Function compileSelectValue

packages/db/src/query/compiler/select.ts:186–225

(
  value: SelectValueExpression | null | undefined,
)

}

function compileSelectValue(
  value: SelectValueExpression | null | undefined,
): (row: NamespacedRow) => any {
  if (value == null) {
    return () => value
  }

  if (isConditionalSelectValue(value)) {
    if (containsAggregate(value)) {
      return () => null
    }

    return compileConditionalSelect(value)
  }

  if (value instanceof ValClass) {
    return () => value.value
  }

  if (value.type === `includesSubquery`) {
    return () => null
  }

  if (isNestedSelectObject(value)) {
    return compileSelectObject(value)
  }

  if (
    isAggregateExpression(value as BasicExpression | Aggregate) ||
    containsAggregate(value as BasicExpression | Aggregate)
  ) {
    return () => null
  }

  if (!isExpressionLike(value)) {
    return () => value
  }

  return compileExpression(value as BasicExpression)
}

function compileConditionalSelect(
  conditional: ConditionalSelect,