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1
5 package org.h2.constraint;
6
7 import java.sql.SQLException  ;
8
9 import org.h2.engine.DbObject;
10 import org.h2.engine.Session;
11 import org.h2.index.Index;
12 import org.h2.message.Trace;
13 import org.h2.result.Row;
14 import org.h2.schema.Schema;
15 import org.h2.schema.SchemaObject;
16 import org.h2.table.Column;
17 import org.h2.table.Table;
18
19
22 public abstract class Constraint extends SchemaObject {
23
24 protected Table table;
25 public static final String CHECK = "CHECK", REFERENTIAL = "REFERENTIAL", UNIQUE = "UNIQUE";
26
27 public Constraint(Schema schema, int id, String name, Table table) {
28 super(schema, id, name, Trace.CONSTRAINT);
29 this.table = table;
30 this.setTemporary(table.getTemporary());
31 }
32
33 public void checkRename() throws SQLException {
34 }
36
37 public int getType() {
38 return DbObject.CONSTRAINT;
39 }
40
41 public abstract String getConstraintType();
42 public abstract void checkRow(Session session, Table t, Row oldRow, Row newRow) throws SQLException ;
43 public abstract boolean usesIndex(Index index);
44 public abstract boolean containsColumn(Column col);
45 public abstract String getCreateSQLWithoutIndexes();
46 public abstract boolean isBefore();
47 public abstract String getShortDescription();
48
49 public Table getTable() {
50 return table;
51 }
52
53 public Table getRefTable() {
54 return table;
55 }
56
57 }
58 |
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