| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.impl.sql.GenericStatement |
| 4 | |
| 5 | Copyright 1997, 2004 The Apache Software Foundation or its licensors, as applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | package org.apache.derby.impl.sql; |
| 22 | |
| 23 | import org.apache.derby.iapi.services.stream.HeaderPrintWriter; |
| 24 | |
| 25 | import org.apache.derby.iapi.reference.JDBC20Translation; |
| 26 | import org.apache.derby.iapi.reference.JDBC30Translation; |
| 27 | import org.apache.derby.iapi.reference.SQLState; |
| 28 | |
| 29 | import org.apache.derby.iapi.sql.Activation; |
| 30 | import org.apache.derby.iapi.types.DataTypeDescriptor; |
| 31 | import org.apache.derby.iapi.sql.ResultSet; |
| 32 | import org.apache.derby.iapi.sql.Statement; |
| 33 | import org.apache.derby.iapi.sql.PreparedStatement; |
| 34 | import org.apache.derby.iapi.sql.execute.ConstantAction; |
| 35 | import org.apache.derby.iapi.sql.execute.ExecutionContext; |
| 36 | import org.apache.derby.iapi.sql.execute.ExecPreparedStatement; |
| 37 | import org.apache.derby.iapi.sql.ParameterValueSet; |
| 38 | |
| 39 | import org.apache.derby.iapi.sql.conn.LanguageConnectionFactory; |
| 40 | import org.apache.derby.iapi.sql.conn.LanguageConnectionContext; |
| 41 | import org.apache.derby.iapi.sql.conn.StatementContext; |
| 42 | |
| 43 | import org.apache.derby.iapi.sql.depend.Dependent; |
| 44 | |
| 45 | import org.apache.derby.iapi.sql.compile.CompilerContext; |
| 46 | import org.apache.derby.iapi.sql.compile.NodeFactory; |
| 47 | import org.apache.derby.iapi.sql.compile.Parser; |
| 48 | |
| 49 | import org.apache.derby.impl.sql.compile.QueryTreeNode; |
| 50 | import org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext; |
| 51 | |
| 52 | import org.apache.derby.iapi.sql.dictionary.SchemaDescriptor; |
| 53 | import org.apache.derby.iapi.sql.dictionary.DataDictionaryContext; |
| 54 | import org.apache.derby.iapi.sql.dictionary.DataDictionary; |
| 55 | |
| 56 | import org.apache.derby.iapi.services.compiler.JavaFactory; |
| 57 | import org.apache.derby.iapi.services.uuid.UUIDFactory; |
| 58 | import org.apache.derby.iapi.util.ByteArray; |
| 59 | |
| 60 | import org.apache.derby.iapi.error.StandardException; |
| 61 | |
| 62 | import org.apache.derby.iapi.services.monitor.Monitor; |
| 63 | |
| 64 | import org.apache.derby.iapi.services.context.Context; |
| 65 | import org.apache.derby.iapi.services.context.ContextService; |
| 66 | import org.apache.derby.iapi.services.context.ContextManager; |
| 67 | import org.apache.derby.iapi.services.sanity.SanityManager; |
| 68 | |
| 69 | import org.apache.derby.iapi.services.loader.GeneratedClass; |
| 70 | |
| 71 | import java.sql.Timestamp; |
| 72 | import java.sql.SQLWarning; |
| 73 | |
| 74 | public class GenericStatement |
| 75 | implements Statement { |
| 76 | |
| 77 | // these fields define the identity of the statement |
| 78 | private final SchemaDescriptor compilationSchema; |
| 79 | private final String statementText; |
| 80 | private final boolean isForReadOnly; |
| 81 | private int prepareIsolationLevel; |
| 82 | private GenericPreparedStatement preparedStmt; |
| 83 | |
| 84 | /** |
| 85 | * Constructor for a Statement given the text of the statement in a String |
| 86 | * @param compilationSchema schema |
| 87 | * @param statementText The text of the statement |
| 88 | * @param isForReadOnly if the statement is opened with level CONCUR_READ_ONLY |
