/
xcontext.go
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/
xcontext.go
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/*
* Radon
*
* Copyright 2018 The Radon Authors.
* Code is licensed under the GPLv3.
*
*/
package xcontext
import (
"github.com/xelabs/go-mysqlstack/sqlparser/depends/sqltypes"
)
// RequestMode type.
type RequestMode int
const (
// ReqNormal mode will send the query to the backend which computed by the planner.
// This is the default mode.
ReqNormal RequestMode = iota
// ReqScatter mode will send the RawQuery to all backends.
ReqScatter
// ReqSingle mode will send the RawQuery to the first backend which computed by the scatter.
ReqSingle
)
// TxnMode type.
type TxnMode int
const (
// TxnNone enum.
TxnNone TxnMode = iota
// TxnRead enum.
TxnRead
// TxnWrite enum.
TxnWrite
)
// ResultContext tuple.
type ResultContext struct {
Results *sqltypes.Result
}
// NewResultContext returns the result context.
func NewResultContext() *ResultContext {
return &ResultContext{}
}
// RequestContext tuple.
type RequestContext struct {
RawQuery string
Mode RequestMode
TxnMode TxnMode
Querys []QueryTuple
}
// NewRequestContext creates RequestContext
// The default Mode is ReqNormal
func NewRequestContext() *RequestContext {
return &RequestContext{}
}
// QueryTuple tuple.
type QueryTuple struct {
// Query string.
Query string
// Backend name.
Backend string
// Range info.
Range string
}
// QueryTuples represents the query tuple slice.
type QueryTuples []QueryTuple
// Len impl.
func (q QueryTuples) Len() int { return len(q) }
// Swap impl.
func (q QueryTuples) Swap(i, j int) { q[i], q[j] = q[j], q[i] }
// Less impl.
func (q QueryTuples) Less(i, j int) bool { return q[i].Backend < q[j].Backend }