मेरे पास एक काफी जटिल क्वेरी है जो अपने आप ही कुछ ही सेकंड में चलती है, लेकिन जब एक टेबल-वैल्यू फ़ंक्शन में लपेटा जाता है, तो यह बहुत धीमा होता है; मैंने वास्तव में इसे खत्म नहीं होने दिया है, लेकिन यह बिना खत्म हुए दस मिनट तक चलता है। एकमात्र परिवर्तन दिनांक पैरामीटर के साथ दो दिनांक चर (दिनांक शाब्दिक के साथ आरंभिक) की जगह ले रहा है:
सेवन सेकंड्स में चलता है
DECLARE @StartDate DATE = '2011-05-21'
DECLARE @EndDate DATE = '2011-05-23'
DECLARE @Data TABLE (...)
INSERT INTO @Data(...) SELECT...
SELECT * FROM @Data
कम से कम दस मिनट के लिए चलाता है
CREATE FUNCTION X (@StartDate DATE, @EndDate DATE)
RETURNS TABLE AS RETURN
SELECT ...
SELECT * FROM X ('2011-05-21', '2011-05-23')
मैंने पहले फ़ंक्शन को RETURNS @Data TABLE (...) क्लॉज़ के साथ मल्टी-स्टेटमेंट TVF के रूप में लिखा था, लेकिन इनलाइन संरचना के लिए स्वैपिंग ने ध्यान देने योग्य परिवर्तन नहीं किया है। टीवीएफ का लंबा समय वास्तविक SELECT * FROM X
समय है; वास्तव में यूडीएफ बनाने में कुछ सेकंड लगते हैं।
मैं प्रश्न में प्रश्न पोस्ट कर सकता था, लेकिन यह थोड़ा लंबा है (~ 165 लाइनें) और, पहले दृष्टिकोण की सफलता के आधार पर, मुझे संदेह है कि कुछ और चल रहा है। निष्पादन योजनाओं के माध्यम से स्किमिंग, वे समान प्रतीत होते हैं।
मैंने बदलाव के बिना क्वेरी को छोटे वर्गों में तोड़ने की कोशिश की है। अकेले निष्पादित होने पर कोई भी एकल खंड कुछ सेकंड से अधिक नहीं लेता है, लेकिन टीवीएफ अभी भी लटका हुआ है।
मैं एक बहुत ही समान प्रश्न देखता हूं, /programming/4190506/sql-server-2005-table-valued-function-weird-performance , लेकिन मुझे यकीन नहीं है कि समाधान लागू होता है। शायद किसी ने इस समस्या को देखा है और एक अधिक सामान्य समाधान जानता है? धन्यवाद!
प्रसंस्करण के कई मिनट बाद यहाँ dm_exec_requests है:
session_id 59
request_id 0
start_time 40688.46517
status running
command UPDATE
sql_handle 0x030015002D21AF39242A1101ED9E00000000000000000000
statement_start_offset 10962
statement_end_offset 16012
plan_handle 0x050015002D21AF3940C1E6B0040000000000000000000000
database_id 21
user_id 1
connection_id 314AE0E4-A1FB-4602-BF40-02D857BAD6CF
blocking_session_id 0
wait_type NULL
wait_time 0
last_wait_type SOS_SCHEDULER_YIELD
wait_resource
open_transaction_count 0
open_resultset_count 1
transaction_id 48030651
context_info 0x
percent_complete 0
estimated_completion_time 0
cpu_time 344777
total_elapsed_time 348632
scheduler_id 7
task_address 0x000000045FC85048
reads 1549
writes 13
logical_reads 30331425
text_size 2147483647
language us_english
date_format mdy
date_first 7
quoted_identifier 1
arithabort 1
ansi_null_dflt_on 1
ansi_defaults 0
ansi_warnings 1
ansi_padding 1
ansi_nulls 1
concat_null_yields_null 1
transaction_isolation_level 2
lock_timeout -1
deadlock_priority 0
row_count 105
prev_error 0
nest_level 1
granted_query_memory 170
executing_managed_code 0
group_id 2
query_hash 0xBE6A286546AF62FC
query_plan_hash 0xD07630B947043AF0
यहाँ पूरी क्वेरी है:
CREATE FUNCTION Routine.MarketingDashboardECommerceBase (@StartDate DATE, @EndDate DATE)
RETURNS TABLE AS RETURN
WITH RegionsByCode AS (SELECT CountryCode, MIN(Region) AS Region FROM Staging.Volusion.MarketingRegions GROUP BY CountryCode)
SELECT
D.Date, Div.Division, Region.Region, C.Category1, C.Category2, C.Category3,
COALESCE(V.Visits, 0) AS Visits,
COALESCE(Dem.Demos, 0) AS Demos,
COALESCE(S.GrossStores, 0) AS GrossStores,
COALESCE(S.PaidStores, 0) AS PaidStores,
COALESCE(S.NetStores, 0) AS NetStores,
COALESCE(S.StoresActiveNow, 0) AS StoresActiveNow
-- This line causes the run time to climb from a few seconds to over an hour!