| 89 | */ |
| 90 | |
| 91 | public GenericStatement(SchemaDescriptor compilationSchema, String statementText, boolean isForReadOnly) |
| 92 | { |
| 93 | this.compilationSchema = compilationSchema; |
| 94 | this.statementText = statementText; |
| 95 | this.isForReadOnly = isForReadOnly; |
| 96 | } |
| 97 | |
| 98 | /* |
| 99 | * Statement interface |
| 100 | */ |
| 101 | |
| 102 | |
| 103 | /* RESOLVE: may need error checking, debugging code here */ |
| 104 | public PreparedStatement prepare(LanguageConnectionContext lcc) throws StandardException |
| 105 | { |
| 106 | /* |
| 107 | ** Note: don't reset state since this might be |
| 108 | ** a recompilation of an already prepared statement. |
| 109 | */ |
| 110 | return prepMinion(lcc, true, (Object[]) null, (SchemaDescriptor) null, false); |
| 111 | } |
| 112 | public PreparedStatement prepare(LanguageConnectionContext lcc, boolean forMetaData) throws StandardException |
| 113 | { |
| 114 | /* |
| 115 | ** Note: don't reset state since this might be |
| 116 | ** a recompilation of an already prepared statement. |
| 117 | */ |
| 118 | return prepMinion(lcc, true, (Object[]) null, (SchemaDescriptor) null, forMetaData); |
| 119 | } |
| 120 | |
| 121 | private PreparedStatement prepMinion(LanguageConnectionContext lcc, boolean cacheMe, Object[] paramDefaults, |
| 122 | SchemaDescriptor spsSchema, boolean internalSQL) |
| 123 | throws StandardException |
| 124 | { |
| 125 | |
| 126 | long beginTime = 0; |
| 127 | long parseTime = 0; |
| 128 | long bindTime = 0; |
| 129 | long optimizeTime = 0; |
| 130 | long generateTime = 0; |
| 131 | Timestamp beginTimestamp = null; |
| 132 | Timestamp endTimestamp = null; |
| 133 | StatementContext statementContext = null; |
| 134 | |
| 135 | // verify it isn't already prepared... |
| 136 | // if it is, and is valid, simply return that tree. |
| 137 | // if it is invalid, we will recompile now. |
| 138 | if (preparedStmt != null) { |
| 139 | if (preparedStmt.upToDate()) |
| 140 | return preparedStmt; |
| 141 | } |
| 142 | |
| 143 | // Clear the optimizer trace from the last statement |
| 144 | if (lcc.getOptimizerTrace()) |
| 145 | lcc.setOptimizerTraceOutput(getSource() + "\n"); |
| 146 | |
| 147 | beginTime = getCurrentTimeMillis(lcc); |
| 148 | /* beginTimestamp only meaningful if beginTime is meaningful. |
| 149 | * beginTime is meaningful if STATISTICS TIMING is ON. |
| 150 | */ |
| 151 | if (beginTime != 0) |
| 152 | { |
| 153 | beginTimestamp = new Timestamp(beginTime); |
| 154 | } |
| 155 | |
| 156 | /** set the prepare Isolaton from the LanguageConnectionContext now as |
| 157 | * we need to consider it in caching decisions |
| 158 | */ |
| 159 | prepareIsolationLevel = lcc.getPrepareIsolationLevel(); |
| 160 | |
| 161 | /* a note on statement caching: |
| 162 | * |
| 163 | * A GenericPreparedStatement (GPS) is only added it to the cache if the |
| 164 | * parameter cacheMe is set to TRUE when the GPS is created. |
| 165 | * |
| 166 | * Earlier only CacheStatement (CS) looked in the statement cache for a |
| 167 | * prepared statement when prepare was called. Now the functionality |
| 168 | * of CS has been folded into GenericStatement (GS). So we search the |
| 169 | * cache for an existing PreparedStatement only when cacheMe is TRUE. |
| 170 | * i.e if the user calls prepare with cacheMe set to TRUE: |
| 171 | * then we |
