xml() — PostgreSQL string function

xml(): perform a non-validating parse of a character string to produce an XML value. PostgreSQL string functions — signature, volatility, version applicability and an illustrative example.

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

Summary

xml is a PostgreSQL built-in function in the String Functions group. PostgreSQL’s system catalog (pg_proc) describes it as: “perform a non-validating parse of a character string to produce an XML value”.

Signature

xml(text) → xml

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: String 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: xml

Example

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

SELECT xml('abc');

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

xml is present across the surveyed releases (PostgreSQL 15, 16, 17, 18, 19). On older major versions, behaviour may differ in detail — always check the documentation for the version you run.

Related & references

Reference: PostgreSQL documentation — String Functions.