001
014
015 package com.liferay.portal.dao.orm.common;
016
017 import com.liferay.portal.kernel.dao.db.DB;
018 import com.liferay.portal.kernel.dao.db.DBManagerUtil;
019 import com.liferay.portal.kernel.dao.db.DBType;
020 import com.liferay.portal.kernel.log.Log;
021 import com.liferay.portal.kernel.log.LogFactoryUtil;
022 import com.liferay.portal.kernel.util.CharPool;
023 import com.liferay.portal.kernel.util.StringBundler;
024 import com.liferay.portal.kernel.util.StringPool;
025 import com.liferay.portal.kernel.util.StringUtil;
026
027 import java.util.Map;
028 import java.util.concurrent.ConcurrentHashMap;
029 import java.util.regex.Matcher;
030 import java.util.regex.Pattern;
031
032
036 public class SQLTransformer {
037
038 public static void reloadSQLTransformer() {
039 _instance._reloadSQLTransformer();
040 }
041
042 public static String transform(String sql) {
043 return _instance._transform(sql);
044 }
045
046 public static String transformFromHqlToJpql(String sql) {
047 return _instance._transformFromHqlToJpql(sql);
048 }
049
050 public static String transformFromJpqlToHql(String sql) {
051 return _instance._transformFromJpqlToHql(sql);
052 }
053
054 private SQLTransformer() {
055 _reloadSQLTransformer();
056 }
057
058 private void _reloadSQLTransformer() {
059 if (_transformedSqls == null) {
060 _transformedSqls = new ConcurrentHashMap<>();
061 }
062 else {
063 _transformedSqls.clear();
064 }
065
066 _vendorDB2 = false;
067 _vendorHypersonic = false;
068 _vendorMySQL = false;
069 _vendorOracle = false;
070 _vendorPostgreSQL = false;
071 _vendorSQLServer = false;
072 _vendorSybase = false;
073
074 DB db = DBManagerUtil.getDB();
075
076 DBType dbType = db.getDBType();
077
078 _db = db;
079
080 if (dbType == DBType.DB2) {
081 _vendorDB2 = true;
082 }
083 else if (dbType == DBType.HYPERSONIC) {
084 _vendorHypersonic = true;
085 }
086 else if (dbType == DBType.MYSQL) {
087 _vendorMySQL = true;
088 }
089 else if (dbType == DBType.ORACLE) {
090 _vendorOracle = true;
091 }
092 else if (dbType == DBType.POSTGRESQL) {
093 _vendorPostgreSQL = true;
094 }
095 else if (dbType == DBType.SQLSERVER) {
096 _vendorSQLServer = true;
097 }
098 else if (dbType == DBType.SYBASE) {
099 _vendorSybase = true;
100 }
101 }
102
103 private String _removeLower(String sql) {
104 int x = sql.indexOf(_LOWER_OPEN);
105
106 if (x == -1) {
107 return sql;
108 }
109
110 StringBuilder sb = new StringBuilder(sql.length());
111
112 int y = 0;
113
114 while (true) {
115 sb.append(sql.substring(y, x));
116
117 y = sql.indexOf(_LOWER_CLOSE, x);
118
119 if (y == -1) {
120 sb.append(sql.substring(x));
121
122 break;
123 }
124
125 sb.append(sql.substring(x + _LOWER_OPEN.length(), y));
126
127 y++;
128
129 x = sql.indexOf(_LOWER_OPEN, y);
130
131 if (x == -1) {
132 sb.append(sql.substring(y));
133
134 break;
135 }
136 }
137
138 sql = sb.toString();
139
140 return sql;
141 }
142
143 private String _replaceBitwiseCheck(String sql) {
144 Matcher matcher = _bitwiseCheckPattern.matcher(sql);
145
146 if (_vendorMySQL || _vendorPostgreSQL || _vendorSQLServer ||
147 _vendorSybase) {
148
149 return matcher.replaceAll("($1 & $2)");
150 }
151 else {
152 return sql;
153 }
154 }
155
156 private String _replaceBoolean(String newSQL) {
157 return StringUtil.replace(
158 newSQL, new String[] {"[$FALSE$]", "[$TRUE$]"},
159 new String[] {_db.getTemplateFalse(), _db.getTemplateTrue()});
160 }
161
162 private String _replaceCastClobText(String sql) {
163 Matcher matcher = _castClobTextPattern.matcher(sql);
164
165 if (_vendorOracle) {
166 return matcher.replaceAll("DBMS_LOB.SUBSTR($1, 4000, 1)");
167 }
168
169 return _replaceCastText(matcher);
170 }
171
172 private String _replaceCastLong(String sql) {
