LaravelのDBをOracleからMariaDBに変更しようとしていますが、'dbms

前提・実現したいこと

LaravelのDBをOracleからMariaDBに変更しようとしていますが、'dbms_lob.INSTR'エラーが出ます。

発生している問題・エラーメッセージ

[2022-03-10 10:06:22] staging.ERROR: SQLSTATE[42000]: Syntax error or access violation: 1370 execute command denied to user '' for routine 'dbms_lob.INSTR' (SQL: select count(*) as aggregate from `bbs` where `bbs_id` = LB041 and `fu_id` = and `article_title` = Tu and `reg_date` >= 2022-03-10 10:04:22 and `wrt_ip` = 172.18.0.1 and exists (select `article_no`, `article_text` from `bbs_text` where `bbs`.`article_no` = `bbs_text`.`article_no` and DBMS_LOB.INSTR(bbs_text.article_text, Tu

該当のソースコード

QnaController.php
<?php

namespace App\Api\V1\Controllers\Forum;

use App\Api\V1\Controllers\BaseController;
use App\Api\V1\CustomException;
use App\Api\V1\Resources\Forum\Qna\CategoryCollection;
use App\Api\V1\Resources\Forum\Qna\ListCollection;
use App\Api\V1\Resources\Forum\Qna\ShowResource;
use App\Models\CategoryInfo;
use App\Models\Forum;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;

/**
 * 
 *
 * Class QnaController
 * @package App\Api\V1\Controllers\Forum
 */
class QnaController extends BaseController
{

    /**
     * 
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     * @throws \Throwable
     */
    public function store(Request $request)
    {
        $options = $this->categories()->resource;

        $request_data = $request->validate([
            'category_id' => [
                'required',
                Rule::in($options->pluck('catg_id')->toArray())
            ],
            'title' => 'required|string|max:100',
            'content' => 'required|string|max:500',
        ], [
            'category_id.required' => \LittlefoxLocalization::lang('api_qna_store_validate_fail_category_id_required_msg'),
            'category_id.in' => \LittlefoxLocalization::lang('api_qna_store_validate_fail_category_id_in_msg'),
            'title.required' => \LittlefoxLocalization::lang('api_qna_store_validate_fail_title_required_msg'),
            'title.string' => \LittlefoxLocalization::lang('api_qna_store_validate_fail_title_string_msg'),
            'title.max' => \LittlefoxLocalization::lang('api_qna_store_validate_fail_title_max_msg'),
            'content.required' => \LittlefoxLocalization::lang('api_qna_store_validate_fail_content_required_msg'),
            'content.string' => \LittlefoxLocalization::lang('api_qna_store_validate_fail_content_string_msg'),
            'content.max' => \LittlefoxLocalization::lang('api_qna_store_validate_fail_content_max_msg'),
        ]);

        $exists = Forum::where('bbs_id', config('api.forum.qna'))
            ->where('fu_id', auth()->id())
            ->where('article_title', $request_data['title'])
            ->where('reg_date', '>=', now()->subMinutes(2)->toDateTimeString())
            ->where('wrt_ip', $request->ip())
            ->whereHas('text', function ($query) use ($request_data) {
                $query->whereRaw('DBMS_LOB.INSTR('.$query->qualifyColumn('article_text').', ?) > 0', [Forum\Text::escapeText($request_data['content'])]);
            })
            ->count() > 0;

        if ($exists) {
            throw new CustomException(200, \LittlefoxLocalization::lang('api_forum_qna_store_already_registered_same_contents_msg'), 422);
        }

        \DB::transaction(function () use ($request_data) {
            $article = Forum::make([
                'bbs_id' => config('api.forum.qna'),
                'article_title' => $request_data['title'],
                'article_opt1' => $request_data['category_id'],
                'fu_id' => auth()->id(),
                'open_yn' => 'Y',
            ]);
            $article->saveOrFail();

            $forum_text = $article->text()->make(['article_text' => $request_data['content']]);
            $forum_text->saveOrFail();
        });

        return $this->responseOnlyMessage(\LittlefoxLocalization::lang('api_forum_qna_store_success_msg'));
    }
}