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1
5 package org.h2.index;
6
7 import java.sql.SQLException  ;
8
9 import org.h2.engine.Session;
10 import org.h2.message.Message;
11 import org.h2.result.Row;
12 import org.h2.result.SearchRow;
13 import org.h2.table.Column;
14 import org.h2.table.MetaTable;
15 import org.h2.util.ObjectArray;
16 import org.h2.value.Value;
17
18
19
22
23 public class MetaIndex extends Index {
24
25 private MetaTable meta;
26 private boolean scan;
27
28 public MetaIndex(MetaTable meta, Column[] columns, boolean scan) {
29 super(meta, 0, null, columns, IndexType.createNonUnique(true));
30 this.meta = meta;
31 this.scan = scan;
32 }
33
34 public void close(Session session) throws SQLException {
35 }
37
38 public void add(Session session, Row row) throws SQLException {
39 throw Message.getUnsupportedException();
40 }
41
42 public void remove(Session session, Row row) throws SQLException {
43 throw Message.getUnsupportedException();
44 }
45
46 public Cursor find(Session session, SearchRow first, SearchRow last) throws SQLException {
47 ObjectArray rows = meta.generateRows(session, first, last);
48 return new MetaCursor(rows);
49 }
50
51 public int getCost(int[] masks) throws SQLException {
52 if(scan) {
53 return 10000;
54 }
55 return getCostRangeIndex(masks, 1000);
56 }
57
58 public void truncate(Session session) throws SQLException {
59 throw Message.getUnsupportedException();
60 }
61
62 public void remove(Session session) throws SQLException {
63 throw Message.getUnsupportedException();
64 }
65
66 public int getColumnIndex(Column col) {
67 if(scan) {
68 return -1;
70 }
71 return super.getColumnIndex(col);
72 }
73
74 public void checkRename() throws SQLException {
75 throw Message.getUnsupportedException();
76 }
77
78 public boolean needRebuild() {
79 return false;
80 }
81
82 public String getCreateSQL() {
83 return null;
84 }
85
86 public boolean canGetFirstOrLast(boolean first) {
87 return false;
88 }
89
90 public Value findFirstOrLast(Session session, boolean first) throws SQLException {
91 throw Message.getUnsupportedException();
92 }
93
94 }
95 |
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