diff --git a/python/plugins/processing/algs/gdal/ogr2ogrtopostgislist.py b/python/plugins/processing/algs/gdal/ogr2ogrtopostgislist.py
index 5a080d2b6a8..e661e0f2fb0 100644
--- a/python/plugins/processing/algs/gdal/ogr2ogrtopostgislist.py
+++ b/python/plugins/processing/algs/gdal/ogr2ogrtopostgislist.py
@@ -31,12 +31,15 @@ from qgis.core import (QgsProcessing,
                        QgsProcessingParameterBoolean,
                        QgsProcessingParameterProviderConnection,
                        QgsProcessingParameterDatabaseSchema,
-                       QgsProcessingParameterDatabaseTable)
+                       QgsProcessingParameterDatabaseTable,
+                       QgsProviderRegistry,
+                       QgsProcessingException,
+                       QgsProviderConnectionException,
+                       QgsDataSourceUri)
 
 from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
 from processing.algs.gdal.GdalUtils import GdalUtils
 
-from processing.tools.postgis import uri_from_name, GeoDB
 from processing.tools.system import isWindows
 
 
@@ -195,11 +198,16 @@ class Ogr2OgrToPostGisList(GdalAlgorithm):
         return 'vectormiscellaneous'
 
     def getConsoleCommands(self, parameters, context, feedback, executing=True):
-        connection = self.parameterAsConnectionName(parameters, self.DATABASE, context)
-        uri = uri_from_name(connection)
-        if executing:
-            # to get credentials input when needed
-            uri = GeoDB(uri=uri).uri
+        connection_name = self.parameterAsConnectionName(parameters, self.DATABASE, context)
+
+        # resolve connection details to uri
+        try:
+            md = QgsProviderRegistry.instance().providerMetadata('postgres')
+            conn = md.createConnection(connection_name)
+        except QgsProviderConnectionException:
+            raise QgsProcessingException(self.tr('Could not retrieve connection details for {}').format(connection_name))
+
+        uri = conn.uri()
 
         ogrLayer, layername = self.getOgrCompatibleSource(self.INPUT, parameters, context, feedback, executing)
         shapeEncoding = self.parameterAsString(parameters, self.SHAPE_ENCODING, context)
@@ -244,7 +252,7 @@ class Ogr2OgrToPostGisList(GdalAlgorithm):
         arguments.append('-f')
         arguments.append('PostgreSQL')
         arguments.append('PG:"')
-        for token in uri.connectionInfo(executing).split(' '):
+        for token in QgsDataSourceUri(uri).connectionInfo(executing).split(' '):
             arguments.append(token)
         arguments.append('active_schema={}'.format(schema or 'public'))
         arguments.append('"')
diff --git a/python/plugins/processing/algs/qgis/ImportIntoPostGIS.py b/python/plugins/processing/algs/qgis/ImportIntoPostGIS.py
index 46cce036489..bc87919fb5a 100644
--- a/python/plugins/processing/algs/qgis/ImportIntoPostGIS.py
+++ b/python/plugins/processing/algs/qgis/ImportIntoPostGIS.py
@@ -22,7 +22,6 @@ __date__ = 'October 2012'
 __copyright__ = '(C) 2012, Victor Olaya'
 
 from qgis.core import (QgsVectorLayerExporter,
-                       QgsSettings,
                        QgsFeatureSink,
                        QgsProcessing,
                        QgsProcessingException,
@@ -33,10 +32,13 @@ from qgis.core import (QgsVectorLayerExporter,
                        QgsProcessingParameterProviderConnection,
                        QgsProcessingParameterDatabaseSchema,
                        QgsProcessingParameterDatabaseTable,
-                       QgsWkbTypes)
+                       QgsWkbTypes,
+                       QgsProviderRegistry,
+                       QgsProviderConnectionException,
+                       QgsDataSourceUri,
+                       QgsAbstractDatabaseProviderConnection)
 
 from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
-from processing.tools import postgis
 
 
 class ImportIntoPostGIS(QgisAlgorithm):
@@ -117,8 +119,14 @@ class ImportIntoPostGIS(QgisAlgorithm):
         return self.tr('import,postgis,table,layer,into,copy').split(',')
 