| 172 | * a) look for the prepared statement in the cache. |
| 173 | * b) add the prepared statement to the cache. |
| 174 | * |
| 175 | * In cases where the statement cache has been disabled (by setting the |
| 176 | * relevant cloudscape property) then the value of cacheMe is irrelevant. |
| 177 | */ |
| 178 | boolean foundInCache = false; |
| 179 | if (preparedStmt == null) |
| 180 | { |
| 181 | if (cacheMe) |
| 182 | preparedStmt = (GenericPreparedStatement)((GenericLanguageConnectionContext)lcc).lookupStatement(this); |
| 183 | |
| 184 | if (preparedStmt == null) |
| 185 | { |
| 186 | preparedStmt = new GenericPreparedStatement(this); |
| 187 | } |
| 188 | else |
| 189 | { |
| 190 | foundInCache = true; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | // if anyone else also has this prepared statement, |
| 195 | // we don't want them trying to compile with it while |
| 196 | // we are. So, we synchronize on it and re-check |
| 197 | // its validity first. |
| 198 | // this is a no-op if and until there is a central |
| 199 | // cache of prepared statement objects... |
| 200 | synchronized (preparedStmt) |
| 201 | { |
| 202 | |
| 203 | for (;;) { |
| 204 | |
| 205 | if (foundInCache) { |
| 206 | if (preparedStmt.referencesSessionSchema()) { |
| 207 | // cannot use this state since it is private to a connection. |
| 208 | // switch to a new statement. |
| 209 | foundInCache = false; |
| 210 | preparedStmt = new GenericPreparedStatement(this); |
| 211 | break; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | // did it get updated while we waited for the lock on it? |
| 216 | if (preparedStmt.upToDate()) { |
| 217 | return preparedStmt; |
| 218 | } |
| 219 | |
| 220 | if (!preparedStmt.compilingStatement) { |
| 221 | break; |
| 222 | } |
| 223 | |
| 224 | try { |
| 225 | preparedStmt.wait(); |
| 226 | } catch (InterruptedException ie) { |
| 227 | throw StandardException.interrupt(ie); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | preparedStmt.compilingStatement = true; |
| 232 | preparedStmt.setActivationClass(null); |
| 233 | } |
| 234 | |
| 235 | try { |
| 236 | |
| 237 | HeaderPrintWriter istream = lcc.getLogStatementText() ? Monitor.getStream() : null; |
| 238 | |
| 239 | /* |
| 240 | ** For stored prepared statements, we want all |
| 241 | ** errors, etc in the context of the underlying |
| 242 | ** EXECUTE STATEMENT statement, so don't push/pop |
| 243 | ** another statement context unless we don't have |
| 244 | ** one. We won't have one if it is an internal |
| 245 | ** SPS (e.g. jdbcmetadata). |
| 246 | */ |
| 247 | if (!preparedStmt.isStorable() || lcc.getStatementDepth() == 0) |
| 248 | { |
| 249 | // since this is for compilation only, set atomic |
| 250 | // param to true and timeout param to 0 |
| 251 | statementContext = lcc.pushStatementContext(true, isForReadOnly, getSource(), |
| 252 | null, false, 0L); |
| 253 | } |
| 254 | |
| 255 | |
| 256 | |
| 257 | /* |
| 258 | ** RESOLVE: we may ultimately wish to pass in |
| 259 | ** whether we are a jdbc metadata query or not to |
| 260 | ** get the CompilerContext to make the createDependency() |
| 261 | ** call a noop. |
| 262 | */ |
| 263 | CompilerContext cc = lcc.pushCompilerContext(compilationSchema); |
| 264 | |
| 265 | if (prepareIsolationLevel != |
| 266 | ExecutionContext.UNSPECIFIED_ISOLATION_LEVEL) |
| 267 | { |
| 268 | cc.setScanIsolationLevel(prepareIsolationLevel); |
