| 1 | /* ============================================================= |
| 2 | * SmallSQL : a free Java DBMS library for the Java(tm) platform |
| 3 | * ============================================================= |
| 4 | * |
| 5 | * (C) Copyright 2004-2006, by Volker Berlin. |
| 6 | * |
| 7 | * Project Info: http://www.smallsql.de/ |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU Lesser General Public License as published by |
| 11 | * the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 17 | * License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| 22 | * USA. |
| 23 | * |
| 24 | * [Java is a trademark or registered trademark of Sun Microsystems, Inc. |
| 25 | * in the United States and other countries.] |
| 26 | * |
| 27 | * --------------- |
| 28 | * SQLParser.java |
| 29 | * --------------- |
| 30 | * Author: Volker Berlin |
| 31 | * |
| 32 | */ |
| 33 | package smallsql.database; |
| 34 | |
| 35 | import java.util.List; |
| 36 | import java.sql.*; |
| 37 | |
| 38 | |
| 39 | public class SQLParser { |
| 40 | |
| 41 | SSConnection con; |
| 42 | private char[] sql; |
| 43 | private List tokens; |
| 44 | private int tokenIdx; |
| 45 | |
| 46 | Command parse(SSConnection con, String sql) throws SQLException{ |
| 47 | this.con = con; |
| 48 | Command cmd = parse( sql.toCharArray() ); |
| 49 | SQLToken token = nextToken(); |
| 50 | if(token != null){ |
| 51 | throw createSyntaxError( token, "Additional token after end of SQL statement"); |
| 52 | } |
| 53 | return cmd; |
| 54 | } |
| 55 | |
| 56 | |
| 57 | final private Command parse(char[] sql) throws SQLException{ |
| 58 | this.sql = sql; |
| 59 | this.tokens = SQLTokenizer.parseSQL( sql ); |
| 60 | tokenIdx = 0; |
| 61 | |
| 62 | SQLToken token = nextToken(COMMANDS); |
| 63 | switch (token.value){ |
| 64 | case SQLTokenizer.SELECT: |
| 65 | return select(); |
| 66 | case SQLTokenizer.DELETE: |
| 67 | return delete(); |
| 68 | case SQLTokenizer.INSERT: |
| 69 | return insert(); |
| 70 | case SQLTokenizer.UPDATE: |
| 71 | return update(); |
| 72 | case SQLTokenizer.CREATE: |
| 73 | return create(); |
| 74 | case SQLTokenizer.DROP: |
| 75 | return drop(); |
| 76 | case SQLTokenizer.ALTER: |
| 77 | return alter(); |
| 78 | case SQLTokenizer.SET: |
| 79 | return set(); |
| 80 | case SQLTokenizer.USE: |
| 81 | token = nextToken(MISSING_EXPRESSION); |
| 82 | String name = token.getName( sql ); |
| 83 | checkValidIdentifer( name, token ); |
| 84 | CommandSet set = new CommandSet( con.log, SQLTokenizer.USE); |
| 85 | set.name = name; |
| 86 | return set; |
| 87 | case SQLTokenizer.EXECUTE: |
| 88 | return execute(); |
| 89 | case SQLTokenizer.TRUNCATE: |
| 90 | return truncate(); |
| 91 | default: |
| 92 | throw new Error(); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | |
| 97 | Expression parseExpression(String expr) throws SQLException{ |
| 98 | this.sql = expr.toCharArray(); |
| 99 | this.tokens = SQLTokenizer.parseSQL( sql ); |
| 100 | tokenIdx = 0; |
| 101 | return expression( null, 0); |
| 102 | } |
| 103 | |
| 104 | private StringBuffer getSyntaxError( SQLToken token ){ |
| 105 | StringBuffer msg = new StringBuffer(256); |
| 106 | if(token != null){ |
| 107 | msg.append( "Syntax error at offset ").append( token.offset ) |
| 108 | .append( " on '" ).append( sql, token.offset, token.length ).append("'. "); |
| 109 | }else{ |
| 110 | msg.append( "Syntax error, unexpected end of SQL string. "); |
| 111 | } |
| 112 | return msg; |
| 113 | } |
| 114 | |
| 115 | private SQLException createSyntaxError(SQLToken token, int[] validValues){ |
| 116 | StringBuffer msg = getSyntaxError( token ); |
| 117 | |
| 118 | msg.append( "Requied keywords are: " ); |
| 119 | for(int i=0; i<validValues.length; i++){ |
| 120 | String name = SQLTokenizer.getKeyWord(validValues[i]); |
| 121 | if(name == null) name = String.valueOf( (char)validValues[i] ); |
| 122 | msg.append( name ); |
| 123 | if (i < validValues.length - 2) |
| 124 | msg.append( ", "); |
| 125 | else |
| 126 | if ( i == validValues.length - 2 ) |
| 127 | msg.append( " or "); |
| 128 | } |
| 129 | |
| 130 | return createSyntaxError( msg, token ); |
| 131 | } |
| 132 | |
| 133 | private SQLException createSyntaxError( StringBuffer msg, SQLToken token){ |
| 134 | int offset = (token != null) ? token.offset : sql.length; |
| 135 | int begin = Math.max( 0, offset-40); |
| 136 | int end = Math.min( offset+20, sql.length ); |
| 137 | String lineSeparator = System.getProperty( "line.separator" ); |
| 138 | msg.append( lineSeparator ); |
| 139 | msg.append( sql, begin, end-begin); |
| 140 | msg.append( lineSeparator ); |
| 141 | for(; begin<offset; begin++) msg.append(' '); |
| 142 | msg.append('^'); |
| 143 | return new SQLException( msg.toString()/* , offset*/ ); |
| 144 | } |
| 145 | |
| 146 | private SQLException createSyntaxError(SQLToken token, String errorMsg){ |
| 147 | StringBuffer msg = getSyntaxError( token ).append(errorMsg); |
| 148 | return createSyntaxError( msg, token ); |
| 149 | } |
| 150 | |
| 151 | |
| 152 | private void checkValidIdentifer(String name, SQLToken token) throws SQLException{ |
| 153 | if(token.value == SQLTokenizer.ASTERISK) return; |
| 154 | if(token.value != SQLTokenizer.VALUE && |
| 155 | token.value != SQLTokenizer.IDENTIFER && |
| 156 | token.value < 200){ |
| 157 | throw createSyntaxError( token, "Identifer expected."); |
| 158 | } |
| 159 | if(name.length() == 0) |
| 160 | throw createSyntaxError( token, "Empty Identifer."); |
| 161 | if(name.charAt(0) < '@') |
| 162 | throw createSyntaxError( token, "Wrong Identifer '" + name + "'."); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | final private boolean isKeyword(SQLToken token){ |
| 167 | if(token == null) return false; |
| 168 | switch(token.value){ |
| 169 | case SQLTokenizer.SELECT: |
| 170 | case SQLTokenizer.INSERT: |
| 171 | case SQLTokenizer.UPDATE: |
| 172 | case SQLTokenizer.UNION: |
| 173 | case SQLTokenizer.FROM: |
| 174 | case SQLTokenizer.WHERE: |
