action = parts[2]
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msg = self.tr(u"Do you want to {0} rule {1}?").format(rule_action, rule_name)
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QApplication.restoreOverrideCursor()
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try:
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if QMessageBox.question(None, self.tr("Table rule"), msg,
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QMessageBox.Yes | QMessageBox.No) == QMessageBox.No:
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return False
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finally:
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QApplication.setOverrideCursor(Qt.WaitCursor)
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if rule_action == "delete":
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self.aboutToChange.emit()
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self.database().connector.deleteTableRule(rule_name, (self.schemaName(), self.name))
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self.refreshRules()
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return True
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elif action.startswith("refreshmaterializedview/"):
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if action == "refreshmaterializedview/run":
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self.runRefreshMaterializedView()
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return True
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return Table.runAction(self, action)
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def tableFieldsFactory(self, row, table):
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return PGTableField(row, table)
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def tableConstraintsFactory(self, row, table):
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return PGTableConstraint(row, table)
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def tableIndexesFactory(self, row, table):
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return PGTableIndex(row, table)
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def tableTriggersFactory(self, row, table):
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return PGTableTrigger(row, table)
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def tableRulesFactory(self, row, table):
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return PGTableRule(row, table)
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def info(self):
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from .info_model import PGTableInfo
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return PGTableInfo(self)
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def tableDataModel(self, parent):
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from .data_model import PGTableDataModel
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return PGTableDataModel(self, parent)
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def delete(self):
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self.aboutToChange.emit()
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if self.isView:
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ret = self.database().connector.deleteView((self.schemaName(), self.name), self._relationType == 'm')
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else:
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ret = self.database().connector.deleteTable((self.schemaName(), self.name))
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if not ret:
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self.deleted.emit()
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return ret
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class PGVectorTable(PGTable, VectorTable):
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def __init__(self, row, db, schema=None):
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PGTable.__init__(self, row[:-4], db, schema)
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VectorTable.__init__(self, db, schema)
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self.geomColumn, self.geomType, self.geomDim, self.srid = row[-4:]
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def info(self):
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from .info_model import PGVectorTableInfo
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return PGVectorTableInfo(self)
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def runAction(self, action):
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if PGTable.runAction(self, action):
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return True
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return VectorTable.runAction(self, action)
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class PGRasterTable(PGTable, RasterTable):
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def __init__(self, row, db, schema=None):
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PGTable.__init__(self, row[:-6], db, schema)
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RasterTable.__init__(self, db, schema)
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self.geomColumn, self.pixelType, self.pixelSizeX, self.pixelSizeY, self.isExternal, self.srid = row[-6:]
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self.geomType = 'RASTER'
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def info(self):
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from .info_model import PGRasterTableInfo
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return PGRasterTableInfo(self)
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def gdalUri(self, uri=None):
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if not uri:
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uri = self.database().uri()
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service = (u'service=%s' % uri.service()) if uri.service() else ''
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schema = (u'schema=%s' % self.schemaName()) if self.schemaName() else ''
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dbname = (u'dbname=%s' % uri.database()) if uri.database() else ''
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host = (u'host=%s' % uri.host()) if uri.host() else ''
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user = (u'user=%s' % uri.username()) if uri.username() else ''
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passw = (u'password=%s' % uri.password()) if uri.password() else ''
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port = (u'port=%s' % uri.port()) if uri.port() else ''
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if not dbname:
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# GDAL postgisraster driver *requires* ad dbname
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# See: https://trac.osgeo.org/gdal/ticket/6910
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# TODO: cache this ?
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connector = self.database().connector
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r = connector._execute(None, "SELECT current_database()")
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dbname = (u'dbname=%s' % connector._fetchone(r)[0])
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connector._close_cursor(r)
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# Find first raster field
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col = ''
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for fld in self.fields():
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if fld.dataType == "raster":
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col = u'column=%s' % fld.name
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break
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gdalUri = u'PG: %s %s %s %s %s %s mode=2 %s %s table=%s' % \
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(service, dbname, host, user, passw, port, schema, col, self.name)
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return gdalUri
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def mimeUri(self):
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# QGIS has no provider for PGRasters, let's use GDAL
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uri = u"raster:gdal:%s:%s" % (self.name, re.sub(":", "\:", self.gdalUri()))
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return uri
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def toMapLayer(self):
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from qgis.core import QgsRasterLayer, QgsContrastEnhancement, QgsDataSourceUri, QgsCredentials
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rl = QgsRasterLayer(self.gdalUri(), self.name)
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if not rl.isValid():
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err = rl.error().summary()
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uri = QgsDataSourceUri(self.database().uri())
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conninfo = uri.connectionInfo(False)
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username = uri.username()
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password = uri.password()
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for i in range(3):
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(ok, username, password) = QgsCredentials.instance().get(conninfo, username, password, err)
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if ok:
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uri.setUsername(username)
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uri.setPassword(password)
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rl = QgsRasterLayer(self.gdalUri(uri), self.name)
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if rl.isValid():
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break
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if rl.isValid():
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rl.setContrastEnhancement(QgsContrastEnhancement.StretchToMinimumMaximum)
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return rl
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class PGTableField(TableField):
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def __init__(self, row, table):
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TableField.__init__(self, table)
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self.num, self.name, self.dataType, self.charMaxLen, self.modifier, self.notNull, self.hasDefault, self.default, typeStr = row
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self.primaryKey = False
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# get modifier (e.g. "precision,scale") from formatted type string
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trimmedTypeStr = typeStr.strip()
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regex = QRegExp("\((.+)\)$")
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startpos = regex.indexIn(trimmedTypeStr)
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if startpos >= 0:
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self.modifier = regex.cap(1).strip()
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else:
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self.modifier = None
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# find out whether fields are part of primary key
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for con in self.table().constraints():
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if con.type == TableConstraint.TypePrimaryKey and self.num in con.columns:
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self.primaryKey = True
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break
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class PGTableConstraint(TableConstraint):
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def __init__(self, row, table):
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TableConstraint.__init__(self, table)
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self.name, constr_type_str, self.isDefferable, self.isDeffered, columns = row[:5]
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self.columns = list(map(int, columns.split(' ')))
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if constr_type_str in TableConstraint.types:
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self.type = TableConstraint.types[constr_type_str]
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else:
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self.type = TableConstraint.TypeUnknown
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if self.type == TableConstraint.TypeCheck:
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self.checkSource = row[5]
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elif self.type == TableConstraint.TypeForeignKey:
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self.foreignTable = row[6]
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self.foreignOnUpdate = TableConstraint.onAction[row[7]]
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self.foreignOnDelete = TableConstraint.onAction[row[8]]
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self.foreignMatchType = TableConstraint.matchTypes[row[9]]
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self.foreignKeys = row[10]
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class PGTableIndex(TableIndex):
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def __init__(self, row, table):
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TableIndex.__init__(self, table)
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self.name, columns, self.isUnique = row
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self.columns = list(map(int, columns.split(' ')))
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class PGTableTrigger(TableTrigger):
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def __init__(self, row, table):
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TableTrigger.__init__(self, table)
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self.name, self.function, self.type, self.enabled = row
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class PGTableRule(TableRule):
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def __init__(self, row, table):
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TableRule.__init__(self, table)
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self.name, self.definition = row
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