| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.impl.jdbc.EmbedStatement |
| 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.jdbc; |
| 22 | |
| 23 | import org.apache.derby.iapi.reference.JDBC20Translation; |
| 24 | import org.apache.derby.iapi.reference.JDBC30Translation; |
| 25 | import org.apache.derby.iapi.reference.SQLState; |
| 26 | |
| 27 | import org.apache.derby.iapi.services.sanity.SanityManager; |
| 28 | |
| 29 | import org.apache.derby.iapi.sql.Activation; |
| 30 | import org.apache.derby.iapi.sql.PreparedStatement; |
| 31 | import org.apache.derby.iapi.sql.ResultSet; |
| 32 | import org.apache.derby.iapi.sql.ParameterValueSet; |
| 33 | import org.apache.derby.iapi.sql.conn.LanguageConnectionContext; |
| 34 | import org.apache.derby.iapi.error.StandardException; |
| 35 | import org.apache.derby.iapi.jdbc.EngineStatement; |
| 36 | |
| 37 | import java.sql.SQLException; |
| 38 | import java.sql.SQLWarning; |
| 39 | import java.util.Vector; |
| 40 | |
| 41 | /* |
| 42 | We would import these, but have name-overlap |
| 43 | import java.sql.Statement; |
| 44 | import java.sql.ResultSet; |
| 45 | */ |
| 46 | |
| 47 | /** |
| 48 | * |
| 49 | * EmbedStatement is a local JDBC statement. |
| 50 | * |
| 51 | <P><B>Supports</B> |
| 52 | <UL> |
| 53 | <LI> JSR169 - no subsetting for java.sql.Statement |
| 54 | <LI> JDBC 2.0 |
| 55 | <LI> JDBC 3.0 - no new dependencies on new JDBC 3.0 or JDK 1.4 classes, |
| 56 | new methods can safely be added into implementation. |
| 57 | </UL> |
| 58 | |
| 59 | * @author ames |
| 60 | */ |
| 61 | public class EmbedStatement extends ConnectionChild |
| 62 | implements EngineStatement { |
| 63 | |
| 64 | private final java.sql.Connection applicationConnection; |
| 65 | |
| 66 | /** |
| 67 | * Statement reference the application is using to execute |
| 68 | * this Statement. Normally set to this, but if this was |
| 69 | * created by a Connection from an XAConnection then this |
| 70 | * will be a reference to the BrokeredStatement. |
| 71 | * |
| 72 | * Making it protected to allow access from EmbedPreparedStatement40 |
| 73 | * to be used for StatementEvents |
| 74 | * |
| 75 | */ |
| 76 | protected EngineStatement applicationStatement; |
| 77 | |
| 78 | int updateCount = -1; |
| 79 | java.sql.ResultSet results; |
| 80 | //for jdbc3.0 feature, where you can get a resultset of rows inserted |
| 81 | //for auto generated columns after an insert |
| 82 | private java.sql.ResultSet autoGeneratedKeysResultSet; |
| 83 | private String cursorName; |
| 84 | |
| 85 | private final boolean forMetaData; |
| 86 | final int resultSetType; |
| 87 | private final int resultSetConcurrency; |
| 88 | private final int resultSetHoldability; |
| 89 | final LanguageConnectionContext lcc; |
| 90 | |
| 91 | private SQLWarning warnings; |
| 92 | String SQLText; |
| 93 | |
| 94 | private int fetchSize = 1; |
| 95 | private int fetchDirection = JDBC20Translation.FETCH_FORWARD; |
| 96 | int MaxFieldSize; |
| 97 | private int timeoutSeconds; |
| 98 | |
| 99 | //the state of this statement, set to false when close() is called |
| 100 | private boolean active = true; |
| 101 | |
| 102 | //in case of batch update, save the individual statements in the batch in this vector |
| 103 | //this is only used by JDBC 2.0 |
| 104 | Vector batchStatements; |
| 105 | |
| 106 | // The maximum # of rows to return per result set. |
| 107 | // (0 means no limit.) |
| 108 | int maxRows; |
| 109 | |
| 110 | private ParameterValueSet pvs; |
| 111 | |
| 112 | // An EmbedStatement is NOT poolable by default. The constructor for |
| 113 | // PreparedStatement overrides this. |
| 114 | protected boolean isPoolable = false; |
| 115 | |
| 116 | // |
| 117 | // constructor |
| 118 | // |
| 119 | public EmbedStatement (EmbedConnection connection, boolean forMetaData, |
| 120 | int resultSetType, int resultSetConcurrency, int resultSetHoldability) |
| 121 | { |
| 122 | super(connection); |
| 123 | this.forMetaData = forMetaData; |
| 124 | this.resultSetType = resultSetType; |
| 125 | this.resultSetConcurrency = resultSetConcurrency; |
| 126 | this.resultSetHoldability = resultSetHoldability; |
| 127 | |
| 128 | lcc = getEmbedConnection().getLanguageConnection(); |
| 129 | applicationConnection = getEmbedConnection().getApplicationConnection(); |
| 130 | applicationStatement = this; |
| 131 | |
| 132 | // By default, no statements time out. |
| 133 | // Timeout is set explicitly with setQueryTimeout(). |
| 134 | timeoutSeconds = 0; |
| 135 | } |
| 136 | |
| 137 | // |
| 138 | // java.sql.Statement interface |
| 139 | // the comments are those from the JDBC interface, |
| 140 | // so we know what we're supposed to to. |
| 141 | |
| 142 | /** |
| 143 | * Execute a SQL statement that returns a single ResultSet. |
| 144 | * |
| 145 | * @param sql typically this is a static SQL SELECT statement |
| 146 | * @return a ResultSet that contains the data produced by the |
| 147 | * query; never null |
| 148 | * @exception SQLException thrown on failure. |
| 149 | */ |
| 150 | public java.sql.ResultSet executeQuery(String sql) |
| 151 | throws SQLException |
| 152 | { |
| 153 | execute(sql, true, false, JDBC30Translation.NO_GENERATED_KEYS, null, null); |
| 154 | |
| 155 | if (SanityManager.DEBUG) { |
| 156 | if (results == null) |
| 157 | SanityManager.THROWASSERT("no results returned on executeQuery()"); |
| 158 | } |
| 159 | |
| 160 | return results; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Execute a SQL INSERT, UPDATE or DELETE statement. In addition, |
| 165 | * SQL statements that return nothing such as SQL DDL statements |
| 166 | * can be executed. |
| 167 | * |
| 168 | * @param sql a SQL INSERT, UPDATE or DELETE statement or a SQL |
| 169 | * statement that returns nothing |
| 170 | * @return either the row count for INSERT, UPDATE or DELETE; or 0 |
| 171 | * for SQL statements that return nothing |
| 172 | * @exception SQLException thrown on failure. |
| 173 | */ |
| 174 | public int executeUpdate(String sql) throws SQLException |
| 175 | { |
| 176 | execute(sql, false, true, JDBC30Translation.NO_GENERATED_KEYS, null, null); |
| 177 | return updateCount; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * JDBC 3.0 |
| 182 | * |
| 183 | * Execute the given SQL statement and signals the driver with the given flag |
| 184 | * about whether the auto-generated keys produced by this Statement object |
| 185 | * should be made available for retrieval. |
| 186 | * |
| 187 | * @param sql a SQL INSERT, UPDATE or DELETE statement or a SQL |
| 188 | * statement that returns nothing |
| 189 | * @param autoGeneratedKeys - a flag indicating whether auto-generated keys |
| 190 | * should be made available for retrieval; one of the following constants: |
| 191 | * Statement.RETURN_GENERATED_KEYS Statement.NO_GENERATED_KEYS |
| 192 | * @return either the row count for INSERT, UPDATE or DELETE; or 0 |
| 193 | * for SQL statements that return nothing |
| 194 | * @exception SQLException if a database access error occurs |
| 195 | */ |
| 196 | public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException |
| 197 | { |
| 198 | execute(sql, false, true, autoGeneratedKeys, null, null); |
| 199 | return updateCount; |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * JDBC 3.0 |
| 204 | * |
| 205 | * Executes the given SQL statement and signals the driver that the |
| 206 | * auto-generated keys indicated in the given array should be made |
| 207 | * available for retrieval. The driver will ignore the array if the SQL |
| 208 | * statement is not an INSERT statement |
| 209 | * |
| 210 | * @param sql a SQL INSERT, UPDATE or DELETE statement or a SQL |
| 211 | * statement that returns nothing |
| 212 | * @param columnIndexes - an array of column indexes indicating the |
