Function isExpressionValue

AST Module

This module provides types, type guards, helpers, and visitor utilities for working with SQL AST nodes.

Query builders are in src/builders.ts (WASM-backed).

isExpressionValue(value: unknown): value is Expression
Check if a runtime value looks like an Expression.

Expressions in the externally tagged format are single-key objects where the key is the variant name and the value is the inner data object.

Important: The inner value must be a non-null, non-array plain object. Structs like From { expressions: Vec } serialize as { "expressions": [...] } — a single-key object with an array value. These must NOT be treated as Expressions, or the transformer will corrupt them.
Parameters
- value: unknown
Returns value is Expression
- Defined in ast/helpers.ts:91