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https://issues.apache.org/jira/browse/CASSANDRA-10537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469970#comment-17469970
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ROCHETEAU Antoine edited comment on CASSANDRA-10537 at 1/7/22, 8:36 AM:
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Hello,
I just take a look into this improvement and so far this is the current state
of my working branch:
Use of *CONTAINS* operator is allowed on collection (evaluation of the
condition is performed on lists, sets and maps values)
Use of *CONTAINS KEY* operator is allowed on map only (evaluation is performed
on map keyset)
So these conditions are now valid and working:
{{IF list_column CONTAINS 'bar'}}
{{IF set_column CONTAINS 'bar'}}
{{IF map_column CONTAINS 'bar'}}
{{IF map_column CONTAINS KEY 'foo'}}
These are not and will throw an {_}InvalidRequestException{_}:
{{IF list_column CONTAINS KEY 'bar'}}
{{IF set_column CONTAINS KEY 'bar'}}
{{IF text_column CONTAINS 'bar'}}
Finally, these are still throwing a {_}SyntaxException{_}:
{{IF list_column[1] CONTAINS 'bar'}}
{{IF map_column['foo'] CONTAINS 'bar'}}
{{IF udt_column.a CONTAINS 'bar' }}
Modifications are quite light so i haven't started the refactoring of
_ColumnCondition_ mentioned by [~ifesdjeen] (even if i'm agree on its benefits).
-Should I submit a pull request in this current state or did i miss something
?-
[PR 1380|https://github.com/apache/cassandra/pull/1380]
Best regards,
Antoine
was (Author: antoine rocheteau):
Hello,
I just take a look into this improvement and so far this is the current state
of my working branch:
Use of *CONTAINS* operator is allowed on collection (evaluation of the
condition is performed on lists, sets and maps values)
Use of *CONTAINS KEY* operator is allowed on map only (evaluation is performed
on map keyset)
So these conditions are now valid and working:
{{IF list_column CONTAINS 'bar'}}
{{IF set_column CONTAINS 'bar'}}
{{IF map_column CONTAINS 'bar'}}
{{IF map_column CONTAINS KEY 'foo'}}
These are not and will throw an {_}InvalidRequestException{_}:
{{IF list_column CONTAINS KEY 'bar'}}
{{IF set_column CONTAINS KEY 'bar'}}
{{IF text_column CONTAINS 'bar'}}
Finally, these are still throwing a {_}SyntaxException{_}:
{{IF list_column[1] CONTAINS 'bar'}}
{{IF map_column['foo'] CONTAINS 'bar'}}
{{IF udt_column.a CONTAINS 'bar' }}
Modifications are quite light so i haven't started the refactoring of
_ColumnCondition_ mentioned by [~ifesdjeen] (even if i'm agree on its benefits).
Should I submit a pull request in this current state or did i miss something ?
Best regards,
Antoine
> CONTAINS and CONTAINS KEY support for Lightweight Transactions
> --------------------------------------------------------------
>
> Key: CASSANDRA-10537
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10537
> Project: Cassandra
> Issue Type: Improvement
> Components: Legacy/CQL
> Reporter: Nimi Wariboko Jr.
> Priority: Normal
> Labels: AdventCalendar2021, CQL, lhf
> Fix For: 4.x
>
>
> Conditional updates currently do not support CONTAINS and CONTAINS KEY
> conditions. Queries such as
> {{UPDATE mytable SET somefield = 4 WHERE pk = 'pkv' IF set_column CONTAINS
> 5;}}
> are not possible.
> Would it also be possible to support the negation of these (ex. testing that
> a value does not exist inside a set)?
> +Additional Information for newcomers:+
> Negation should not be supported as for the moment we do not support it
> within restrictions either.
> One way to approch this bug is to use test driven development. You can modify
> {{InsertUpdateIfConditionCollectionsTest}} to allow CONTAINS and CONTAINS KEY
> operators and go through the different failures.
> The following changes will need to be done.
> * The {{columnCondition}} rule from the ANTLR {{Parser.g}} file should be
> updated to accept {{containsOperator}}.
> * {{ColumnCondition.Raw#prepareTerms}} should be modified in the case where
> the operator is a CONTAINS or CONTAINS KEY as the {{receiver}} is not the
> collection but keys or values of the collection. Look at
> {{SingleColumnRelation#makeCollectionReceiver}}.
> * {{ColumnCollection.MultiCellCollectionBound#valueAppliesTo}} will need to
> be changed for {{Map}} and {{Set}} to process CONTAINS operators.
>
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