[jira] [Updated] (CALCITE-7448) Add support for ':' variant path access syntax

["Tamas Mate (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-7448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tamas Mate updated CALCITE-7448:
--------------------------------
    Summary: Add support for ':' variant path access syntax  (was: Support colon-based field/item access syntax)

> Add support for ':' variant path access syntax
> ----------------------------------------------
>
>                 Key: CALCITE-7448
>                 URL: https://issues.apache.org/jira/browse/CALCITE-7448
>             Project: Calcite
>          Issue Type: New Feature
>          Components: core
>    Affects Versions: 1.41.0
>            Reporter: Tamas Mate
>            Priority: Major
>              Labels: parser, pull-request-available
>
> Implement support for colon field access syntax in the parser, for example:
> {code:java}
> v:field
> v:field.subfield
> v:['field name']
> arr[1]:field{code}
> Several systems (e.g. Snowflake, Databricks) support this kind of access, and with recent VARIANT support in Parquet it seems increasingly relevant for interoperability.
>  * [Databricks - :: (colon colon sign) operator|https://docs.databricks.com/aws/en/sql/language-manual/functions/coloncolonsign]
>  * [Databricks - : (colon sign) operator|https://docs.databricks.com/aws/en/sql/language-manual/functions/colonsign]
>  * [Snowflake - :: operator|https://docs.snowflake.com/en/sql-reference/data-types-semistructured#using-variant-values]
>  * [Snowflake - : Dot Notation|https://docs.snowflake.com/en/user-guide/querying-semistructured#label-querying-semistructured-data-dot-notation]
> One challenge is that ":" is already used in JSON constructor syntax, for example:
> {code:java}
> JSON_OBJECT('k': v)
> JSON_OBJECTAGG(k: v){code}
> The implementation needs to define how these cases interact, whether through
> disambiguation, dialect-specific behavior, or parser configuration.



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