| 213 | * columns that should be returned from the inserted row |
| 214 | * @return either the row count for INSERT, UPDATE or DELETE; or 0 |
| 215 | * for SQL statements that return nothing |
| 216 | * @exception SQLException if a database access error occurs |
| 217 | */ |
| 218 | public int executeUpdate(String sql, int[] columnIndexes) throws SQLException |
| 219 | { |
| 220 | throw Util.notImplemented("executeUpdate(String, int[])"); |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * JDBC 3.0 |
| 225 | * |
| 226 | * Executes the given SQL statement and signals the driver that the |
| 227 | * auto-generated keys indicated in the given array should be made |
| 228 | * available for retrieval. The driver will ignore the array if the SQL |
| 229 | * statement is not an INSERT statement |
| 230 | * |
| 231 | * @param sql a SQL INSERT, UPDATE or DELETE statement or a SQL |
| 232 | * statement that returns nothing |
| 233 | * @param columnNames - an array of the names of the columns |
| 234 | * that should be returned from the inserted row |
| 235 | * @return either the row count for INSERT, UPDATE or DELETE; or 0 |
| 236 | * for SQL statements that return nothing |
| 237 | * @exception SQLException if a database access error occurs |
| 238 | */ |
| 239 | public int executeUpdate(String sql, String[] columnNames) throws SQLException |
| 240 | { |
| 241 | throw Util.notImplemented("executeUpdate(String, String[])"); |
| 242 | } |
| 243 | |
| 244 | final void checkIfInMiddleOfBatch() throws SQLException { |
| 245 | /* If batchStatements is not null then we are in the middle |
| 246 | * of a batch. That's an invalid state. We need to finish the |
| 247 | * batch either by clearing the batch or executing the batch. |
| 248 | * executeUpdate is not allowed inside the batch. |
| 249 | */ |
| 250 | if (batchStatements != null) |
| 251 | throw newSQLException(SQLState.MIDDLE_OF_BATCH); |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Tell whether this statment has been closed or not. |
| 256 | * |
| 257 | * @return <code>true</code> is closed, <code>false</code> otherwise. |
| 258 | * @exception SQLException if a database access error occurs. |
| 259 | */ |
| 260 | public boolean isClosed() throws SQLException { |
| 261 | // If active, verify state by consulting parent connection. |
| 262 | if (active) { |
| 263 | try { |
| 264 | checkExecStatus(); |
| 265 | } catch (SQLException sqle) { |
| 266 | } |
| 267 | } |
| 268 | return !active; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * In many cases, it is desirable to immediately release a |
| 273 | * Statements's database and JDBC resources instead of waiting for |
| 274 | * this to happen when it is automatically closed; the close |
| 275 | * method provides this immediate release. |
| 276 | * |
| 277 | * <P><B>Note:</B> A Statement is automatically closed when it is |
| 278 | * garbage collected. When a Statement is closed its current |
| 279 | * ResultSet, if one exists, is also closed. |
| 280 | * @exception SQLException thrown on failure. |
| 281 | */ |
| 282 | public final void close() throws SQLException { |
| 283 | |
| 284 | /* The close() method is the only method |
| 285 | * that is allowed to be called on a closed |
| 286 | * Statement, as per Jon Ellis. |
| 287 | */ |
| 288 | if (!active) |
| 289 | { |
| 290 | return; |
| 291 | } |
| 292 | |
| 293 | synchronized (getConnectionSynchronization()) { |
| 294 | |
| 295 | closeActions(); |
| 296 | |
| 297 | //we first set the status |
| 298 | active = false; |
| 299 | |
| 300 | //first, clear the resutl set |
| 301 | clearResultSets(); |
| 302 | |
| 303 | //next, release other resource |
| 304 | cursorName = null; |
| 305 | warnings = null; |
| 306 | SQLText = null; |
| 307 | batchStatements = null; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | // allow sub-classes to execute additional close |
| 312 | // logic while holding the synchronization. |
| 313 | void closeActions() throws SQLException { |
| 314 | } |
| 315 | |
| 316 | //---------------------------------------------------------------------- |
| 317 | |
| 318 | /** |
| 319 | * The maxFieldSize limit (in bytes) is the maximum amount of data |
| 320 | * returned for any column value; it only applies to BINARY, |
| 321 | * VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR |
| 322 | * columns. If the limit is exceeded, the excess data is silently |
| 323 | * discarded. |
| 324 | * |
| 325 | * @return the current max column size limit; zero means unlimited |
| 326 | * @exception SQLException thrown on failure. |
| 327 | */ |
| 328 | public int getMaxFieldSize() throws SQLException { |
| 329 | checkStatus(); |
| 330 | |
| 331 | return MaxFieldSize; |
| 332 | } |
| 333 | |
| 334 | /** |
| 335 | * The maxFieldSize limit (in bytes) is set to limit the size of |
| 336 | * data that can be returned for any column value; it only applies |
| 337 | * to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and |
| 338 | * LONGVARCHAR fields. If the limit is exceeded, the excess data |
| 339 | * is silently discarded. |
| 340 | * |
| 341 | * @param max the new max column size limit; zero means unlimited |
| 342 | * @exception SQLException thrown on failure. |
| 343 | */ |
| 344 | public void setMaxFieldSize(int max) throws SQLException { |
| 345 | checkStatus(); |
| 346 | |
| 347 | if (max < 0) |
| 348 | { |
| 349 | throw newSQLException(SQLState.INVALID_MAXFIELD_SIZE, new Integer(max)); |
| 350 | } |
| 351 | this.MaxFieldSize = max; |
| 352 | } |
| 353 | |
| 354 | /** |
| 355 | * The maxRows limit is the maximum number of rows that a |
| 356 | * ResultSet can contain. If the limit is exceeded, the excess |
| 357 | * rows are silently dropped. |
| 358 | * |
| 359 | * @return the current max row limit; zero means unlimited |
| 360 | * @exception SQLException thrown on failure. |
| 361 | */ |
| 362 | public int getMaxRows() throws SQLException |
| 363 | { |
| 364 | checkStatus(); |
| 365 | return maxRows; |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * The maxRows limit is set to limit the number of rows that any |
| 370 | * ResultSet can contain. If the limit is exceeded, the excess |
| 371 | * rows are silently dropped. |
| 372 | * |
| 373 | * @param max the new max rows limit; zero means unlimited |
| 374 | * @exception SQLException thrown on failure. |
| 375 | */ |
| 376 | public void setMaxRows(int max) throws SQLException |
| 377 | { |
| 378 | checkStatus(); |
| 379 | if (max < 0) |
| 380 | { |
| 381 | throw newSQLException(SQLState.INVALID_MAX_ROWS_VALUE, new Integer(max)); |
| 382 | } |
| 383 | this.maxRows = max; |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * If escape scanning is on (the default) the driver will do |
| 388 | * escape substitution before sending the SQL to the database. |
| 389 | * |
| 390 | * @param enable true to enable; false to disable |
| 391 | * @exception SQLException thrown on failure. |
| 392 | */ |
| 393 | public void setEscapeProcessing(boolean enable) throws SQLException { |
| 394 | checkStatus(); |
| 395 | // Nothing to do in our server , just ignore it. |
| 396 | |
| 397 | } |
| 398 | |
| 399 | /** |
| 400 | * The queryTimeout limit is the number of seconds the driver will |
| 401 | * wait for a Statement to execute. If the limit is exceeded a |
| 402 | * SQLException is thrown. |
| 403 | * |
| 404 | * @return the current query timeout limit in seconds; zero means unlimited |
| 405 | * @exception SQLException thrown on failure. |
| 406 | */ |
| 407 | public final int getQueryTimeout() throws SQLException { |
| 408 | checkStatus(); |
| 409 | return timeoutSeconds; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * The queryTimeout limit is the number of seconds the driver will |
| 414 | * wait for a Statement to execute. If the limit is exceeded a |
| 415 | * SQLException is thrown. |
