Line data Source code
1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef INCLUDED_CONNECTIVITY_DBMETADATA_HXX
21 : #define INCLUDED_CONNECTIVITY_DBMETADATA_HXX
22 :
23 : #include <com/sun/star/sdbc/XConnection.hpp>
24 : #include <com/sun/star/uno/XComponentContext.hpp>
25 :
26 : #include <memory>
27 : #include <connectivity/dbtoolsdllapi.hxx>
28 :
29 :
30 : namespace dbtools
31 : {
32 :
33 :
34 :
35 : //= DatabaseMetaData
36 :
37 : struct DatabaseMetaData_Impl;
38 : /** encapsulates meta data about a database/connection which cannot be obtained
39 : from the usual XDatabaseMetaData result set.
40 :
41 : Meta data perhaps isn't really the right term ... Some of the methods
42 : in this class involved heuristics, some are just a convenient wrapper
43 : around more complex ways to obtain the same information.
44 :
45 : @todo
46 : Once CWS dba30 is integrated, we could easily add all the meta data
47 : which is part of the "Info" property of a data source.
48 : */
49 : class OOO_DLLPUBLIC_DBTOOLS DatabaseMetaData
50 : {
51 : private:
52 : ::std::unique_ptr< DatabaseMetaData_Impl > m_pImpl;
53 :
54 : public:
55 : DatabaseMetaData();
56 : /** constructs a DatabaseMetaData instance
57 : @param _rxConnection
58 : is the connection whose meta data you're interested in.
59 : Note that some of the information provided by this class can only be obtained
60 : if this connection denotes an application-level connection, i.e. supports
61 : the com.sun.star.sdb.Connection service.
62 :
63 : @throws ::com::sun::star::lang::IllegalArgumentException
64 : if the given connection is not <NULL/>, but the XDatabaseMetaData provided by it
65 : are <NULL/>
66 : @throws ::com::sun::star::sdbc::SQLException
67 : if obtaining the meta data from the connection throws an SQLException
68 : @throws ::com::sun::star::uno::RuntimeException
69 : if obtaining the meta data from the connection throws an RuntimeException
70 : */
71 : DatabaseMetaData(
72 : const ::com::sun::star::uno::Reference< ::com::sun::star::sdbc::XConnection >& _connection );
73 : DatabaseMetaData( const DatabaseMetaData& _copyFrom );
74 : DatabaseMetaData& operator=( const DatabaseMetaData& _copyFrom );
75 :
76 : ~DatabaseMetaData();
77 :
78 : public:
79 : /** determines whether or not the instances is based on a valid connection
80 :
81 : As long as this method returns true<TRUE/>, you should expect all other
82 : methods throwing an SQLException when called.
83 : */
84 : bool isConnected() const;
85 :
86 : /** resets the instance so that it's based on a new connection
87 : */
88 4 : inline void reset( const ::com::sun::star::uno::Reference< ::com::sun::star::sdbc::XConnection >& _connection )
89 : {
90 4 : *this = DatabaseMetaData( _connection );
91 4 : }
92 :
93 : /// wraps XDatabaseMetaData::getIdentifierQuoteString
94 : const OUString& getIdentifierQuoteString() const;
95 :
96 : /// wraps XDatabaseMetaData::getCatalogSeparator
97 : const OUString& getCatalogSeparator() const;
98 :
99 : /** determines whether the database supports sub queries in the FROM part
100 : of a SELECT clause are supported.
101 : @throws ::com::sun::star::sdbc::SQLException
102 : with SQLState 08003 (connection does not exist) if the instances was
103 : default-constructed and does not have a connection, yet.
104 : */
105 : bool supportsSubqueriesInFrom() const;
106 :
107 : /** checks whether the database supports primary keys
108 :
109 : Since there's no dedicated API to ask a database for this, a heuristics needs to be applied.
110 : First, the <code>PrimaryKeySupport<code> settings of the data source is examined. If it is <TRUE/>
111 : or <FALSE/>, then value is returned. If it is <NULL/>, then the database meta data are examined
112 : for support of core SQL grammar, and the result is returned. The assumption is that a database/driver
113 : which supports core SQL grammar usually also supports primary keys, and vice versa. At least, experience
114 : shows this is true most of the time.
115 : */
116 : bool supportsPrimaryKeys() const;
117 :
118 : /** determines whether names in the database should be restricted to SQL-92 identifiers
119 :
120 : Effectively, this method checks the EnableSQL92Check property of the data source settings,
121 : if present.
122 : */
123 : bool restrictIdentifiersToSQL92() const;
124 :
125 : /** determines whether when generating SQL statements, an AS keyword should be generated
126 : before a correlation name.
127 :
128 : E.g., it determines whether <code>SELECT * FROM table AS correlation_name</code> or
129 : <code>SELECT * FROM table correlation_name</code> is generated.
130 : */
131 : bool generateASBeforeCorrelationName() const;
132 :
133 : /** should date time be escaped like '2001-01-01' => {D '2001-01-01' }
134 : */
135 : bool shouldEscapeDateTime() const;
136 :
137 : /** auto increment columns should be automatically used as primary key.
138 : */
139 : bool isAutoIncrementPrimaryKey() const;
140 :
141 : /** determines the syntax to use for boolean comparison predicates
142 :
143 : @see ::com::sun::star::sdb::BooleanComparisonMode
144 : */
145 : sal_Int32
146 : getBooleanComparisonMode() const;
147 :
148 : /** determines in relations are supported.
149 : *
150 : * \return <TRUE/> when relations are supported, otherwise <FALSE/>
151 : */
152 : bool supportsRelations() const;
153 :
154 : /** determines if column alias names can be used in the order by clause.
155 : *
156 : * \return <TRUE/> when relations are supported, otherwise <FALSE/>
157 : */
158 : bool supportsColumnAliasInOrderBy() const;
159 :
160 : /** determines whether user administration is supported for the database
161 :
162 : User administration support is controlled by the availability of the XUsersSupplier
163 : interface, and it returning a non-NULL users container.
164 :
165 : @param _rContext
166 : the component context we operate in. Might be needed to create the
167 : css.sdbc.DriverManager instance.
168 : */
169 : bool supportsUserAdministration( const css::uno::Reference<css::uno::XComponentContext>& _rContext ) const;
170 :
171 : /** determines whether in the application UI, empty table folders (aka catalogs/schemas) should be displayed
172 : */
173 : bool displayEmptyTableFolders() const;
174 :
175 : /** determines that threads are supported.
176 : *
177 : * \return <TRUE/> when threads are supported, otherwise <FALSE/>
178 : */
179 : bool supportsThreads() const;
180 : };
181 :
182 :
183 : } // namespace dbtools
184 :
185 :
186 : #endif // INCLUDED_CONNECTIVITY_DBMETADATA_HXX
187 :
188 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