| 269 | } |
| 270 | |
| 271 | |
| 272 | // Look for stored statements that are in a system schema |
| 273 | // and with a match compilation schema. If so, allow them |
| 274 | // to compile using internal SQL constructs. |
| 275 | |
| 276 | if (internalSQL || |
| 277 | (spsSchema != null) && (spsSchema.isSystemSchema()) && |
| 278 | (spsSchema.equals(compilationSchema))) { |
| 279 | cc.setReliability(CompilerContext.INTERNAL_SQL_LEGAL); |
| 280 | } |
| 281 | |
| 282 | try |
| 283 | { |
| 284 | // Statement logging if lcc.getLogStatementText() is true |
| 285 | if (istream != null) |
| 286 | { |
| 287 | String xactId = lcc.getTransactionExecute().getActiveStateTxIdString(); |
| 288 | istream.printlnWithHeader(LanguageConnectionContext.xidStr + |
| 289 | xactId + |
| 290 | "), " + |
| 291 | LanguageConnectionContext.lccStr + |
| 292 | lcc.getInstanceNumber() + |
| 293 | "), " + |
| 294 | LanguageConnectionContext.dbnameStr + |
| 295 | lcc.getDbname() + |
| 296 | "), " + |
| 297 | LanguageConnectionContext.drdaStr + |
| 298 | lcc.getDrdaID() + |
| 299 | "), Begin compiling prepared statement: " + |
| 300 | getSource() + |
| 301 | " :End prepared statement"); |
| 302 | } |
| 303 | |
| 304 | Parser p = cc.getParser(); |
| 305 | |
| 306 | cc.setCurrentDependent(preparedStmt); |
| 307 | |
| 308 | //Only top level statements go through here, nested statement |
| 309 | //will invoke this method from other places |
| 310 | QueryTreeNode qt = p.parseStatement(statementText, paramDefaults); |
| 311 | |
| 312 | parseTime = getCurrentTimeMillis(lcc); |
| 313 | |
| 314 | if (SanityManager.DEBUG) |
| 315 | { |
| 316 | if (SanityManager.DEBUG_ON("DumpParseTree")) |
| 317 | { |
| 318 | qt.treePrint(); |
| 319 | } |
| 320 | |
| 321 | if (SanityManager.DEBUG_ON("StopAfterParsing")) |
| 322 | { |
| 323 | throw StandardException.newException(SQLState.LANG_STOP_AFTER_PARSING); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | /* |
| 328 | ** Tell the data dictionary that we are about to do |
| 329 | ** a bunch of "get" operations that must be consistent with |
| 330 | ** each other. |
| 331 | */ |
| 332 | |
| 333 | DataDictionary dataDictionary = lcc.getDataDictionary(); |
| 334 | |
| 335 | int ddMode = dataDictionary == null ? 0 : dataDictionary.startReading(lcc); |
| 336 | |
| 337 | try |
| 338 | { |
| 339 | // start a nested transaction -- all locks acquired by bind |
| 340 | // and optimize will be released when we end the nested |
| 341 | // transaction. |
| 342 | lcc.beginNestedTransaction(true); |
| 343 | |
| 344 | qt = qt.bind(); |
| 345 | bindTime = getCurrentTimeMillis(lcc); |
| 346 | |
| 347 | if (SanityManager.DEBUG) |
| 348 | { |
| 349 | if (SanityManager.DEBUG_ON("DumpBindTree")) |
| 350 | { |
| 351 | qt.treePrint(); |
| 352 | } |
| 353 | |
| 354 | if (SanityManager.DEBUG_ON("StopAfterBinding")) { |
| 355 | throw StandardException.newException(SQLState.LANG_STOP_AFTER_BINDING); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | //Derby424 - In order to avoid caching select statements referencing |
| 360 | // any SESSION schema objects (including statements referencing views |
| 361 | // in SESSION schema), we need to do the SESSION schema object check |
| 362 | // here. |
| 363 | //a specific eg for statement referencing a view in SESSION schema |
| 364 | //CREATE TABLE t28A (c28 int) |
| 365 | //INSERT INTO t28A VALUES (280),(281) |
