forked from cockroachdb/cockroach
/
backup.go
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/
backup.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: Daniel Harrison (daniel.harrison@gmail.com
package parser
import "bytes"
// Backup represents a BACKUP statement.
type Backup struct {
Targets TargetList
To Expr
IncrementalFrom Exprs
AsOf AsOfClause
Options KVOptions
}
var _ Statement = &Backup{}
// Format implements the NodeFormatter interface.
func (node *Backup) Format(buf *bytes.Buffer, f FmtFlags) {
buf.WriteString("BACKUP ")
FormatNode(buf, f, node.Targets)
buf.WriteString(" TO ")
FormatNode(buf, f, node.To)
if node.AsOf.Expr != nil {
buf.WriteString(" ")
FormatNode(buf, f, node.AsOf)
}
if node.IncrementalFrom != nil {
buf.WriteString(" INCREMENTAL FROM ")
FormatNode(buf, f, node.IncrementalFrom)
}
if node.Options != nil {
buf.WriteString(" WITH OPTIONS (")
FormatNode(buf, f, node.Options)
buf.WriteString(")")
}
}
// Restore represents a RESTORE statement.
type Restore struct {
Targets TargetList
From Exprs
AsOf AsOfClause
Options KVOptions
}
var _ Statement = &Restore{}
// Format implements the NodeFormatter interface.
func (node *Restore) Format(buf *bytes.Buffer, f FmtFlags) {
buf.WriteString("RESTORE ")
FormatNode(buf, f, node.Targets)
buf.WriteString(" FROM ")
FormatNode(buf, f, node.From)
if node.AsOf.Expr != nil {
buf.WriteString(" ")
FormatNode(buf, f, node.AsOf)
}
if node.Options != nil {
buf.WriteString(" WITH OPTIONS (")
FormatNode(buf, f, node.Options)
buf.WriteString(")")
}
}
// KVOption is a key-value option.
type KVOption struct {
Key string
Value string
}
// KVOptions is a list of KVOptions.
type KVOptions []KVOption
// Get returns first value for requested key and if it was found or not.
func (o KVOptions) Get(key string) (string, bool) {
for _, k := range o {
if key == k.Key {
return k.Value, true
}
}
return "", false
}
// Format implements the NodeFormatter interface.
func (o KVOptions) Format(buf *bytes.Buffer, f FmtFlags) {
for i, n := range o {
if i > 0 {
buf.WriteString(", ")
}
encodeSQLStringWithFlags(buf, n.Key, f)
if len(n.Value) != 0 {
buf.WriteString(`=`)
encodeSQLStringWithFlags(buf, n.Value, f)
}
}
}