func analyzeInsert(ins *sqlparser.Insert, getTable TableGetter) (plan *ExecPlan, err error) {
plan = &ExecPlan{
PlanID: PlanPassDML,
FullQuery: GenerateFullQuery(ins),
}
tableName := sqlparser.GetTableName(ins.Table)
if tableName == "" {
plan.Reason = ReasonTable
return plan, nil
}
tableInfo, err := plan.setTableInfo(tableName, getTable)
if err != nil {
return nil, err
}
if len(tableInfo.Indexes) == 0 || tableInfo.Indexes[0].Name.Lowered() != "primary" {
log.Warningf("no primary key for table %s", tableName)
plan.Reason = ReasonTableNoIndex
return plan, nil
}
pkColumnNumbers := getInsertPKColumns(ins.Columns, tableInfo)
if sel, ok := ins.Rows.(sqlparser.SelectStatement); ok {
if ins.OnDup != nil {
// Upserts not allowed for subqueries.
// http://bugs.mysql.com/bug.php?id=58637
plan.Reason = ReasonUpsert
return plan, nil
}
plan.PlanID = PlanInsertSubquery
plan.OuterQuery = GenerateInsertOuterQuery(ins)
plan.Subquery = GenerateSelectLimitQuery(sel)
if len(ins.Columns) != 0 {
for _, col := range ins.Columns {
colIndex := tableInfo.FindColumn(col.Original())
if colIndex == -1 {
return nil, fmt.Errorf("column %v not found in table %s", col, tableInfo.Name)
}
plan.ColumnNumbers = append(plan.ColumnNumbers, colIndex)
}
} else {
// Add all columns.
for colIndex := range tableInfo.Columns {
plan.ColumnNumbers = append(plan.ColumnNumbers, colIndex)
}
}
plan.SubqueryPKColumns = pkColumnNumbers
return plan, nil
}
// If it's not a sqlparser.SelectStatement, it's Values.
rowList := ins.Rows.(sqlparser.Values)
pkValues, err := getInsertPKValues(pkColumnNumbers, rowList, tableInfo)
if err != nil {
return nil, err
}
if pkValues == nil {
plan.Reason = ReasonComplexExpr
return plan, nil
}
plan.PKValues = pkValues
if ins.OnDup == nil {
plan.PlanID = PlanInsertPK
plan.OuterQuery = sqlparser.GenerateParsedQuery(ins)
return plan, nil
}
if len(rowList) > 1 {
// Upsert supported only for single row inserts.
plan.Reason = ReasonUpsert
return plan, nil
}
plan.SecondaryPKValues, err = analyzeUpdateExpressions(sqlparser.UpdateExprs(ins.OnDup), tableInfo.Indexes[0])
if err != nil {
plan.Reason = ReasonPKChange
return plan, nil
}
plan.PlanID = PlanUpsertPK
newins := *ins
newins.Ignore = ""
newins.OnDup = nil
plan.OuterQuery = sqlparser.GenerateParsedQuery(&newins)
upd := &sqlparser.Update{
Comments: ins.Comments,
Table: ins.Table,
Exprs: sqlparser.UpdateExprs(ins.OnDup),
}
plan.UpsertQuery = GenerateUpdateOuterQuery(upd)
return plan, nil
}
func analyzeInsert(ins *sqlparser.Insert, getTable TableGetter) (plan *ExecPlan, err error) {
plan = &ExecPlan{
PlanID: PlanPassDML,
FullQuery: GenerateFullQuery(ins),
}
tableName := sqlparser.GetTableName(ins.Table)
if tableName == "" {
plan.Reason = ReasonTable
return plan, nil
}
tableInfo, err := plan.setTableInfo(tableName, getTable)
if err != nil {
return nil, err
}
if len(tableInfo.Indexes) == 0 || tableInfo.Indexes[0].Name != "PRIMARY" {
log.Warningf("no primary key for table %s", tableName)
plan.Reason = ReasonTableNoIndex
return plan, nil
}
pkColumnNumbers := getInsertPKColumns(ins.Columns, tableInfo)
if sel, ok := ins.Rows.(sqlparser.SelectStatement); ok {
if ins.OnDup != nil {
// Upserts not allowed for subqueries.
// http://bugs.mysql.com/bug.php?id=58637
plan.Reason = ReasonUpsert
return plan, nil
}
plan.PlanID = PlanInsertSubquery
plan.OuterQuery = GenerateInsertOuterQuery(ins)
plan.Subquery = GenerateSelectLimitQuery(sqlparser.ForUpdate(sel))
if len(ins.Columns) != 0 {
plan.ColumnNumbers, err = analyzeSelectExprs(sqlparser.SelectExprs(ins.Columns), tableInfo)
if err != nil {
return nil, err
}
} else {
// StarExpr node will expand into all columns
n := sqlparser.SelectExprs{&sqlparser.StarExpr{}}
plan.ColumnNumbers, err = analyzeSelectExprs(n, tableInfo)
if err != nil {
return nil, err
}
}
plan.SubqueryPKColumns = pkColumnNumbers
return plan, nil
}
// If it's not a sqlparser.SelectStatement, it's Values.
rowList := ins.Rows.(sqlparser.Values)
pkValues, err := getInsertPKValues(pkColumnNumbers, rowList, tableInfo)
if err != nil {
return nil, err
}
if pkValues == nil {
plan.Reason = ReasonComplexExpr
return plan, nil
}
plan.PKValues = pkValues
if ins.OnDup == nil {
plan.PlanID = PlanInsertPK
plan.OuterQuery = sqlparser.GenerateParsedQuery(ins)
return plan, nil
}
if len(rowList) > 1 {
// Upsert supported only for single row inserts.
plan.Reason = ReasonUpsert
return plan, nil
}
plan.SecondaryPKValues, err = analyzeUpdateExpressions(sqlparser.UpdateExprs(ins.OnDup), tableInfo.Indexes[0])
if err != nil {
if err == ErrTooComplex {
plan.Reason = ReasonPKChange
return plan, nil
}
return nil, err
}
plan.PlanID = PlanUpsertPK
newins := *ins
newins.Ignore = ""
newins.OnDup = nil
plan.OuterQuery = sqlparser.GenerateParsedQuery(&newins)
upd := &sqlparser.Update{
Comments: ins.Comments,
Table: ins.Table,
Exprs: sqlparser.UpdateExprs(ins.OnDup),
}
plan.UpsertQuery = GenerateUpdateOuterQuery(upd)
return plan, nil
}