Is there any use for defining additional entity types in a SOQL FROM clause?
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Here's a somewhat odd SOQL query from the question query user and profile:
select user.id, user.Email,user.FirstName,user.LastName,user.profile.name,user.Username,user.IsActive
from user, user.profile
Note that the FROM clause includes both user and user.profile.
Here is a simpler example to follow the Contact to Account relationship:
select Id, Name, Account.Name from Contact, Contact.Account
The same query with the relationship join can be performed with:
Select Id, Name, Account.Name From Contact
Is there any purpose to supporting additional SObject types in the from clause, or is it vestigial?
Is is outlined as supported syntax in SOQL.
SELECT fieldList [subquery][...]
[TYPEOF typeOfField whenExpression[...] elseExpression END][...]
FROM objectType[,...]
[USING SCOPE filterScope]
Out of interest, if you don't use a valid sObject relationship on the additional sObject types you get the following message:
INVALID_TYPE:
Name, Account.Name From Contact, Account
^
ERROR at Row:1:Column:45
A driving SObject type has already been set, all other entity types in the FROM clause must
be relationships to the initial object. The driving object is Contact.
While doing some checking I found this old dev forum question that indicated it was added to the syntax in Winter '15. Or at least documented then. - Missing doc for new SOQL multiple object SELECT?
soql
asked 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
add a comment |
Here's a somewhat odd SOQL query from the question query user and profile:
select user.id, user.Email,user.FirstName,user.LastName,user.profile.name,user.Username,user.IsActive
from user, user.profile
Note that the FROM clause includes both user and user.profile.
Here is a simpler example to follow the Contact to Account relationship:
select Id, Name, Account.Name from Contact, Contact.Account
The same query with the relationship join can be performed with:
Select Id, Name, Account.Name From Contact
Is there any purpose to supporting additional SObject types in the from clause, or is it vestigial?
Is is outlined as supported syntax in SOQL.
SELECT fieldList [subquery][...]
[TYPEOF typeOfField whenExpression[...] elseExpression END][...]
FROM objectType[,...]
[USING SCOPE filterScope]
Out of interest, if you don't use a valid sObject relationship on the additional sObject types you get the following message:
INVALID_TYPE:
Name, Account.Name From Contact, Account
^
ERROR at Row:1:Column:45
A driving SObject type has already been set, all other entity types in the FROM clause must
be relationships to the initial object. The driving object is Contact.
While doing some checking I found this old dev forum question that indicated it was added to the syntax in Winter '15. Or at least documented then. - Missing doc for new SOQL multiple object SELECT?
soql
asked 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
Ah, I finally know how this strange syntax can actually be used. No idea on what it actually does though. Maybe it helps with choosing indices to use, or helps disambiguate multiple references to the same related SObject?
– Derek F
2 hours ago
@DerekF Currently is seems redundant. Like it was maybe a left over from the SQL query origins. I'm still not sure what it would help disambiguate. Maybe for polymorphic relationships?
– Daniel Ballinger
2 hours ago
add a comment |
Here's a somewhat odd SOQL query from the question query user and profile:
select user.id, user.Email,user.FirstName,user.LastName,user.profile.name,user.Username,user.IsActive
from user, user.profile
Note that the FROM clause includes both user and user.profile.
Here is a simpler example to follow the Contact to Account relationship:
select Id, Name, Account.Name from Contact, Contact.Account
The same query with the relationship join can be performed with:
Select Id, Name, Account.Name From Contact
Is there any purpose to supporting additional SObject types in the from clause, or is it vestigial?
Is is outlined as supported syntax in SOQL.
SELECT fieldList [subquery][...]
[TYPEOF typeOfField whenExpression[...] elseExpression END][...]
FROM objectType[,...]
[USING SCOPE filterScope]
Out of interest, if you don't use a valid sObject relationship on the additional sObject types you get the following message:
INVALID_TYPE:
Name, Account.Name From Contact, Account
^
ERROR at Row:1:Column:45
A driving SObject type has already been set, all other entity types in the FROM clause must
be relationships to the initial object. The driving object is Contact.
While doing some checking I found this old dev forum question that indicated it was added to the syntax in Winter '15. Or at least documented then. - Missing doc for new SOQL multiple object SELECT?
soql
asked 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
Here's a somewhat odd SOQL query from the question query user and profile:
select user.id, user.Email,user.FirstName,user.LastName,user.profile.name,user.Username,user.IsActive
from user, user.profile
Note that the FROM clause includes both user and user.profile.
Here is a simpler example to follow the Contact to Account relationship:
select Id, Name, Account.Name from Contact, Contact.Account
The same query with the relationship join can be performed with:
Select Id, Name, Account.Name From Contact
Is there any purpose to supporting additional SObject types in the from clause, or is it vestigial?
