expr

Documentation

Index

• func AlphabeticallyByPart(metrics []*types.MetricData, part int) sort.Interface
• func ByPart(metrics []*types.MetricData, part int) byPartBase
• func EvalExpr(ctx context.Context, e parser.Expr, from, until int64, ...) ([]*types.MetricData, error)
• func FetchAndEvalExp(ctx context.Context, e parser.Expr, from, until int64, ...) ([]*types.MetricData, error)
• func RewriteExpr(ctx context.Context, e parser.Expr, from, until int64, ...) (bool, []string, error)
• func SortMetrics(metrics []*types.MetricData, mfetch parser.MetricRequest)

Functions

func AlphabeticallyByPart

func AlphabeticallyByPart(metrics []*types.MetricData, part int) sort.Interface

AlphabeticallyByPart returns a byPartAlphabetical that will sort 'metrics' alphabetically by 'part'.

func ByPart

func ByPart(metrics []*types.MetricData, part int) byPartBase

ByPart returns a byPartBase suitable for sorting 'metrics' by 'part'.

func EvalExpr

func EvalExpr(ctx context.Context, e parser.Expr, from, until int64, values map[parser.MetricRequest][]*types.MetricData) ([]*types.MetricData, error)

Eval is the main expression evaluator

func FetchAndEvalExp

func FetchAndEvalExp(ctx context.Context, e parser.Expr, from, until int64, values map[parser.MetricRequest][]*types.MetricData) ([]*types.MetricData, error)

FetchAndEvalExp fetch data and evalualtes expressions

func RewriteExpr

func RewriteExpr(ctx context.Context, e parser.Expr, from, until int64, values map[parser.MetricRequest][]*types.MetricData) (bool, []string, error)

RewriteExpr expands targets that use applyByNode into a new list of targets. eg: applyByNode(foo*, 1, "%") -> (true, ["foo1", "foo2"], nil) sumSeries(foo) -> (false, nil, nil) Assumes that applyByNode only appears as the outermost function.

func SortMetrics

func SortMetrics(metrics []*types.MetricData, mfetch parser.MetricRequest)

SortMetrics sort metric data alphabetically.