| 175 | case SQLTokenizer.GROUP: |
| 176 | case SQLTokenizer.HAVING: |
| 177 | case SQLTokenizer.ORDER: |
| 178 | case SQLTokenizer.COMMA: |
| 179 | case SQLTokenizer.SET: |
| 180 | return true; |
| 181 | } |
| 182 | return false; |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Return the last token that the method nextToken has return |
| 187 | */ |
| 188 | private SQLToken lastToken(){ |
| 189 | if(tokenIdx > tokens.size()){ |
| 190 | return null; |
| 191 | } |
| 192 | return (SQLToken)tokens.get( tokenIdx-1 ); |
| 193 | } |
| 194 | private void previousToken(){ |
| 195 | tokenIdx--; |
| 196 | } |
| 197 | |
| 198 | private SQLToken nextToken(){ |
| 199 | if(tokenIdx >= tokens.size()){ |
| 200 | tokenIdx++; // erhöht werden, damit previousToken() funktioniert |
| 201 | return null; |
| 202 | } |
| 203 | return (SQLToken)tokens.get( tokenIdx++ ); |
| 204 | } |
| 205 | |
| 206 | private SQLToken nextToken( int[] validValues) throws SQLException{ |
| 207 | SQLToken token = nextToken(); |
| 208 | if(token == null) throw createSyntaxError( token, validValues); |
| 209 | if(validValues == MISSING_EXPRESSION) return token; // eine Expression kann in jedem Token enthalten sein |
| 210 | if(validValues == MISSING_IDENTIFER){ |
| 211 | // folgende Token sind keine gültigen Identifer |
| 212 | switch(token.value){ |
| 213 | case SQLTokenizer.PARENTHESIS_L: |
| 214 | case SQLTokenizer.PARENTHESIS_R: |
| 215 | case SQLTokenizer.COMMA: |
| 216 | throw createSyntaxError( token, validValues); |
| 217 | } |
| 218 | return token; |
| 219 | } |
| 220 | for(int i=validValues.length-1; i>=0; i--){ |
| 221 | if(token.value == validValues[i]) return token; |
| 222 | } |
| 223 | throw createSyntaxError( token, validValues); |
| 224 | } |
| 225 | |
| 226 | |
| 227 | /** |
| 228 | * A single SELECT of a UNION or only a simple single SELECT. |
| 229 | * @return |
| 230 | * @throws SQLException |
| 231 | */ |
| 232 | private CommandSelect singleSelect() throws SQLException{ |
| 233 | CommandSelect selCmd = new CommandSelect(con.log); |
| 234 | SQLToken token; |
| 235 | // scan for prefixe like DISTINCT, ALL and the TOP clause; sample: SELECT TOP 15 ... |
| 236 | Switch: while(true){ |
| 237 | token = nextToken(MISSING_EXPRESSION); |
| 238 | switch(token.value){ |
| 239 | case SQLTokenizer.TOP: |
| 240 | token = nextToken(MISSING_EXPRESSION); |
| 241 | try{ |
| 242 | int maxRows = Integer.parseInt(token.getName(sql)); |
| 243 | selCmd.setMaxRows(maxRows); |
| 244 | }catch(Exception e){ |
| 245 | throw createSyntaxError(token, e.getMessage()); |
| 246 | } |
| 247 | break; |
| 248 | case SQLTokenizer.ALL: |
| 249 | selCmd.setDistinct(false); |
| 250 | break; |
| 251 | case SQLTokenizer.DISTINCT: |
| 252 | selCmd.setDistinct(true); |
| 253 | break; |
| 254 | default: |
| 255 | previousToken(); |
| 256 | break Switch; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | while(true){ |
| 261 | Expression column = expression(selCmd, 0); |
| 262 | selCmd.addColumnExpression( column ); |
| 263 | |
| 264 | token = nextToken(); |
| 265 | if(token == null) return selCmd; // SELECT ohne FROM |
| 266 | |
| 267 | boolean as = false; |
| 268 | if(token.value == SQLTokenizer.AS){ |
| 269 | token = nextToken(MISSING_EXPRESSION); |
| 270 | as = true; |
| 271 | } |
| 272 | |
| 273 | if(as || (!isKeyword(token))){ |
| 274 | String alias = token.getName( sql ); |
| 275 | checkValidIdentifer( alias, token); |
| 276 | column.setAlias( alias ); |
| 277 | token = nextToken(); |
| 278 | if(token == null) return selCmd; // SELECT ohne FROM |
| 279 | } |
| 280 | |
| 281 | switch(token.value){ |
| 282 | case SQLTokenizer.COMMA: |
| 283 | if(column == null) throw createSyntaxError( token, MISSING_EXPRESSION ); |
| 284 | column = null; |
| 285 | break; |
| 286 | case SQLTokenizer.FROM: |
| 287 | if(column == null) throw createSyntaxError( token, MISSING_EXPRESSION ); |
| 288 | column = null; |
| 289 | from(selCmd); |
| 290 | return selCmd; |
| 291 | |
| 292 | default: |
| 293 | if(!isKeyword(token)) |
| 294 | throw createSyntaxError( token, new int[]{SQLTokenizer.COMMA, SQLTokenizer.FROM} ); |
| 295 | previousToken(); |
| 296 | return selCmd; |
| 297 | } |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | |
| 302 | final private CommandSelect select() throws SQLException{ |
| 303 | CommandSelect selCmd = singleSelect(); |
| 304 | SQLToken token = nextToken(); |
| 305 | |
| 306 | UnionAll union = null; |
| 307 | |
| 308 | while(token != null && token.value == SQLTokenizer.UNION){ |
| 309 | if(union == null){ |
| 310 | union = new UnionAll(); |
| 311 | union.addDataSource(new ViewResult( con, selCmd )); |
| 312 | selCmd = new CommandSelect(con.log); |
| 313 | selCmd.setSource( union ); |
| 314 | DataSources from = new DataSources(); |
| 315 | from.add(union); |
| 316 | selCmd.setFrom( from ); |
| 317 | selCmd.addColumnExpression( new ExpressionName("*") ); |
| 318 | } |
| 319 | nextToken(MISSING_ALL); |
| 320 | nextToken(MISSING_SELECT); |
| 321 | union.addDataSource( new ViewResult( con, singleSelect() ) ); |
| 322 | token = nextToken(); |
| 323 | } |
| 324 | if(token != null && token.value == SQLTokenizer.ORDER){ |
| 325 | order( selCmd ); |
| 326 | }else{ |
| 327 | previousToken(); |
| 328 | } |
| 329 | return selCmd; |
| 330 | } |
| 331 | |
| 332 | |
| 333 | private Command delete() throws SQLException{ |
| 334 | CommandDelete cmd = new CommandDelete(con.log); |
| 335 | nextToken(MISSING_FROM); |
| 336 | from(cmd); |
| 337 | SQLToken token = nextToken(); |
| 338 | if(token != null){ |
| 339 | if(token.value != SQLTokenizer.WHERE) |
| 340 | throw this.createSyntaxError(token, MISSING_WHERE); |
| 341 | where(cmd); |
| 342 | } |
| 343 | return cmd; |
| 344 | } |
| 345 | |
| 346 | |
| 347 | private Command truncate() throws SQLException{ |
| 348 | CommandDelete cmd = new CommandDelete(con.log); |
| 349 | nextToken(MISSING_TABLE); |
| 350 | from(cmd); |
| 351 | return cmd; |
| 352 | } |
| 353 | |
| 354 | |
