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# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : DB Manager
Description : Database manager plugin for QGIS
Date : March 2015
copyright : (C) 2015 Hugo Mercier / Oslandia
email : hugo dot mercier at oslandia 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. *
* *
***************************************************************************/
Query builder dialog, based on the QSpatialite plugin (GPLv2+) by Romain Riviere
"""
from qgis.PyQt.QtCore import Qt, QObject, QEvent
from qgis.PyQt.QtWidgets import QDialog, QMessageBox, QTextEdit
from .ui.ui_DlgQueryBuilder import Ui_DbManagerQueryBuilderDlg as Ui_Dialog
from .db_plugins.plugin import VectorTable
class FocusEventFilter(QObject):
def __init__(self, parent):
QObject.__init__(self, parent)
self.focus = ''
def eventFilter(self, obj, event):
if event.type() == QEvent.FocusIn:
self.focus = obj.objectName()
return QObject.eventFilter(self, obj, event)
def insertWithSelection(widget, text):
if widget.textCursor().hasSelection(): # user has selectedsomething...
selection = widget.textCursor().selectedText()
widget.insertPlainText(text + selection + ")")
else:
widget.insertPlainText(text)
def insertWithSelectionOn(parent, objectname, text):
"""Insert the text in a QTextEdit given by its objectname"""
w = parent.findChild(QTextEdit, objectname)
insertWithSelection(w, text)
class QueryBuilderDlg(QDialog):
# object used to store parameters between invocations
saveParameter = None
def __init__(self, iface, db, parent=None, reset=False):
QDialog.__init__(self, parent)
self.iface = iface
self.db = db
self.query = ''
self.ui = Ui_Dialog()
self.ui.setupUi(self)
self.ui.group.setMaximumHeight(self.ui.tab.sizeHint().height())
self.ui.order.setMaximumHeight(self.ui.tab.sizeHint().height())
self.evt = FocusEventFilter(self)
self.ui.col.installEventFilter(self.evt)
self.ui.where.installEventFilter(self.evt)
self.ui.group.installEventFilter(self.evt)
self.ui.order.installEventFilter(self.evt)
d = self.db.connector.getQueryBuilderDictionary()
#Application default parameters
self.table = None
self.col_col = []
self.col_where = []
self.coltables = []
self.ui.extract.setChecked(True)
#ComboBox default values
self.ui.functions.insertItems(1, d['function'])
self.ui.math.insertItems(1, d['math'])
self.ui.aggregates.insertItems(1, d['aggregate'])
self.ui.operators.insertItems(1, d['operator'])
self.ui.stringfct.insertItems(1, d['string'])
#self.ui.Rtree.insertItems(1,rtreecommand)
# restore last query if needed
if reset:
QueryBuilderDlg.saveParameter = None
if QueryBuilderDlg.saveParameter is not None:
self.restoreLastQuery()
#Show Tables
self.show_tables()
#Signal/slot
self.ui.aggregates.currentIndexChanged.connect(self.add_aggregate)
self.ui.stringfct.currentIndexChanged.connect(self.add_stringfct)
self.ui.operators.currentIndexChanged.connect(self.add_operators)
self.ui.functions.currentIndexChanged.connect(self.add_functions)
self.ui.math.currentIndexChanged.connect(self.add_math)
self.ui.tables.currentIndexChanged.connect(self.add_tables)
self.ui.tables.currentIndexChanged.connect(self.list_cols)
self.ui.columns.currentIndexChanged.connect(self.add_columns)
self.ui.columns_2.currentIndexChanged.connect(self.list_values)
self.ui.reset.clicked.connect(self.reset)
self.ui.extract.stateChanged.connect(self.list_values)
self.ui.values.doubleClicked.connect(self.query_item)
self.ui.buttonBox.accepted.connect(self.validate)
self.ui.checkBox.stateChanged.connect(self.show_tables)
if self.db.explicitSpatialIndex():
self.tablesGeo = [table for table in self.tables if isinstance(table, VectorTable)]
tablesGeo = ['"%s"."%s"' % (table.name, table.geomColumn) for table in self.tablesGeo]
self.ui.table_target.insertItems(1, tablesGeo)
self.idxTables = [table for table in self.tablesGeo if table.hasSpatialIndex()]
idxTables = ['"%s"."%s"' % (table.name, table.geomColumn) for table in self.idxTables]
self.ui.table_idx.insertItems(1, idxTables)
