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1
5 package org.h2.command.ddl;
6
7 import java.sql.SQLException  ;
8
9 import org.h2.engine.Database;
10 import org.h2.engine.Session;
11 import org.h2.message.Message;
12 import org.h2.schema.Constant;
13 import org.h2.schema.Schema;
14
15 public class DropConstant extends SchemaCommand {
16
17 private String constantName;
18 private boolean ifExists;
19
20 public DropConstant(Session session, Schema schema) {
21 super(session, schema);
22 }
23
24 public void setIfExists(boolean b) {
25 ifExists = b;
26 }
27
28 public void setConstantName(String constantName) {
29 this.constantName = constantName;
30 }
31
32 public int update() throws SQLException {
33 session.getUser().checkAdmin();
34 session.commit();
35 Database db = session.getDatabase();
36 Constant constant = getSchema().findConstant(constantName);
37 if(constant == null) {
38 if(!ifExists) {
39 throw Message.getSQLException(Message.CONSTANT_NOT_FOUND_1, constantName);
40 }
41 } else {
42 db.removeSchemaObject(session, constant);
43 }
44 return 0;
45 }
46
47 }
48 |
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