本文整理匯總了Golang中github.com/pingcap/tidb/kv.Retriever.Get方法的典型用法代碼示例。如果您正苦於以下問題：Golang Retriever.Get方法的具體用法？Golang Retriever.Get怎麽用？Golang Retriever.Get使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/pingcap/tidb/kv.Retriever的用法示例。
在下文中一共展示了Retriever.Get方法的4個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: rowWithCols
func rowWithCols(txn kv.Retriever, t table.Table, h int64, cols []*table.Column) ([]types.Datum, error) {
v := make([]types.Datum, len(cols))
for i, col := range cols {
if col.State != model.StatePublic {
return nil, errInvalidColumnState.Gen("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.Meta()) {
v[i].SetInt64(h)
continue
}
k := t.RecordKey(h, col)
data, err := txn.Get(k)
if terror.ErrorEqual(err, kv.ErrNotExist) && !mysql.HasNotNullFlag(col.Flag) {
continue
} else if err != nil {
return nil, errors.Trace(err)
}
val, err := tables.DecodeValue(data, &col.FieldType)
if err != nil {
return nil, errors.Trace(err)
}
v[i] = val
}
return v, nil
}示例2: rowWithCols
func rowWithCols(txn kv.Retriever, t table.Table, h int64, cols []*column.Col) ([]types.Datum, error) {
v := make([]types.Datum, len(cols))
for i, col := range cols {
if col.State != model.StatePublic {
return nil, errors.Errorf("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.Meta()) {
v[i].SetInt64(h)
continue
}
k := t.RecordKey(h, col)
data, err := txn.Get(k)
if err != nil {
return nil, errors.Trace(err)
}
val, err := tables.DecodeValue(data, &col.FieldType)
if err != nil {
return nil, errors.Trace(err)
}
v[i] = val
}
return v, nil
}示例3: RowWithCols
// RowWithCols implements table.Table RowWithCols interface.
func (t *Table) RowWithCols(retriever kv.Retriever, h int64, cols []*column.Col) ([]interface{}, error) {
v := make([]interface{}, len(cols))
for _, col := range cols {
if col.State != model.StatePublic {
return nil, errors.Errorf("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.meta) {
v[col.Offset] = h
continue
}
k := t.RecordKey(h, col)
data, err := retriever.Get(k)
if err != nil {
return nil, errors.Trace(err)
}
val, err := t.DecodeValue(data, col)
if err != nil {
return nil, errors.Trace(err)
}
v[col.Offset] = val
}
return v, nil
}示例4: rowWithCols
func rowWithCols(txn kv.Retriever, t table.Table, h int64, cols []*table.Column) ([]types.Datum, error) {
key := t.RecordKey(h)
value, err := txn.Get(key)
if err != nil {
return nil, errors.Trace(err)
}
v := make([]types.Datum, len(cols))
colTps := make(map[int64]*types.FieldType, len(cols))
for i, col := range cols {
if col == nil {
continue
}
if col.State != model.StatePublic {
return nil, errInvalidColumnState.Gen("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.Meta()) {
if mysql.HasUnsignedFlag(col.Flag) {
v[i].SetUint64(uint64(h))
} else {
v[i].SetInt64(h)
}
continue
}
colTps[col.ID] = &col.FieldType
}
row, err := tablecodec.DecodeRow(value, colTps)
if err != nil {
return nil, errors.Trace(err)
}
for i, col := range cols {
if col == nil {
continue
}
if col.State != model.StatePublic {
// TODO: check this
return nil, errInvalidColumnState.Gen("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.Meta()) {
continue
}
ri, ok := row[col.ID]
if !ok && mysql.HasNotNullFlag(col.Flag) {
return nil, errors.New("Miss")
}
v[i] = ri
}
return v, nil
}