| 366 | //CREATE VIEW SESSION.t28v1 as select * from t28A |
| 367 | //SELECT * from SESSION.t28v1 should show contents of view and we |
| 368 | // should not cache this statement because a user can later define |
| 369 | // a global temporary table with the same name as the view name. |
| 370 | //Following demonstrates that |
| 371 | //DECLARE GLOBAL TEMPORARY TABLE SESSION.t28v1(c21 int, c22 int) not |
| 372 | // logged |
| 373 | //INSERT INTO SESSION.t28v1 VALUES (280,1),(281,2) |
| 374 | //SELECT * from SESSION.t28v1 should show contents of global temporary |
| 375 | //table and not the view. Since this select statement was not cached |
| 376 | // earlier, it will be compiled again and will go to global temporary |
| 377 | // table to fetch data. This plan will not be cached either because |
| 378 | // select statement is using SESSION schema object. |
| 379 | // |
| 380 | //Following if statement makes sure that if the statement is |
| 381 | // referencing SESSION schema objects, then we do not want to cache it. |
| 382 | // We will remove the entry that was made into the cache for |
| 383 | //this statement at the beginning of the compile phase. |
| 384 | //The reason we do this check here rather than later in the compile |
| 385 | // phase is because for a view, later on, we loose the information that |
| 386 | // it was referencing SESSION schema because the reference |
| 387 | //view gets replaced with the actual view definition. Right after |
| 388 | // binding, we still have the information on the view and that is why |
| 389 | // we do the check here. |
| 390 | if (preparedStmt.referencesSessionSchema(qt)) { |
| 391 | if (foundInCache) |
| 392 | ((GenericLanguageConnectionContext)lcc).removeStatement(this); |
| 393 | } |
| 394 | |
| 395 | qt = qt.optimize(); |
| 396 | |
| 397 | optimizeTime = getCurrentTimeMillis(lcc); |
| 398 | |
| 399 | // Statement logging if lcc.getLogStatementText() is true |
| 400 | if (istream != null) |
| 401 | { |
| 402 | String xactId = lcc.getTransactionExecute().getActiveStateTxIdString(); |
| 403 | istream.printlnWithHeader(LanguageConnectionContext.xidStr + |
| 404 | xactId + |
| 405 | "), " + |
| 406 | LanguageConnectionContext.lccStr + |
| 407 | lcc.getInstanceNumber() + |
| 408 | "), " + |
| 409 | LanguageConnectionContext.dbnameStr + |
| 410 | lcc.getDbname() + |
| 411 | "), " + |
| 412 | LanguageConnectionContext.drdaStr + |
| 413 | lcc.getDrdaID() + |
| 414 | "), End compiling prepared statement: " + |
| 415 | getSource() + |
| 416 | " :End prepared statement"); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | catch (StandardException se) |
| 421 | { |
| 422 | lcc.commitNestedTransaction(); |
| 423 | |
| 424 | // Statement logging if lcc.getLogStatementText() is true |
| 425 | if (istream != null) |
| 426 | { |
| 427 | String xactId = lcc.getTransactionExecute().getActiveStateTxIdString(); |
| 428 | istream.printlnWithHeader(LanguageConnectionContext.xidStr + |
| 429 | xactId + |
| 430 | "), " + |
| 431 | LanguageConnectionContext.lccStr + |
| 432 | lcc.getInstanceNumber() + |
| 433 | "), " + |
| 434 | LanguageConnectionContext.dbnameStr + |
| 435 | lcc.getDbname() + |
| 436 | "), " + |
| 437 | LanguageConnectionContext.drdaStr + |
| 438 | lcc.getDrdaID() + |
| 439 | "), Error compiling prepared statement: " + |
| 440 | getSource() + |
| 441 | " :End prepared statement"); |
| 442 | } |
| 443 | throw se; |
| 444 | } |
