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https://issues.apache.org/jira/browse/CASSGO-141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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João Reis updated CASSGO-141:
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Reviewers: João Reis, João Reis (was: João Reis)
Status: Review In Progress (was: Patch Available)
> Composite type codecs retain reference to parent RegisteredTypes instead of
> Session registry
> --------------------------------------------------------------------------------------------
>
> Key: CASSGO-141
> URL: https://issues.apache.org/jira/browse/CASSGO-141
> Project: Apache Cassandra Go driver
> Issue Type: Bug
> Components: Core
> Reporter: João Reis
> Assignee: Bohdan Siryk
> Priority: Normal
> Fix For: 2.2.0
>
>
> h3. Problem Description
> When a {{Session}} is initialized, it creates a shallow copy of the cluster's
> type registry ({{s.types = cfg.RegisteredTypes.Copy()}}).
> However, the built-in codecs for composite and nested types ({{list}},
> {{set}}, {{map}}, {{tuple}}, {{udt}}, and {{vector}}) maintain an internal
> reference to the {{RegisteredTypes}} registry to parse nested type strings
> (e.g. {{TypeInfoFromString}} calling {{types.typeInfoFromString}}). Because
> {{Copy()}} does not rebind these internal references to the new session copy,
> the codecs inside the session continue referencing the source
> {{ClusterConfig.RegisteredTypes}} or {{GlobalTypes}}.
> h3. User Impact
> 1. *Nested Type Resolution*: Any custom types or type configurations
> registered on or copied for a specific session are bypassed when resolving
> nested element types within collections, tuples, UDTs, or vectors, falling
> back to the parent/global registry instead.
> 2. *Configuration Isolation*: Settings applied to a copied type registry
> (such as UDT encoding options or custom type mappings) do not propagate
> properly to nested type handling within composite columns.
> h3. Proposed Fix
> In {{RegisteredTypes.Copy()}}, rebind the internal {{types}} reference on
> built-in composite codecs to point to the newly created {{RegisteredTypes}}
> copy.
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