system_user() — PostgreSQL built-in function

system_user(): system user name. PostgreSQL miscellaneous functions — signature, volatility, version applicability and an illustrative example.

The Sev-1 Admin
The Sev-1 Admin  ·  1 min read

Summary

system_user is a PostgreSQL built-in function in the Miscellaneous Functions group. PostgreSQL’s system catalog (pg_proc) describes it as: “system user name”.

Signature

system_user() → 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: STABLE — Marked STABLE — within a single statement it returns a consistent result for the same arguments, but the result can change between statements.
  • Returns: text

Example

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

SELECT system_user();

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, system_user first appears in PostgreSQL 16. It is present in: 16, 17, 18, 19.

Related & references

Reference: PostgreSQL documentation — Miscellaneous Functions.