| 445 | |
| 446 | finally |
| 447 | { |
| 448 | /* Tell the data dictionary that we are done reading */ |
| 449 | if (dataDictionary != null) |
| 450 | dataDictionary.doneReading(ddMode, lcc); |
| 451 | } |
| 452 | |
| 453 | /* we need to move the commit of nested sub-transaction |
| 454 | * after we mark PS valid, during compilation, we might need |
| 455 | * to get some lock to synchronize with another thread's DDL |
| 456 | * execution, in particular, the compilation of insert/update/ |
| 457 | * delete vs. create index/constraint (see Beetle 3976). We |
| 458 | * can't release such lock until after we mark the PS valid. |
| 459 | * Otherwise we would just erase the DDL's invalidation when |
| 460 | * we mark it valid. |
| 461 | */ |
| 462 | try // put in try block, commit sub-transaction if bad |
| 463 | { |
| 464 | if (SanityManager.DEBUG) |
| 465 | { |
| 466 | if (SanityManager.DEBUG_ON("DumpOptimizedTree")) |
| 467 | { |
| 468 | qt.treePrint(); |
| 469 | } |
| 470 | |
| 471 | if (SanityManager.DEBUG_ON("StopAfterOptimizing")) |
| 472 | { |
| 473 | throw StandardException.newException(SQLState.LANG_STOP_AFTER_OPTIMIZING); |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | GeneratedClass ac = qt.generate(preparedStmt.getByteCodeSaver()); |
| 478 | |
| 479 | generateTime = getCurrentTimeMillis(lcc); |
| 480 | /* endTimestamp only meaningful if generateTime is meaningful. |
| 481 | * generateTime is meaningful if STATISTICS TIMING is ON. |
| 482 | */ |
| 483 | if (generateTime != 0) |
| 484 | { |
| 485 | endTimestamp = new Timestamp(generateTime); |
| 486 | } |
| 487 | |
| 488 | if (SanityManager.DEBUG) |
| 489 | { |
| 490 | if (SanityManager.DEBUG_ON("StopAfterGenerating")) |
| 491 | { |
| 492 | throw StandardException.newException(SQLState.LANG_STOP_AFTER_GENERATING); |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | /* |
| 497 | copy over the compile-time created objects |
| 498 | to the prepared statement. This always happens |
| 499 | at the end of a compile, so there is no need |
| 500 | to erase the previous entries on a re-compile -- |
| 501 | this erases as it replaces. Set the activation |
| 502 | class in case it came from a StorablePreparedStatement |
| 503 | */ |
| 504 | preparedStmt.setConstantAction( qt.makeConstantAction() ); |
| 505 | preparedStmt.setSavedObjects( cc.getSavedObjects() ); |
| 506 | preparedStmt.setRequiredPermissionsList(cc.getRequiredPermissionsList()); |
| 507 | preparedStmt.setActivationClass(ac); |
| 508 | preparedStmt.setNeedsSavepoint(qt.needsSavepoint()); |
| 509 | preparedStmt.setCursorInfo((CursorInfo)cc.getCursorInfo()); |
| 510 | preparedStmt.setIsAtomic(qt.isAtomic()); |
| 511 | preparedStmt.setExecuteStatementNameAndSchema( |
| 512 | qt.executeStatementName(), |
| 513 | qt.executeSchemaName() |
| 514 | ); |
| 515 | preparedStmt.setSPSName(qt.getSPSName()); |
| 516 | preparedStmt.completeCompile(qt); |
| 517 | preparedStmt.setCompileTimeWarnings(cc.getWarnings()); |
| 518 | } |
| 519 | catch (StandardException e) // hold it, throw it |
| 520 | { |
| 521 | lcc.commitNestedTransaction(); |
| 522 | throw e; |
| 523 | } |
| 524 | |
| 525 | if (lcc.getRunTimeStatisticsMode()) |
| 526 | { |
| 527 | preparedStmt.setCompileTimeMillis( |
| 528 | parseTime - beginTime, //parse time |
| 529 | bindTime - parseTime, //bind time |
| 530 | optimizeTime - bindTime, //optimize time |
