src/sql/SelStatement.cxx

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Prabakaran Thirumalai   *
   3  *   praba_tuty@yahoo.com   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15   ***************************************************************************/
  16 #include <os.h>
  17 #include <Statement.h>
  18 #include <TableImpl.h>
  19 #include <OrderTableImpl.h>
  20
  21 SelStatement::SelStatement()
  22 {
  23     parsedData = NULL;
  24     dbMgr = NULL;
  25     table = NULL;
  26     params = NULL;
  27     paramValues = NULL;
  28     totalParams = 0;
  29     bindFields = NULL;
  30     bindFieldValues = NULL;
  31     totalFields = 0;
  32     isPointReturned = false;
  33     handleAggWithTbl=false;
  34     numRecords = 0;
  35     isOffsetReached = false;
  36     isRecLimitReached = false;
  37     isExplain=false;
  38     isJoin=false;
  39 }
  40
  41 SelStatement::~SelStatement()
  42 {
  43     close();
  44     if (table) { table->close(); table = NULL; }
  45     if (totalParams) {
  46         free(params);
  47         params =  NULL;
  48         free(paramValues);
  49         paramValues = NULL;
  50     }
  51     if (totalFields)
  52     {
  53         free(bindFields);
  54         bindFields =  NULL;
  55         free(bindFieldValues);
  56         bindFieldValues = NULL;
  57
  58     }
  59 }
  60 DbRetVal SelStatement::getParamFldInfo(int paramNo, FieldInfo *&info)
  61 {
  62     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
  63     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
  64     if (NULL == cValue)
  65     {
  66         printError(ErrSysFatal, "condition value is null. Should never happen");
  67         return ErrSysFatal;
  68     }
  69     table->getFieldNameAlone(cValue->fName,info->fldName);
  70     info->type = cValue->type;
  71     info->length = cValue->length;
  72     info->isNull = cValue->isNullable;
  73     return OK;
  74 }
  75 DbRetVal SelStatement::execute(int &rowsAffected)
  76 {
  77     DbRetVal rv = OK;
  78     //copy param values to binded buffer
  79     ConditionValue *value;
  80     for (int i = 0; i < totalParams; i ++)
  81     {
  82         value = (ConditionValue*) params[i];
  83         if (paramValues[i] == NULL)
  84         {
  85             continue;
  86             //printError(ErrBadCall, "param values not set");
  87             //return ErrBadCall;
  88         }
  89         AllDataType::copyVal(value->value, paramValues[i], value->type, value->length);
  90     }
  91     //table->printPlan(0);
  92     //printf("Execute Called\n");
  93     rv = table->execute();
  94     numRecords = 0;
  95     isOffsetReached = false;
  96     isRecLimitReached = false;
  97
  98     if (isExplain) table->printPlan(0);
  99     return rv;
 100 }
 101
 102 DbRetVal SelStatement::setParam(int paramNo, void *value)
 103 {
 104     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 105     if (NULL == value) return ErrBadArg;
 106     paramValues[paramNo -1] = (char*) value;
 107     return OK;
 108 }
 109
 110 DbRetVal SelStatement::setShortParam(int paramNo, short value)
 111 {
 112     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 113     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 114     if (NULL == cValue)
 115     {
 116         printError(ErrSysFatal, "field value is null. Should never happen");
 117         return ErrSysFatal;
 118     }
 119     *(short*)cValue->value = value;
 120     return OK;
 121 }
 122
 123 DbRetVal SelStatement::setIntParam(int paramNo, int value)
 124 {
 125     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 126     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 127     if (NULL == cValue)
 128     {
 129         printError(ErrSysFatal, "condition value is null. Should never happen");
 130         return ErrSysFatal;
 131     }
 132     *(int*)cValue->value = value;
 133     return OK;
 134 }
 135 DbRetVal SelStatement::setLongParam(int paramNo, long value)
 136 {
 137     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 138     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 139     if (NULL == cValue)
 140     {
 141         printError(ErrSysFatal, "condition value is null. Should never happen");
 142         return ErrSysFatal;
 143     }
 144     *(long*)cValue->value = value;
 145     return OK;
 146 }
 147
 148 DbRetVal SelStatement::setLongLongParam(int paramNo, long long value)