| 416 | * |
| 417 | * @param seconds the new query timeout limit in seconds; zero means unlimited |
| 418 | * @exception SQLException thrown on failure. |
| 419 | */ |
| 420 | public final void setQueryTimeout(int seconds) throws SQLException { |
| 421 | checkStatus(); |
| 422 | if (seconds < 0) { |
| 423 | throw newSQLException(SQLState.INVALID_QUERYTIMEOUT_VALUE, |
| 424 | new Integer(seconds)); |
| 425 | } |
| 426 | timeoutSeconds = seconds; |
| 427 | } |
| 428 | |
| 429 | /** |
| 430 | * Cancel can be used by one thread to cancel a statement that |
| 431 | * is being executed by another thread. |
| 432 | * @exception SQLException thrown on failure. |
| 433 | */ |
| 434 | public void cancel() throws SQLException { |
| 435 | throw Util.notImplemented("cancel"); |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * The first warning reported by calls on this Statement is |
| 440 | * returned. A Statment's execute methods clear its SQLWarning |
| 441 | * chain. Subsequent Statement warnings will be chained to this |
| 442 | * SQLWarning. |
| 443 | * |
| 444 | * <p>The warning chain is automatically cleared each time |
| 445 | * a statement is (re)executed. |
| 446 | * |
| 447 | * <P><B>Note:</B> If you are processing a ResultSet then any |
| 448 | * warnings associated with ResultSet reads will be chained on the |
| 449 | * ResultSet object. |
| 450 | * |
| 451 | * @return the first SQLWarning or null |
| 452 | * @exception SQLException thrown on failure. |
| 453 | */ |
| 454 | public SQLWarning getWarnings() throws SQLException { |
| 455 | checkStatus(); |
| 456 | return warnings; |
| 457 | } |
| 458 | |
| 459 | /** |
| 460 | * After this call getWarnings returns null until a new warning is |
| 461 | * reported for this Statement. |
| 462 | * @exception SQLException thrown on failure. |
| 463 | */ |
| 464 | public void clearWarnings() throws SQLException { |
| 465 | checkStatus(); |
| 466 | warnings = null; |
| 467 | } |
| 468 | |
| 469 | /** |
| 470 | * setCursorName defines the SQL cursor name that will be used by |
| 471 | * subsequent Statement execute methods. This name can then be |
| 472 | * used in SQL positioned update/delete statements to identify the |
| 473 | * current row in the ResultSet generated by this statement. If |
| 474 | * the database doesn't support positioned update/delete, this |
| 475 | * method is a noop. |
| 476 | * |
| 477 | * <P><B>Note:</B> By definition, positioned update/delete |
| 478 | * execution must be done by a different Statement than the one |
| 479 | * which generated the ResultSet being used for positioning. Also, |
| 480 | * cursor names must be unique within a Connection. |
| 481 | * |
| 482 | * @param name the new cursor name. |
| 483 | */ |
| 484 | public void setCursorName(String name) throws SQLException { |
| 485 | checkStatus(); |
| 486 | cursorName = name; |
| 487 | } |
| 488 | |
| 489 | //----------------------- Multiple Results -------------------------- |
| 490 | |
| 491 | /** |
| 492 | * Execute a SQL statement that may return multiple results. |
| 493 | * Under some (uncommon) situations a single SQL statement may return |
| 494 | * multiple result sets and/or update counts. Normally you can ignore |
| 495 | * this, unless you're executing a stored procedure that you know may |
| 496 | * return multiple results, or unless you're dynamically executing an |
| 497 | * unknown SQL string. The "execute", "getMoreResults", "getResultSet" |
| 498 | * and "getUpdateCount" methods let you navigate through multiple results. |
| 499 | * |
| 500 | * The "execute" method executes a SQL statement and indicates the |
| 501 | * form of the first result. You can then use getResultSet or |
| 502 | * getUpdateCount to retrieve the result, and getMoreResults to |
| 503 | * move to any subsequent result(s). |
| 504 | * |
| 505 | * @param sql any SQL statement |
| 506 | * |
| 507 | * @return true if the first result is a ResultSet; false if it is an integer |
| 508 | * @see #getResultSet |
| 509 | * @see #getUpdateCount |
| 510 | * @see #getMoreResults |
| 511 | * @exception SQLException thrown on failure |
| 512 | */ |
| 513 | public boolean execute(String sql) |
| 514 | throws SQLException |
| 515 | { |
| 516 | return execute(sql, false, false, JDBC30Translation.NO_GENERATED_KEYS, null, null); |
| 517 | } |
| 518 | |
| 519 | /** |
| 520 | * Execute a SQL statement that may return multiple results. |
| 521 | * Under some (uncommon) situations a single SQL statement may return |
| 522 | * multiple result sets and/or update counts. Normally you can ignore |
| 523 | * this, unless you're executing a stored procedure that you know may |
| 524 | * return multiple results, or unless you're dynamically executing an |
| 525 | * unknown SQL string. The "execute", "getMoreResults", "getResultSet" |
| 526 | * and "getUpdateCount" methods let you navigate through multiple results. |
| 527 | * |
| 528 | * The "execute" method executes a SQL statement and indicates the |
| 529 | * form of the first result. You can then use getResultSet or |
| 530 | * getUpdateCount to retrieve the result, and getMoreResults to |
| 531 | * move to any subsequent result(s). |
| 532 | * |
| 533 | * @param sql any SQL statement |
| 534 | * @param executeQuery caller is executeQuery() |
| 535 | * @param executeUpdate caller is executeUpdate() |
| 536 | * @param autoGeneratedKeys |
| 537 | * @param columnIndexes |
| 538 | * @param columnNames |
| 539 | * |
| 540 | * @return true if the first result is a ResultSet; false if it is an integer |
| 541 | * @see #getResultSet |
| 542 | * @see #getUpdateCount |
| 543 | * @see #getMoreResults |
| 544 | * @exception SQLException thrown on failure |
| 545 | */ |
| 546 | private boolean execute(String sql, boolean executeQuery, boolean executeUpdate, |
| 547 | int autoGeneratedKeys, int[] columnIndexes, String[] columnNames) throws SQLException |
| 548 | { |
| 549 | synchronized (getConnectionSynchronization()) { |
| 550 | |
| 551 | checkExecStatus(); |
| 552 | if (sql == null) { |
| 553 | throw newSQLException(SQLState.NULL_SQL_TEXT); |
| 554 | } |
| 555 | checkIfInMiddleOfBatch(); |
| 556 | clearResultSets(); // release the last statement executed, if any. |
| 557 | |
| 558 | setupContextStack(); // make sure there's context |
| 559 | |
| 560 | |
| 561 | // try to remember the SQL statement in case anybody asks for it |
| 562 | SQLText = sql; |
| 563 | |
| 564 | try { |
| 565 | Activation activation; |
| 566 | try { |
| 567 | PreparedStatement preparedStatement = lcc.prepareInternalStatement |
| 568 | (lcc.getDefaultSchema(), sql, resultSetConcurrency==JDBC20Translation.CONCUR_READ_ONLY, false); |
| 569 | activation = |
| 570 | preparedStatement.getActivation(lcc, resultSetType == JDBC20Translation.TYPE_SCROLL_INSENSITIVE); |
| 571 | checkRequiresCallableStatement(activation); |
| 572 | } catch (Throwable t) { |
| 573 | throw handleException(t); |
| 574 | } |
| 575 | |
| 576 | |
| 577 | // this is for a Statement execution |
| 578 | activation.setSingleExecution(); |
| 579 | |
| 580 | //bug 4838 - save the auto-generated key information in activation. keeping this |
| 581 | //information in lcc will not work work it can be tampered by a nested trasaction |
| 582 | if (autoGeneratedKeys == JDBC30Translation.RETURN_GENERATED_KEYS) |
| 583 | activation.setAutoGeneratedKeysResultsetInfo(columnIndexes, columnNames); |
| 584 | return executeStatement(activation, executeQuery, executeUpdate); |
| 585 | } finally { |
| 586 | restoreContextStack(); |
| 587 | } |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | /** |
| 592 | * JDBC 3.0 |
| 593 | * |
| 594 | * Executes the given SQL statement, which may return multiple |
| 595 | * results, and signals the driver that any auto-generated keys |
