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Results for sargable
Search options questions only
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8
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1
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Sargable Queries
I'm a bit new to this, but my understanding of Sargable and Non-Sargable SQL is that the offending function is operating on the column and thus obstructing the index (assuming one is present) which leads …
- 183
9
votes
1
answer
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Is COALESCE sargable now?
One of my developers is arguing that COALESCE(column, default value) = default value is now sargable. Is that right?
I ran the following test, and think it implies that COALESCE is non-sargable. …
- 2,688
27
votes
5
answers
4k
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SARGable WHERE clause for two date columns
/*would be nice if it were sargable*/
WITH [x] AS ( SELECT
* ,
DATEDIFF(DAY, [s].[DateCol1], [s]. … [ddif] >= 48;
And of course, since we are not using constants, this code changes nothing, and is not even half SARGable. No fun. Same execution plan. …
43
votes
3
answers
23k
views
What does the word "SARGable" really mean?
SQL Server users use the term "sargable". I'm wondering if there is an objective implementation-agnostic timeless definition for "sargable." … Other References
What makes a SQL statement sargable? …
- 64.7k
1
vote
1
answer
348
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When are ORs considered non-sargable predicates
I was wondering if I could get a further explanation on non-sargable predicates concerning the OR. … From my understanding, not all ORs fall into the category of non-sargable predicates. I just want to understand more when an OR is considered a non-sargable predicate and when it's not. …
0
votes
0
answers
43
views
SARGABLE predicate must be in DNF. Why?
A sargable predicate is one of the form (or which can be put into the form) "column comparison-operator value". … Why exactly does being in DNF qualify a predicate to be a SARGABLE? Do the authors mean the following? …
- 207
1
vote
1
answer
134
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Is SARGable query the first thing to put in developers' minds?
Is SARGable query the first thing to put in developers' minds from a performance tuning perspective? … It's been a while that I work through this way, but I was just wondering if you guys have the same approach, considering Microsoft will not Make more functions SARGable. …
- 1,428
7
votes
1
answer
868
views
How can I make this query sargable?
As I understand it this is not sargable, so I'd like to do the reverse. (The timestamp table is much larger and efficiency is more of an issue). …
- 1,051
9
votes
3
answers
225
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Can I do a sargable first letter match on two tables?
Is there any way to make this SARGable/run faster? I can't create columns on persons table, but I can create columns on persons2. …
- 115
63
votes
2
answers
11k
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Cast to date is sargable but is it a good idea?
Casting a datetime column to date is sargable and can use an index on the datetime column. …
- 22.2k
7
votes
4
answers
1k
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DATEADD not producing a SARGable expectation of an index seek
Initially I wrote the query using DATEDIFF, but immediately after writing and taking a peek at the execution plan, I remembered that it is not a SARGable function (along with the fact the precision levels … As you'll find on PasteThePlan for this query, it is performing an index scan as expected given that DATEDIFF is not SARGable. …
- 1,574
17
votes
1
answer
973
views
When can SARGable predicates be pushed into a CTE or derived table?
(
SELECT TOP 101
c.UserId, c.Text, c.Score
FROM dbo.Comments AS c
ORDER BY c.Score DESC
)
SELECT *
FROM x
WHERE x.Score >= 500;
The SARGable … Is there a reason that a SARGable predicate can be pushed in some scenarios and not in others? …
7
votes
1
answer
1k
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Order In WHERE Clause Matter For SARGability?
FROM MyTable
WHERE IndexedColumn > 5000
AND OtherIndexedColumn = 2
Since the two columns have up to date indexes, SQL Server can make assumptions and find the values faster and both queries are SARGable … The reason that I'm asking is because I'm aware that I could use a subquery or CTE to do the first part of the SARGable filter, then of the 7 rows, look and see if each is not equal, but is the query optimizer …
- 404
2
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1
answer
96
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How to properly create a Spatial index and write a SARGable query that leverages that Spatia...
The query appears like it should be SARGable, but I still get a clustered index scan, instead of a nonclustered index seek on the Spatial index:
If I try to force the index hint, I get the classic error …
- 39.6k
4
votes
2
answers
300
views
Sargability of queries against a view with a case expression
The very definition of non-sargable.
I am using this view to normalize legacy data so I can write a new application on top of it. I just want the case expression to run on output. … So here is my question:
Is it possible to still have my ShipmentId output go through the case expression, but also have a sargable query when ShipmentId is used in the where clause? …
- 2,540