 149 {
 150     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 151     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 152     if (NULL == cValue)
 153     {
 154         printError(ErrSysFatal, "condition value is null. Should never happen");
 155         return ErrSysFatal;
 156     }
 157     *(long long*)cValue->value = value;
 158     return OK;
 159 }
 160 DbRetVal SelStatement::setByteIntParam(int paramNo, ByteInt value)
 161 {
 162     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 163     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 164     if (NULL == cValue)
 165     {
 166         printError(ErrSysFatal, "condition value is null. Should never happen");
 167         return ErrSysFatal;
 168     }
 169     *(ByteInt*)cValue->value = value;
 170     return OK;
 171 }
 172 DbRetVal SelStatement::setFloatParam(int paramNo, float value)
 173 {
 174     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 175     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 176     if (NULL == cValue)
 177     {
 178         printError(ErrSysFatal, "condition value is null. Should never happen");
 179         return ErrSysFatal;
 180     }
 181     *(float*)cValue->value = value;
 182     return OK;
 183 }
 184 DbRetVal SelStatement::setDoubleParam(int paramNo, double value)
 185 {
 186     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 187     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 188     if (NULL == cValue)
 189     {
 190         printError(ErrSysFatal, "condition value is null. Should never happen");
 191         return ErrSysFatal;
 192     }
 193     *(double*)cValue->value = value;
 194     return OK;
 195 }
 196 DbRetVal SelStatement::setStringParam(int paramNo, char *value)
 197 {
 198     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 199     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 200     if (NULL == cValue)
 201     {
 202         printError(ErrSysFatal, "condition value is null. Should never happen");
 203         return ErrSysFatal;
 204     }
 205     strcpy((char*)cValue->value, value);
 206     return OK;
 207 }
 208 DbRetVal SelStatement::setDateParam(int paramNo, Date value)
 209 {
 210     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 211     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 212     if (NULL == cValue)
 213     {
 214         printError(ErrSysFatal, "condition value is null. Should never happen");
 215         return ErrSysFatal;
 216     }
 217     *(Date*)cValue->value = value;
 218     return OK;
 219 }
 220 DbRetVal SelStatement::setTimeParam(int paramNo, Time value)
 221 {
 222     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 223     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 224     if (NULL == cValue)
 225     {
 226         printError(ErrSysFatal, "condition value is null. Should never happen");
 227         return ErrSysFatal;
 228     }
 229     *(Time*)cValue->value = value;
 230     return OK;
 231 }
 232 DbRetVal SelStatement::setTimeStampParam(int paramNo, TimeStamp value)
 233 {
 234     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 235     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 236     if (NULL == cValue)
 237     {
 238         printError(ErrSysFatal, "condition value is null. Should never happen");
 239         return ErrSysFatal;
 240     }
 241     *(TimeStamp*)cValue->value = value;
 242     return OK;
 243 }
 244
 245 DbRetVal SelStatement::setBinaryParam(int paramNo, void *value, int length)
 246 {
 247     if (paramNo <=0 || paramNo > totalParams) return ErrBadArg;
 248     ConditionValue *cValue = (ConditionValue*) params [paramNo-1];
 249     if (NULL == cValue)
 250     {
 251         printError(ErrSysFatal, "condition value is null. Should never happen");
 252         return ErrSysFatal;
 253     }
 254     AllDataType::convertToBinary(cValue->value,value,typeString,cValue->length);
 255     return OK;
 256 }
 257
 258 DbRetVal SelStatement::setBindField(int colNo, void *value)
 259 {
 260     if (colNo <=0) return ErrBadArg;
 261     //TODO: check the upper limit
 262     //if (colNo > table->getFieldNameList().size()) return ErrBadArg;
 263     if (NULL == value) return ErrBadArg;
 264     bindFieldValues[colNo -1] = (char*) value;
 265     return OK;
 266 }
 267 bool SelStatement::isTableAlreadyPresent(char *tblName, char *aliasName)
