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internal.go
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internal.go
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// Copyright 2016 The Cockroach Authors.
//
// Licensed 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.
//
// Author: Matt Tracy (matt@cockroachlabs.com)
package sql
import (
"github.com/cockroachdb/cockroach/client"
"github.com/cockroachdb/cockroach/keys"
"github.com/cockroachdb/cockroach/roachpb"
"github.com/cockroachdb/cockroach/security"
"github.com/cockroachdb/cockroach/sql/parser"
)
// InternalExecutor can be used internally by cockroach to execute SQL
// statements without needing to open a SQL connection. InternalExecutor assumes
// that the caller has access to a cockroach KV client to handle connection and
// transaction management.
type InternalExecutor struct {
LeaseManager *LeaseManager
}
// ExecuteStatementInTransaction executes the supplied SQL statement as part of
// the supplied transaction. Statements are currently executed as the root user.
func (ie InternalExecutor) ExecuteStatementInTransaction(
txn *client.Txn, statement string, params ...interface{},
) (int, *roachpb.Error) {
p := makePlanner()
p.setTxn(txn)
p.session.User = security.RootUser
p.leaseMgr = ie.LeaseManager
return p.exec(statement, params...)
}
// GetTableSpan gets the key span for a SQL table, including any indices.
func (ie InternalExecutor) GetTableSpan(user string, txn *client.Txn, dbName, tableName string) (roachpb.Span, *roachpb.Error) {
// Lookup the table ID.
p := makePlanner()
p.setTxn(txn)
p.session.User = user
p.leaseMgr = ie.LeaseManager
qname := &parser.QualifiedName{Base: parser.Name(tableName)}
if err := qname.NormalizeTableName(dbName); err != nil {
return roachpb.Span{}, roachpb.NewError(err)
}
tableID, pErr := p.getTableID(qname)
if pErr != nil {
return roachpb.Span{}, pErr
}
// Determine table data span.
tablePrefix := keys.MakeTablePrefix(uint32(tableID))
tableStartKey := roachpb.Key(tablePrefix)
tableEndKey := tableStartKey.PrefixEnd()
return roachpb.Span{Key: tableStartKey, EndKey: tableEndKey}, nil
}