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"""
***************************************************************************
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"
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.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.Flag.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 groupId(self):
return "vectormiscellaneous"
def commandName(self):
return "ogr2ogr"
def getConsoleCommands(self, parameters, context, feedback, executing=True):
input_details = self.getOgrCompatibleSource(
self.INPUT, parameters, context, feedback, executing
)
sql = self.parameterAsString(parameters, self.SQL, context)
options = self.parameterAsString(parameters, self.OPTIONS, context)
outFile = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
self.setOutputValue(self.OUTPUT, outFile)
output_details = GdalUtils.gdal_connection_details_from_uri(outFile, context)
if not sql:
raise QgsProcessingException(
self.tr("Empty SQL. Please enter valid SQL expression and try again.")
)
arguments = [
output_details.connection_string,
input_details.connection_string,
"-sql",
sql,
]
dialect = self.dialects[
self.parameterAsEnum(parameters, self.DIALECT, context)
][1]
if dialect:
arguments.append("-dialect")
arguments.append(dialect)
if input_details.open_options:
arguments.extend(input_details.open_options_as_arguments())
if input_details.credential_options:
arguments.extend(input_details.credential_options_as_arguments())
if options:
arguments.append(options)
if output_details.format:
arguments.append(f"-f {output_details.format}")
return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
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