| 596 | * should be made available for retrieval. The driver will ignore |
| 597 | * this signal if the SQL statement is not an INSERT statement. |
| 598 | * |
| 599 | * @param sql any SQL statement |
| 600 | * @param autoGeneratedKeys - a constant indicating whether |
| 601 | * auto-generated keys should be made available for retrieval using |
| 602 | * the method getGeneratedKeys; one of the following constants: |
| 603 | * Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS |
| 604 | * @return rue if the first result is a ResultSet object; false if |
| 605 | * it is an update count or there are no results |
| 606 | * @exception SQLException if a database access error occurs |
| 607 | */ |
| 608 | public boolean execute(String sql, int autoGeneratedKeys) throws SQLException |
| 609 | { |
| 610 | return execute(sql, false, false, autoGeneratedKeys, null, null); |
| 611 | } |
| 612 | |
| 613 | /** |
| 614 | * JDBC 3.0 |
| 615 | * |
| 616 | * Executes the given SQL statement, which may return multiple |
| 617 | * results, and signals the driver that the auto-generated keys |
| 618 | * indicated in the given array should be made available for retrieval. |
| 619 | * This array contains the indexes of the columns in the target table |
| 620 | * that contain the auto-generated keys that should be made available. |
| 621 | * The driver will ignore the array if the given SQL statement is not an |
| 622 | * INSERT statement. |
| 623 | * |
| 624 | * @param sql any SQL statement |
| 625 | * @param columnIndexes - an array of the indexes of the columns in the |
| 626 | * inserted row that should be made available for retrieval by a call to |
| 627 | * the method getGeneratedKeys |
| 628 | * @return rue if the first result is a ResultSet object; false if |
| 629 | * it is an update count or there are no results |
| 630 | * @exception SQLException if a database access error occurs |
| 631 | */ |
| 632 | public boolean execute(String sql, int[] columnIndexes) throws SQLException |
| 633 | { |
| 634 | throw Util.notImplemented("execute(String, int[])"); |
| 635 | } |
| 636 | |
| 637 | /** |
| 638 | * JDBC 3.0 |
| 639 | * |
| 640 | * Executes the given SQL statement, which may return multiple |
| 641 | * results, and signals the driver that the auto-generated keys |
| 642 | * indicated in the given array should be made available for retrieval. |
| 643 | * This array contains the names of the columns in the target table |
| 644 | * that contain the auto-generated keys that should be made available. |
| 645 | * The driver will ignore the array if the given SQL statement is not an |
| 646 | * INSERT statement. |
| 647 | * |
| 648 | * @param sql any SQL statement |
| 649 | * @param columnNames - an array of the names of the columns in the |
| 650 | * inserted row that should be made available for retrieval by a call to |
| 651 | * the method getGeneratedKeys |
| 652 | * @return rue if the first result is a ResultSet object; false if |
| 653 | * it is an update count or there are no results |
| 654 | * @exception SQLException if a database access error occurs |
| 655 | */ |
| 656 | public boolean execute(String sql, String[] columnNames) throws SQLException |
| 657 | { |
| 658 | throw Util.notImplemented("execute(String, String[])"); |
| 659 | } |
| 660 | |
| 661 | /** |
| 662 | * getResultSet returns the current result as a ResultSet. It |
| 663 | * should only be called once per result. |
| 664 | * |
| 665 | * @return the current result as a ResultSet; null if the result |
| 666 | * is an update count or there are no more results or the statement |
| 667 | * was closed. |
| 668 | * @see #execute |
| 669 | */ |
| 670 | public final java.sql.ResultSet getResultSet() throws SQLException { |
| 671 | checkStatus(); |
| 672 | |
| 673 | return results; |
| 674 | } |
| 675 | |
| 676 | /** |
| 677 | * getUpdateCount returns the current result as an update count; |
| 678 | * if the result is a ResultSet or there are no more results -1 |
| 679 | * is returned. It should only be called once per result. |
| 680 | * |
| 681 | * <P>The only way to tell for sure that the result is an update |
| 682 | * count is to first test to see if it is a ResultSet. If it is |
| 683 | * not a ResultSet it is either an update count or there are no |
| 684 | * more results. |
| 685 | * |
| 686 | * @return the current result as an update count; -1 if it is a |
| 687 | * ResultSet or there are no more results |
| 688 | * @see #execute |
| 689 | */ |
| 690 | public final int getUpdateCount() throws SQLException { |
| 691 | checkStatus(); |
| 692 | return updateCount; |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * getMoreResults moves to a Statement's next result. It returns true if |
| 697 | * this result is a ResultSet. getMoreResults also implicitly |
| 698 | * closes any current ResultSet obtained with getResultSet. |
| 699 | * |
| 700 | * There are no more results when (!getMoreResults() && |
| 701 | * (getUpdateCount() == -1) |
| 702 | * |
| 703 | * @return true if the next result is a ResultSet; false if it is |
| 704 | * an update count or there are no more results |
| 705 | * @see #execute |
| 706 | * @exception SQLException thrown on failure. |
| 707 | */ |
| 708 | public final boolean getMoreResults() throws SQLException { |
| 709 | return getMoreResults(JDBC30Translation.CLOSE_ALL_RESULTS); |
| 710 | } |
| 711 | |
| 712 | ///////////////////////////////////////////////////////////////////////// |
| 713 | // |
| 714 | // JDBC 2.0 methods that are implemented here because EmbedPreparedStatement |
| 715 | // and EmbedCallableStatement in Local20 need access to them, and those |
| 716 | // classes extend their peer classes in Local, instead of EmbedStatement |
| 717 | // in Local20 |
| 718 | // |
| 719 | // We do the same of JDBC 3.0 methods. |
| 720 | ///////////////////////////////////////////////////////////////////////// |
| 721 | |
| 722 | /** |
| 723 | * JDBC 2.0 |
| 724 | * |
| 725 | * Determine the result set type. |
| 726 | * |
| 727 | * @exception SQLException Feature not implemented for now. |
| 728 | */ |
| 729 | public final int getResultSetType() |
| 730 | throws SQLException |
| 731 | { |
| 732 | checkStatus(); |
| 733 | return resultSetType; |
| 734 | } |
| 735 | |
| 736 | |
| 737 | /** |
| 738 | * JDBC 2.0 |
| 739 | * |
| 740 | * Give a hint as to the direction in which the rows in a result set |
| 741 | * will be processed. The hint applies only to result sets created |
| 742 | * using this Statement object. The default value is |
| 743 | * ResultSet.FETCH_FORWARD. |
| 744 | * |
| 745 | * @param direction the initial direction for processing rows |
| 746 | * @exception SQLException if a database-access error occurs or direction |
| 747 | * is not one of ResultSet.FETCH_FORWARD, ResultSet.FETCH_REVERSE, or |
| 748 | * ResultSet.FETCH_UNKNOWN |
| 749 | */ |
| 750 | public void setFetchDirection(int direction) throws SQLException { |
| 751 | |
| 752 | checkStatus(); |
| 753 | /* fetch direction is meaningless to us. we just save |
| 754 | * it off if it is valid and return the current value if asked. |
| 755 | */ |
| 756 | if (direction == JDBC20Translation.FETCH_FORWARD || |
| 757 | direction == JDBC20Translation.FETCH_REVERSE || |
| 758 | direction == JDBC20Translation.FETCH_UNKNOWN ) |
| 759 | { |
| 760 | fetchDirection = direction; |
| 761 | }else |
| 762 | throw newSQLException(SQLState.INVALID_FETCH_DIRECTION, |
| 763 | new Integer(direction)); |
| 764 | } |
| 765 | |
| 766 | /** |
| 767 | * JDBC 2.0 |
| 768 | * |
| 769 | * Determine the fetch direction. |
| 770 | * |
| 771 | * @return the default fetch direction |
| 772 | * @exception SQLException if a database-access error occurs |
| 773 | */ |
| 774 | public int getFetchDirection() throws SQLException { |
| 775 | checkStatus(); |
| 776 | return fetchDirection; |
