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metricsview_totals.go
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/
metricsview_totals.go
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package queries
import (
"context"
"encoding/json"
"fmt"
"io"
"strings"
runtimev1 "github.com/rilldata/rill/proto/gen/rill/runtime/v1"
"github.com/rilldata/rill/runtime"
"github.com/rilldata/rill/runtime/drivers"
"google.golang.org/protobuf/types/known/timestamppb"
)
type MetricsViewTotals struct {
MetricsViewName string `json:"metrics_view_name,omitempty"`
MeasureNames []string `json:"measure_names,omitempty"`
InlineMeasures []*runtimev1.InlineMeasure `json:"inline_measures,omitempty"`
TimeStart *timestamppb.Timestamp `json:"time_start,omitempty"`
TimeEnd *timestamppb.Timestamp `json:"time_end,omitempty"`
Filter *runtimev1.MetricsViewFilter `json:"filter,omitempty"`
MetricsView *runtimev1.MetricsViewSpec `json:"-"`
ResolvedMVSecurity *runtime.ResolvedMetricsViewSecurity `json:"security"`
Result *runtimev1.MetricsViewTotalsResponse `json:"-"`
}
var _ runtime.Query = &MetricsViewTotals{}
func (q *MetricsViewTotals) Key() string {
r, err := json.Marshal(q)
if err != nil {
panic(err)
}
return fmt.Sprintf("MetricsViewTotals:%s", r)
}
func (q *MetricsViewTotals) Deps() []*runtimev1.ResourceName {
return []*runtimev1.ResourceName{
{Kind: runtime.ResourceKindMetricsView, Name: q.MetricsViewName},
}
}
func (q *MetricsViewTotals) MarshalResult() *runtime.QueryResult {
return &runtime.QueryResult{
Value: q.Result,
Bytes: sizeProtoMessage(q.Result),
}
}
func (q *MetricsViewTotals) UnmarshalResult(v any) error {
res, ok := v.(*runtimev1.MetricsViewTotalsResponse)
if !ok {
return fmt.Errorf("MetricsViewTotals: mismatched unmarshal input")
}
q.Result = res
return nil
}
func (q *MetricsViewTotals) Resolve(ctx context.Context, rt *runtime.Runtime, instanceID string, priority int) error {
olap, release, err := rt.OLAP(ctx, instanceID)
if err != nil {
return err
}
defer release()
if olap.Dialect() != drivers.DialectDuckDB && olap.Dialect() != drivers.DialectDruid {
return fmt.Errorf("not available for dialect '%s'", olap.Dialect())
}
if q.MetricsView.TimeDimension == "" && (q.TimeStart != nil || q.TimeEnd != nil) {
return fmt.Errorf("metrics view '%s' does not have a time dimension", q.MetricsViewName)
}
ql, args, err := q.buildMetricsTotalsSQL(q.MetricsView, olap.Dialect(), q.ResolvedMVSecurity)
if err != nil {
return fmt.Errorf("error building query: %w", err)
}
meta, data, err := metricsQuery(ctx, olap, priority, ql, args)
if err != nil {
return err
}
if len(data) == 0 {
return fmt.Errorf("no rows received from totals query")
}
q.Result = &runtimev1.MetricsViewTotalsResponse{
Meta: meta,
Data: data[0],
}
return nil
}
func (q *MetricsViewTotals) Export(ctx context.Context, rt *runtime.Runtime, instanceID string, w io.Writer, opts *runtime.ExportOptions) error {
return ErrExportNotSupported
}
func (q *MetricsViewTotals) buildMetricsTotalsSQL(mv *runtimev1.MetricsViewSpec, dialect drivers.Dialect, policy *runtime.ResolvedMetricsViewSecurity) (string, []any, error) {
ms, err := resolveMeasures(mv, q.InlineMeasures, q.MeasureNames)
if err != nil {
return "", nil, err
}
selectCols := []string{}
for _, m := range ms {
expr := fmt.Sprintf(`%s as "%s"`, m.Expression, m.Name)
selectCols = append(selectCols, expr)
}
whereClause := "1=1"
args := []any{}
if mv.TimeDimension != "" {
if q.TimeStart != nil {
whereClause += fmt.Sprintf(" AND %s >= ?", safeName(mv.TimeDimension))
args = append(args, q.TimeStart.AsTime())
}
if q.TimeEnd != nil {
whereClause += fmt.Sprintf(" AND %s < ?", safeName(mv.TimeDimension))
args = append(args, q.TimeEnd.AsTime())
}
}
if q.Filter != nil {
clause, clauseArgs, err := buildFilterClauseForMetricsViewFilter(mv, q.Filter, dialect, policy)
if err != nil {
return "", nil, err
}
whereClause += " " + clause
args = append(args, clauseArgs...)
}
sql := fmt.Sprintf(
"SELECT %s FROM %q WHERE %s",
strings.Join(selectCols, ", "),
mv.Table,
whereClause,
)
return sql, args, nil
}