--COALESCE(V.Visits, 0) * COALESCE(ACS.AvgClickCost, GAAC.AvgAdCost, 0.00) AS TotalAdCost
-- This line alone does not inflate the run time
--ACS.AvgClickCost
-- This line is enough to increase the run time to at least a couple minutes
--GAAC.AvgAdCost
FROM
--Dates AS D
(SELECT SQLDate AS Date FROM Dates WHERE SQLDate BETWEEN @StartDate AND @EndDate) AS D
CROSS JOIN (SELECT 'UK' AS Division UNION SELECT 'US' UNION SELECT 'IN' UNION SELECT 'Unknown') AS Div
CROSS JOIN (SELECT Category1, Category2, Category3 FROM Routine.MarketingDashboardCampaignMap UNION SELECT 'Unknown', 'Unknown', 'Unknown') AS C
CROSS JOIN (SELECT DISTINCT Region FROM Staging.Volusion.MarketingRegions) AS Region
-- Visitors
LEFT JOIN
(
SELECT
V.Date,
CASE WHEN V.Country IN ('United Kingdom', 'Guernsey', 'Ireland', 'Jersey') THEN 'UK'
WHEN V.Country IN ('United States', 'Canada', 'Puerto Rico', 'U.S. Virgin Islands') THEN 'US'
ELSE 'IN' END AS Division,
COALESCE(MR.Region, 'Unknown') AS Region,
C.Category1, C.Category2, C.Category3,
SUM(V.Visits) AS Visits
FROM
RawData.GoogleAnalytics.Visits AS V
INNER JOIN Routine.MarketingDashboardCampaignMap AS C ON V.LandingPage = C.LandingPage AND V.Campaign = C.Campaign AND V.Medium = C.Medium AND V.Referrer = C.Referrer AND V.Source = C.Source
LEFT JOIN Staging.Volusion.MarketingRegions AS MR ON V.Country = MR.CountryName
WHERE
V.Date BETWEEN @StartDate AND @EndDate
GROUP BY
V.Date,
CASE WHEN V.Country IN ('United Kingdom', 'Guernsey', 'Ireland', 'Jersey') THEN 'UK'
WHEN V.Country IN ('United States', 'Canada', 'Puerto Rico', 'U.S. Virgin Islands') THEN 'US'
ELSE 'IN' END,
COALESCE(MR.Region, 'Unknown'), C.Category1, C.Category2, C.Category3
) AS V ON D.Date = V.Date AND Div.Division = V.Division AND Region.Region = V.Region AND C.Category1 = V.Category1 AND C.Category2 = V.Category2 AND C.Category3 = V.Category3
-- Demos
LEFT JOIN
(
SELECT
OD.SQLDate,
G.Division,
COALESCE(MR.Region, 'Unknown') AS Region,
COALESCE(C.Category1, 'Unknown') AS Category1,
COALESCE(C.Category2, 'Unknown') AS Category2,
COALESCE(C.Category3, 'Unknown') AS Category3,
SUM(D.Demos) AS Demos
FROM
Demos AS D
INNER JOIN Orders AS O ON D."Order" = O."Order"
INNER JOIN Dates AS OD ON O.OrderDate = OD.DateSerial
INNER JOIN MarketingSources AS MS ON D.Source = MS.Source
LEFT JOIN RegionsByCode AS MR ON MS.CountryCode = MR.CountryCode
LEFT JOIN
(
SELECT
G.TransactionID,
MIN (
CASE WHEN G.Country IN ('United Kingdom', 'Guernsey', 'Ireland', 'Jersey') THEN 'UK'
WHEN G.Country IN ('United States', 'Canada', 'Puerto Rico', 'U.S. Virgin Islands') THEN 'US'
ELSE 'IN' END
) AS Division
FROM
RawData.GoogleAnalytics.Geography AS G
WHERE
TransactionDate BETWEEN @StartDate AND @EndDate
AND NOT EXISTS (SELECT * FROM RawData.GoogleAnalytics.Geography AS G2 WHERE G.TransactionID = G2.TransactionID AND G2.EffectiveDate > G.EffectiveDate)
GROUP BY
G.TransactionID
) AS G ON O.VolusionOrderID = G.TransactionID
LEFT JOIN RawData.GoogleAnalytics.Referrers AS R ON O.VolusionOrderID = R.TransactionID AND NOT EXISTS (SELECT * FROM RawData.GoogleAnalytics.Referrers AS R2 WHERE R.TransactionID = R2.TransactionID AND R2.EffectiveDate > R.EffectiveDate)
LEFT JOIN Routine.MarketingDashboardCampaignMap AS C ON MS.LandingPage = C.LandingPage AND MS.Campaign = C.Campaign AND MS.Medium = C.Medium AND COALESCE(R.ReferralPath, '(not set)') = C.Referrer AND MS.SourceName = C.Source
WHERE
O.IsDeleted = 'No'
AND OD.SQLDate BETWEEN @StartDate AND @EndDate
GROUP BY
OD.SQLDate,
G.Division,
