expr

func AlphabeticallyByPart ¶

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

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

func EvalExpr ¶

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

EvalExpr is the main expression evaluator.

func FetchAndEvalExp ¶ added in v0.13.0

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

FetchAndEvalExp fetch data and evaluates expressions

func FetchAndEvalExprs ¶ added in v0.16.0

func FetchAndEvalExprs(ctx context.Context, exprs []parser.Expr, from, until int64, values map[parser.MetricRequest][]*types.MetricData) ([]*types.MetricData, map[string]merry.Error)

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.