本文整理匯總了Golang中github.com/cockroachdb/cockroach/internal/client.Batch.DelRange方法的典型用法代碼示例。如果您正苦於以下問題：Golang Batch.DelRange方法的具體用法？Golang Batch.DelRange怎麽用？Golang Batch.DelRange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/cockroachdb/cockroach/internal/client.Batch的用法示例。
在下文中一共展示了Batch.DelRange方法的2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: deleteRow
// deleteRow adds to the batch the kv operations necessary to delete a table row
// with the given values.
func (rd *rowDeleter) deleteRow(b *client.Batch, values []parser.Datum) error {
if err := rd.fks.checkAll(values); err != nil {
return err
}
primaryIndexKey, secondaryIndexEntries, err := rd.helper.encodeIndexes(rd.fetchColIDtoRowIndex, values)
if err != nil {
return err
}
for _, secondaryIndexEntry := range secondaryIndexEntries {
if log.V(2) {
log.Infof("Del %s", secondaryIndexEntry.Key)
}
b.Del(secondaryIndexEntry.Key)
}
// Delete the row.
rd.startKey = roachpb.Key(primaryIndexKey)
rd.endKey = roachpb.Key(encoding.EncodeNotNullDescending(primaryIndexKey))
if log.V(2) {
log.Infof("DelRange %s - %s", rd.startKey, rd.endKey)
}
b.DelRange(&rd.startKey, &rd.endKey, false)
rd.startKey, rd.endKey = nil, nil
return nil
}示例2: truncateTable
// truncateTable truncates the data of a table.
// It deletes a range of data for the table, which includes the PK and all
// indexes.
func truncateTable(tableDesc *sqlbase.TableDescriptor, txn *client.Txn) error {
tablePrefix := keys.MakeTablePrefix(uint32(tableDesc.ID))
// Delete rows and indexes starting with the table's prefix.
tableStartKey := roachpb.Key(tablePrefix)
tableEndKey := tableStartKey.PrefixEnd()
if log.V(2) {
log.Infof("DelRange %s - %s", tableStartKey, tableEndKey)
}
b := client.Batch{}
b.DelRange(tableStartKey, tableEndKey, false)
return txn.Run(&b)
}