 268 {
 269     ListIterator titer = parsedData->getTableNameList().getIterator();
 270     int count =0;
 271     while (titer.hasElement())
 272     {
 273         TableName *t  = (TableName*)titer.nextElement();
 274         if (strcmp(t->tblName, tblName) ==0 &&
 275             strcmp(t->aliasName, aliasName) ==0) count++;
 276     }
 277     if (count == 1) return false;
 278     return true;
 279 }
 280 DbRetVal SelStatement::openTables()
 281 {
 282     if (dbMgr == NULL) return ErrNoConnection;
 283     JoinTableImpl *jHdl = NULL;
 284     Table *tHdl = NULL, *prevHdl = NULL;
 285     isJoin = false;
 286     //check whether all the table exists
 287     ListIterator titer = parsedData->getTableNameList().getIterator();
 288     ListIterator jiter = parsedData->getJoinTypeList().getIterator();
 289     while (titer.hasElement())
 290     {
 291         TableName *t  = (TableName*)titer.nextElement();
 292         parsedData->setTableName(t->tblName);
 293         if (isTableAlreadyPresent(t->tblName, t->aliasName)) {
 294             printError(ErrSyntaxError,
 295                        "Referencing same table again %s", t->tblName);
 296             if (prevHdl) delete prevHdl;
 297             return ErrSyntaxError;
 298         }
 299         tHdl = dbMgr->openTable(t->tblName);
 300         if ( NULL == tHdl )
 301         {
 302             printError(ErrNotExists,
 303                        "Unable to open the table:Table not exists");
 304             if (prevHdl) delete prevHdl;
 305             return ErrNotExists;
 306         }
 307         TableImpl *tImpl=  (TableImpl*) tHdl;
 308         tImpl->setAliasName(t->aliasName);
 309         if (NULL != prevHdl)
 310         {
 311             isJoin = true;
 312             jHdl = new JoinTableImpl();
 313             jHdl->setTable(prevHdl, tHdl);
 314             JoinTypeNode *node = (JoinTypeNode*) jiter.nextElement();
 315             if (node == NULL) {
 316                 printError(ErrSyntaxError,
 317                            "Join Type and number of tables do not match");
 318                 delete jHdl;
 319                 return ErrSyntaxError;
 320             }
 321             jHdl->setJoinType(node->jType);
 322             prevHdl = jHdl;
 323             continue;
 324         }
 325         prevHdl = tHdl;
 326     }
 327
 328     if (isJoin) table = jHdl; else table = tHdl;
 329     return OK;
 330 }
 331 DbRetVal SelStatement::resolve()
 332 {
 333     DbRetVal rv = openTables();
 334     if (rv != OK) return rv;
 335     //get the fieldname list and validate field names
 336     ListIterator iter = parsedData->getFieldNameList().getIterator();
 337     FieldName *name = NULL;
 338     FieldInfo *fInfo = new FieldInfo();
 339     List bindFldList;
 340     bool isMixPrjList = false;
 341     bool isAggFld = false;
 342     bool isNotAggFld = false;
 343     bool isSingleTableNoGrp = false;
 344     bool isGroupFld = false;
 345     if(parsedData->getTableNameList().size() == 1 &&
 346        parsedData->getGroupFieldNameList().size() == 0)
 347     {
 348         isSingleTableNoGrp = true;
 349     }
 350     AggTableImpl *aggTable = NULL;
 351     while (iter.hasElement())
 352     {
 353         name = (FieldName*)iter.nextElement();
 354         if (NULL == name)
 355         {
 356             dbMgr->closeTable(table);
 357             table = NULL;
 358             delete fInfo;
 359             printError(ErrSysFatal, "Should never happen. Field Name list has NULL");
 360             return ErrSysFatal;
 361         }
 362         bool isBindFld=false;
 363         if ('*' == name->fldName[0] && name->aType == AGG_UNKNOWN)
 364         {
 365             rv = resolveStar();
 366             if (rv != OK)
 367             {
 368                 dbMgr->closeTable(table);
 369                 table = NULL;
 370                 delete fInfo;
 371                 return rv;
 372             }
 373             if (parsedData->getGroupFieldNameList().size()!= 0
 374                             && !isSingleTableNoGrp)
 375             {
 376                 if (!aggTable)
 377                     aggTable = new AggTableImpl();
 378                 aggTable->setTable(table);
 379             }
 380             //as soon as it encounters *, it breaks the loop negleting other field names
 381             //as they all are deleted during resolveStar method.
