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Posted to commits@cassandra.apache.org by "Brandon Williams (Jira)" <ji...@apache.org> on 2022/01/05 18:23:00 UTC
[jira] [Commented] (CASSANDRA-17190) Add support for String contatenation through the "+" operator
[ https://issues.apache.org/jira/browse/CASSANDRA-17190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469470#comment-17469470 ]
Brandon Williams commented on CASSANDRA-17190:
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[Circle|https://app.circleci.com/pipelines/github/driftx/cassandra?branch=CASSANDRA-17190&filter=all] running.
> Add support for String contatenation through the "+" operator
> -------------------------------------------------------------
>
> Key: CASSANDRA-17190
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17190
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL/Interpreter
> Reporter: Benjamin Lerer
> Assignee: Manish Ghildiyal
> Priority: Normal
> Labels: AdventCalendar2021, lhf
> Fix For: 4.x
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> Since 4.0, Cassandra support operations on numeric types and on some temporal types.
> We should add support for string concatenations through the {{+}} operator.
> +Additional information for newcomers:+
> Cassandra has 2 string types: {{Text}} ({{UTF8Type}}) and ascii ({{AsciiType}}) both are sub-classes of ({{StringType}}). In order to add support for string concatenation you will need to add a new method to {{StringType}} and modify {{OperationFcts}} to add the new functions (one for each combination of types: ascii/ascii, ascii/text, text/ascii and text/text).
> The unit test should be added to {{OperationFctsTest}}.
> To allow for concatenating constants (eg: SELECT v1 + ' ' + v2 FROM ...) you will need to add a {{getPreferedTypeFor}} method to {{org.apache.cassandra.Constants.Type.STRING}} that determine the constant type based on its content (ascii or not).
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