Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func ExtractFetchExpressions ¶
ExtractFetchExpressions extracts timeseries fetch expressions from the given query
func MustRegisterAliasedFunction ¶
func MustRegisterAliasedFunction(fname string, f interface{})
MustRegisterAliasedFunction registers a function under an alias, issuing a panic if the function cannot be registered
Types ¶
type ArgumentASTNode ¶
type ArgumentASTNode interface {
String() string
}
ArgumentASTNode is an interface to help with printing the AST.
type CallASTNode ¶
type CallASTNode interface {
// Name returns the name of the call.
Name() string
// Arguments describe each argument that the call has, some
// arguments can be casted to an Call themselves.
Arguments() []ArgumentASTNode
}
CallASTNode is an interface to help with printing the AST.
type Engine ¶
type Engine struct {
// contains filtered or unexported fields
}
The Engine for running queries.
func (*Engine) Compile ¶
func (e *Engine) Compile(s string) (Expression, error)
Compile compiles an expression from an expression string
func (*Engine) FetchByQuery ¶
func (e *Engine) FetchByQuery( ctx context.Context, query string, options storage.FetchOptions, ) (*storage.FetchResult, error)
FetchByQuery retrieves one or more time series based on a query.
type Expression ¶
type Expression interface {
CallASTNode
// Executes the expression against the given context, and returns the resulting time series data
Execute(ctx *common.Context) (ts.SeriesList, error)
}
An Expression is a metric query expression
func Compile ¶ added in v0.15.14
func Compile(input string) (Expression, error)
Compile converts an input stream into the corresponding Expression.
type Function ¶
type Function struct {
// contains filtered or unexported fields
}
Function contains a function to invoke along with metadata about the function's argument and return type.
func MustRegisterFunction ¶
func MustRegisterFunction(f interface{}) *Function
MustRegisterFunction registers a function, issuing a panic if the function cannot be registered
func (*Function) WithDefaultParams ¶
WithDefaultParams provides default parameters for functions
Source Files