| 777 | } |
| 778 | |
| 779 | |
| 780 | /** |
| 781 | * JDBC 2.0 |
| 782 | * |
| 783 | * Give the JDBC driver a hint as to the number of rows that should |
| 784 | * be fetched from the database when more rows are needed. The number |
| 785 | * of rows specified only affects result sets created using this |
| 786 | * statement. If the value specified is zero, then the hint is ignored. |
| 787 | * The default value is zero. |
| 788 | * |
| 789 | * @param rows the number of rows to fetch |
| 790 | * @exception SQLException if a database-access error occurs, or the |
| 791 | * condition 0 <= rows <= this.getMaxRows() is not satisfied. |
| 792 | */ |
| 793 | public void setFetchSize(int rows) throws SQLException { |
| 794 | checkStatus(); |
| 795 | if (rows < 0 || (this.getMaxRows() != 0 && |
| 796 | rows > this.getMaxRows())) |
| 797 | { |
| 798 | throw newSQLException(SQLState.INVALID_ST_FETCH_SIZE, new Integer(rows)); |
| 799 | }else if ( rows > 0 ) // ignore the call if the value is zero |
| 800 | fetchSize = rows; |
| 801 | } |
| 802 | |
| 803 | /** |
| 804 | * JDBC 2.0 |
| 805 | * |
| 806 | * Determine the default fetch size. |
| 807 | * @exception SQLException if a database-access error occurs |
| 808 | * |
| 809 | */ |
| 810 | public int getFetchSize() throws SQLException { |
| 811 | checkStatus(); |
| 812 | return fetchSize; |
| 813 | } |
| 814 | |
| 815 | /** |
| 816 | * JDBC 2.0 |
| 817 | * |
| 818 | * Determine the result set concurrency. |
| 819 | * |
| 820 | * @exception SQLException Feature not implemented for now. |
| 821 | */ |
| 822 | public int getResultSetConcurrency() throws SQLException { |
| 823 | checkStatus(); |
| 824 | return resultSetConcurrency; |
| 825 | } |
| 826 | |
| 827 | /** |
| 828 | * JDBC 3.0 |
| 829 | * |
| 830 | * Retrieves the result set holdability for ResultSet objects |
| 831 | * generated by this Statement object. |
| 832 | * |
| 833 | * @return either ResultSet.HOLD_CURSORS_OVER_COMMIT or |
| 834 | * ResultSet.CLOSE_CURSORS_AT_COMMIT |
| 835 | * @exception SQLException Feature not implemented for now. |
| 836 | */ |
| 837 | public final int getResultSetHoldability() throws SQLException { |
| 838 | checkStatus(); |
| 839 | return resultSetHoldability; |
| 840 | } |
| 841 | |
| 842 | /** |
| 843 | * JDBC 2.0 |
| 844 | * |
| 845 | * Adds a SQL command to the current batch of commmands for the statement. |
| 846 | * This method is optional. |
| 847 | * |
| 848 | * @param sql typically this is a static SQL INSERT or UPDATE statement |
| 849 | * @exception SQLException if a database-access error occurs, or the |
| 850 | * driver does not support batch statements |
| 851 | */ |
| 852 | public void addBatch( String sql ) throws SQLException { |
| 853 | checkStatus(); |
| 854 | synchronized (getConnectionSynchronization()) { |
| 855 | if (batchStatements == null) |
| 856 | batchStatements = new Vector(); |
| 857 | batchStatements.addElement(sql); |
| 858 | } |
| 859 | } |
| 860 | |
| 861 | /** |
| 862 | * JDBC 2.0 |
| 863 | * |
| 864 | * Make the set of commands in the current batch empty. |
| 865 | * This method is optional. |
| 866 | * |
| 867 | * @exception SQLException if a database-access error occurs, or the |
| 868 | * driver does not support batch statements |
| 869 | */ |
| 870 | public final void clearBatch() throws SQLException { |
| 871 | checkStatus(); |
| 872 | synchronized (getConnectionSynchronization()) { |
| 873 | batchStatements = null; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | /** |
| 878 | * JDBC 2.0 |
| 879 | * |
| 880 | * Submit a batch of commands to the database for execution. |
| 881 | * This method is optional. |
| 882 | * |
| 883 | * Moving jdbc2.0 batch related code in this class because |
| 884 | * callableStatement in jdbc 20 needs this code too and it doesn't derive |
| 885 | * from prepared statement in jdbc 20 in our implementation. |
| 886 | * BatchUpdateException is the only new class from jdbc 20 which is being |
| 887 | * referenced here and in order to avoid any jdk11x problems, using |
| 888 | * reflection code to make an instance of that class. |
| 889 | * |
| 890 | * @return an array of update counts containing one element for each |
| 891 | * command in the batch. The array is ordered according |
| 892 | * to the order in which commands were inserted into the batch |
| 893 | * @exception SQLException if a database-access error occurs, or the |
| 894 | * driver does not support batch statements |
| 895 | */ |
| 896 | public int[] executeBatch() throws SQLException { |
| 897 | checkExecStatus(); |
| 898 | synchronized (getConnectionSynchronization()) |
| 899 | { |
| 900 | setupContextStack(); |
| 901 | int i = 0; |
| 902 | // As per the jdbc 2.0 specs, close the statement object's current resultset |
| 903 | // if one is open. |
| 904 | // Are there results? |
| 905 | // outside of the lower try/finally since results will |
| 906 | // setup and restore themselves. |
| 907 | clearResultSets(); |
| 908 | |
| 909 | Vector stmts = batchStatements; |
| 910 | batchStatements = null; |
| 911 | int size; |
| 912 | if (stmts == null) |
| 913 | size = 0; |
| 914 | else |
| 915 | size = stmts.size(); |
| 916 | |
| 917 | int[] returnUpdateCountForBatch = new int[size]; |
| 918 | |
| 919 | SQLException sqle; |
| 920 | try { |
| 921 | for (; i< size; i++) |
| 922 | { |
| 923 | if (executeBatchElement(stmts.elementAt(i))) |
| 924 | throw newSQLException(SQLState.RESULTSET_RETURN_NOT_ALLOWED); |
| 925 | returnUpdateCountForBatch[i] = getUpdateCount(); |
| 926 | } |
| 927 | return returnUpdateCountForBatch; |
| 928 | } |
| 929 | catch (StandardException se) { |
| 930 | |
| 931 | sqle = handleException(se); |
| 932 | } |
| 933 | catch (SQLException sqle2) |
| 934 | { |
| 935 | sqle = sqle2; |
| 936 | } |
| 937 | finally |
| 938 | { |
| 939 | restoreContextStack(); |
| 940 | } |
| 941 | |
| 942 | int successfulUpdateCount[] = new int[i]; |
| 943 | for (int j=0; j<i; j++) |
| 944 | { |
| 945 | successfulUpdateCount[j] = returnUpdateCountForBatch[j]; |
| 946 | } |
| 947 | |
| 948 | SQLException batch = |
| 949 | new java.sql.BatchUpdateException(sqle.getMessage(), sqle.getSQLState(), |
| 950 | sqle.getErrorCode(), successfulUpdateCount); |
| 951 | |
| 952 | batch.setNextException(sqle); |
| 953 | throw batch; |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | /** |
| 958 | Execute a single element of the batch. Overridden by EmbedPreparedStatement |
| 959 | */ |
| 960 | boolean executeBatchElement(Object batchElement) throws SQLException, StandardException { |
| 961 | return execute((String)batchElement, false, true, JDBC30Translation.NO_GENERATED_KEYS, null, null); |
| 962 | } |
| 963 | |
| 964 | /** |
| 965 | * JDBC 2.0 |
| 966 | * |
| 967 | * Return the Connection that produced the Statement. |
| 968 | * |
| 969 | * @exception SQLException Exception if it cannot find the connection |
| 970 | * associated to this statement. |
| 971 | */ |
| 972 | public final java.sql.Connection getConnection() throws SQLException { |
| 973 | checkStatus(); |
| 974 | |
| 975 | java.sql.Connection appConn = getEmbedConnection().getApplicationConnection(); |
| 976 | if ((appConn != applicationConnection) || (appConn == null)) { |
| 977 | |
| 978 | throw Util.noCurrentConnection(); |
| 979 | } |
| 980 | return appConn; |
| 981 | } |
| 982 | |
| 983 | /** |
| 984 | * JDBC 3.0 |
| 985 | * |
| 986 | * Moves to this Statement obect's next result, deals with any current ResultSet |
| 987 | * object(s) according to the instructions specified by the given flag, and |
| 988 | * returns true if the next result is a ResultSet object |
| 989 | * |
| 990 | * @param current - one of the following Statement constants indicating what |
| 991 | * should happen to current ResultSet objects obtained using the method |
