001
014
015 package com.liferay.portal.dao.db;
016
017 import com.liferay.portal.kernel.dao.db.DBType;
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.StringPool;
024 import com.liferay.portal.kernel.util.StringUtil;
025
026 import java.io.IOException;
027
028 import java.sql.Connection;
029 import java.sql.PreparedStatement;
030 import java.sql.ResultSet;
031 import java.sql.SQLException;
032
033 import java.util.ArrayList;
034 import java.util.List;
035
036
041 public class PostgreSQLDB extends BaseDB {
042
043 public static String getCreateRulesSQL(
044 String tableName, String columnName) {
045
046 StringBundler sb = new StringBundler(45);
047
048 sb.append("create or replace rule delete_");
049 sb.append(tableName);
050 sb.append(StringPool.UNDERLINE);
051 sb.append(columnName);
052 sb.append(" as on delete to ");
053 sb.append(tableName);
054 sb.append(" do also select case when exists(select 1 from ");
055 sb.append("pg_catalog.pg_largeobject where (loid = old.");
056 sb.append(columnName);
057 sb.append(")) then lo_unlink(old.");
058 sb.append(columnName);
059 sb.append(") end from ");
060 sb.append(tableName);
061 sb.append(" where ");
062 sb.append(tableName);
063 sb.append(StringPool.PERIOD);
064 sb.append(columnName);
065 sb.append(" = old.");
066 sb.append(columnName);
067
068 sb.append(";\ncreate or replace rule update_");
069 sb.append(tableName);
070 sb.append(StringPool.UNDERLINE);
071 sb.append(columnName);
072 sb.append(" as on update to ");
073 sb.append(tableName);
074 sb.append(" where old.");
075 sb.append(columnName);
076 sb.append(" is distinct from new.");
077 sb.append(columnName);
078 sb.append(" and old.");
079 sb.append(columnName);
080 sb.append(" is not null do also select case when exists(select 1 ");
081 sb.append("from pg_catalog.pg_largeobject where (loid = old.");
082 sb.append(columnName);
083 sb.append(")) then lo_unlink(old.");
084 sb.append(columnName);
085 sb.append(") end from ");
086 sb.append(tableName);
087 sb.append(" where ");
088 sb.append(tableName);
089 sb.append(StringPool.PERIOD);
090 sb.append(columnName);
091 sb.append(" = old.");
092 sb.append(columnName);
093 sb.append(StringPool.SEMICOLON);
094
095 return sb.toString();
096 }
097
098 public PostgreSQLDB(int majorVersion, int minorVersion) {
099 super(DBType.POSTGRESQL, majorVersion, minorVersion);
100 }
101
102 @Override
103 public String buildSQL(String template) throws IOException {
104 template = convertTimestamp(template);
105 template = replaceTemplate(template, getTemplate());
106
107 template = reword(template);
108
109 return template;
110 }
111
112 @Override
113 public List<Index> getIndexes(Connection con) throws SQLException {
114 List<Index> indexes = new ArrayList<>();
115
116 PreparedStatement ps = null;
117 ResultSet rs = null;
118
119 try {
120 StringBundler sb = new StringBundler(3);
121
122 sb.append("select indexname, tablename, indexdef from pg_indexes ");
123 sb.append("where indexname like 'liferay_%' or indexname like ");
124 sb.append("'ix_%'");
125
126 String sql = sb.toString();
127
128 ps = con.prepareStatement(sql);
129
130 rs = ps.executeQuery();
131
132 while (rs.next()) {
133 String indexName = rs.getString("indexname");
134 String tableName = rs.getString("tablename");
135 String indexSQL = StringUtil.toLowerCase(
136 rs.getString("indexdef").trim());
137
138 boolean unique = true;
139
140 if (indexSQL.startsWith("create index ")) {
141 unique = false;
142 }
143
144 indexes.add(new Index(indexName, tableName, unique));
145 }
146 }
147 finally {
148 DataAccess.cleanUp(ps, rs);
149 }
150
151 return indexes;
152 }
153
154 @Override