Is is outlined as supported syntax in SOQL.
SELECT fieldList [subquery][...]
[TYPEOF typeOfField whenExpression[...] elseExpression END][...]
FROM objectType[,...]
[USING SCOPE filterScope]
Out of interest, if you don't use a valid sObject relationship on the additional sObject types you get the following message:
INVALID_TYPE:
Name, Account.Name From Contact, Account
^
ERROR at Row:1:Column:45
A driving SObject type has already been set, all other entity types in the FROM clause must
be relationships to the initial object. The driving object is Contact.
While doing some checking I found this old dev forum question that indicated it was added to the syntax in Winter '15. Or at least documented then. - Missing doc for new SOQL multiple object SELECT?
soql
soql
asked 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
asked 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
asked 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
asked 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
asked 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
74.4k15155406
Ah, I finally know how this strange syntax can actually be used. No idea on what it actually does though. Maybe it helps with choosing indices to use, or helps disambiguate multiple references to the same related SObject?
– Derek F
2 hours ago
@DerekF Currently is seems redundant. Like it was maybe a left over from the SQL query origins. I'm still not sure what it would help disambiguate. Maybe for polymorphic relationships?
– Daniel Ballinger
2 hours ago
add a comment |
Ah, I finally know how this strange syntax can actually be used. No idea on what it actually does though. Maybe it helps with choosing indices to use, or helps disambiguate multiple references to the same related SObject?
– Derek F
2 hours ago
@DerekF Currently is seems redundant. Like it was maybe a left over from the SQL query origins. I'm still not sure what it would help disambiguate. Maybe for polymorphic relationships?
– Daniel Ballinger
2 hours ago
Ah, I finally know how this strange syntax can actually be used. No idea on what it actually does though. Maybe it helps with choosing indices to use, or helps disambiguate multiple references to the same related SObject?
– Derek F
2 hours ago
Ah, I finally know how this strange syntax can actually be used. No idea on what it actually does though. Maybe it helps with choosing indices to use, or helps disambiguate multiple references to the same related SObject?
– Derek F
2 hours ago
@DerekF Currently is seems redundant. Like it was maybe a left over from the SQL query origins. I'm still not sure what it would help disambiguate. Maybe for polymorphic relationships?
– Daniel Ballinger
2 hours ago
@DerekF Currently is seems redundant. Like it was maybe a left over from the SQL query origins. I'm still not sure what it would help disambiguate. Maybe for polymorphic relationships?
– Daniel Ballinger
2 hours ago
add a comment |
1 Answer
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One possible use is to use is to combine it with the Alias notation for the related sObjects.
E.g.
select c.Id, c.Name, ca.Name, art.Name
from Contact c, Contact.Account ca, Contact.Account.RecordType art
If you wanted to query many fields from the related sObject then you could save a significant number of characters if you are running up against the 20,000 character limit.
answered 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
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oldest
votes
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votes
One possible use is to use is to combine it with the Alias notation for the related sObjects.
E.g.
select c.Id, c.Name, ca.Name, art.Name
from Contact c, Contact.Account ca, Contact.Account.RecordType art
If you wanted to query many fields from the related sObject then you could save a significant number of characters if you are running up against the 20,000 character limit.
answered 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
add a comment |
One possible use is to use is to combine it with the Alias notation for the related sObjects.
E.g.
select c.Id, c.Name, ca.Name, art.Name
from Contact c, Contact.Account ca, Contact.Account.RecordType art
If you wanted to query many fields from the related sObject then you could save a significant number of characters if you are running up against the 20,000 character limit.
answered 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
add a comment |
One possible use is to use is to combine it with the Alias notation for the related sObjects.
E.g.
select c.Id, c.Name, ca.Name, art.Name
from Contact c, Contact.Account ca, Contact.Account.RecordType art
If you wanted to query many fields from the related sObject then you could save a significant number of characters if you are running up against the 20,000 character limit.
answered 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
One possible use is to use is to combine it with the Alias notation for the related sObjects.
E.g.
select c.Id, c.Name, ca.Name, art.Name
from Contact c, Contact.Account ca, Contact.Account.RecordType art
If you wanted to query many fields from the related sObject then you could save a significant number of characters if you are running up against the 20,000 character limit.
answered 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
answered 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
answered 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
answered 2 hours ago
Daniel BallingerDaniel Ballinger
74.4k15155406
74.4k15155406
add a comment |
add a comment |
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Ah, I finally know how this strange syntax can actually be used. No idea on what it actually does though. Maybe it helps with choosing indices to use, or helps disambiguate multiple references to the same related SObject?
– Derek F
2 hours ago
@DerekF Currently is seems redundant. Like it was maybe a left over from the SQL query origins. I'm still not sure what it would help disambiguate. Maybe for polymorphic relationships?
– Daniel Ballinger
2 hours ago