| 355 | private Command insert() throws SQLException{ |
| 356 | SQLToken token = nextToken( MISSING_INTO ); |
| 357 | token = nextToken( MISSING_IDENTIFER ); |
| 358 | CommandInsert cmd = new CommandInsert( con.log, token.getName(sql) ); |
| 359 | |
| 360 | int parthesisCount = 0; |
| 361 | |
| 362 | token = nextToken(MISSING_PARENTHESIS_VALUES_SELECT); |
| 363 | if(token.value == SQLTokenizer.PARENTHESIS_L){ |
| 364 | token = nextToken(MISSING_EXPRESSION); |
| 365 | if(token.value == SQLTokenizer.SELECT){ |
| 366 | parthesisCount++; |
| 367 | cmd.noColumns = true; |
| 368 | }else{ |
| 369 | previousToken(); |
| 370 | Expressions list = expressionParenthesisList(cmd); |
| 371 | for(int i=0; i<list.size(); i++){ |
| 372 | cmd.addColumnExpression( list.get( i ) ); |
| 373 | } |
| 374 | token = nextToken(MISSING_PARENTHESIS_VALUES_SELECT); |
| 375 | } |
| 376 | }else cmd.noColumns = true; |
| 377 | |
| 378 | Switch: while(true) |
| 379 | switch(token.value){ |
| 380 | case SQLTokenizer.VALUES:{ |
| 381 | token = nextToken(MISSING_PARENTHESIS_L); |
| 382 | cmd.addValues( expressionParenthesisList(cmd) ); |
| 383 | return cmd; |
| 384 | } |
| 385 | case SQLTokenizer.SELECT: |
| 386 | cmd.addValues( select() ); |
| 387 | while(parthesisCount-- > 0){ |
| 388 | nextToken(MISSING_PARENTHESIS_R); |
| 389 | } |
| 390 | return cmd; |
| 391 | case SQLTokenizer.PARENTHESIS_L: |
| 392 | token = nextToken(MISSING_PARENTHESIS_VALUES_SELECT); |
| 393 | parthesisCount++; |
| 394 | continue Switch; |
| 395 | default: |
| 396 | throw new Error(); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | |
| 401 | private Command update() throws SQLException{ |
| 402 | CommandUpdate cmd = new CommandUpdate(con.log); |
| 403 | // read table name |
| 404 | DataSources tables = new DataSources(); |
| 405 | cmd.setFrom( tables ); |
| 406 | cmd.setSource( rowSource( cmd, tables, 0 ) ); |
| 407 | |
| 408 | SQLToken token = nextToken(MISSING_SET); |
| 409 | while(true){ |
| 410 | token = nextToken(); |
| 411 | Expression dest = expressionSingle( cmd, token); |
| 412 | if(dest.getType() != Expression.NAME) throw createSyntaxError( token, MISSING_IDENTIFER ); |
| 413 | nextToken(MISSING_EQUALS); |
| 414 | Expression src = expression(cmd, 0); |
| 415 | cmd.addSetting( dest, src); |
| 416 | token = nextToken(); |
| 417 | if(token == null) break; |
| 418 | switch(token.value){ |
| 419 | case SQLTokenizer.WHERE: |
| 420 | where(cmd); |
| 421 | return cmd; |
| 422 | case SQLTokenizer.COMMA: |
| 423 | continue; |
| 424 | default: throw createSyntaxError( token, MISSING_WHERE_COMMA ); |
| 425 | } |
| 426 | } |
| 427 | return cmd; |
| 428 | } |
| 429 | |
| 430 | |
| 431 | private Command create() throws SQLException{ |
| 432 | SQLToken token = nextToken(); |
| 433 | if(token == null) throw createSyntaxError( token, COMMANDS_CREATE ); |
| 434 | switch(token.value){ |
| 435 | case SQLTokenizer.DATABASE: |
| 436 | return createDatabase(); |
| 437 | case SQLTokenizer.TABLE: |
| 438 | return createTable(); |
| 439 | case SQLTokenizer.VIEW: |
| 440 | return createView(); |
| 441 | case SQLTokenizer.INDEX: |
| 442 | return createIndex(); |
| 443 | case SQLTokenizer.PROCEDURE: |
| 444 | return createProcedure(); |
| 445 | default: |
| 446 | throw createSyntaxError( token, COMMANDS_CREATE ); |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | |
| 451 | private CommandCreateDatabase createDatabase() throws SQLException{ |
| 452 | SQLToken token = nextToken(); |
| 453 | if(token == null) throw createSyntaxError( token, MISSING_EXPRESSION ); |
| 454 | return new CommandCreateDatabase( con.log, token.getName(sql)); |
| 455 | } |
| 456 | |
| 457 | |
| 458 | private CommandCreateTable createTable() throws SQLException{ |
| 459 | SQLToken token = nextToken( MISSING_IDENTIFER ); // table name |
| 460 | String tableName = token.getName(sql); |
| 461 | CommandCreateTable cmdCreate = new CommandCreateTable( con.log, tableName); |
| 462 | token = nextToken( MISSING_PARENTHESIS_L ); |
| 463 | |
| 464 | nextCol: |
| 465 | while(true){ |
| 466 | token = nextToken( MISSING_EXPRESSION ); |
| 467 | |
| 468 | String constraintName; |
| 469 | if(token.value == SQLTokenizer.CONSTRAINT){ |
| 470 | // reading a CONSTRAINT with name |
| 471 | token = nextToken( MISSING_IDENTIFER ); |
| 472 | constraintName = token.getName(sql); |
| 473 | checkValidIdentifer( constraintName, token ); |
| 474 | |
| 475 | token = nextToken( MISSING_KEYTYPE ); |
| 476 | }else{ |
| 477 | constraintName = null; |
| 478 | } |
| 479 | switch(token.value){ |
| 480 | case SQLTokenizer.PRIMARY: |
| 481 | case SQLTokenizer.UNIQUE: |
| 482 | case SQLTokenizer.FOREIGN: |
| 483 | IndexDescription index = index(cmdCreate, token.value, null); |
| 484 | index.setName(constraintName); |
| 485 | if(token.value == SQLTokenizer.FOREIGN){ |
| 486 | nextToken( MISSING_REFERENCES ); |
| 487 | token = nextToken( MISSING_IDENTIFER ); |
| 488 | String pk = token.getName(sql); |
| 489 | Expressions expressions = new Expressions(); |
| 490 | Strings columns = new Strings(); |
| 491 | expressionDefList( cmdCreate, expressions, columns ); |
| 492 | IndexDescription pkIndex = new IndexDescription( SQLTokenizer.UNIQUE, expressions, columns); |
| 493 | ForeignKey foreignKey = new ForeignKey(pk, pkIndex, tableName, index); |
| 494 | cmdCreate.addForeingnKey(foreignKey); |
| 495 | }else{ |
| 496 | cmdCreate.addIndex( index ); |
| 497 | } |
| 498 | |
| 499 | token = nextToken( MISSING_COMMA_PARENTHESIS ); |
| 500 | switch(token.value){ |
| 501 | case SQLTokenizer.PARENTHESIS_R: |
| 502 | return cmdCreate; |
| 503 | case SQLTokenizer.COMMA: |
| 504 | continue nextCol; |
| 505 | } |
| 506 | } |
| 507 | // the token is a column name |
| 508 | String colName = token.getName( sql ); |
| 509 | |
| 510 | Column col = datatype(false); |
| 511 | col.setName( colName ); |
| 512 | |
| 513 | token = nextToken(MISSING_OPTIONS_DATATYPE); |
| 514 | boolean nullableWasSet = false; |