COALESCE(MR.Region, 'Unknown'),
COALESCE(C.Category1, 'Unknown'),
COALESCE(C.Category2, 'Unknown'),
COALESCE(C.Category3, 'Unknown')
) AS Dem ON D.Date = Dem.SQLDate AND Div.Division = Dem.Division AND Region.Region = Dem.Region AND C.Category1 = Dem.Category1 AND C.Category2 = Dem.Category2 AND C.Category3 = Dem.Category3
-- Stores
LEFT JOIN
(
SELECT
OD.SQLDate,
CASE WHEN O.VolusionCountryCode = 'GB' THEN 'UK'
WHEN A.CountryShortName IN ('U.S.', 'Canada', 'Puerto Rico', 'U.S. Virgin Islands') THEN 'US'
ELSE 'IN' END AS Division,
COALESCE(MR.Region, 'Unknown') AS Region,
COALESCE(CpM.Category1, 'Unknown') AS Category1,
COALESCE(CpM.Category2, 'Unknown') AS Category2,
COALESCE(CpM.Category3, 'Unknown') AS Category3,
SUM(S.Stores) AS GrossStores,
SUM(CASE WHEN O.DatePaid <> -1 THEN 1 ELSE 0 END) AS PaidStores,
SUM(CASE WHEN O.DatePaid <> -1 AND CD.WeekEnding <> OD.WeekEnding THEN 1 ELSE 0 END) AS NetStores,
SUM(CASE WHEN O.DatePaid <> -1 THEN SH.ActiveStores ELSE 0 END) AS StoresActiveNow
FROM
Stores AS S
INNER JOIN Orders AS O ON S."Order" = O."Order"
INNER JOIN Dates AS OD ON O.OrderDate = OD.DateSerial
INNER JOIN Dates AS CD ON O.CancellationDate = CD.DateSerial
INNER JOIN Customers AS C ON O.CustomerNow = C.Customer
INNER JOIN MarketingSources AS MS ON C.Source = MS.Source
INNER JOIN StoreHistory AS SH ON S.MostRecentHistory = SH.History
INNER JOIN Addresses AS A ON C.Address = A.Address
LEFT JOIN RegionsByCode AS MR ON MS.CountryCode = MR.CountryCode
LEFT JOIN Routine.MarketingDashboardCampaignMap AS CpM ON CpM.LandingPage = 'N/A' AND MS.Campaign = CpM.Campaign AND MS.Medium = CpM.Medium AND CpM.Referrer = 'N/A' AND MS.SourceName = CpM.Source
WHERE
O.IsDeleted = 'No'
AND OD.SQLDate BETWEEN @StartDate AND @EndDate
GROUP BY
OD.SQLDate,
CASE WHEN O.VolusionCountryCode = 'GB' THEN 'UK'
WHEN A.CountryShortName IN ('U.S.', 'Canada', 'Puerto Rico', 'U.S. Virgin Islands') THEN 'US'
ELSE 'IN' END,
COALESCE(MR.Region, 'Unknown'),
COALESCE(CpM.Category1, 'Unknown'),
COALESCE(CpM.Category2, 'Unknown'),
COALESCE(CpM.Category3, 'Unknown')
) AS S ON D.Date = S.SQLDate AND Div.Division = S.Division AND Region.Region = S.Region AND C.Category1 = S.Category1 AND C.Category2 = S.Category2 AND C.Category3 = S.Category3
-- Google Analytics spend
LEFT JOIN
(
SELECT
AC.Date, C.Category1, C.Category2, C.Category3, SUM(AC.AdCost) / SUM(AC.Visits) AS AvgAdCost
FROM
RawData.GoogleAnalytics.AdCosts AS AC
INNER JOIN
(
SELECT Campaign, Medium, Source, MIN(Category1) AS Category1, MIN(Category2) AS Category2, MIN(Category3) AS Category3
FROM Routine.MarketingDashboardCampaignMap
WHERE Category1 <> 'Affiliate'
GROUP BY Campaign, Medium, Source
) AS C ON AC.Campaign = C.Campaign AND AC.Medium = C.Medium AND AC.Source = C.Source
WHERE
AC.Date BETWEEN @StartDate AND @EndDate
GROUP BY
AC.Date, C.Category1, C.Category2, C.Category3
HAVING
SUM(AC.AdCost) > 0.00 AND SUM(AC.Visits) > 0
) AS GAAC ON D.Date = GAAC.Date AND C.Category1 = GAAC.Category1 AND C.Category2 = GAAC.Category2 AND C.Category3 = GAAC.Category3
-- adCenter spend
LEFT JOIN
(
SELECT Date, SUM(Spend) / SUM(Clicks) AS AvgClickCost
FROM RawData.AdCenter.Spend
WHERE Date BETWEEN @StartDate AND @EndDate
GROUP BY Date
HAVING SUM(Spend) > 0.00 AND SUM(Clicks) > 0
) AS ACS ON D.Date = ACS.Date AND C.Category1 = 'PPC' AND C.Category2 = 'adCenter' AND C.Category3 = 'N/A'
WHERE
V.Visits > 0 OR Dem.Demos > 0 OR S.GrossStores > 0
GO
SELECT * FROM Routine.MarketingDashboardECommerceBase('2011-05-21', '2011-05-23')