<?php 
use App\Models\PaintFollowUp;
use App\Models\LineList;
use Illuminate\Support\Facades\DB;

// Method 1: Using join which is more efficient than subquery
$deletedCount = DB::table('paint_follow_ups')
    ->join('line_lists', 'paint_follow_ups.line', '=', 'line_lists.line_no')
    ->where(function($query) {
        $query->whereNull('line_lists.painting_cycle')
              ->orWhere('line_lists.painting_cycle', '');
    });

    if(isset($lineNumber)){
        $deletedCount = $deletedCount->where('paint_follow_ups.line', $lineNumber);
    }

    $deletedCount = $deletedCount->delete();

Log::debug("$deletedCount rows deleted from paint_follow_ups table");
?>