| 992 | * getResultSetCLOSE_CURRENT_RESULT, KEEP_CURRENT_RESULT, or CLOSE_ALL_RESULTS |
| 993 | * @return true if the next result is a ResultSet; false if it is |
| 994 | * an update count or there are no more results |
| 995 | * @see #execute |
| 996 | * @exception SQLException thrown on failure. |
| 997 | */ |
| 998 | public final boolean getMoreResults(int current) throws SQLException { |
| 999 | checkExecStatus(); |
| 1000 | |
| 1001 | synchronized (getConnectionSynchronization()) { |
| 1002 | if (dynamicResults == null) { |
| 1003 | // we only have the one resultset, so this is |
| 1004 | // simply a close for us. |
| 1005 | clearResultSets(); |
| 1006 | return false; |
| 1007 | } |
| 1008 | |
| 1009 | int startingClose; |
| 1010 | switch (current) { |
| 1011 | default: |
| 1012 | case JDBC30Translation.CLOSE_ALL_RESULTS: |
| 1013 | startingClose = 0; |
| 1014 | break; |
| 1015 | case JDBC30Translation.CLOSE_CURRENT_RESULT: |
| 1016 | // just close the current result set. |
| 1017 | startingClose = currentDynamicResultSet; |
| 1018 | break; |
| 1019 | case JDBC30Translation.KEEP_CURRENT_RESULT: |
| 1020 | // make the close loop a no-op. |
| 1021 | startingClose = dynamicResults.length; |
| 1022 | break; |
| 1023 | } |
| 1024 | |
| 1025 | // Close loop. |
| 1026 | SQLException se = null; |
| 1027 | for (int i = startingClose; i <= currentDynamicResultSet && i < dynamicResults.length; i++) { |
| 1028 | EmbedResultSet lrs = dynamicResults[i]; |
| 1029 | if (lrs == null) |
| 1030 | continue; |
| 1031 | |
| 1032 | |
| 1033 | try { |
| 1034 | lrs.close(); |
| 1035 | } catch (SQLException sqle) { |
| 1036 | if (se == null) |
| 1037 | se = sqle; |
| 1038 | else |
| 1039 | se.setNextException(sqle); |
| 1040 | } finally { |
| 1041 | dynamicResults[i] = null; |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | if (se != null) { |
| 1046 | // leave positioned on the current result set (?) |
| 1047 | throw se; |
| 1048 | } |
| 1049 | |
| 1050 | updateCount = -1; |
| 1051 | |
| 1052 | while (++currentDynamicResultSet < dynamicResults.length) { |
| 1053 | |
| 1054 | EmbedResultSet lrs = dynamicResults[currentDynamicResultSet]; |
| 1055 | if (lrs != null) { |
| 1056 | if (lrs.isClosed) { |
| 1057 | dynamicResults[currentDynamicResultSet] = null; |
| 1058 | continue; |
| 1059 | } |
| 1060 | |
| 1061 | results = lrs; |
| 1062 | |
| 1063 | return true; |
| 1064 | } |
| 1065 | } |
| 1066 | |
| 1067 | results = null; |
| 1068 | return false; |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | /** |
| 1073 | * JDBC 3.0 |
| 1074 | * |
| 1075 | * Retrieves any auto-generated keys created as a result of executing this |
| 1076 | * Statement object. If this Statement is a non-insert statement, |
| 1077 | * a null ResultSet object is returned. |
| 1078 | * |
| 1079 | * @return a ResultSet object containing the auto-generated key(s) generated by |
| 1080 | * the execution of this Statement object |
| 1081 | * @exception SQLException if a database access error occurs |
| 1082 | */ |
| 1083 | public final java.sql.ResultSet getGeneratedKeys() throws SQLException { |
| 1084 | checkStatus(); |
| 1085 | if (autoGeneratedKeysResultSet == null) |
| 1086 | return null; |
| 1087 | else { |
| 1088 | execute("VALUES IDENTITY_VAL_LOCAL()", true, false, JDBC30Translation.NO_GENERATED_KEYS, null, null); |
| 1089 | return results; |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | ///////////////////////////////////////////////////////////////////////// |
| 1094 | // |
| 1095 | // Implementation specific methods |
| 1096 | // |
| 1097 | ///////////////////////////////////////////////////////////////////////// |
| 1098 | |
| 1099 | /** |
| 1100 | Execute the current statement. |
| 1101 | @exception SQLException thrown on failure. |
| 1102 | */ |
| 1103 | boolean executeStatement(Activation a, |
| 1104 | boolean executeQuery, boolean executeUpdate) |
| 1105 | throws SQLException { |
| 1106 | |
| 1107 | // we don't differentiate the update from the resultset case. |
| 1108 | // so, there could be a result set. |
| 1109 | |
| 1110 | // note: the statement interface will paste together |
| 1111 | // an activation and make sure the prepared statement |
| 1112 | // is still valid, so it is preferrable, for now, |
| 1113 | // to creating our own activation and stuffing it in |
| 1114 | // the prepared statement. |
| 1115 | |
| 1116 | synchronized (getConnectionSynchronization()) { |
| 1117 | setupContextStack(); // make sure there's context |
| 1118 | boolean retval; |
| 1119 | |
| 1120 | pvs = a.getParameterValueSet(); |
| 1121 | |
| 1122 | try { |
| 1123 | // The following is from the javadoc for java.sql.Statement |
| 1124 | // Only one ResultSet per Statement can be open at any point in time. |
| 1125 | // Therefore, if the reading of one ResultSet is interleaved with the |
| 1126 | // reading of another, each must have been generated by different Statements. |
| 1127 | // All statement execute methods implicitly close a |
| 1128 | // statment's current ResultSet if an open one exists. |
| 1129 | if (results != null) { |
| 1130 | results.close(); |
| 1131 | results = null; |
| 1132 | } |
| 1133 | |
| 1134 | clearWarnings(); |
| 1135 | |
| 1136 | if (! forMetaData) { |
| 1137 | commitIfNeeded(); // commit the last statement if needed |
| 1138 | needCommit(); |
| 1139 | } else { |
| 1140 | |
| 1141 | |
| 1142 | if (lcc.getActivationCount() > 1) { |
| 1143 | // we do not want to commit here as there seems to be other |
| 1144 | // statements/resultSets currently opened for this connection. |
| 1145 | } else { |
| 1146 | commitIfNeeded(); // we can legitimately commit |
| 1147 | needCommit(); |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | // if this was a prepared statement, this just |
| 1152 | // gets it for us, it won't recompile unless it is invalid. |
| 1153 | PreparedStatement ps = a.getPreparedStatement(); |
| 1154 | ps.rePrepare(lcc); |
| 1155 | addWarning(ps.getCompileTimeWarnings()); |
| 1156 | |
| 1157 | |
| 1158 | /* |
| 1159 | ** WARNING WARNING |
| 1160 | ** |
| 1161 | ** Any state set in the activation before execution *must* be copied |
| 1162 | ** to the new activation in GenericActivationHolder.execute() when |
| 1163 | ** the statement has been recompiled. State such as |
| 1164 | ** singleExecution, cursorName, holdability, maxRows. |
| 1165 | */ |
| 1166 | |
| 1167 | if (cursorName != null) |
| 1168 | { |
| 1169 | a.setCursorName(cursorName); |
| 1170 | } |
| 1171 | |
| 1172 | boolean executeHoldable = getExecuteHoldable(); |
| 1173 | |
| 1174 | a.setResultSetHoldability(executeHoldable); |
| 1175 | |
| 1176 | //reset the activation to clear warnings |
| 1177 | //and clear existing result sets in case this has been cached |
| 1178 | a.reset(); |
| 1179 | a.setMaxRows(maxRows); |
| 1180 | long timeoutMillis = (long)timeoutSeconds * 1000L; |
| 1181 | ResultSet resultsToWrap = ps.execute(a, |
| 1182 | false, |
| 1183 | timeoutMillis); |
| 1184 | addWarning(a.getWarnings()); |
| 1185 | |
| 1186 | |
| 1187 | if (resultsToWrap.returnsRows()) { |
| 1188 | |
| 1189 | // The statement returns rows, so calling it with |
| 1190 | // executeUpdate() is not allowed. |
| 1191 | if (executeUpdate) { |
| 1192 | throw StandardException.newException( |
| 1193 | SQLState.LANG_INVALID_CALL_TO_EXECUTE_UPDATE); |
| 1194 | } |
| 1195 | |
| 1196 | EmbedResultSet lresults = factory.newEmbedResultSet(getEmbedConnection(), resultsToWrap, forMetaData, this, ps.isAtomic()); |
| 1197 | results = lresults; |
| 1198 | |
| 1199 | |
| 1200 | // Set up the finalization of the ResultSet to |
| 1201 | // mark the activation as unused. It will be |
| 1202 | // closed sometime later by the connection |
| 1203 | // outside of finalization. |
| 1204 | if (a.isSingleExecution()) |
| 1205 | lresults.finalizeActivation = a; |
