icu_unicode_version() — PostgreSQL built-in function

Summary

icu_unicode_version is a PostgreSQL built-in function in the Miscellaneous Functions group. PostgreSQL’s system catalog (pg_proc) describes it as: “Unicode version used by ICU, if enabled”.

Signature

icu_unicode_version() → text

Argument and return types are taken from the pg_proc catalog; internal type names are shown using their readable SQL spellings (for example int4 is shown as integer). (Derived from the catalog — see the linked reference for the canonical documentation.)

Classification

• Category: Miscellaneous Functions
• Kind: Function
• Volatility: IMMUTABLE — Marked IMMUTABLE — it always returns the same result for the same arguments and can be used in indexes and other contexts that require immutability.
• Returns: text

Example

Illustrative form (replace placeholder values with your own data):

SELECT icu_unicode_version();

The example above is illustrative and is meant to show calling syntax only; consult the linked PostgreSQL documentation for exact semantics, edge cases and accepted argument combinations.

Version applicability

Based on the catalog across releases, icu_unicode_version first appears in PostgreSQL 17. It is present in: 17, 18, 19.

Related & references

• PostgreSQL built-in function index
• More Miscellaneous Functions

Reference: PostgreSQL documentation — Miscellaneous Functions.