self.ui.usertree.clicked.connect(self.use_rtree)
else:
self.ui.toolBox.setItemEnabled(2, False)
def update_table_list(self):
self.tables = []
add_sys_tables = self.ui.checkBox.isChecked()
schemas = self.db.schemas()
if schemas is None:
self.tables = self.db.tables(None, add_sys_tables)
else:
for schema in schemas:
self.tables += self.db.tables(schema, add_sys_tables)
def show_tables(self):
self.update_table_list()
self.ui.tables.clear()
self.ui.tables.insertItems(0, ["Tables"])
self.ui.tables.insertItems(1, [t.name for t in self.tables])
def add_aggregate(self):
if self.ui.aggregates.currentIndex() <= 0:
return
ag = self.ui.aggregates.currentText()
insertWithSelection(self.ui.col, ag)
self.ui.aggregates.setCurrentIndex(0)
def add_functions(self):
if self.ui.functions.currentIndex() <= 0:
return
ag = self.ui.functions.currentText()
insertWithSelectionOn(self, self.evt.focus, ag)
self.ui.functions.setCurrentIndex(0)
def add_stringfct(self):
if self.ui.stringFct.currentIndex() <= 0:
return
ag = self.ui.stringfct.currentText()
insertWithSelectionOn(self, self.evt.focus, ag)
self.ui.stringfct.setCurrentIndex(0)
def add_math(self):
if self.ui.math.currentIndex() <= 0:
return
ag = self.ui.math.currentText()
insertWithSelectionOn(self, self.evt.focus, ag)
self.ui.math.setCurrentIndex(0)
def add_operators(self):
if self.ui.operators.currentIndex() <= 0:
return
ag = self.ui.operators.currentText()
if self.evt.focus == "where": # in where section
self.ui.where.insertPlainText(ag)
else:
self.ui.col.insertPlainText(ag)
self.ui.operators.setCurrentIndex(0)
def add_tables(self):
if self.ui.tables.currentIndex() <= 0:
return
ag = self.ui.tables.currentText()
#Retrieve Table Object from txt
tableObj = [table for table in self.tables if table.name.upper() == ag.upper()]
if len(tableObj) != 1:
return # No object with this name
self.table = tableObj[0]
if (ag in self.coltables): # table already use
response = QMessageBox.question(self, "Table already used", "Do you want to add table %s again?" % ag, QMessageBox.Yes | QMessageBox.No)
if response == QMessageBox.No:
return
ag = self.table.quotedName()
txt = self.ui.tab.text()
if (txt is None) or (txt in ("", " ")):
self.ui.tab.setText('%s' % ag)
else:
self.ui.tab.setText('%s, %s' % (txt, ag))
self.ui.tables.setCurrentIndex(0)
def add_columns(self):
if self.ui.columns.currentIndex() <= 0:
return
ag = self.ui.columns.currentText()
if self.evt.focus == "where": # in where section
if ag in self.col_where: # column already called in where section
response = QMessageBox.question(self, "Column already used in WHERE clause", "Do you want to add column %s again?" % ag, QMessageBox.Yes | QMessageBox.No)
if response == QMessageBox.No:
self.ui.columns.setCurrentIndex(0)
return
self.ui.where.insertPlainText(ag)
self.col_where.append(ag)
elif self.evt.focus == "col":
if ag in self.col_col: # column already called in col section
response = QMessageBox.question(self, "Column already used in COLUMNS section", "Do you want to add column %s again?" % ag, QMessageBox.Yes | QMessageBox.No)
if response == QMessageBox.No:
self.ui.columns.setCurrentIndex(0)
return
if len(self.ui.col.toPlainText().strip()) > 0:
self.ui.col.insertPlainText(",\n" + ag)
else:
self.ui.col.insertPlainText(ag)
self.col_col.append(ag)
elif self.evt.focus == "group":
if len(self.ui.group.toPlainText().strip()) > 0:
self.ui.group.insertPlainText(", " + ag)
else:
self.ui.group.insertPlainText(ag)
elif self.evt.focus == "order":
if len(self.ui.order.toPlainText().strip()) > 0:
self.ui.order.insertPlainText(", " + ag)
else:
self.ui.order.insertPlainText(ag)
self.ui.columns.setCurrentIndex(0)
def list_cols(self):
table = self.table
if (table is None):
return
if (table.name in self.coltables):
return
columns = ['"%s"."%s"' % (table.name, col.name) for col in table.fields()]
#add special '*' column:
columns = ['"%s".*' % table.name] + columns
self.coltables.append(table.name) # table columns have been listed
