Method applyOffsetAndLimit

engine/engine.go:626–652

(command *ast.SelectCommand)

}

func (table *Table) applyOffsetAndLimit(command *ast.SelectCommand) {
	var offset = 0
	var limitRaw = -1

	if command.HasLimitCommand() {
		limitRaw = command.LimitCommand.Count
	}
	if command.HasOffsetCommand() {
		offset = command.OffsetCommand.Count
	}

	for _, column := range table.Columns {
		var limit int

		if limitRaw == -1 || limitRaw+offset > len(column.Values) {
			limit = len(column.Values)
		} else {
			limit = limitRaw + offset
		}

		if offset > len(column.Values) || limit == 0 {
			column.Values = make([]ValueInterface, 0)
		} else {
			column.Values = column.Values[offset:limit]
		}
	}
}

func xor(fulfilledFilters bool, negation bool) bool {
	return (fulfilledFilters || negation) && !(fulfilledFilters && negation)