| 515 | boolean defaultWasSet = col.isAutoIncrement(); // with data type COUNTER allready this value is set |
| 516 | while(true){ |
| 517 | switch(token.value){ |
| 518 | case SQLTokenizer.PARENTHESIS_R: |
| 519 | cmdCreate.addColumn( col ); |
| 520 | return cmdCreate; |
| 521 | case SQLTokenizer.COMMA: |
| 522 | cmdCreate.addColumn( col ); |
| 523 | continue nextCol; |
| 524 | case SQLTokenizer.DEFAULT: |
| 525 | if(defaultWasSet) throw createSyntaxError( token, MISSING_COMMA_PARENTHESIS ); |
| 526 | int offset = token.offset + token.length; |
| 527 | token = nextToken(); |
| 528 | if(token != null) offset = token.offset; |
| 529 | previousToken(); |
| 530 | Expression expr = expression(cmdCreate, 0); |
| 531 | SQLToken last = lastToken(); |
| 532 | int length = last.offset + last.length - offset; |
| 533 | String def = new String( sql, offset, length ); |
| 534 | col.setDefaultValue( expr, def ); |
| 535 | defaultWasSet = true; |
| 536 | break; |
| 537 | case SQLTokenizer.IDENTITY: |
| 538 | if(defaultWasSet) throw createSyntaxError( token, MISSING_COMMA_PARENTHESIS ); |
| 539 | col.setAutoIncrement(true); |
| 540 | defaultWasSet = true; |
| 541 | break; |
| 542 | case SQLTokenizer.NULL: |
| 543 | if(nullableWasSet) throw createSyntaxError( token, MISSING_COMMA_PARENTHESIS ); |
| 544 | //col.setNullable(true); ist bereits default |
| 545 | nullableWasSet = true; |
| 546 | break; |
| 547 | case SQLTokenizer.NOT: |
| 548 | if(nullableWasSet) throw createSyntaxError( token, MISSING_COMMA_PARENTHESIS ); |
| 549 | token = nextToken( MISSING_NULL ); |
| 550 | col.setNullable(false); |
| 551 | nullableWasSet = true; |
| 552 | break; |
| 553 | case SQLTokenizer.PARENTHESIS_L: |
| 554 | throw createSyntaxError(token, MISSING_COMMA_PARENTHESIS); |
| 555 | case SQLTokenizer.PRIMARY: |
| 556 | case SQLTokenizer.UNIQUE: |
| 557 | IndexDescription index = index(cmdCreate, token.value, colName); |
| 558 | cmdCreate.addIndex( index ); |
| 559 | break; |
| 560 | default: |
| 561 | throw new Error(); |
| 562 | } |
| 563 | token = nextToken( MISSING_OPTIONS_DATATYPE ); |
| 564 | } |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * Parse construct like:<br> |
| 570 | * <li>PRIMARY KEY (col1) |
| 571 | * <li>UNIQUE (col1, col2) |
| 572 | * <li>FOREIGN KEY REFERENCES ref_table(col1) |
| 573 | * @param cmd |
| 574 | * @param constraintType one of SQLTokenizer.PRIMARY, SQLTokenizer.UNIQUE or SQLTokenizer.FOREIGN. |
| 575 | * @param if it a constrain of the current column else null |
| 576 | * @return a new IndexDescription |
| 577 | */ |
| 578 | private IndexDescription index(Command cmd, int constraintType, String columnName) throws SQLException{ |
| 579 | if(constraintType != SQLTokenizer.UNIQUE) nextToken( MISSING_KEY ); |
| 580 | SQLToken token = nextToken( MISSING_EXPRESSION ); |
| 581 | switch(token.value){ |
| 582 | case SQLTokenizer.CLUSTERED: |
| 583 | case SQLTokenizer.NONCLUSTERED: |
| 584 | // skipping, this tokens form MS SQL Server are ignored |
| 585 | token = nextToken( MISSING_EXPRESSION ); |
| 586 | break; |
| 587 | } |
| 588 | Strings columns = new Strings(); |
| 589 | Expressions expressions = new Expressions(); |
| 590 | if(columnName != null){ |
| 591 | //Constraint for a single column together with the column defination |
| 592 | columns.add(columnName); |
| 593 | expressions.add(new ExpressionName(columnName)); |
| 594 | previousToken(); |
| 595 | }else{ |
| 596 | //Constraint as addition defination |
| 597 | previousToken(); |
| 598 | expressionDefList( cmd, expressions, columns ); |
| 599 | } |
| 600 | |
| 601 | return new IndexDescription( constraintType, expressions, columns); |
| 602 | } |
| 603 | |
| 604 | |
| 605 | /** |
| 606 | * Read a DataTpe description. This is used for CREATE TABLE and CONVERT function. |
| 607 | * @param isEscape true then the datatypes start with SQL_ |
| 608 | */ |
| 609 | private Column datatype(boolean isEscape) throws SQLException{ |
| 610 | SQLToken token; |
| 611 | int dataType; |
| 612 | if(isEscape){ |
| 613 | token = nextToken( MISSING_SQL_DATATYPE ); |
| 614 | switch(token.value){ |
| 615 | case SQLTokenizer.SQL_BIGINT: dataType = SQLTokenizer.BIGINT; break; |
| 616 | case SQLTokenizer.SQL_BINARY: dataType = SQLTokenizer.BINARY; break; |
| 617 | case SQLTokenizer.SQL_BIT: dataType = SQLTokenizer.BIT; break; |
| 618 | case SQLTokenizer.SQL_CHAR: dataType = SQLTokenizer.CHAR; break; |
| 619 | case SQLTokenizer.SQL_DATE: dataType = SQLTokenizer.DATE; break; |
| 620 | case SQLTokenizer.SQL_DECIMAL: dataType = SQLTokenizer.DECIMAL; break; |
| 621 | case SQLTokenizer.SQL_DOUBLE: dataType = SQLTokenizer.DOUBLE; break; |
| 622 | case SQLTokenizer.SQL_FLOAT: dataType = SQLTokenizer.FLOAT; break; |
| 623 | case SQLTokenizer.SQL_INTEGER: dataType = SQLTokenizer.INT; break; |
| 624 | case SQLTokenizer.SQL_LONGVARBINARY: dataType = SQLTokenizer.LONGVARBINARY;break; |
| 625 | case SQLTokenizer.SQL_LONGVARCHAR: dataType = SQLTokenizer.LONGVARCHAR;break; |
| 626 | case SQLTokenizer.SQL_REAL: dataType = SQLTokenizer.REAL; break; |
| 627 | case SQLTokenizer.SQL_SMALLINT: dataType = SQLTokenizer.SMALLINT; break; |
| 628 | case SQLTokenizer.SQL_TIME: dataType = SQLTokenizer.TIME; break; |
| 629 | case SQLTokenizer.SQL_TIMESTAMP: dataType = SQLTokenizer.TIMESTAMP; break; |
| 630 | case SQLTokenizer.SQL_TINYINT: dataType = SQLTokenizer.TINYINT; break; |
| 631 | case SQLTokenizer.SQL_VARBINARY: dataType = SQLTokenizer.VARBINARY; break; |
| 632 | case SQLTokenizer.SQL_VARCHAR: dataType = SQLTokenizer.VARCHAR; break; |
| 633 | default: throw new Error(); |
| 634 | } |
| 635 | }else{ |
| 636 | token = nextToken( MISSING_DATATYPE ); |
| 637 | dataType = token.value; |
| 638 | } |
| 639 | Column col = new Column(); |
| 640 | |
| 641 | // zweiteiliger Datentyp |
| 642 | if(dataType == SQLTokenizer.LONG){ |
| 643 | token = nextToken(); |
| 644 | if(token != null && token.value == SQLTokenizer.RAW){ |
| 645 | dataType = SQLTokenizer.LONGVARBINARY; |
