Golang ValArgの例

コード例 #1

ファイル: insert.go プロジェクト: henryanand/vitess

func buildIndexPlan(ins *sqlparser.Insert, tablename string, colVindex *ColVindex, plan *Plan) error {
	pos := -1
	for i, column := range ins.Columns {
		if colVindex.Col == sqlparser.GetColName(column.(*sqlparser.NonStarExpr).Expr) {
			pos = i
			break
		}
	}
	if pos == -1 {
		pos = len(ins.Columns)
		ins.Columns = append(ins.Columns, &sqlparser.NonStarExpr{Expr: &sqlparser.ColName{Name: []byte(colVindex.Col)}})
		ins.Rows.(sqlparser.Values)[0] = append(ins.Rows.(sqlparser.Values)[0].(sqlparser.ValTuple), &sqlparser.NullVal{})
	}
	row := ins.Rows.(sqlparser.Values)[0].(sqlparser.ValTuple)
	val, err := asInterface(row[pos])
	if err != nil {
		return fmt.Errorf("could not convert val: %s, pos: %d", row[pos], pos)
	}
	plan.Values = append(plan.Values.([]interface{}), val)
	row[pos] = sqlparser.ValArg([]byte(fmt.Sprintf(":_%s", colVindex.Col)))
	return nil
}

コード例 #2

ファイル: plan.go プロジェクト: henryanand/vitess

// license that can be found in the LICENSE file.

package planbuilder

import (
	"errors"
	"fmt"

	log "github.com/golang/glog"
	"github.com/henryanand/vitess/go/vt/schema"
	"github.com/henryanand/vitess/go/vt/sqlparser"
)

var (
	TooComplex = errors.New("Complex")
	execLimit  = &sqlparser.Limit{Rowcount: sqlparser.ValArg(":#maxLimit")}
)

// ExecPlan is built for selects and DMLs.
// PK Values values within ExecPlan can be:
// sqltypes.Value: sourced form the query, or
// string: bind variable name starting with ':', or
// nil if no value was specified
type ExecPlan struct {
	PlanId    PlanType
	Reason    ReasonType
	TableName string

	// FieldQuery is used to fetch field info
	FieldQuery *sqlparser.ParsedQuery