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keys.go
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keys.go
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// Copyright 2015 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. See the AUTHORS file
// for names of contributors.
//
// Author: Tamir Duberstein (tamird@gmail.com)
package structured
import (
"strings"
"github.com/cockroachdb/cockroach/keys"
"github.com/cockroachdb/cockroach/proto"
"github.com/cockroachdb/cockroach/util/encoding"
)
// MakeNameMetadataKey returns the key for the name.
func MakeNameMetadataKey(parentID ID, name string) proto.Key {
name = strings.ToLower(name)
k := make([]byte, 0, len(keys.NameMetadataPrefix)+encoding.MaxUvarintSize+len(name))
k = append(k, keys.NameMetadataPrefix...)
k = encoding.EncodeUvarint(k, uint64(parentID))
k = append(k, name...)
return k
}
// MakeDescMetadataKey returns the key for the descriptor.
func MakeDescMetadataKey(descID ID) proto.Key {
k := make([]byte, 0, len(keys.DescMetadataPrefix)+encoding.MaxUvarintSize)
k = append(k, keys.DescMetadataPrefix...)
k = encoding.EncodeUvarint(k, uint64(descID))
return k
}
// MakeColumnKey returns the key for the column in the given row.
func MakeColumnKey(colID ColumnID, primaryKey []byte) proto.Key {
var key []byte
key = append(key, primaryKey...)
return encoding.EncodeUvarint(key, uint64(colID))
}
// MakeTablePrefix returns the key prefix used for the table's data.
func MakeTablePrefix(tableID ID) []byte {
var key []byte
key = append(key, keys.TableDataPrefix...)
key = encoding.EncodeUvarint(key, uint64(tableID))
return key
}
// MakeIndexKeyPrefix returns the key prefix used for the index's data.
func MakeIndexKeyPrefix(tableID ID, indexID IndexID) []byte {
var key []byte
key = append(key, keys.TableDataPrefix...)
key = encoding.EncodeUvarint(key, uint64(tableID))
key = encoding.EncodeUvarint(key, uint64(indexID))
return key
}