VARIANT()

All functions > CORE > VARIANT()

Returns a reference to a variant of the given feature with the given replacements in its dependencies.

Signatures

Returns: A variant feature with substituted dependencies

VARIANT(base: FEATURE, origin: ARRAY<FEATURE>, replacement: ARRAY<FEATURE>) → FEATURE

Notes

• Creates a variant of a feature with dependency substitution
• Replaces specified origin features with replacement features
• Useful for A/B testing and feature experimentation
• Origin and replacement arrays must have matching length
• Enables creating alternate versions of features
• Part of the FeatureMesh core system

Examples

Minimal REPLACING substitution (2-variants-base.slt)

WITH
    EXPR := INPUT(BIGINT),
    POWER := INPUT(BIGINT),
    POW(EXPR, POWER) AS OPERATION,
SELECT
    RESULT1 := VARIANT(OPERATION REPLACING EXPR, POWER WITH 2, 2),
;

Two independent VARIANTs of the same base expression

WITH
    EXPR := INPUT(BIGINT),
    POWER := INPUT(BIGINT),
    POW(EXPR, POWER) AS OPERATION,
SELECT
    RESULT1 := VARIANT(OPERATION REPLACING EXPR, POWER WITH 1, 2),
    RESULT2 := VARIANT(OPERATION REPLACING EXPR, POWER WITH 3, 4),
;