vitess.io/vitess@v0.16.2/go/vt/vtgate/planbuilder/call_proc.go (about)

     1  /*
     2  Copyright 2021 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package planbuilder
    18  
    19  import (
    20  	"vitess.io/vitess/go/vt/key"
    21  	"vitess.io/vitess/go/vt/sqlparser"
    22  	"vitess.io/vitess/go/vt/vtgate/engine"
    23  	"vitess.io/vitess/go/vt/vtgate/planbuilder/plancontext"
    24  )
    25  
    26  func buildCallProcPlan(stmt *sqlparser.CallProc, vschema plancontext.VSchema) (*planResult, error) {
    27  	var ks string
    28  	if !stmt.Name.Qualifier.IsEmpty() {
    29  		ks = stmt.Name.Qualifier.String()
    30  	}
    31  
    32  	dest, keyspace, _, err := vschema.TargetDestination(ks)
    33  	if err != nil {
    34  		return nil, err
    35  	}
    36  
    37  	if dest == nil {
    38  		if err := vschema.ErrorIfShardedF(keyspace, "CALL", errNotAllowWhenSharded); err != nil {
    39  			return nil, err
    40  		}
    41  		dest = key.DestinationAnyShard{}
    42  	}
    43  
    44  	stmt.Name.Qualifier = sqlparser.NewIdentifierCS("")
    45  
    46  	return newPlanResult(&engine.Send{
    47  		Keyspace:          keyspace,
    48  		TargetDestination: dest,
    49  		Query:             sqlparser.String(stmt),
    50  	}), nil
    51  }
    52  
    53  const errNotAllowWhenSharded = "CALL is not supported for sharded keyspace"