indexer

Documentation

Index

• func IsRangeOperation(op query.Operator) bool
• type BlockIndexer
• type QueryRange
  • func (qr QueryRange) AnyBound() interface{}
  • func (qr QueryRange) LowerBoundValue() interface{}
  • func (qr QueryRange) UpperBoundValue() interface{}
• type QueryRanges
  • func LookForRanges(conditions []query.Condition) (ranges QueryRanges, indexes []int)

Functions

func IsRangeOperation

func IsRangeOperation(op query.Operator) bool

IsRangeOperation returns a boolean signifying if a query Operator is a range operation or not.

Types

type BlockIndexer

type BlockIndexer interface {
	// Has returns true if the given height has been indexed. An error is returned
	// upon database query failure.
	Has(height int64) (bool, error)

	// Index indexes BeginBlock and EndBlock events for a given block by its height.
	Index(types.EventDataNewBlockHeader) error

	// Search performs a query for block heights that match a given BeginBlock
	// and Endblock event search criteria.
	Search(ctx context.Context, q *query.Query) ([]int64, error)
}

BlockIndexer defines an interface contract for indexing block events.

type QueryRange

type QueryRange struct {
	LowerBound        interface{} // int || time.Time
	UpperBound        interface{} // int || time.Time
	Key               string
	IncludeLowerBound bool
	IncludeUpperBound bool
}

QueryRange defines a range within a query condition.

func (QueryRange) AnyBound

func (qr QueryRange) AnyBound() interface{}

AnyBound returns either the lower bound if non-nil, otherwise the upper bound.

func (QueryRange) LowerBoundValue

func (qr QueryRange) LowerBoundValue() interface{}

LowerBoundValue returns the value for the lower bound. If the lower bound is nil, nil will be returned.

func (QueryRange) UpperBoundValue

func (qr QueryRange) UpperBoundValue() interface{}

UpperBoundValue returns the value for the upper bound. If the upper bound is nil, nil will be returned.

type QueryRanges

type QueryRanges map[string]QueryRange

QueryRanges defines a mapping between a composite event key and a QueryRange.

e.g.account.number => queryRange{lowerBound: 1, upperBound: 5}

func LookForRanges

func LookForRanges(conditions []query.Condition) (ranges QueryRanges, indexes []int)

LookForRanges returns a mapping of QueryRanges and the matching indexes in the provided query conditions.