001
014
015 package com.liferay.portal.dao.db;
016
017 import com.liferay.portal.kernel.dao.db.DB;
018 import com.liferay.portal.kernel.dao.db.Index;
019 import com.liferay.portal.kernel.dao.jdbc.DataAccess;
020 import com.liferay.portal.kernel.io.unsync.UnsyncBufferedReader;
021 import com.liferay.portal.kernel.io.unsync.UnsyncStringReader;
022 import com.liferay.portal.kernel.util.StringBundler;
023 import com.liferay.portal.kernel.util.StringUtil;
024
025 import java.io.IOException;
026
027 import java.sql.Connection;
028 import java.sql.PreparedStatement;
029 import java.sql.ResultSet;
030 import java.sql.SQLException;
031
032 import java.util.ArrayList;
033 import java.util.List;
034
035
040 public class PostgreSQLDB extends BaseDB {
041
042 public static DB getInstance() {
043 return _instance;
044 }
045
046 @Override
047 public String buildSQL(String template) throws IOException {
048 template = convertTimestamp(template);
049 template = replaceTemplate(template, getTemplate());
050
051 template = reword(template);
052
053 return template;
054 }
055
056 @Override
057 public List<Index> getIndexes(Connection con) throws SQLException {
058 List<Index> indexes = new ArrayList<Index>();
059
060 PreparedStatement ps = null;
061 ResultSet rs = null;
062
063 try {
064 StringBundler sb = new StringBundler(3);
065
066 sb.append("select indexname, tablename, indexdef from pg_indexes ");
067 sb.append("where indexname like 'liferay_%' or indexname like ");
068 sb.append("'ix_%'");
069
070 String sql = sb.toString();
071
072 ps = con.prepareStatement(sql);
073
074 rs = ps.executeQuery();
075
076 while (rs.next()) {
077 String indexName = rs.getString("indexname");
078 String tableName = rs.getString("tablename");
079 String indexSQL = rs.getString("indexdef").toLowerCase().trim();
080
081 boolean unique = true;
082
083 if (indexSQL.startsWith("create index ")) {
084 unique = false;
085 }
086
087 indexes.add(new Index(indexName, tableName, unique));
088 }
089 }
090 finally {
091 DataAccess.cleanUp(null, ps, rs);
092 }
093
094 return indexes;
095 }
096
097 @Override
098 public boolean isSupportsQueryingAfterException() {
099 return _SUPPORTS_QUERYING_AFTER_EXCEPTION;
100 }
101
102 protected PostgreSQLDB() {
103 super(TYPE_POSTGRESQL);
104 }
105
106 @Override
107 protected String buildCreateFileContent(
108 String sqlDir, String databaseName, int population)
109 throws IOException {
110
111 String suffix = getSuffix(population);
112
113 StringBundler sb = new StringBundler(14);
114
115 sb.append("drop database ");
116 sb.append(databaseName);
117 sb.append(";\n");
118 sb.append("create database ");
119 sb.append(databaseName);
120 sb.append(" encoding = 'UNICODE';\n");
121 sb.append("\\c ");
122 sb.append(databaseName);
123 sb.append(";\n\n");
124 sb.append(getCreateTablesContent(sqlDir, suffix));
125 sb.append("\n\n");
126 sb.append(readFile(sqlDir + "/indexes/indexes-postgresql.sql"));
127 sb.append("\n\n");
128 sb.append(readFile(sqlDir + "/sequences/sequences-postgresql.sql"));
129
130 return sb.toString();
131 }
132
133 @Override
134 protected String getServerName() {
135 return "postgresql";
136 }
137
138 @Override
139 protected String[] getTemplate() {
140 return _POSTGRESQL;
141 }
142
143 @Override
144 protected String reword(String data) throws IOException {
145 UnsyncBufferedReader unsyncBufferedReader = new UnsyncBufferedReader(
146 new UnsyncStringReader(data));
147
148 StringBundler sb = new StringBundler();
149
150 String line = null;
151
152 while ((line = unsyncBufferedReader.readLine()) != null) {
153 if (line.startsWith(ALTER_COLUMN_NAME)) {
154 String[] template = buildColumnNameTokens(line);
155
156 line = StringUtil.replace(
157 "alter table @table@ rename @old-column@ to @new-column@;",
158 REWORD_TEMPLATE, template);
159 }
160 else if (line.startsWith(ALTER_COLUMN_TYPE)) {
161 String[] template = buildColumnTypeTokens(line);
162
163 line = StringUtil.replace(
164 "alter table @table@ alter @old-column@ type @type@ " +
165 "using @old-column@::@type@;",
166 REWORD_TEMPLATE, template);
167 }
168 else if (line.startsWith(ALTER_TABLE_NAME)) {
169 String[] template = buildTableNameTokens(line);
170
171 line = StringUtil.replace(
172 "alter table @old-table@ rename to @new-table@;",
173 RENAME_TABLE_TEMPLATE, template);
174 }
175 else if (line.contains(DROP_INDEX)) {
176 String[] tokens = StringUtil.split(line, ' ');
177
178 line = StringUtil.replace(
179 "drop index @index@;", "@index@", tokens[2]);
180 }
181 else if (line.contains(DROP_PRIMARY_KEY)) {
182 String[] tokens = StringUtil.split(line, ' ');
183
184 line = StringUtil.replace(
185 "alter table @table@ drop constraint @table@_pkey;",
186 "@table@", tokens[2]);
187 }
188 else if (line.contains("\\\'")) {
189 line = StringUtil.replace(line, "\\\'", "\'\'");
190 }
191
192 sb.append(line);
193 sb.append("\n");
194 }
195
196 unsyncBufferedReader.close();
197
198 return sb.toString();
199 }
200
201 private static final String[] _POSTGRESQL = {
202 "--", "true", "false", "'01/01/1970'", "current_timestamp", " oid",
203 " bytea", " bool", " timestamp", " double precision", " integer",
204 " bigint", " text", " text", " varchar", "", "commit"
205 };
206
207 private static final boolean _SUPPORTS_QUERYING_AFTER_EXCEPTION = false;
208
209 private static PostgreSQLDB _instance = new PostgreSQLDB();
210
211 }