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