mysql - サブクエリがNULLを返すかどうかをMySQLがチェックしてから、値を置き換えます

Question

サブクエリが結果または null 値を返さない場合、WHERE 句の値を置き換える必要がある mysql クエリがあります。

必要に応じて機能する価格クエリ

正常に実行されます

SELECT `prices` FROM `pricing`
WHERE (3 BETWEEN `from_unit` AND `to_unit`)
AND `type` = 1
AND `id_pricing` IN 
    (   
        SELECT v1.`id_pricing` FROM `values` AS v1
        INNER JOIN `values` AS v2 ON v1.`id_pricing` = v2.`id_pricing`
        INNER JOIN `values` AS v3 ON v1.`id_pricing` = v3.`id_pricing`
        INNER JOIN `values` AS v4 ON v1.`id_pricing` = v4.`id_pricing`
        WHERE v1.`id_attribute` = 1 AND v1.`id_value` = 1
        AND v2.`id_attribute` = 7 AND v2.`id_value` = 63
        AND v3.`id_attribute` = 8 AND v3.`id_value` = 87
        AND v4.`id_attribute` = 12 AND v4.`id_value` = 143  
    )

このクエリを次のように変更し、IN 句内のサブクエリに IFNULL チェックを追加すると、エラーがスローされます

「SQL エラー (1242): サブクエリが複数の行を返しました」

SELECT `prices` FROM `pricing`
WHERE (3 BETWEEN `from_unit` AND `to_unit`)
AND `type` = 1
AND `id_pricing` IN 
    (   IFNULL  (
                    (   SELECT v1.`id_pricing` FROM `values` AS v1
                        INNER JOIN `values` AS v2 ON v1.`id_pricing` = v2.`id_pricing`
                        INNER JOIN `values` AS v3 ON v1.`id_pricing` = v3.`id_pricing`
                        INNER JOIN `values` AS v4 ON v1.`id_pricing` = v4.`id_pricing`
                        WHERE v1.`id_attribute` = 1 AND v1.`id_value` = 1
                        AND v2.`id_attribute` = 7 AND v2.`id_value` = 63
                        AND v3.`id_attribute` = 8 AND v3.`id_value` = 87
                        AND v4.`id_attribute` = 12 AND v4.`id_value` = 143
                    ),  
                    '1234'
                )
    )

IFNULL を COALESCE に置き換えてみましたが、結果は同じです。間違った構文を使用していますか?