| 1206 | |
| 1207 | updateCount = -1; |
| 1208 | retval = true; |
| 1209 | } |
| 1210 | else { |
| 1211 | |
| 1212 | // Only applipable for an insert statement, which does not return rows. |
| 1213 | //the auto-generated keys resultset will be null if used for non-insert statement |
| 1214 | if (a.getAutoGeneratedKeysResultsetMode() && (resultsToWrap.getAutoGeneratedKeysResultset() != null)) |
| 1215 | { |
| 1216 | resultsToWrap.getAutoGeneratedKeysResultset().open(); |
| 1217 | autoGeneratedKeysResultSet = factory.newEmbedResultSet(getEmbedConnection(), |
| 1218 | resultsToWrap.getAutoGeneratedKeysResultset(), false, this, ps.isAtomic()); |
| 1219 | } |
| 1220 | |
| 1221 | updateCount = resultsToWrap.modifiedRowCount(); |
| 1222 | |
| 1223 | resultsToWrap.finish(); // Don't need the result set any more |
| 1224 | results = null; // note that we have none. |
| 1225 | |
| 1226 | int dynamicResultCount = 0; |
| 1227 | if (a.getDynamicResults() != null) { |
| 1228 | dynamicResultCount = |
| 1229 | processDynamicResults(a.getDynamicResults(), |
| 1230 | a.getMaxDynamicResults()); |
| 1231 | } |
| 1232 | |
| 1233 | // executeQuery() is not allowed if the statement |
| 1234 | // doesn't return exactly one ResultSet. |
| 1235 | if (executeQuery && dynamicResultCount != 1) { |
| 1236 | throw StandardException.newException( |
| 1237 | SQLState.LANG_INVALID_CALL_TO_EXECUTE_QUERY); |
| 1238 | } |
| 1239 | |
| 1240 | // executeUpdate() is not allowed if the statement |
| 1241 | // returns ResultSets. |
| 1242 | if (executeUpdate && dynamicResultCount > 0) { |
| 1243 | throw StandardException.newException( |
| 1244 | SQLState.LANG_INVALID_CALL_TO_EXECUTE_UPDATE); |
| 1245 | } |
| 1246 | |
| 1247 | if (dynamicResultCount == 0) { |
| 1248 | if (a.isSingleExecution()) { |
| 1249 | a.close(); |
| 1250 | } |
| 1251 | |
| 1252 | if (!forMetaData) |
| 1253 | commitIfNeeded(); |
| 1254 | else { |
| 1255 | |
| 1256 | if (lcc.getActivationCount() > 1) { |
| 1257 | // we do not want to commit here as there seems to be other |
| 1258 | // statements/resultSets currently opened for this connection. |
| 1259 | } else { |
| 1260 | commitIfNeeded(); // we can legitimately commit |
| 1261 | } |
| 1262 | } |
| 1263 | } |
| 1264 | |
| 1265 | retval = (dynamicResultCount > 0); |
| 1266 | } |
| 1267 | } catch (Throwable t) { |
| 1268 | if (a.isSingleExecution()) { |
| 1269 | try { a.close(); } catch (Throwable tt) {;} |
| 1270 | } |
| 1271 | throw handleException(t); |
| 1272 | } finally { |
| 1273 | restoreContextStack(); |
| 1274 | } |
| 1275 | return retval; |
| 1276 | } |
| 1277 | } |
| 1278 | |
| 1279 | /** |
| 1280 | * Add a SQLWarning to this Statement object. |
| 1281 | * If the Statement already has a SQLWarning then it |
| 1282 | * is added to the end of the chain. |
| 1283 | * |
| 1284 | * @see #getWarnings() |
| 1285 | */ |
| 1286 | final void addWarning(SQLWarning sw) |
| 1287 | { |
| 1288 | if (sw != null) { |
| 1289 | if (warnings == null) |
| 1290 | warnings = sw; |
| 1291 | else |
| 1292 | warnings.setNextException(sw); |
| 1293 | } |
| 1294 | } |
| 1295 | |
| 1296 | |
| 1297 | /* package */ |
| 1298 | public String getSQLText() |
| 1299 | { |
| 1300 | // no need to synchronize - accessing a reference is atomic |
| 1301 | // synchronized (getConnectionSynchronization()) |
| 1302 | return SQLText; |
| 1303 | } |
| 1304 | |
| 1305 | public ParameterValueSet getParameterValueSet() |
| 1306 | { |
| 1307 | return pvs; |
| 1308 | } |
| 1309 | |
| 1310 | /** |
| 1311 | * Throw an exception if this Statement has been closed explictly |
| 1312 | * or it has noticed it has been closed implicitly. |
| 1313 | * JDBC specifications require nearly all methods throw a SQLException |
| 1314 | * if the Statement has been closed, thus most methods call this |
| 1315 | * method or checkExecStatus first. |
| 1316 | * |
| 1317 | * @exception SQLException Thrown if the statement is marked as closed. |
| 1318 | * |
| 1319 | * @see #checkExecStatus() |
| 1320 | */ |
| 1321 | final void checkStatus() throws SQLException { |
| 1322 | |
| 1323 | if (!active) |
| 1324 | throw newSQLException(SQLState.ALREADY_CLOSED, "Statement"); |
| 1325 | } |
| 1326 | |
| 1327 | /** |
| 1328 | A heavier weight version of checkStatus() that ensures the application's Connection |
| 1329 | object is still open. This is to stop errors or unexpected behaviour when a [Prepared]Statement |
| 1330 | object is used after the application has been closed. In particular to ensure that |
| 1331 | a Statement obtained from a PooledConnection cannot be used after the application has closed |
| 1332 | its connection (as the underlying Connection is still active). |
| 1333 | To avoid this heavier weight check on every method of [Prepared]Statement it is only used |
| 1334 | on those methods that would end up using the database's connection to read or modify data. |
| 1335 | E.g. execute*(), but not setXXX, etc. |
| 1336 | <BR> |
| 1337 | If this Statement's Connection is closed an exception will |
| 1338 | be thrown and the active field will be set to false, |
| 1339 | completely marking the Statement as closed. |
| 1340 | <BR> |
| 1341 | If the Statement is not currently connected to an active |
| 1342 | transaction, i.e. a suspended global transaction, then |
| 1343 | this method will throw a SQLException but the Statement |
| 1344 | will remain open. The Statement is open but unable to |
| 1345 | process any new requests until its global transaction |
| 1346 | is resumed. |
| 1347 | <BR> |
| 1348 | Upon return from the method, with or without a SQLException |
| 1349 | the field active will correctly represent the open state of |
| 1350 | the Statement. |
| 1351 | |
| 1352 | @exception SQLException Thrown if the statement is marked as closed |
| 1353 | or the Statement's transaction is suspended. |
| 1354 | |
| 1355 | @see #checkStatus() |
| 1356 | */ |
| 1357 | final void checkExecStatus() throws SQLException { |
| 1358 | // getConnection() checks if the Statement is closed |
| 1359 | if (!getConnection().isClosed()) |
| 1360 | return; |
| 1361 | |
| 1362 | // Now this connection is closed for all |
| 1363 | // future use. |
| 1364 | active = false; |
| 1365 | |
| 1366 | throw Util.noCurrentConnection(); |
| 1367 | } |
| 1368 | |
| 1369 | /** |
| 1370 | Close and clear all result sets associated with this statement |
| 1371 | from the last execution. |
| 1372 | */ |
| 1373 | void clearResultSets() throws SQLException { |
| 1374 | |
| 1375 | SQLException sqle = null; |
| 1376 | |
| 1377 | try { |
| 1378 | // Are there results? |
| 1379 | // outside of the lower try/finally since results will |
| 1380 | // setup and restore themselves. |
| 1381 | if (results != null) { |
| 1382 | results.close(); |
| 1383 | results = null; |
| 1384 | } |
| 1385 | } catch (SQLException s1) { |
| 1386 | sqle = s1; |
| 1387 | } |
| 1388 | |
| 1389 | try { |
| 1390 | if (autoGeneratedKeysResultSet != null) { |
| 1391 | autoGeneratedKeysResultSet.close(); |
| 1392 | autoGeneratedKeysResultSet = null; |
| 1393 | } |
| 1394 | } catch (SQLException sauto) { |
| 1395 | if (sqle == null) |
| 1396 | sqle = sauto; |
| 1397 | else |
| 1398 | sqle.setNextException(sauto); |
| 1399 | } |
| 1400 | |
| 1401 | // close all the dynamic result sets. |
| 1402 | if (dynamicResults != null) { |
| 1403 | for (int i = 0; i < dynamicResults.length; i++) { |
| 1404 | EmbedResultSet lrs = dynamicResults[i]; |
| 1405 | if (lrs == null) |
| 1406 | continue; |
| 1407 | |
| 1408 | try { |
| 1409 | lrs.close(); |
| 1410 | } catch (SQLException sdynamic) { |
| 1411 | if (sqle == null) |
| 1412 | sqle = sdynamic; |
| 1413 | else |
| 1414 | sqle.setNextException(sdynamic); |
| 1415 | } |
| 1416 | } |
| 1417 | dynamicResults = null; |
| 1418 | } |
| 1419 | |
| 1420 | /* |
