[processing] restore Execure SQL algorithm

python/plugins/processing/algs/gdal/Dissolve.py

@@ -95,8 +95,7 @@ def initAlgorithm(self, config=None):
             self.addParameter(param)
 
         self.addParameter(QgsProcessingParameterVectorDestination(self.OUTPUT,
-                                                                  self.tr('Buffer'),
-                                                                  QgsProcessing.TypeVectorPolygon))
+                                                                  self.tr('Dissolved')))
 
     def name(self):
         return 'dissolve'

python/plugins/processing/algs/gdal/ExecuteSql.py

@@ -0,0 +1,117 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    ExecuteSql.py
+    ---------------------
+    Date                 : November 2012
+    Copyright            : (C) 2012 by Victor Olaya
+    Email                : volayaf at gmail dot 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.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Victor Olaya'
+__date__ = 'November 2012'
+__copyright__ = '(C) 2012, Victor Olaya'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+
+from qgis.core import (QgsProcessingException,
+                       QgsProcessingParameterDefinition,
+                       QgsProcessingParameterFeatureSource,
+                       QgsProcessingParameterEnum,
+                       QgsProcessingParameterString,
+                       QgsProcessingParameterVectorDestination)
+from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
+from processing.algs.gdal.GdalUtils import GdalUtils
+
+
+class ExecuteSql(GdalAlgorithm):
+
+    INPUT = 'INPUT'
+    SQL = 'SQL'
+    DIALECT = 'DIALECT'
+    OPTIONS = 'OPTIONS'
+    OUTPUT = 'OUTPUT'
+
+    def __init__(self):
+        super().__init__()
+
+    def initAlgorithm(self, config=None):
+        self.dialects = ((self.tr('None'), ''),
+                         (self.tr('OGR SQL'), 'ogrsql'),
+                         (self.tr('SQLite'), 'sqlite'))
+
+        self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
+                                                              self.tr('Input layer')))
+        self.addParameter(QgsProcessingParameterString(self.SQL,
+                                                       self.tr('SQL expression'),
+                                                       defaultValue=''))
+        self.addParameter(QgsProcessingParameterEnum(self.SQL,
+                                                     self.tr('SQL expression'),
+                                                     defaultValue=''))
+        self.addParameter(QgsProcessingParameterEnum(self.DIALECT,
+                                                     self.tr('SQL dialect'),
+                                                     options=[i[0] for i in self.dialects],
+                                                     allowMultiple=False,
+                                                     defaultValue=0))
+
+        options_param = QgsProcessingParameterString(self.OPTIONS,
+                                                     self.tr('Additional creation options'),
+                                                     defaultValue='',
+                                                     optional=True)
+        options_param.setFlags(options_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
+        self.addParameter(options_param)
+
+        self.addParameter(QgsProcessingParameterVectorDestination(self.OUTPUT,
+                                                                  self.tr('SQL result')))
+
+    def name(self):
+        return 'executesql'
+
+    def displayName(self):
+        return self.tr('Execute SQL')
+
+    def group(self):
+        return self.tr('Vector miscellaneous')
+
+    def getConsoleCommands(self, parameters, context, feedback):
+        ogrLayer, layerName = self.getOgrCompatibleSource(self.INPUT, parameters, context, feedback)
+        sql = self.parameterAsString(parameters, self.SQL, context)
+        options = self.parameterAsString(parameters, self.OPTIONS, context)
+        outFile = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
+
+        output, outputFormat = GdalUtils.ogrConnectionStringAndFormat(outFile, context)
+
+        if not sql:
+            raise QgsProcessingException(
+                self.tr('Empty SQL. Please enter valid SQL expression and try again.'))
+
+        arguments = []
+        arguments.append(output)
+        arguments.append(ogrLayer)
+        arguments.append('-sql')
+        arguments.append(sql)
+
+        dialect = self.dialects[self.parameterAsEnum(parameters, self.DIALECT, context)][1]
+        if dialect:
+            arguments.append('-dialect')
+            arguments.append(dialect)
+
+        if options:
+            arguments.append(options)
+
+        if outputFormat:
+            arguments.append('-f {}'.format(outputFormat))
+
+        return ['ogr2ogr', GdalUtils.escapeAndJoin(arguments)]

python/plugins/processing/algs/gdal/GdalAlgorithmProvider.py

@@ -77,6 +77,7 @@
 from .ClipVectorByExtent import ClipVectorByExtent
 from .ClipVectorByMask import ClipVectorByMask
 from .Dissolve import Dissolve
+from .ExecuteSql import ExecuteSql
 from .OffsetCurve import OffsetCurve
 from .ogr2ogr import ogr2ogr
 from .ogrinfo import ogrinfo
@@ -86,7 +87,6 @@
 
 # from .ogr2ogrtopostgislist import Ogr2OgrToPostGisList
 # from .ogr2ogrtabletopostgislist import Ogr2OgrTableToPostGisList
-# from .ogrsql import OgrSql
 
 pluginPath = os.path.normpath(os.path.join(
     os.path.split(os.path.dirname(__file__))[0], os.pardir))
@@ -179,6 +179,7 @@ def loadAlgorithms(self):
             ClipVectorByExtent(),
             ClipVectorByMask(),
             Dissolve(),
+            ExecuteSql(),
             OffsetCurve(),
             ogr2ogr(),
             ogrinfo(),
@@ -187,7 +188,6 @@ def loadAlgorithms(self):
             PointsAlongLines(),
             # Ogr2OgrToPostGisList(),
             # Ogr2OgrTableToPostGisList(),
-            # OgrSql(),
         ]
         for a in self.algs:
             self.addAlgorithm(a)