| 646 | }else{ |
| 647 | dataType = SQLTokenizer.LONGVARCHAR; |
| 648 | previousToken(); |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | token = nextToken( MISSING_OPTIONS_DATATYPE ); |
| 653 | switch(dataType){ |
| 654 | case SQLTokenizer.RAW: |
| 655 | dataType = SQLTokenizer.VARBINARY; |
| 656 | // no break; |
| 657 | case SQLTokenizer.CHAR: |
| 658 | case SQLTokenizer.VARCHAR: |
| 659 | case SQLTokenizer.NCHAR: |
| 660 | case SQLTokenizer.NVARCHAR: |
| 661 | case SQLTokenizer.BINARY: |
| 662 | case SQLTokenizer.VARBINARY: |
| 663 | { |
| 664 | // maximale Spaltengröße ermitteln |
| 665 | int displaySize; |
| 666 | if(token.value != SQLTokenizer.PARENTHESIS_L){ |
| 667 | displaySize = 30; |
| 668 | }else{ |
| 669 | token = nextToken( MISSING_EXPRESSION ); |
| 670 | try{ |
| 671 | displaySize = Integer.parseInt(token.getName(sql) ); |
| 672 | }catch(Exception e){ |
| 673 | throw createSyntaxError(token, MISSING_NUMBERVALUE ); |
| 674 | } |
| 675 | nextToken( MISSING_PARENTHESIS_R ); |
| 676 | token = nextToken(MISSING_OPTIONS_DATATYPE); |
| 677 | } |
| 678 | col.setPrecision( displaySize ); |
| 679 | break; |
| 680 | } |
| 681 | case SQLTokenizer.SYSNAME: |
| 682 | col.setPrecision(255); |
| 683 | dataType = SQLTokenizer.VARCHAR; |
| 684 | break; |
| 685 | case SQLTokenizer.COUNTER: |
| 686 | col.setAutoIncrement(true); |
| 687 | dataType = SQLTokenizer.INT; |
| 688 | break; |
| 689 | case SQLTokenizer.NUMERIC: |
| 690 | case SQLTokenizer.DECIMAL: |
| 691 | if(token.value == SQLTokenizer.PARENTHESIS_L){ |
| 692 | // read the precision of the data type |
| 693 | token = nextToken( MISSING_EXPRESSION ); |
| 694 | int value; |
| 695 | try{ |
| 696 | value = Integer.parseInt(token.getName(sql) ); |
| 697 | }catch(Exception e){ |
| 698 | throw createSyntaxError(token, MISSING_NUMBERVALUE ); |
| 699 | } |
| 700 | col.setPrecision(value); |
| 701 | token = nextToken( MISSING_COMMA_PARENTHESIS ); |
| 702 | if(token.value == SQLTokenizer.COMMA){ |
| 703 | // read the scale of the data type |
| 704 | token = nextToken( MISSING_EXPRESSION ); |
| 705 | try{ |
| 706 | value = Integer.parseInt(token.getName(sql) ); |
| 707 | }catch(Exception e){ |
| 708 | throw createSyntaxError(token, MISSING_NUMBERVALUE ); |
| 709 | } |
| 710 | col.setScale(value); |
| 711 | nextToken( MISSING_PARENTHESIS_R ); |
| 712 | } |
| 713 | token = nextToken(MISSING_OPTIONS_DATATYPE); |
| 714 | }else{ |
| 715 | col.setPrecision(18); //default Precision for decimal and numeric |
| 716 | } |
| 717 | break; |
| 718 | } |
| 719 | col.setDataType( dataType ); |
| 720 | this.previousToken(); |
| 721 | return col; |
| 722 | } |
| 723 | |
| 724 | private CommandCreateView createView() throws SQLException{ |
| 725 | SQLToken token = nextToken(MISSING_IDENTIFER ); |
| 726 | String viewName = token.getName(sql); |
| 727 | checkValidIdentifer( viewName, token ); |
| 728 | |
| 729 | nextToken(MISSING_AS); |
| 730 | token = nextToken(MISSING_SELECT); |
| 731 | CommandCreateView cmd = new CommandCreateView( con.log, viewName ); |
| 732 | |
| 733 | cmd.sql = new String(sql, token.offset, sql.length-token.offset ); |
| 734 | select(); //Parse to check for valid |
| 735 | return cmd; |
| 736 | } |
| 737 | |
| 738 | |
| 739 | private CommandCreateDatabase createIndex() throws SQLException{ |
| 740 | throw new java.lang.UnsupportedOperationException(); |
| 741 | } |
| 742 | |
| 743 | private CommandCreateDatabase createProcedure() throws SQLException{ |
| 744 | throw new java.lang.UnsupportedOperationException(); |
| 745 | } |
| 746 | |
| 747 | private Command drop() throws SQLException{ |
| 748 | SQLToken tokenType = nextToken(COMMANDS_CREATE); |
| 749 | |
| 750 | SQLToken token = nextToken( MISSING_EXPRESSION ); |
| 751 | String catalog = null; |
| 752 | String name = token.getName( sql ); |
| 753 | checkValidIdentifer( name, token ); |
| 754 | token = nextToken(); |
| 755 | //check if the object name include a database name |
| 756 | if(token != null && token.value == SQLTokenizer.POINT){ |
| 757 | token = nextToken(MISSING_EXPRESSION); |
| 758 | catalog = name; |
| 759 | name = token.getName( sql ); |
| 760 | checkValidIdentifer( name, token ); |
| 761 | token = nextToken(); |
| 762 | } |
| 763 | previousToken(); |
| 764 | |
| 765 | switch(tokenType.value){ |
| 766 | case SQLTokenizer.DATABASE: |
| 767 | case SQLTokenizer.TABLE: |
| 768 | case SQLTokenizer.VIEW: |
| 769 | case SQLTokenizer.INDEX: |
| 770 | case SQLTokenizer.PROCEDURE: |
| 771 | return new CommandDrop( con.log, catalog, name, tokenType.value); |
| 772 | default: |
| 773 | throw createSyntaxError( tokenType, COMMANDS_CREATE ); |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | |
| 778 | private Command alter() throws SQLException{ |
| 779 | throw new java.lang.UnsupportedOperationException(); |
| 780 | } |
| 781 | |
| 782 | |
| 783 | private CommandSet set() throws SQLException{ |
| 784 | SQLToken token = nextToken( COMMANDS_SET ); |
| 785 | switch(token.value){ |
| 786 | case SQLTokenizer.TRANSACTION: |
| 787 | return setTransaction(); |
| 788 | default: |
| 789 | throw new Error(); |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | private CommandSet setTransaction() throws SQLException{ |
| 794 | SQLToken token = nextToken( MISSING_ISOLATION ); |
| 795 | token = nextToken( MISSING_LEVEL ); |
| 796 | token = nextToken( COMMANDS_TRANS_LEVEL ); |
| 797 | CommandSet cmd = new CommandSet( con.log, SQLTokenizer.LEVEL ); |
| 798 | switch(token.value){ |
| 799 | case SQLTokenizer.READ: |
| 800 | token = nextToken( MISSING_COMM_UNCOMM ); |
| 801 | switch(token.value){ |
| 802 | case SQLTokenizer.COMMITTED: |
| 803 | cmd.isolationLevel = Connection.TRANSACTION_READ_COMMITTED; |
| 804 | break; |
| 805 | case SQLTokenizer.UNCOMMITTED: |
| 806 | cmd.isolationLevel = Connection.TRANSACTION_READ_UNCOMMITTED; |
| 807 | break; |
| 808 | default: |
| 809 | throw new Error(); |
| 810 | } |
| 811 | return cmd; |
| 812 | case SQLTokenizer.REPEATABLE: |
