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promql: refactor: create query object before parsing

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Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This commit is contained in:
Bryan Boreham 2023-06-01 17:54:17 +00:00
parent 621d29795d
commit 1706264cef
1 changed files with 11 additions and 15 deletions
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26
promql/engine.go
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@ -409,15 +409,15 @@ func (ng *Engine) SetQueryLogger(l QueryLogger) {
// NewInstantQuery returns an evaluation query for the given expression at the given time.
func (ng *Engine) NewInstantQuery(_ context.Context, q storage.Queryable, opts *QueryOpts, qs string, ts time.Time) (Query, error) {
pExpr, qry := ng.newQuery(q, qs, opts, ts, ts, 0)
expr, err := parser.ParseExpr(qs)
if err != nil {
return nil, err
}
qry, err := ng.newQuery(q, opts, expr, ts, ts, 0)
if err != nil {
if err := ng.validateOpts(expr); err != nil {
return nil, err
}
qry.q = qs
*pExpr = PreprocessExpr(expr, ts, ts)
return qry, nil
}
@ -425,27 +425,23 @@ func (ng *Engine) NewInstantQuery(_ context.Context, q storage.Queryable, opts *
// NewRangeQuery returns an evaluation query for the given time range and with
// the resolution set by the interval.
func (ng *Engine) NewRangeQuery(_ context.Context, q storage.Queryable, opts *QueryOpts, qs string, start, end time.Time, interval time.Duration) (Query, error) {
pExpr, qry := ng.newQuery(q, qs, opts, start, end, interval)
expr, err := parser.ParseExpr(qs)
if err != nil {
return nil, err
}
if err := ng.validateOpts(expr); err != nil {
return nil, err
}
if expr.Type() != parser.ValueTypeVector && expr.Type() != parser.ValueTypeScalar {
return nil, fmt.Errorf("invalid expression type %q for range query, must be Scalar or instant Vector", parser.DocumentedType(expr.Type()))
}
qry, err := ng.newQuery(q, opts, expr, start, end, interval)
if err != nil {
return nil, err
}
qry.q = qs
*pExpr = PreprocessExpr(expr, start, end)
return qry, nil
}
func (ng *Engine) newQuery(q storage.Queryable, opts *QueryOpts, expr parser.Expr, start, end time.Time, interval time.Duration) (*query, error) {
if err := ng.validateOpts(expr); err != nil {
return nil, err
}
func (ng *Engine) newQuery(q storage.Queryable, qs string, opts *QueryOpts, start, end time.Time, interval time.Duration) (*parser.Expr, *query) {
// Default to empty QueryOpts if not provided.
if opts == nil {
opts = &QueryOpts{}
@ -457,20 +453,20 @@ func (ng *Engine) newQuery(q storage.Queryable, opts *QueryOpts, expr parser.Exp
}
es := &parser.EvalStmt{
Expr: PreprocessExpr(expr, start, end),
Start: start,
End: end,
Interval: interval,
LookbackDelta: lookbackDelta,
}
qry := &query{
q: qs,
stmt: es,
ng: ng,
stats: stats.NewQueryTimers(),
sampleStats: stats.NewQuerySamples(ng.enablePerStepStats && opts.EnablePerStepStats),
queryable: q,
}
return qry, nil
return &es.Expr, qry
}
var (