1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 package org.apache.hadoop.hbase.master;
21
22 import org.apache.hadoop.fs.Path;
23 import org.apache.hadoop.hbase.HRegionInfo;
24 import org.apache.hadoop.hbase.ipc.HRegionInterface;
25 import org.apache.hadoop.hbase.regionserver.Store;
26
27 import java.io.IOException;
28
29
30 class DeleteColumn extends ColumnOperation {
31 private final byte [] columnName;
32
33 DeleteColumn(final HMaster master, final byte [] tableName,
34 final byte [] columnName)
35 throws IOException {
36 super(master, tableName);
37 this.columnName = columnName;
38 }
39
40 @Override
41 protected void postProcessMeta(MetaRegion m, HRegionInterface server)
42 throws IOException {
43 for (HRegionInfo i: unservedRegions) {
44 i.getTableDesc().removeFamily(columnName);
45 updateRegionInfo(server, m.getRegionName(), i);
46
47 Path tabledir =
48 new Path(this.master.getRootDir(), i.getTableDesc().getNameAsString());
49 this.master.getFileSystem().
50 delete(Store.getStoreHomedir(tabledir, i.getEncodedName(),
51 this.columnName), true);
52 }
53 }
54 }