Qcompleter for QAbstractTableModel's All Columns in Qcombobox

I have a large dataset with 3 million rows and more than 5 columns, (increasing data day by day)

I want to get the row data by typing the text in Qcombobox(editable) with matching records highlited

What I have tried is:

from PyQt5.QtCore import QAbstractTableModel, QModelIndex, Qtfrom PyQt5.QtWidgets import (QApplication, QMainWindow, QComboBox, QAbstractItemView,QCompleter, QTableView, QLabel)import sysclass CustomCompleter(QCompleter):    def pathFromIndex(self, index):        sibling_index = index.sibling(index.row(), 0)        return super().pathFromIndex(sibling_index)class TableModel(QAbstractTableModel):    def __init__(self, data):        super().__init__()        self._data = data    def rowCount(self, parent=QModelIndex()):        return len(self._data)    def columnCount(self, parent=QModelIndex()):        return len(self._data[0])    def data(self, index, role=Qt.DisplayRole):        if role == Qt.DisplayRole:            return self._data[index.row()][index.column()]        return Noneclass MainWindow(QMainWindow):    def __init__(self, parent=None):        super(MainWindow, self).__init__()        self.label = QLabel(parent = self)        self.label.setGeometry(20,200, 250, 50)        w, h = 600, 480        self.setMinimumSize(w, h)        # using MySQLdb        # cur = db()        # q = 'select id, name_purchase, acchead, name_sale, quantity, edate, quality from dataTableB;'        # cur.execute(q)        # data_ = cur.fetchall()        # sample data for minimal reproducable code        self.data_ = (            (101, 'Robert James', 30, 'Robert Clark', '01-02-2024'),            (102, 'Jack William', 25, 'Hazel Mile', '12-03-2024'),            (103, 'Ivy Alexander', 30, 'Ellis', '01-04-2024'),            (101, 'John Mile', 30, 'Lily', '21-04-2024'),            (103, 'Edward George', 30, 'Arthur', '25-04-2024')        )        model = TableModel(self.data_)        self.combo = QComboBox(self)        self.combo.setGeometry(50,50, 250, 40)        self.combo.setEditable(True)        self.combo.setModel(model)        combo_view = QTableView(self.combo, selectionBehavior=QAbstractItemView.SelectRows)        combo_view.verticalHeader().setVisible(False)        self.combo.setView(combo_view)        self.combo.currentIndexChanged.connect(self.get_row)        completer_view = QTableView(self.combo, selectionBehavior=QAbstractItemView.SelectRows)        completer_view.verticalHeader().hide()        completer = CustomCompleter()        completer.setCaseSensitivity(False)        completer.setFilterMode(Qt.MatchContains)        completer.setModel(model)        completer.setCompletionColumn(0)        completer.setPopup(completer_view)        # completer.setModelSorting(QCompleter.CaseSensitivelySortedModel)        # completer.setCompletionMode(QCompleter.PopupCompletion)        # completer.popup().setMinimumWidth(w)        # completer.popup().setMinimumHeight(h)        self.combo.setCompleter(completer)    def get_row(self, n):        self.label.setText(str(n))        v_id = self.data_[n][0]        self.combo.setCurrentText(str(v_id))if __name__ == '__main__':    app = QApplication(sys.argv)    main = MainWindow()    main.show()    try:        sys.exit(app.exec_())    except SystemExit:        None

With this codeQcombobox show the data in tabular format but Qcompleter does not show any data (when typing in Qcombobox, no popup appears)

I want the Qcompleter to match the text from all columns and highlight the record.

The sample result image is here:Click me to see The Required Result