# first and second col combobox
end = self.ui.columns.count()
self.ui.columns.insertItems(end, columns)
self.ui.columns_2.insertItems(end, columns)
end = self.ui.columns.count()
self.ui.columns.insertSeparator(end)
self.ui.columns_2.insertSeparator(end)
def list_values(self):
if self.ui.columns_2.currentIndex() <= 0:
return
item = self.ui.columns_2.currentText()
#recover column and table:
column = item.split(".") # "table".'column'
table = column[0]
if column[1] == '*':
return
table = table[1:-1]
qtable = [t for t in self.tables if t.name.lower() == table.lower()][0].quotedName()
if self.ui.extract.isChecked():
limit = 10
else:
limit = None
model = self.db.columnUniqueValuesModel(item, qtable, limit)
self.ui.values.setModel(model)
def query_item(self, index):
value = index.data(Qt.EditRole)
if value is None:
queryWord = u'NULL'
elif isinstance(value, (int, float)):
queryWord = unicode(value)
else:
queryWord = self.db.connector.quoteString(value)
if queryWord.strip() != '':
self.ui.where.insertPlainText(u' ' + queryWord)
self.ui.where.setFocus()
def use_rtree(self):
idx = self.ui.table_idx.currentText()
if idx in (None, "", " ", "Table (with Spatial Index)"):
return
try:
tab_idx = idx.split(".")[0][1:-1] # remove "
col_idx = idx.split(".")[1][1:-1] # remove '
except:
QMessageBox.warning(self, "Use R-Tree", "All fields are necessary", QMessageBox.Cancel)
tgt = self.ui.table_target.currentText()
if tgt in (None, "", " ", "Table (Target)"):
return
tgt_tab = tgt.split('.')[0][1:-1]
tgt_col = tgt.split('.')[1][1:-1]
sql = ""
if self.ui.where.toPlainText() not in (None, "", " "):
sql += "\nAND"
sql += self.db.spatialIndexClause(tab_idx, col_idx, tgt_tab, tgt_col)
self.ui.where.insertPlainText(sql)
def reset(self):
#reset lists:
self.ui.values.setModel(None)
self.ui.columns_2.clear()
self.ui.columns.insertItems(0, ["Columns"])
self.ui.columns_2.insertItems(0, ["Columns"])
self.coltables = []
self.col_col = []
self.col_where = []
def validate(self):
query_col = unicode(self.ui.col.toPlainText())
query_table = unicode(self.ui.tab.text())
query_where = unicode(self.ui.where.toPlainText())
query_group = unicode(self.ui.group.toPlainText())
query_order = unicode(self.ui.order.toPlainText())
query = ""
if query_col.strip() != '':
query += "SELECT %s \nFROM %s" % (query_col, query_table)
if query_where.strip() != '':
query += "\nWHERE %s" % query_where
if query_group.strip() != '':
query += "\nGROUP BY %s" % query_group
if query_order.strip() != '':
query += "\nORDER BY %s" % query_order
if query == '':
return
self.query = query
saveParameter = {}
saveParameter["coltables"] = self.coltables
saveParameter["col_col"] = self.col_col
saveParameter["col_where"] = self.col_where
saveParameter["col"] = query_col
saveParameter["tab"] = query_table
saveParameter["where"] = query_where
saveParameter["group"] = query_group
saveParameter["order"] = query_order
QueryBuilderDlg.saveParameter = saveParameter
def restoreLastQuery(self):
self.update_table_list()
saveParameter = QueryBuilderDlg.saveParameter
self.coltables = saveParameter["coltables"]
self.col_col = saveParameter["col_col"]
self.col_where = saveParameter["col_where"]
self.ui.col.insertPlainText(saveParameter["col"])
self.ui.tab.setText(saveParameter["tab"])
self.ui.where.insertPlainText(saveParameter["where"])
self.ui.order.setPlainText(saveParameter["order"])
self.ui.group.setPlainText(saveParameter["group"])
#list previous colist:
for tablename in self.coltables:
#Retrieve table object from table name:
table = [table for table in self.tables if table.name.upper() == tablename.upper()]
if len(table) != 1:
break
table = table[0]
columns = ['"%s"."%s"' % (table.name, col.name) for col in table.fields()]
# first and second col combobox
end = self.ui.columns.count()
self.ui.columns.insertItems(end, columns)
self.ui.columns_2.insertItems(end, columns)
end = self.ui.columns.count()
self.ui.columns.insertSeparator(end)
self.ui.columns_2.insertSeparator(end)
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