fix(sdk): detect character pattern wildcards in View instrument_name (#5664)

[Dotify71]

Description

Fixes #5664

According to the OpenTelemetry Metrics Specification, if name is provided, instrument_name MUST NOT contain wildcard characters (*, ?, [seq], [!seq]).

Previously, View.__init__ only checked for * and ?, missing [ (and ]). As a result, wildcard patterns like instrument_name="http_[0-9]" with a custom name passed initialization without raising an Exception and matched multiple instruments.

This PR updates the wildcard check in View.__init__ to check for [ as well, preventing character set wildcards when a custom View name is set.

Type of Change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• Followed coding style guidelines
• Added unit tests for new/changed behavior
• All existing and new tests pass
• Created changelog entry in .changelog/5664.fixed

[opentelemetry-pr-dashboard]

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Waiting on reviewers · refreshed 2026-09-19 06:28 UTC

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