155 public boolean isSupportsQueryingAfterException() {
156 return _SUPPORTS_QUERYING_AFTER_EXCEPTION;
157 }
158
159 @Override
160 protected String buildCreateFileContent(
161 String sqlDir, String databaseName, int population)
162 throws IOException {
163
164 String suffix = getSuffix(population);
165
166 StringBundler sb = new StringBundler(14);
167
168 sb.append("drop database ");
169 sb.append(databaseName);
170 sb.append(";\n");
171 sb.append("create database ");
172 sb.append(databaseName);
173 sb.append(" encoding = 'UNICODE';\n");
174
175 if (population != BARE) {
176 sb.append("\\c ");
177 sb.append(databaseName);
178 sb.append(";\n\n");
179 sb.append(getCreateTablesContent(sqlDir, suffix));
180 sb.append("\n\n");
181 sb.append(readFile(sqlDir + "/indexes/indexes-postgresql.sql"));
182 sb.append("\n\n");
183 sb.append(readFile(sqlDir + "/sequences/sequences-postgresql.sql"));
184 }
185
186 return sb.toString();
187 }
188
189 @Override
190 protected String getServerName() {
191 return "postgresql";
192 }
193
194 @Override
195 protected String[] getTemplate() {
196 return _POSTGRESQL;
197 }
198
199 @Override
200 protected String reword(String data) throws IOException {
201 try (UnsyncBufferedReader unsyncBufferedReader =
202 new UnsyncBufferedReader(new UnsyncStringReader(data))) {
203
204 StringBundler sb = new StringBundler();
205
206 StringBundler createRulesSQLSB = new StringBundler();
207 String line = null;
208 String tableName = null;
209
210 while ((line = unsyncBufferedReader.readLine()) != null) {
211 if (line.startsWith(ALTER_COLUMN_NAME)) {
212 String[] template = buildColumnNameTokens(line);
213
214 line = StringUtil.replace(
215 "alter table @table@ rename @old-column@ to " +
216 "@new-column@;",
217 REWORD_TEMPLATE, template);
218 }
219 else if (line.startsWith(ALTER_COLUMN_TYPE)) {
220 String[] template = buildColumnTypeTokens(line);
221
222 line = StringUtil.replace(
223 "alter table @table@ alter @old-column@ type @type@ " +
224 "using @old-column@::@type@;",
225 REWORD_TEMPLATE, template);
226 }
227 else if (line.startsWith(ALTER_TABLE_NAME)) {
228 String[] template = buildTableNameTokens(line);
229
230 line = StringUtil.replace(
231 "alter table @old-table@ rename to @new-table@;",
232 RENAME_TABLE_TEMPLATE, template);
233 }
234 else if (line.startsWith(CREATE_TABLE)) {
235 String[] tokens = StringUtil.split(line, ' ');
236
237 tableName = tokens[2];
238 }
239 else if (line.contains(DROP_INDEX)) {
240 String[] tokens = StringUtil.split(line, ' ');
241
242 line = StringUtil.replace(
243 "drop index @index@;", "@index@", tokens[2]);
244 }
245 else if (line.contains(DROP_PRIMARY_KEY)) {
246 String[] tokens = StringUtil.split(line, ' ');
247
248 line = StringUtil.replace(
249 "alter table @table@ drop constraint @table@_pkey;",
250 "@table@", tokens[2]);
251 }
252 else if (line.contains(getTemplateBlob())) {
253 String[] tokens = StringUtil.split(line, ' ');
254
255 createRulesSQLSB.append(StringPool.NEW_LINE);
256 createRulesSQLSB.append(
257 getCreateRulesSQL(tableName, tokens[0]));
258 }
259 else if (line.contains("\\\'")) {
260 line = StringUtil.replace(line, "\\\'", "\'\'");
261 }
262
263 sb.append(line);
264 sb.append("\n");
265 }
266
267 sb.append(createRulesSQLSB.toString());
268
269 return sb.toString();
270 }
271 }
272
273 private static final String[] _POSTGRESQL = {
274 "--", "true", "false", "'01/01/1970'", "current_timestamp", " oid",
275 " bytea", " bool", " timestamp", " double precision", " integer",
276 " bigint", " text", " text", " varchar", "", "commit"
277 };
278
279 private static final boolean _SUPPORTS_QUERYING_AFTER_EXCEPTION = false;
280
281 }