2 つのクエリがあります。
クエリ # 1: 一部のデータを一時テーブルに挿入します
クエリ # 2: 一時テーブル (いくつかの結合を含む) からのデータを新しいテーブルに挿入します。
クエリ #1 だけを実行すると、3 秒かかります。クエリ #2 だけを実行すると、12 秒かかります。
両方を 1 つの実行として一緒に実行すると、永久に (4 分以上) 実行されます。
この理由として何が考えられるでしょうか？
(私は自分のコードを投稿しますが、非常に長く、部外者にはあまり理解できません。)
これが私のSQLです（自己責任で）：単独で実行した場合は正常に実行されることに注意してください。
-- START QUERY #1
SELECT * INTO #TempProdForSiteGoingTrim
FROM
(
SELECT
p.idProduct
, p.active
, p.sku
, p.description
, p.listprice
, p.price
, p.imageurl
, p.smallimageurl
, p.idManufacturer
, sortOrder
, CASE WHEN p.pgroup = '' OR p.pgroup IS NULL THEN CAST(p.idProduct AS VARCHAR) ELSE pgroup END [pgroup]
, CASE WHEN pa2.attr IS NULL THEN CAST(p.idProduct AS VARCHAR) ELSE CASE WHEN p.pgroup = '' OR p.pgroup IS NULL THEN CAST(p.idProduct AS VARCHAR) ELSE pgroup END END [RugGroup]
, pa1.attr [Color]
, pa3.attr [Collection]
, pa2.attr [RugSize]
, pa4.attr[RugShape]
FROM
(SELECT DISTINCT idProduct FROM ProdSite WHERE idSite = 39 ) s
INNER JOIN (SELECT * FROM products p WHERE active = -1 ) p ON s.idproduct = p.idproduct
LEFT OUTER JOIN (SELECT t.idproduct, attr FROM (SELECT max(idprodattr) [idprodattr], idproduct, b.idattrset FROM productattr a JOIN product_attr b on a.idattr = b.idattr WHERE idattrset = 1 GROUP BY a.idproduct, b.idattrset )t JOIN productattr a ON t.idprodattr = a.idprodattr JOIN product_attr b ON a.idattr = b.idattr) pa1 ON p.idproduct = pa1.idproduct
LEFT OUTER JOIN (SELECT t.idproduct, attr FROM (SELECT max(idprodattr)[idprodattr], idproduct, b.idattrset FROM productattr a JOIN product_attr b on a.idattr = b.idattr WHERE idattrset = 160 GROUP BY a.idproduct, b.idattrset )t JOIN productattr a ON t.idprodattr = a.idprodattr JOIN product_attr b ON a.idattr = b.idattr) pa2 ON p.idproduct = pa2.idproduct
LEFT OUTER JOIN (SELECT t.idproduct, attr FROM (SELECT max(idprodattr)[idprodattr], idproduct, b.idattrset FROM productattr a JOIN product_attr b on a.idattr = b.idattr WHERE idattrset = 6 GROUP BY a.idproduct, b.idattrset )t JOIN productattr a ON t.idprodattr = a.idprodattr JOIN product_attr b ON a.idattr = b.idattr) pa3 ON p.idproduct = pa3.idproduct
LEFT OUTER JOIN (SELECT t.idproduct, attr FROM (SELECT max(idprodattr)[idprodattr], idproduct, b.idattrset FROM productattr a JOIN product_attr b on a.idattr = b.idattr WHERE idattrset = 62 GROUP BY a.idproduct, b.idattrset )t JOIN productattr a ON t.idprodattr = a.idprodattr JOIN product_attr b ON a.idattr = b.idattr) pa4 ON p.idproduct = pa4.idproduct
)t
-- END QUERY #1
-- START QUERY #2
DECLARE @listRugSizes TABLE (idmanufacturer int, RugGroup VARCHAR(500), RugSizes VARCHAR(1000))
INSERT INTO @listRugSizes
SELECT
t1.idmanufacturer
, t1.RugGroup
, STUFF(( SELECT ', ' + RugSize FROM #TempProdForSiteGoingTrim t2 WHERE t2.RugGroup = t1.RugGroup and t2.idmanufacturer = t1.idmanufacturer FOR XML PATH(''), TYPE ).value('.', 'varchar(max)'), 1, 1, '') [Values]
FROM
#TempProdForSiteGoingTrim t1
GROUP BY
t1.RugGroup
, t1.idmanufacturer
INSERT INTO [NewTableForSiteGoingTrim]
SELECT
p.idProduct
, p.sku
, p.description
, p.listPrice
, p.price
, p.imageUrl
, p.smallImageUrl
, p.sortOrder
, p.idManufacturer
, p.pgroup
, p.ruggroup
, c.idCategory
, c.idCategory [fidcategory]
, c.idParentCategory
, c.idParentCategory [gidcategory]
, pc.idParentCategory [hidCategory]
, ppc.idParentCategory [iidCategory]
, m.Name
, rp.rewrite_key [rewrite_index]
, rm.rewrite_key [rewrite_key]
, color [Color]
, collection [Collection]
, rugsize [RugSize]
, ruggroup.rugcount
, ruggroup.maxprice
, ruggroup.minprice
, rs.RugSizes
, p.rugshape
FROM
#TempProdForSiteGoingTrim p
LEFT OUTER JOIN (
SELECT
MIN(c.idCategory) [idCategory]
, c.idProduct
FROM
(
SELECT
cp.idProduct
, cp.idCategory
FROM
dbo.categories_products cp
JOIN categories c ON cp.idcategory = c.idCategory
WHERE
c.idSite = 24
) c
GROUP BY
c.idProduct
) cp ON p.idProduct = cp.idProduct
LEFT OUTER JOIN categories c ON cp.idCategory = c.idCategory
LEFT OUTER JOIN categories pc ON c.idParentCategory = pc.idCategory
LEFT OUTER JOIN categories ppc ON pc.idParentCategory = ppc.idCategory
LEFT OUTER JOIN manufacturer m ON p.idManufacturer = m.idManufacturer
LEFT OUTER JOIN (SELECT * FROM rewrite WHERE type = 3) rm ON p.idManufacturer = rm.id
LEFT OUTER JOIN (SELECT * FROM rewrite WHERE type = 1) rp ON p.idProduct = rp.id
LEFT OUTER JOIN @listRugSizes rs ON p.RugGroup = rs.RugGroup and p.idmanufacturer = rs.idmanufacturer
LEFT OUTER JOIN
(
SELECT
p.ruggroup
, p.idmanufacturer
, min(price) [minPrice]
, count(*) [RugCount]
, m.maxprice
FROM
#TempProdForSiteGoingTrim p
LEFT OUTER JOIN
(
SELECT
r.ruggroup
, r.idmanufacturer
, max(price) [maxprice]
FROM
#TempProdForSiteGoingTrim r
WHERE
r.idproduct = (SELECT MAX(idproduct) FROM #TempProdForSiteGoingTrim WHERE ruggroup = r.ruggroup AND price = r.price and idmanufacturer = r.idmanufacturer)
GROUP BY
ruggroup
, idmanufacturer
) m ON p.ruggroup = m.ruggroup and p.idmanufacturer = m.idmanufacturer
GROUP BY
p.ruggroup
, m.maxprice
, p.idmanufacturer
) ruggroup ON p.ruggroup = ruggroup.ruggroup and p.idmanufacturer = ruggroup.idmanufacturer
-- END QUERY #2
編集
最後の結合「ruggroup」をグループのみに変更し、「ruggroup」と「idmanufacturer」ではなく列「ruggroup」で結合すると、正常に動作します。