173 Matcher matcher = _castLongPattern.matcher(sql);
174
175 if (_vendorHypersonic) {
176 return matcher.replaceAll("CONVERT($1, SQL_BIGINT)");
177 }
178 else if (_vendorSybase) {
179 return matcher.replaceAll("CONVERT(BIGINT, $1)");
180 }
181 else {
182 return matcher.replaceAll("$1");
183 }
184 }
185
186 private String _replaceCastText(Matcher matcher) {
187 if (_vendorDB2) {
188 return matcher.replaceAll("CAST($1 AS VARCHAR(254))");
189 }
190 else if (_vendorHypersonic) {
191 return matcher.replaceAll("CONVERT($1, SQL_VARCHAR)");
192 }
193 else if (_vendorOracle) {
194 return matcher.replaceAll("CAST($1 AS VARCHAR(4000))");
195 }
196 else if (_vendorPostgreSQL) {
197 return matcher.replaceAll("CAST($1 AS TEXT)");
198 }
199 else if (_vendorSQLServer) {
200 return matcher.replaceAll("CAST($1 AS NVARCHAR(MAX))");
201 }
202 else if (_vendorSybase) {
203 return matcher.replaceAll("CAST($1 AS NVARCHAR(5461))");
204 }
205 else {
206 return matcher.replaceAll("$1");
207 }
208 }
209
210 private String _replaceCastText(String sql) {
211 return _replaceCastText(_castTextPattern.matcher(sql));
212 }
213
214 private String _replaceCrossJoin(String sql) {
215 if (_vendorSybase) {
216 return StringUtil.replace(sql, "CROSS JOIN", StringPool.COMMA);
217 }
218
219 return sql;
220 }
221
222 private String _replaceEscape(String sql) {
223 return StringUtil.replace(sql, "LIKE ?", "LIKE ? ESCAPE '\\'");
224 }
225
226 private String _replaceIntegerDivision(String sql) {
227 Matcher matcher = _integerDivisionPattern.matcher(sql);
228
229 if (_vendorMySQL) {
230 return matcher.replaceAll("$1 DIV $2");
231 }
232 else if (_vendorOracle) {
233 return matcher.replaceAll("TRUNC($1 / $2)");
234 }
235 else {
236 return matcher.replaceAll("$1 / $2");
237 }
238 }
239
240 private String _replaceLike(String sql) {
241 Matcher matcher = _likePattern.matcher(sql);
242
243 return matcher.replaceAll(
244 "LIKE COALESCE(CAST(? AS VARCHAR(32672)),'')");
245 }
246
247 private String _replaceMod(String sql) {
248 Matcher matcher = _modPattern.matcher(sql);
249
250 return matcher.replaceAll("$1 % $2");
251 }
252
253 private String _replaceNegativeComparison(String sql) {
254 Matcher matcher = _negativeComparisonPattern.matcher(sql);
255
256 return matcher.replaceAll("$1 ($2)");
257 }
258
259 private String _replaceNotEqualsBlankStringComparison(String sql) {
260 return StringUtil.replace(sql, " != ''", " IS NOT NULL");
261 }
262
263 private String _replaceReplace(String newSQL) {
264 return newSQL.replaceAll("(?i)replace\\(", "str_replace(");
265 }
266
267 private String _transform(String sql) {
268 if (sql == null) {
269 return sql;
270 }
271
272 String newSQL = sql;
273
274 newSQL = _replaceBitwiseCheck(newSQL);
275 newSQL = _replaceBoolean(newSQL);
276 newSQL = _replaceCastClobText(newSQL);
277 newSQL = _replaceCastLong(newSQL);
278 newSQL = _replaceCastText(newSQL);
279 newSQL = _replaceCrossJoin(newSQL);
280 newSQL = _replaceIntegerDivision(newSQL);
281
282 if (_vendorDB2) {
283 newSQL = _replaceLike(newSQL);
284 }
285 else if (_vendorMySQL) {
286 DB db = DBManagerUtil.getDB();
287
288 if (!db.isSupportsStringCaseSensitiveQuery()) {
289 newSQL = _removeLower(newSQL);
290 }
291 }
292 else if (_vendorOracle) {
293 newSQL = _replaceEscape(newSQL);
294 newSQL = _replaceNotEqualsBlankStringComparison(newSQL);
295 }
296 else if (_vendorPostgreSQL) {
297 newSQL = _replaceNegativeComparison(newSQL);
298 }
299 else if (_vendorSQLServer) {
300 newSQL = _replaceMod(newSQL);
301 }
302 else if (_vendorSybase) {
303 newSQL = _replaceMod(newSQL);
304 newSQL = _replaceReplace(newSQL);
305 }
306
307 if (_log.isDebugEnabled()) {
308 _log.debug("Original SQL " + sql);
309 _log.debug("Modified SQL " + newSQL);
310 }
311
