Function extractInField

packages/db/src/query/predicate-utils.ts:1236–1269

(func: Func)

}

function extractInField(func: Func): InField | null {
  if (func.name === `in`) {
    const firstArg = func.args[0]
    const secondArg = func.args[1]

    if (
      firstArg?.type === `ref` &&
      secondArg?.type === `val` &&
      Array.isArray(secondArg.value)
    ) {
      let values = secondArg.value
      // Precompute optimization metadata once
      const allPrimitives = areAllPrimitives(values)
      let primitiveSet: Set<any> | null = null

      if (allPrimitives && values.length > 10) {
        // Build Set and dedupe values at the same time
        primitiveSet = new Set(values)
        // If we found duplicates, use the deduped array going forward
        if (primitiveSet.size < values.length) {
          values = Array.from(primitiveSet)
        }
      }

      return {
        ref: firstArg,
        values,
        areAllPrimitives: allPrimitives,
        primitiveSet,
      }
    }
  }
  return null
}

function isComparisonSubset(
  subsetFunc: Func,