Function collectRefs

packages/db/src/query/optimizer.ts:1085–1105

* Recursively collects all PropRef references from an expression. * * @param expr - The expression to traverse * @returns Array of PropRef references found in the expression

(expr: any)

 * @returns Array of PropRef references found in the expression
 */
function collectRefs(expr: any): Array<PropRef> {
  const refs: Array<PropRef> = []

  if (expr == null || typeof expr !== `object`) return refs

  switch (expr.type) {
    case `ref`:
      refs.push(expr as PropRef)
      break
    case `func`:
    case `agg`:
      for (const arg of expr.args ?? []) {
        refs.push(...collectRefs(arg))
      }
      break
    default:
      break
  }

  return refs
}

/**
 * Determines whether the provided WHERE clause references fields that are