     def processAlgorithm(self, parameters, context, feedback):
-        connection = self.parameterAsConnectionName(parameters, self.DATABASE, context)
-        db = postgis.GeoDB.from_name(connection)
+        connection_name = self.parameterAsConnectionName(parameters, self.DATABASE, context)
+
+        # resolve connection details to uri
+        try:
+            md = QgsProviderRegistry.instance().providerMetadata('postgres')
+            conn = md.createConnection(connection_name)
+        except QgsProviderConnectionException:
+            raise QgsProcessingException(self.tr('Could not retrieve connection details for {}').format(connection_name))
 
         schema = self.parameterAsSchema(parameters, self.SCHEMA, context)
         overwrite = self.parameterAsBoolean(parameters, self.OVERWRITE, context)
@@ -161,8 +169,11 @@ class ImportIntoPostGIS(QgisAlgorithm):
         if source.wkbType() == QgsWkbTypes.NoGeometry:
             geomColumn = None
 
-        uri = db.uri
-        uri.setDataSource(schema, table, geomColumn, '', primaryKeyField)
+        uri = QgsDataSourceUri(conn.uri())
+        uri.setSchema(schema)
+        uri.setTable(table)
+        uri.setKeyColumn(primaryKeyField)
+        uri.setGeometryColumn(geomColumn)
 
         if encoding:
             options['fileEncoding'] = encoding
@@ -191,13 +202,16 @@ class ImportIntoPostGIS(QgisAlgorithm):
                 self.tr('Error importing to PostGIS\n{0}').format(exporter.errorMessage()))
 
         if geomColumn and createIndex:
-            db.create_spatial_index(table, schema, geomColumn)
+            try:
+                options = QgsAbstractDatabaseProviderConnection.SpatialIndexOptions()
+                options.geometryColumnName = geomColumn
+                conn.createSpatialIndex(schema, table, options)
+            except QgsProviderConnectionException as e:
+                raise QgsProcessingException(self.tr('Error creating spatial index:\n{0}').format(e))
 
-        db.vacuum_analyze(table, schema)
+        try:
+            conn.vacuum(schema, table)
+        except QgsProviderConnectionException as e:
+            feedback.reportError(self.tr('Error vacuuming table:\n{0}').format(e))
 
         return {}
-
-    def dbConnectionNames(self):
-        settings = QgsSettings()
-        settings.beginGroup('/PostgreSQL/connections/')
-        return settings.childGroups()
diff --git a/python/plugins/processing/algs/qgis/PostGISExecuteSQL.py b/python/plugins/processing/algs/qgis/PostGISExecuteSQL.py
index ec60f05fe4b..ef767841bbc 100644
--- a/python/plugins/processing/algs/qgis/PostGISExecuteSQL.py
+++ b/python/plugins/processing/algs/qgis/PostGISExecuteSQL.py
@@ -24,10 +24,11 @@ __copyright__ = '(C) 2012, Victor Olaya, Carterix Geomatics'
 from qgis.core import (
     QgsProcessingException,
     QgsProcessingParameterString,
-    QgsProcessingParameterProviderConnection
+    QgsProcessingParameterProviderConnection,
+    QgsProviderRegistry,
+    QgsProviderConnectionException
 )
 from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
-from processing.tools import postgis
 
 
 class PostGISExecuteSQL(QgisAlgorithm):
@@ -64,13 +65,19 @@ class PostGISExecuteSQL(QgisAlgorithm):
         return self.tr('postgis,database').split(',')
 
     def processAlgorithm(self, parameters, context, feedback):
-        connection = self.parameterAsConnectionName(parameters, self.DATABASE, context)
-        db = postgis.GeoDB.from_name(connection)
+        connection_name = self.parameterAsConnectionName(parameters, self.DATABASE, context)
+
+        # resolve connection details to uri
+        try:
+            md = QgsProviderRegistry.instance().providerMetadata('postgres')
+            conn = md.createConnection(connection_name)
+        except QgsProviderConnectionException:
+            raise QgsProcessingException(self.tr('Could not retrieve connection details for {}').format(connection_name))
 
         sql = self.parameterAsString(parameters, self.SQL, context).replace('\n', ' ')
         try:
-            db._exec_sql_and_commit(str(sql))
-        except postgis.DbError as e:
-            raise QgsProcessingException(
-                self.tr('Error executing SQL:\n{0}').format(str(e)))
+            conn.executeSql(sql)
+        except QgsProviderConnectionException as e:
+            raise QgsProcessingException(self.tr('Error executing SQL:\n{0}').format(e))
+
         return {}