| 1421 | We don't reset statement to null because PreparedStatement |
| 1422 | relies on it being there for subsequent (post-close) execution |
| 1423 | requests. There is no close method on database statement objects. |
| 1424 | */ |
| 1425 | |
| 1426 | updateCount = -1; // reset field |
| 1427 | |
| 1428 | if (sqle != null) |
| 1429 | throw sqle; |
| 1430 | } |
| 1431 | |
| 1432 | /** |
| 1433 | Check to see if a statement requires to be executed via a callable statement. |
| 1434 | */ |
| 1435 | void checkRequiresCallableStatement(Activation activation) throws SQLException { |
| 1436 | |
| 1437 | ParameterValueSet pvs = activation.getParameterValueSet(); |
| 1438 | |
| 1439 | if (pvs == null) |
| 1440 | return; |
| 1441 | |
| 1442 | if (pvs.checkNoDeclaredOutputParameters()) { |
| 1443 | try { |
| 1444 | activation.close(); |
| 1445 | } catch (StandardException se) { |
| 1446 | } |
| 1447 | throw newSQLException(SQLState.REQUIRES_CALLABLE_STATEMENT, SQLText); |
| 1448 | } |
| 1449 | } |
| 1450 | |
| 1451 | /** |
| 1452 | Transfer my batch of Statements to a newly created Statement. |
| 1453 | */ |
| 1454 | public void transferBatch(EmbedStatement other) throws SQLException { |
| 1455 | |
| 1456 | synchronized (getConnectionSynchronization()) { |
| 1457 | other.batchStatements = batchStatements; |
| 1458 | batchStatements = null; |
| 1459 | } |
| 1460 | } |
| 1461 | |
| 1462 | /** |
| 1463 | * Set the application statement for this Statement. |
| 1464 | */ |
| 1465 | public final void setApplicationStatement(EngineStatement s) { |
| 1466 | this.applicationStatement = s; |
| 1467 | } |
| 1468 | |
| 1469 | private EmbedResultSet[] dynamicResults; |
| 1470 | private int currentDynamicResultSet; |
| 1471 | |
| 1472 | /** |
| 1473 | * Go through a holder of dynamic result sets, remove those that |
| 1474 | * should not be returned, and sort the result sets according to |
| 1475 | * their creation. |
| 1476 | * |
| 1477 | * @param holder a holder of dynamic result sets |
| 1478 | * @param maxDynamicResultSets the maximum number of result sets |
| 1479 | * to be returned |
| 1480 | * @return the actual number of result sets |
| 1481 | * @exception SQLException if an error occurs |
| 1482 | */ |
| 1483 | private int processDynamicResults(java.sql.ResultSet[][] holder, |
| 1484 | int maxDynamicResultSets) |
| 1485 | throws SQLException |
| 1486 | { |
| 1487 | |
| 1488 | EmbedResultSet[] sorted = new EmbedResultSet[holder.length]; |
| 1489 | |
| 1490 | int actualCount = 0; |
| 1491 | for (int i = 0; i < holder.length; i++) { |
| 1492 | |
| 1493 | java.sql.ResultSet[] param = holder[i]; |
| 1494 | |
| 1495 | if (param[0] == null) |
| 1496 | continue; |
| 1497 | |
| 1498 | java.sql.ResultSet rs = param[0]; |
| 1499 | param[0] = null; |
| 1500 | |
| 1501 | // ignore non-cloudscape result sets or results sets from another connection |
| 1502 | if (!(rs instanceof EmbedResultSet)) |
| 1503 | continue; |
| 1504 | |
| 1505 | EmbedResultSet lrs = (EmbedResultSet) rs; |
| 1506 | |
| 1507 | if (lrs.getEmbedConnection().rootConnection != getEmbedConnection().rootConnection) |
| 1508 | continue; |
| 1509 | |
| 1510 | // ignore closed result sets. |
| 1511 | if (lrs.isClosed) |
| 1512 | continue; |
| 1513 | |
| 1514 | lrs.setDynamicResultSet(this); |
| 1515 | sorted[actualCount++] = lrs; |
| 1516 | } |
| 1517 | |
| 1518 | if (actualCount != 0) { |
| 1519 | |
| 1520 | // results are defined to be ordered according to their creation |
| 1521 | if (actualCount != 1) { |
| 1522 | java.util.Arrays.sort(sorted, 0, actualCount); |
| 1523 | } |
| 1524 | |
| 1525 | dynamicResults = sorted; |
| 1526 | |
| 1527 | if (actualCount > maxDynamicResultSets) { |
| 1528 | addWarning(StandardException.newWarning(SQLState.LANG_TOO_MANY_DYNAMIC_RESULTS_RETURNED)); |
| 1529 | |
| 1530 | for (int i = maxDynamicResultSets; i < actualCount; i++) { |
| 1531 | sorted[i].close(); |
| 1532 | sorted[i] = null; |
| 1533 | } |
| 1534 | |
| 1535 | actualCount = maxDynamicResultSets; |
| 1536 | } |
| 1537 | |
| 1538 | |
| 1539 | updateCount = -1; |
| 1540 | results = sorted[0]; |
| 1541 | currentDynamicResultSet = 0; |
| 1542 | |
| 1543 | // 0100C is not returned for procedures written in Java, from the SQL2003 spec. |
| 1544 | // getWarnings(StandardException.newWarning(SQLState.LANG_DYNAMIC_RESULTS_RETURNED)); |
| 1545 | } |
| 1546 | |
| 1547 | |
| 1548 | return actualCount; |
| 1549 | } |
| 1550 | |
| 1551 | /** |
| 1552 | Callback on the statement when one of its result sets is closed. |
| 1553 | This allows the statement to control when it completes and hence |
| 1554 | when it commits in auto commit mode. |
| 1555 | |
| 1556 | Must have connection synchronization and setupContextStack(), this |
| 1557 | is required for the call to commitIfNeeded(). |
| 1558 | */ |
| 1559 | void resultSetClosing(EmbedResultSet closingLRS) throws SQLException { |
| 1560 | |
| 1561 | // If the Connection is not in auto commit then this statement completion |
| 1562 | // cannot cause a commit. |
| 1563 | if (!getEmbedConnection().autoCommit) |
| 1564 | return; |
| 1565 | |
| 1566 | // If we have dynamic results, see if there is another result set open. |
| 1567 | // If so, then no commit. The last result set to close will close the statement. |
| 1568 | if (dynamicResults != null) { |
| 1569 | for (int i = 0; i < dynamicResults.length; i++) { |
| 1570 | EmbedResultSet lrs = dynamicResults[i]; |
| 1571 | if (lrs == null) |
| 1572 | continue; |
| 1573 | if (lrs.isClosed) |
| 1574 | continue; |
| 1575 | if (lrs == closingLRS) |
| 1576 | continue; |
| 1577 | |
| 1578 | // at least one still open so no commit now. |
| 1579 | return; |
| 1580 | } |
| 1581 | } |
| 1582 | |
| 1583 | // new Throwable("COMMIT ON " + SQLText).printStackTrace(System.out); |
| 1584 | |
| 1585 | // beetle 5383. Force a commit in autocommit always. Before this |
| 1586 | // change if client in autocommit opened a result set, did a commit, |
| 1587 | // then next then close a commit would not be forced on the close. |
| 1588 | commitIfAutoCommit(); |
| 1589 | } |
| 1590 | |
| 1591 | /** |
| 1592 | * Get the execute time holdability for the Statement. |
| 1593 | * When in a global transaction holdabilty defaults to false. |
| 1594 | * @throws SQLException Error from getResultSetHoldability. |
| 1595 | */ |
| 1596 | private boolean getExecuteHoldable() throws SQLException |
| 1597 | { |
| 1598 | if (resultSetHoldability == JDBC30Translation.CLOSE_CURSORS_AT_COMMIT) |
| 1599 | return false; |
| 1600 | |
| 1601 | // Simple non-XA case |
| 1602 | if (applicationStatement == this) |
| 1603 | return true; |
| 1604 | |
| 1605 | return applicationStatement.getResultSetHoldability() == |
| 1606 | JDBC30Translation.HOLD_CURSORS_OVER_COMMIT; |
| 1607 | } |
| 1608 | |
| 1609 | /** |
| 1610 | * Returns the value of the EmbedStatement's poolable hint, |
| 1611 | * indicating whether pooling is requested. |
| 1612 | * |
| 1613 | * @return The value of the poolable hint. |
| 1614 | * @throws SQLException if the Statement has been closed. |
| 1615 | */ |
| 1616 | |
| 1617 | public boolean isPoolable() throws SQLException { |
| 1618 | // Assert the statement is still active (not closed) |
| 1619 | checkStatus(); |
| 1620 | |
| 1621 | return isPoolable; |
| 1622 | } |
| 1623 | |
| 1624 | /** |
| 1625 | * Requests that an EmbedStatement be pooled or not. |
| 1626 | * |
| 1627 | * @param poolable requests that the EmbedStatement be pooled if true |
| 1628 | * and not be pooled if false. |
| 1629 | * @throws SQLException if the EmbedStatement has been closed. |
| 1630 | */ |
| 1631 | |
| 1632 | public void setPoolable(boolean poolable) throws SQLException { |
| 1633 | // Assert the statement is still active (not closed) |
| 1634 | checkStatus(); |
| 1635 | |
| 1636 | isPoolable = poolable; |
| 1637 | } |
| 1638 | } |
| 1639 | |