| 531 | generateTime - optimizeTime, //generate time |
| 532 | getElapsedTimeMillis(beginTime), |
| 533 | beginTimestamp, |
| 534 | endTimestamp); |
| 535 | } |
| 536 | |
| 537 | } |
| 538 | finally // for block introduced by pushCompilerContext() |
| 539 | { |
| 540 | lcc.popCompilerContext( cc ); |
| 541 | } |
| 542 | } |
| 543 | catch (StandardException se) |
| 544 | { |
| 545 | if (foundInCache) |
| 546 | ((GenericLanguageConnectionContext)lcc).removeStatement(this); |
| 547 | throw se; |
| 548 | } |
| 549 | finally |
| 550 | { |
| 551 | synchronized (preparedStmt) { |
| 552 | preparedStmt.compilingStatement = false; |
| 553 | preparedStmt.notifyAll(); |
| 554 | } |
| 555 | } |
| 556 | |
| 557 | lcc.commitNestedTransaction(); |
| 558 | |
| 559 | if (statementContext != null) |
| 560 | lcc.popStatementContext(statementContext, null); |
| 561 | |
| 562 | return preparedStmt; |
| 563 | } |
| 564 | |
| 565 | /** |
| 566 | * Generates an execution plan given a set of named parameters. |
| 567 | * Does so for a storable prepared statement. |
| 568 | * |
| 569 | * @param paramDefaults Parameter defaults |
| 570 | * |
| 571 | * @return A PreparedStatement that allows execution of the execution |
| 572 | * plan. |
| 573 | * @exception StandardException Thrown if this is an |
| 574 | * execution-only version of the module (the prepare() method |
| 575 | * relies on compilation). |
| 576 | */ |
| 577 | public PreparedStatement prepareStorable( |
| 578 | LanguageConnectionContext lcc, |
| 579 | PreparedStatement ps, |
| 580 | Object[] paramDefaults, |
| 581 | SchemaDescriptor spsSchema, |
| 582 | boolean internalSQL) |
| 583 | throws StandardException |
| 584 | { |
| 585 | if (ps == null) |
| 586 | ps = new GenericStorablePreparedStatement(this); |
| 587 | else |
| 588 | ((GenericPreparedStatement) ps).statement = this; |
| 589 | |
| 590 | this.preparedStmt = (GenericPreparedStatement) ps; |
| 591 | return prepMinion(lcc, false, paramDefaults, spsSchema, internalSQL); |
| 592 | } |
| 593 | |
| 594 | public String getSource() { |
| 595 | return statementText; |
| 596 | } |
| 597 | |
| 598 | public String getCompilationSchema() { |
| 599 | return compilationSchema.getDescriptorName(); |
| 600 | } |
| 601 | |
| 602 | private static long getCurrentTimeMillis(LanguageConnectionContext lcc) |
| 603 | { |
| 604 | if (lcc.getStatisticsTiming()) |
| 605 | { |
| 606 | return System.currentTimeMillis(); |
| 607 | } |
| 608 | else |
| 609 | { |
| 610 | return 0; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | private static long getElapsedTimeMillis(long beginTime) |
| 615 | { |
| 616 | if (beginTime != 0) |
| 617 | { |
| 618 | return System.currentTimeMillis() - beginTime; |
| 619 | } |
| 620 | else |
| 621 | { |
| 622 | return 0; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | ** Identity |
| 628 | */ |
| 629 | |
| 630 | public boolean equals(Object other) { |
| 631 | |
| 632 | if (other instanceof GenericStatement) { |
| 633 | |
| 634 | GenericStatement os = (GenericStatement) other; |
| 635 | |
| 636 | return statementText.equals(os.statementText) && isForReadOnly==os.isForReadOnly |
| 637 | && compilationSchema.equals(os.compilationSchema) && |
| 638 | (prepareIsolationLevel == os.prepareIsolationLevel); |
| 639 | } |
| 640 | |
| 641 | return false; |
| 642 | } |
| 643 | |
| 644 | public int hashCode() { |
| 645 | |
| 646 | return statementText.hashCode(); |
| 647 | } |
| 648 | } |