1 | /* |
2 | * Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0, |
3 | * and the EPL 1.0 (http://h2database.com/html/license.html). |
4 | * Initial Developer: H2 Group |
5 | */ |
6 | package org.h2.command.ddl; |
7 | |
8 | import org.h2.api.ErrorCode; |
9 | import org.h2.command.CommandInterface; |
10 | import org.h2.engine.Database; |
11 | import org.h2.engine.FunctionAlias; |
12 | import org.h2.engine.Session; |
13 | import org.h2.message.DbException; |
14 | import org.h2.schema.Schema; |
15 | |
16 | /** |
17 | * This class represents the statement |
18 | * DROP ALIAS |
19 | */ |
20 | public class DropFunctionAlias extends SchemaCommand { |
21 | |
22 | private String aliasName; |
23 | private boolean ifExists; |
24 | |
25 | public DropFunctionAlias(Session session, Schema schema) { |
26 | super(session, schema); |
27 | } |
28 | |
29 | @Override |
30 | public int update() { |
31 | session.getUser().checkAdmin(); |
32 | session.commit(true); |
33 | Database db = session.getDatabase(); |
34 | FunctionAlias functionAlias = getSchema().findFunction(aliasName); |
35 | if (functionAlias == null) { |
36 | if (!ifExists) { |
37 | throw DbException.get(ErrorCode.FUNCTION_ALIAS_NOT_FOUND_1, aliasName); |
38 | } |
39 | } else { |
40 | db.removeSchemaObject(session, functionAlias); |
41 | } |
42 | return 0; |
43 | } |
44 | |
45 | public void setAliasName(String name) { |
46 | this.aliasName = name; |
47 | } |
48 | |
49 | public void setIfExists(boolean ifExists) { |
50 | this.ifExists = ifExists; |
51 | } |
52 | |
53 | @Override |
54 | public int getType() { |
55 | return CommandInterface.DROP_ALIAS; |
56 | } |
57 | |
58 | } |