v.25.5Improvement

System table system.functions now shows

Official CH changelog text
System table system.functions now shows in which ClickHouse version functions were first introduced. #79839 (Robert Schulze).
The system table system.functions now includes information about the ClickHouse version in which each function was first introduced.

Why it matters

This feature helps users identify the version history of built-in functions, enabling better compatibility checks and informed usage decisions when developing or migrating queries.

How to use it

Users can query the system.functions table as usual. The additional column showing the version of first introduction allows filtering or inspection to determine when functions became available.

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