| 813 | token = nextToken( MISSING_READ ); |
| 814 | cmd.isolationLevel = Connection.TRANSACTION_REPEATABLE_READ; |
| 815 | return cmd; |
| 816 | case SQLTokenizer.SERIALIZABLE: |
| 817 | cmd.isolationLevel = Connection.TRANSACTION_SERIALIZABLE; |
| 818 | return cmd; |
| 819 | default: |
| 820 | throw new Error(); |
| 821 | } |
| 822 | |
| 823 | |
| 824 | } |
| 825 | |
| 826 | private Command execute() throws SQLException{ |
| 827 | throw new java.lang.UnsupportedOperationException(); |
| 828 | } |
| 829 | |
| 830 | /** |
| 831 | * Read a Expression list in parenthesis like of VALUES() or functions. |
| 832 | * The left parenthesis is already consumed. |
| 833 | * |
| 834 | * @param cmd is needed to add parameters "?" with addParameter() |
| 835 | * @see #expressionDefList |
| 836 | */ |
| 837 | private Expressions expressionParenthesisList(Command cmd) throws SQLException{ |
| 838 | Expressions list = new Expressions(); |
| 839 | { |
| 840 | SQLToken token = nextToken(); |
| 841 | if(token != null && token.value == SQLTokenizer.PARENTHESIS_R){ |
| 842 | // empty list like functions without params |
| 843 | return list; |
| 844 | } |
| 845 | previousToken(); |
| 846 | } |
| 847 | while(true){ |
| 848 | list.add( expression(cmd, 0) ); |
| 849 | SQLToken token = nextToken(MISSING_COMMA_PARENTHESIS); |
| 850 | switch(token.value){ |
| 851 | case SQLTokenizer.PARENTHESIS_R: |
| 852 | return list; |
| 853 | case SQLTokenizer.COMMA: |
| 854 | continue; |
| 855 | default: |
| 856 | throw new Error(); |
| 857 | } |
| 858 | } |
| 859 | } |
| 860 | |
| 861 | |
| 862 | /** |
| 863 | * Read a list of expressions. The list is limit from specific SQL keywords like SELECT, GROUP BY, ORDER BY |
| 864 | */ |
| 865 | private Expressions expressionTokenList(Command cmd, int listType) throws SQLException{ |
| 866 | Expressions list = new Expressions(); |
| 867 | while(true){ |
| 868 | Expression expr = expression(cmd, 0); |
| 869 | list.add( expr ); |
| 870 | SQLToken token = nextToken(); |
| 871 | |
| 872 | if(listType == SQLTokenizer.ORDER && token != null){ |
| 873 | switch(token.value){ |
| 874 | case SQLTokenizer.DESC: |
| 875 | expr.setAlias(SQLTokenizer.DESC_STR); |
| 876 | //kein break; |
| 877 | case SQLTokenizer.ASC: |
| 878 | token = nextToken(); |
| 879 | } |
| 880 | } |
| 881 | |
| 882 | if(token == null) { |
| 883 | previousToken(); |
| 884 | return list; |
| 885 | } |
| 886 | |
| 887 | switch(token.value){ |
| 888 | case SQLTokenizer.COMMA: |
| 889 | continue; |
| 890 | default: |
| 891 | if(isKeyword(token) ){ |
| 892 | previousToken(); |
| 893 | return list; |
| 894 | } |
| 895 | throw createSyntaxError( token, MISSING_TOKEN_LIST); |
| 896 | } |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | |
| 901 | private void expressionDefList(Command cmd, Expressions expressions, Strings columns) throws SQLException{ |
| 902 | SQLToken token = nextToken(); |
| 903 | if(token.value != SQLTokenizer.PARENTHESIS_L) throw createSyntaxError(token, MISSING_PARENTHESIS_L ); |
| 904 | Loop: |
| 905 | while(true){ |
| 906 | int offset = token.offset + token.length; |
| 907 | token = nextToken(); |
| 908 | if(token != null) offset = token.offset; |
| 909 | previousToken(); |
| 910 | |
| 911 | expressions.add( expression(cmd, 0) ); |
| 912 | SQLToken last = lastToken(); |
| 913 | int length = last.offset + last.length - offset; |
| 914 | columns.add( new String( sql, offset, length ) ); |
| 915 | |
| 916 | token = nextToken(MISSING_COMMA_PARENTHESIS); |
| 917 | switch(token.value){ |
| 918 | case SQLTokenizer.PARENTHESIS_R: |
| 919 | break Loop; |
| 920 | case SQLTokenizer.COMMA: |
| 921 | continue; |
| 922 | default: |
| 923 | throw new Error(); |
| 924 | } |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | |
| 929 | /** |
| 930 | * Read a complex expression that can be build from multiple atomic expressions. |
| 931 | * @param cmd is needed to add parameters "?" with addParameter() |
| 932 | * @param previousOperationLevel the level of the left operation. |
| 933 | */ |
| 934 | private Expression expression(Command cmd, int previousOperationLevel) throws SQLException{ |
| 935 | SQLToken token = nextToken(); |
| 936 | if(token == null) return null; |
| 937 | Expression leftExpr; |
| 938 | switch(token.value){ |
| 939 | case SQLTokenizer.NOT: |
| 940 | leftExpr = new ExpressionArithmetic( expression( cmd, ExpressionArithmetic.NOT / 10), ExpressionArithmetic.NOT); |
| 941 | break; |
| 942 | case SQLTokenizer.MINUS: |
| 943 | leftExpr = new ExpressionArithmetic( expression( cmd, ExpressionArithmetic.NEGATIVE / 10), ExpressionArithmetic.NEGATIVE); |
| 944 | break; |
| 945 | case SQLTokenizer.TILDE: |
| 946 | leftExpr = new ExpressionArithmetic( expression( cmd, ExpressionArithmetic.BIT_NOT / 10), ExpressionArithmetic.BIT_NOT); |
| 947 | break; |
| 948 | case SQLTokenizer.PARENTHESIS_L: |
| 949 | leftExpr = expression( cmd, 0); |
| 950 | token = nextToken(MISSING_PARENTHESIS_R); |
| 951 | break; |
| 952 | default: |
| 953 | leftExpr = expressionSingle( cmd, token); |
| 954 | } |
| 955 | boolean isNot = false; |
| 956 | while((token = nextToken()) != null){ |
| 957 | Expression rightExpr; |
| 958 | int operation = ExpressionArithmetic.getOperationFromToken(token.value); |
| 959 | int level = operation / 10; |
| 960 | if(previousOperationLevel >= level){ |
| 961 | previousToken(); |
| 962 | return leftExpr; |
| 963 | } |
| 964 | switch(token.value){ |
| 965 | case SQLTokenizer.PLUS: |
| 966 | case SQLTokenizer.MINUS: |
| 967 | case SQLTokenizer.ASTERISK: |
| 968 | case SQLTokenizer.SLACH: |
| 969 | case SQLTokenizer.PERCENT: |
| 970 | case SQLTokenizer.EQUALS: |
| 971 | case SQLTokenizer.LESSER: |
| 972 | case SQLTokenizer.LESSER_EQU: |
| 973 | case SQLTokenizer.GREATER: |
| 974 | case SQLTokenizer.GREATER_EQU: |
| 975 | case SQLTokenizer.UNEQUALS: |
| 976 | case SQLTokenizer.LIKE: |
| 977 | case SQLTokenizer.OR: |
| 978 | case SQLTokenizer.AND: |
| 979 | case SQLTokenizer.BIT_AND: |