 382             break;
 383         } else {
 384             if ('*' == name->fldName[0] && name->aType != AGG_COUNT) {
 385                 return ErrSyntaxError;
 386             }
 387             rv = table->getFieldInfo(name->fldName, fInfo);
 388             if (ErrNotFound == rv || ErrNotExists == rv)
 389             {
 390                 if (aggTable) { delete aggTable; aggTable = NULL; }
 391                 else dbMgr->closeTable(table);
 392                 table = NULL;
 393                 delete fInfo;
 394                 printError(ErrSyntaxError, "Field %s does not exist in table",
 395                                         name->fldName);
 396                 return ErrSyntaxError;
 397             }
 398             FieldValue *newVal = new FieldValue();
 399             strcpy(newVal->fldName,name->fldName);
 400             newVal->parsedString = NULL;
 401             newVal->paramNo = 0;
 402             newVal->aType = name->aType;
 403             if (!isMixPrjList) {
 404                 if (newVal->aType != AGG_UNKNOWN) isAggFld = true;
 405                 else isNotAggFld = true;
 406                 if (isAggFld && isNotAggFld) isMixPrjList = true;
 407             }
 408             newVal->isInResSet = true;
 409             newVal->offset = fInfo->offset;
 410             newVal->isPrimary = fInfo->isPrimary;
 411             newVal->isUnique = fInfo->isUnique;
 412             newVal->isAutoIncrement = fInfo->isAutoIncrement;
 413             newVal->isDefault = fInfo->isDefault;
 414             if (newVal->isDefault)
 415                 strcpy(newVal->defValBuf, fInfo->defaultValueBuf);
 416             else newVal->defValBuf[0]='\0';
 417
 418             if (name->aType == AGG_COUNT) {
 419                 newVal->type = typeInt;
 420                 newVal->length = sizeof(int);
 421             }
 422             else if (name->aType == AGG_AVG) {
 423                 newVal->type = typeDouble;
 424                 newVal->length = sizeof(double);
 425                 if (!AllDataType::isValidFieldForAvg(fInfo->type)) {
 426                     printError(ErrBadArg, "Illegal operation for field %s",
 427                                                                fInfo->fldName);
 428                     dbMgr->closeTable(table);
 429                     if (aggTable) { delete aggTable; aggTable = NULL; }
 430                     table = NULL;
 431                     delete fInfo;
 432                     return ErrBadArg;
 433                 }
 434             }
 435             else {
 436                 newVal->type = fInfo->type;
 437                 newVal->length = fInfo->length;
 438             }
 439             newVal->isNullable = fInfo->isNull;
 440             FieldName *bFldName=NULL;
 441             ListIterator it = bindFldList.getIterator();
 442             while (it.hasElement())
 443             {
 444                 bFldName = (FieldName*)it.nextElement();
 445                 if(0==strcmp(bFldName->fldName,name->fldName) &&
 446                              name->aType == AGG_UNKNOWN)
 447                 {
 448                     newVal->value=table->getBindFldAddr(name->fldName);
 449                     newVal->isAllocVal=false;
 450                     isBindFld=true;
 451                     break;
 452                 }
 453             }
 454             if (!isBindFld) {
 455                 if ( name->aType == AGG_UNKNOWN ||
 456                                     (name->aType != AGG_COUNT &&
 457                                                    name->aType != AGG_AVG) ) {
 458                     if(newVal->type == typeBinary)
 459                         newVal->value = AllDataType::alloc(fInfo->type,
 460                                                            2 * fInfo->length);
 461                     else newVal->value = AllDataType::alloc(fInfo->type,
 462                                                             fInfo->length);
 463                 } else {
 464                     if (name->aType == AGG_AVG) {
 465                         newVal->value = AllDataType::alloc(typeDouble,
 466                                                             sizeof(double));
 467                         memset(newVal->value, 0, sizeof(double));
 468                     }
 469                     else if (name->aType == AGG_COUNT) {
 470                         newVal->value = AllDataType::alloc(typeInt,
 471                                                                sizeof(int));
 472                         memset(newVal->value, 0, sizeof(int));
 473                     }
 474
 475                 }
 476                 newVal->isAllocVal=true;
 477             }
 478             if (name->aType ==AGG_UNKNOWN &&
 479                             parsedData->getGroupFieldNameList().size()== 0) {
 480                 rv = table->bindFld(name->fldName, newVal->value);
 481                 if (OK !=rv) {
 482                    if (newVal->isAllocVal) free(newVal->value);
 483                    delete newVal;
 484                    delete fInfo;
 485                    return rv;
 486                }
 487             }
 488             else if (!isSingleTableNoGrp)
 489             {
 490                 if (!aggTable) {
 491                     aggTable = new AggTableImpl();
 492                     aggTable->setTable(table);
 493                 }
 494                 rv = aggTable->bindFld(name->fldName, name->aType, newVal->value);
 495                 if (OK !=rv) {
 496                     if (newVal->isAllocVal) free(newVal->value);
 497                     delete newVal; delete fInfo; delete aggTable;
 498                     aggTable = NULL; table = NULL;
 499                     return rv;
 500                 }
 501             }
 502             if (name->aType !=AGG_UNKNOWN && isSingleTableNoGrp)
 503                 handleAggWithTbl= true;
 504             parsedData->insertFieldValue(newVal);
 505         }
 506         if (!isBindFld) bindFldList.append(name);
 507     }
 508     bindFldList.reset();
 509
 510     //Check if the having list is present in projection list or not.