312 return newSQL;
313 }
314
315 private String _transformFromHqlToJpql(String sql) {
316 String newSQL = _transformedSqls.get(sql);
317
318 if (newSQL != null) {
319 return newSQL;
320 }
321
322 newSQL = _transform(sql);
323
324 newSQL = _transformPositionalParams(newSQL);
325
326 newSQL = StringUtil.replace(newSQL, _HQL_NOT_EQUALS, _JPQL_NOT_EQUALS);
327 newSQL = StringUtil.replace(
328 newSQL, _HQL_COMPOSITE_ID_MARKER, _JPQL_DOT_SEPARTOR);
329
330 _transformedSqls.put(sql, newSQL);
331
332 return newSQL;
333 }
334
335 private String _transformFromJpqlToHql(String sql) {
336 String newSQL = _transformedSqls.get(sql);
337
338 if (newSQL != null) {
339 return newSQL;
340 }
341
342 newSQL = _transform(sql);
343
344 Matcher matcher = _jpqlCountPattern.matcher(newSQL);
345
346 if (matcher.find()) {
347 String countExpression = matcher.group(1);
348 String entityAlias = matcher.group(3);
349
350 if (entityAlias.equals(countExpression)) {
351 newSQL = matcher.replaceFirst(_HQL_COUNT_SQL);
352 }
353 }
354
355 _transformedSqls.put(sql, newSQL);
356
357 return newSQL;
358 }
359
360 private String _transformPositionalParams(String queryString) {
361 if (queryString.indexOf(CharPool.QUESTION) == -1) {
362 return queryString;
363 }
364
365 StringBundler sb = new StringBundler();
366
367 int i = 1;
368 int from = 0;
369 int to = 0;
370
371 while ((to = queryString.indexOf(CharPool.QUESTION, from)) != -1) {
372 sb.append(queryString.substring(from, to));
373 sb.append(StringPool.QUESTION);
374 sb.append(i++);
375
376 from = to + 1;
377 }
378
379 sb.append(queryString.substring(from));
380
381 return sb.toString();
382 }
383
384 private static final String _HQL_COMPOSITE_ID_MARKER = "\\.id\\.";
385
386 private static final String _HQL_COUNT_SQL = "SELECT COUNT(*) FROM $2 $3";
387
388 private static final String _HQL_NOT_EQUALS = "!=";
389
390 private static final String _JPQL_DOT_SEPARTOR = ".";
391
392 private static final String _JPQL_NOT_EQUALS = "<>";
393
394 private static final String _LOWER_CLOSE = StringPool.CLOSE_PARENTHESIS;
395
396 private static final String _LOWER_OPEN = "lower(";
397
398 private static final Log _log = LogFactoryUtil.getLog(SQLTransformer.class);
399
400 private static final SQLTransformer _instance = new SQLTransformer();
401
402 private static final Pattern _bitwiseCheckPattern = Pattern.compile(
403 "BITAND\\((.+?),(.+?)\\)");
404 private static final Pattern _castClobTextPattern = Pattern.compile(
405 "CAST_CLOB_TEXT\\((.+?)\\)", Pattern.CASE_INSENSITIVE);
406 private static final Pattern _castLongPattern = Pattern.compile(
407 "CAST_LONG\\((.+?)\\)", Pattern.CASE_INSENSITIVE);
408 private static final Pattern _castTextPattern = Pattern.compile(
409 "CAST_TEXT\\((.+?)\\)", Pattern.CASE_INSENSITIVE);
410 private static final Pattern _integerDivisionPattern = Pattern.compile(
411 "INTEGER_DIV\\((.+?),(.+?)\\)", Pattern.CASE_INSENSITIVE);
412 private static final Pattern _jpqlCountPattern = Pattern.compile(
413 "SELECT COUNT\\((\\S+)\\) FROM (\\S+) (\\S+)");
414 private static final Pattern _likePattern = Pattern.compile(
415 "LIKE \\?", Pattern.CASE_INSENSITIVE);
416 private static final Pattern _modPattern = Pattern.compile(
417 "MOD\\((.+?),(.+?)\\)", Pattern.CASE_INSENSITIVE);
418 private static final Pattern _negativeComparisonPattern = Pattern.compile(
419 "(!?=)( -([0-9]+)?)", Pattern.CASE_INSENSITIVE);
420
421 private DB _db;
422 private Map<String, String> _transformedSqls;
423 private boolean _vendorDB2;
424 private boolean _vendorHypersonic;
425 private boolean _vendorMySQL;
426 private boolean _vendorOracle;
427 private boolean _vendorPostgreSQL;
428 private boolean _vendorSQLServer;
429 private boolean _vendorSybase;
430
431 }