| 980 | case SQLTokenizer.BIT_OR: |
| 981 | case SQLTokenizer.BIT_XOR: |
| 982 | rightExpr = expression( cmd, level ); |
| 983 | leftExpr = new ExpressionArithmetic( leftExpr, rightExpr, operation ); |
| 984 | break; |
| 985 | case SQLTokenizer.BETWEEN: |
| 986 | rightExpr = expression( cmd, ExpressionArithmetic.AND ); |
| 987 | nextToken( MISSING_AND ); |
| 988 | Expression rightExpr2 = expression( cmd, level ); |
| 989 | leftExpr = new ExpressionArithmetic( leftExpr, rightExpr, rightExpr2, operation ); |
| 990 | break; |
| 991 | case SQLTokenizer.IN: |
| 992 | nextToken(MISSING_PARENTHESIS_L); |
| 993 | token = nextToken(MISSING_EXPRESSION); |
| 994 | if(token.value == SQLTokenizer.SELECT){ |
| 995 | CommandSelect cmdSel = select(); |
| 996 | leftExpr = new ExpressionInSelect( con, leftExpr, cmdSel, operation ); |
| 997 | nextToken(MISSING_PARENTHESIS_R); |
| 998 | }else{ |
| 999 | previousToken(); |
| 1000 | Expressions list = expressionParenthesisList( cmd ); |
| 1001 | leftExpr = new ExpressionArithmetic( leftExpr, list, operation ); |
| 1002 | } |
| 1003 | break; |
| 1004 | case SQLTokenizer.IS: |
| 1005 | token = nextToken(MISSING_NOT_NULL); |
| 1006 | if(token.value == SQLTokenizer.NOT){ |
| 1007 | nextToken(MISSING_NULL); |
| 1008 | operation++; |
| 1009 | } |
| 1010 | leftExpr = new ExpressionArithmetic( leftExpr, operation ); |
| 1011 | break; |
| 1012 | case SQLTokenizer.NOT: |
| 1013 | token = nextToken(MISSING_BETWEEN_IN); |
| 1014 | previousToken(); |
| 1015 | isNot = true; |
| 1016 | continue; |
| 1017 | default: |
| 1018 | previousToken(); |
| 1019 | return leftExpr; |
| 1020 | } |
| 1021 | if(isNot){ |
| 1022 | isNot = false; |
| 1023 | leftExpr = new ExpressionArithmetic( leftExpr, ExpressionArithmetic.NOT); |
| 1024 | } |
| 1025 | } |
| 1026 | previousToken(); |
| 1027 | return leftExpr; |
| 1028 | } |
| 1029 | |
| 1030 | /** |
| 1031 | * parst einen einzelne Expression, wie 12, 'qwert', 0x3F oder column name |
| 1032 | * |
| 1033 | * @param cmd is needed to add parameters "?" with addParameter() |
| 1034 | */ |
| 1035 | private Expression expressionSingle(Command cmd, SQLToken token) throws SQLException{ |
| 1036 | boolean isMinus = false; |
| 1037 | if(token != null){ |
| 1038 | switch(token.value){ |
| 1039 | case SQLTokenizer.NULL: |
| 1040 | return new ExpressionValue( null, SQLTokenizer.NULL ); |
| 1041 | case SQLTokenizer.STRING: |
| 1042 | return new ExpressionValue( token.getName(null), SQLTokenizer.VARCHAR ); |
| 1043 | case SQLTokenizer.IDENTIFER: |
| 1044 | { |
| 1045 | String name = token.getName(null); |
| 1046 | checkValidIdentifer( name, token ); |
| 1047 | ExpressionName expr = new ExpressionName( name ); |
| 1048 | SQLToken token2 = nextToken(); |
| 1049 | if(token2 != null && token2.value == SQLTokenizer.POINT){ |
| 1050 | token = nextToken(MISSING_EXPRESSION); |
| 1051 | expr.setNameAfterTableAlias( token.getName( sql ) ); |
| 1052 | }else{ |
| 1053 | previousToken(); |
| 1054 | } |
| 1055 | return expr; |
| 1056 | } |
| 1057 | case SQLTokenizer.TRUE: |
| 1058 | return new ExpressionValue( Boolean.TRUE, SQLTokenizer.BOOLEAN ); |
| 1059 | case SQLTokenizer.FALSE: |
| 1060 | return new ExpressionValue( Boolean.FALSE, SQLTokenizer.BOOLEAN ); |
| 1061 | case SQLTokenizer.ESCAPE_L:{ |
| 1062 | token = nextToken(COMMANDS_ESCAPE); |
| 1063 | SQLToken para = nextToken(MISSING_EXPRESSION); |
| 1064 | Expression expr; |
| 1065 | switch(token.value){ |
| 1066 | case SQLTokenizer.D: // date escape sequence |
| 1067 | expr = new ExpressionValue( DateTime.valueOf(para.getName(sql), SQLTokenizer.DATE), SQLTokenizer.DATE ); |
| 1068 | break; |
| 1069 | case SQLTokenizer.T: // time escape sequnce |
| 1070 | expr = new ExpressionValue( DateTime.valueOf(para.getName(sql), SQLTokenizer.TIME), SQLTokenizer.TIME ); |
| 1071 | break; |
| 1072 | case SQLTokenizer.TS: // timestamp escape sequence |
| 1073 | expr = new ExpressionValue( DateTime.valueOf(para.getName(sql), SQLTokenizer.TIMESTAMP), SQLTokenizer.TIMESTAMP ); |
| 1074 | break; |
| 1075 | case SQLTokenizer.FN: // function escape sequence |
| 1076 | nextToken(MISSING_PARENTHESIS_L); |
| 1077 | expr = function(cmd, para, true); |
| 1078 | break; |
| 1079 | case SQLTokenizer.CALL: // call escape sequence |
| 1080 | throw new java.lang.UnsupportedOperationException("call escape sequence"); |
| 1081 | default: throw new Error(); |
| 1082 | } |
| 1083 | token = nextToken( ESCAPE_MISSING_CLOSE ); |
| 1084 | return expr; |
| 1085 | } |
| 1086 | case SQLTokenizer.QUESTION: |
| 1087 | ExpressionValue param = new ExpressionValue(); |
| 1088 | cmd.addParameter( param ); |
| 1089 | return param; |
| 1090 | case SQLTokenizer.CASE: |
| 1091 | return caseExpr(cmd); |
| 1092 | case SQLTokenizer.MINUS: |
| 1093 | case SQLTokenizer.PLUS: |
| 1094 | // Vorzeichenerkennung |
| 1095 | do{ |
| 1096 | if(token.value == SQLTokenizer.MINUS) |
| 1097 | isMinus = !isMinus; |
| 1098 | token = nextToken(); |
| 1099 | if(token == null) throw createSyntaxError( token, MISSING_EXPRESSION ); |
| 1100 | }while(token.value == SQLTokenizer.MINUS || token.value == SQLTokenizer.PLUS); |
| 1101 | // kein Break |
| 1102 | default: |
| 1103 | SQLToken token2 = nextToken(); |
| 1104 | if(token2 != null && token2.value == SQLTokenizer.PARENTHESIS_L){ |
| 1105 | if(isMinus) |
| 1106 | return new ExpressionArithmetic( function( cmd, token, false ), ExpressionArithmetic.NEGATIVE ); |
| 1107 | return function( cmd, token, false ); |
| 1108 | }else{ |
| 1109 | // Konstanter Ausdruck oder Identifer |
| 1110 | char chr1 = sql[ token.offset ]; |
| 1111 | if(chr1 == '$'){ |
| 1112 | previousToken(); |
| 1113 | String tok = new String(sql, token.offset+1, token.length-1); |
| 1114 | if(isMinus) tok = "-" + tok; |
| 1115 | return new ExpressionValue( new Money(Double.parseDouble(tok)), SQLTokenizer.MONEY ); |
| 1116 | } |
| 1117 | String tok = new String(sql, token.offset, token.length); |
| 1118 | if((chr1 >= '0' && '9' >= chr1) || chr1 == '.'){ |
