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show_status.go
70 lines (58 loc) · 1.8 KB
/
show_status.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package dal
import (
"context"
"strings"
)
import (
"github.com/pkg/errors"
)
import (
"github.com/arana-db/arana/pkg/proto"
"github.com/arana-db/arana/pkg/runtime/ast"
"github.com/arana-db/arana/pkg/runtime/plan"
)
var _ proto.Plan = (*ShowOpenTablesPlan)(nil)
type ShowStatusPlan struct {
plan.BasePlan
Database string
stmt *ast.ShowStatus
}
func NewShowStatusPlan(stmt *ast.ShowStatus) *ShowStatusPlan {
return &ShowStatusPlan{stmt: stmt}
}
func (s *ShowStatusPlan) Type() proto.PlanType {
return proto.PlanTypeQuery
}
func (s *ShowStatusPlan) ExecIn(ctx context.Context, vConn proto.VConn) (proto.Result, error) {
var (
sb strings.Builder
args []int
)
ctx, span := plan.Tracer.Start(ctx, "ShowStatusPlan.ExecIn")
defer span.End()
if err := s.stmt.Restore(ast.RestoreDefault, &sb, &args); err != nil {
return nil, errors.Wrap(err, "failed to execute SHOW STATUS statement")
}
ret, err := vConn.Query(ctx, "", sb.String(), s.ToArgs(args)...)
if err != nil {
return nil, err
}
return ret, nil
}