Risk of Unsafe Type Conversions:
A cast defines how one data type is converted to another.
If misused, it can cause data corruption, unexpected query behavior, or bypass of security constraints.
System-wide Impact:
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Once a cast is created, it’s globally available in the database.
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This can interfere with existing logic, cause compatibility issues with future upgrades, or affect other users' queries.
Philosophy:
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Only superusers are allowed to define or override behavior that affects core database functionality — such as type casting, system catalog changes, and low-level security settings.
Use explicit conversion functions in SQL queries instead of relying on implicit or automatic casts.
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Consider writing a wrapper function that does the conversion safely.
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