| 1119 | previousToken(); |
| 1120 | //erstes Zeichen ein digit |
| 1121 | if(token.length>1 && (sql[ token.offset +1 ] | 0x20) == 'x'){ |
| 1122 | // binär Daten als Hex |
| 1123 | if(isMinus) throw createSyntaxError( token, "Invalid operator binary for data type varbinary."); |
| 1124 | return new ExpressionValue( Utils.hex2bytes( sql, token.offset+2, token.length-2), SQLTokenizer.BINARY ); |
| 1125 | } |
| 1126 | if(isMinus) tok = "-" + tok; |
| 1127 | if(Utils.indexOf( '.', sql, token.offset, token.length ) >= 0 || |
| 1128 | Utils.indexOf( 'e', sql, token.offset, token.length ) >= 0){ |
| 1129 | return new ExpressionValue( new Double(tok), SQLTokenizer.DOUBLE ); |
| 1130 | }else{ |
| 1131 | try{ |
| 1132 | return new ExpressionValue( new Integer(tok), SQLTokenizer.INT ); |
| 1133 | }catch(NumberFormatException e){ |
| 1134 | return new ExpressionValue( new Long(tok), SQLTokenizer.BIGINT ); |
| 1135 | } |
| 1136 | } |
| 1137 | }else{ |
| 1138 | // Bezeichner |
| 1139 | checkValidIdentifer( tok, token ); |
| 1140 | ExpressionName expr = new ExpressionName(tok); |
| 1141 | if(token2 != null && token2.value == SQLTokenizer.POINT){ |
| 1142 | token = nextToken(MISSING_EXPRESSION); |
| 1143 | expr.setNameAfterTableAlias( token.getName( sql ) ); |
| 1144 | }else{ |
| 1145 | previousToken(); |
| 1146 | } |
| 1147 | if(isMinus) |
| 1148 | return new ExpressionArithmetic( expr, ExpressionArithmetic.NEGATIVE ); |
| 1149 | return expr; |
| 1150 | } |
| 1151 | } |
| 1152 | } |
| 1153 | } |
| 1154 | return null; |
| 1155 | } |
| 1156 | |
| 1157 | |
| 1158 | ExpressionFunctionCase caseExpr(final Command cmd) throws SQLException{ |
| 1159 | ExpressionFunctionCase expr = new ExpressionFunctionCase(); |
| 1160 | SQLToken token = nextToken(MISSING_EXPRESSION); |
| 1161 | |
| 1162 | Expression input = null; |
| 1163 | if(token.value != SQLTokenizer.WHEN){ |
| 1164 | // simple CASE Syntax |
| 1165 | previousToken(); |
| 1166 | input = expression(cmd, 0); |
| 1167 | token = nextToken(MISSING_WHEN_ELSE_END); |
| 1168 | } |
| 1169 | |
| 1170 | while(true){ |
| 1171 | switch(token.value){ |
| 1172 | case SQLTokenizer.WHEN: |
| 1173 | Expression condition = expression(cmd, 0); |
| 1174 | if(input != null){ |
| 1175 | // simple CASE Syntax |
| 1176 | condition = new ExpressionArithmetic( input, condition, ExpressionArithmetic.EQUALS); |
| 1177 | } |
| 1178 | nextToken(MISSING_THEN); |
| 1179 | Expression result = expression(cmd, 0); |
| 1180 | expr.addCase(condition, result); |
| 1181 | break; |
| 1182 | case SQLTokenizer.ELSE: |
| 1183 | expr.setElseResult(expression(cmd, 0)); |
| 1184 | break; |
| 1185 | case SQLTokenizer.END: |
| 1186 | expr.setEnd(); |
| 1187 | return expr; |
| 1188 | default: |
| 1189 | throw new Error(); |
| 1190 | } |
| 1191 | token = nextToken(MISSING_WHEN_ELSE_END); |
| 1192 | } |
| 1193 | } |
| 1194 | |
| 1195 | |
| 1196 | /** |
| 1197 | * Parse any functions. The left parenthesis is allready consumed from token list. |
| 1198 | * @param token the SQLToken of the function |
| 1199 | * @param isEscape If the function is a FN ESCAPE sequence |
| 1200 | */ |
| 1201 | private Expression function( Command cmd, SQLToken token, boolean isEscape ) throws SQLException{ |
| 1202 | Expression expr; |
| 1203 | switch(token.value){ |
| 1204 | case SQLTokenizer.CONVERT:{ |
| 1205 | Column col; |
| 1206 | Expression style = null; |
| 1207 | if(isEscape){ |
| 1208 | expr = expression( cmd, 0); |
| 1209 | nextToken(MISSING_COMMA); |
| 1210 | col = datatype(isEscape); |
| 1211 | }else{ |
| 1212 | col = datatype(isEscape); |
| 1213 | nextToken(MISSING_COMMA); |
| 1214 | expr = expression( cmd, 0); |
| 1215 | token = nextToken(MISSING_COMMA_PARENTHESIS); |
| 1216 | if(token.value == SQLTokenizer.COMMA){ |
| 1217 | style = expression( cmd, 0);; |
| 1218 | }else |
| 1219 | previousToken(); |
| 1220 | } |
| 1221 | nextToken(MISSING_PARENTHESIS_R); |
| 1222 | return new ExpressionFunctionConvert( col, expr, style ); |
| 1223 | } |
| 1224 | case SQLTokenizer.CAST: |
| 1225 | expr = expression( cmd, 0); |
| 1226 | nextToken(MISSING_AS); |
| 1227 | Column col = datatype(false); |
| 1228 | nextToken(MISSING_PARENTHESIS_R); |
| 1229 | return new ExpressionFunctionConvert( col, expr, null ); |
| 1230 | case SQLTokenizer.TIMESTAMPDIFF: |
| 1231 | token = nextToken(MISSING_INTERVALS); |
| 1232 | nextToken(MISSING_COMMA); |
| 1233 | expr = expression( cmd, 0); |
| 1234 | nextToken(MISSING_COMMA); |
| 1235 | expr = new ExpressionFunctionTimestampDiff( token.value, expr, expression( cmd, 0)); |
| 1236 | nextToken(MISSING_PARENTHESIS_R); |
| 1237 | return expr; |
| 1238 | case SQLTokenizer.TIMESTAMPADD: |
| 1239 | token = nextToken(MISSING_INTERVALS); |
| 1240 | nextToken(MISSING_COMMA); |
| 1241 | expr = expression( cmd, 0); |
| 1242 | nextToken(MISSING_COMMA); |
| 1243 | expr = new ExpressionFunctionTimestampAdd( token.value, expr, expression( cmd, 0)); |
| 1244 | nextToken(MISSING_PARENTHESIS_R); |
| 1245 | return expr; |
| 1246 | } |
| 1247 | Expressions paramList = expressionParenthesisList(cmd); |
| 1248 | int paramCount = paramList.size(); |
| 1249 | Expression[] params = paramList.toArray(); |
| 1250 | boolean invalidParamCount; |
| 1251 | switch(token.value){ |
| 1252 | // numeric functions: |
| 1253 | case SQLTokenizer.ABS: |
| 1254 | invalidParamCount = (paramCount != 1); |
| 1255 | expr = new ExpressionFunctionAbs(); |
| 1256 | break; |
| 1257 | case SQLTokenizer.ACOS: |
| 1258 | invalidParamCount = (paramCount != 1); |
| 1259 | expr = new ExpressionFunctionACos(); |
| 1260 | break; |
| 1261 | case SQLTokenizer.ASIN: |
| 1262 | invalidParamCount = (paramCount != 1); |
| 1263 | expr = new ExpressionFunctionASin(); |
| 1264 | break; |
| 1265 | case SQLTokenizer.ATAN: |
| 1266 | invalidParamCount = (paramCount != 1); |
| 1267 | expr = new ExpressionFunctionATan(); |
| 1268 | break; |
| 1269 | case SQLTokenizer.ATAN2: |
| 1270 | invalidParamCount = (paramCount != |