 511     //If not present bind here not to be printed in fetchAndPrint later.
 512     ListIterator hiter = parsedData->getHavingFieldNameList().getIterator();
 513     while (hiter.hasElement()) {
 514         FieldName *fnm = (FieldName *) hiter.nextElement();
 515         rv = table->getFieldInfo(fnm->fldName, fInfo);
 516         if (!isInProjectionList(fnm->fldName, fnm->aType)) {
 517             FieldValue *newVal = new FieldValue();
 518             strcpy(newVal->fldName,fnm->fldName);
 519             newVal->parsedString = NULL;
 520             newVal->paramNo = 0;
 521             newVal->aType = fnm->aType;
 522             newVal->isInResSet = false;
 523             newVal->isNullable = fInfo->isNull;
 524             newVal->offset = fInfo->offset;
 525             newVal->isPrimary = fInfo->isPrimary;
 526             newVal->isUnique = fInfo->isUnique;
 527             newVal->isAutoIncrement = fInfo->isAutoIncrement;
 528             if (fnm->aType == AGG_AVG) {
 529                 newVal->value = AllDataType::alloc(typeDouble, sizeof(double));
 530                 memset(newVal->value, 0, sizeof(double));
 531             } else if (fnm->aType == AGG_COUNT) {
 532                 newVal->value = AllDataType::alloc(typeInt, sizeof(int));
 533                 memset(newVal->value, 0, sizeof(int));
 534             } else {
 535                 newVal->value = AllDataType::alloc(fInfo->type, fInfo->length);
 536                 memset(newVal->value, 0, fInfo->length);
 537             }
 538             newVal->isAllocVal = true;
 539             parsedData->insertFieldValue(newVal);
 540             aggTable->bindFld(fnm->fldName, fnm->aType, newVal->value);
 541         }
 542     }
 543
 544     rv = setBindFieldAndValues();
 545     if (rv != OK)
 546     {
 547         delete fInfo;
 548         if (aggTable) { delete aggTable; aggTable = NULL; }
 549         else dbMgr->closeTable(table);
 550         table = NULL;
 551         return rv;
 552     }
 553
 554     table->setCondition(parsedData->getCondition());
 555
 556     rv = resolveForCondition();
 557     if (rv != OK)
 558     {
 559         delete fInfo;
 560         //TODO::free memory allocated for params
 561         if (aggTable) { delete aggTable; aggTable = NULL; }
 562         else {
 563             table->setCondition(NULL);
 564             dbMgr->closeTable(table);
 565         }
 566         table = NULL;
 567         return rv;
 568     }
 569     if (NULL == parsedData->getCondition()) parsedData->setCacheWorthy(false);
 570     rv = resolveGroupFld(aggTable, isGroupFld);
 571     if (rv != OK)
 572     {
 573         delete fInfo;
 574         //TODO::free memory allocated for params
 575         if (aggTable) { delete aggTable; aggTable = NULL; }
 576         else if (table)
 577         {
 578             table->setCondition(NULL);
 579             dbMgr->closeTable(table);
 580         }
 581         table = NULL;
 582         return rv;
 583     }
 584     if (isMixPrjList && ! isGroupFld) {
 585         printError(ErrSyntax, "Group By Field required.");
 586         delete fInfo;
 587         if (aggTable) { delete aggTable; aggTable = NULL; }
 588         else if (table)
 589         {
 590             table->setCondition(NULL);
 591             dbMgr->closeTable(table);
 592         }
 593         table = NULL;
 594         return ErrSyntax;
 595     }
 596
 597     rv = resolveOrderByFld();
 598     if (rv != OK)
 599     {
 600         delete fInfo;
 601         delete table;
 602         table = NULL;
 603         return rv;
 604     }
 605     rv = resolveDistinct();
 606     delete fInfo;
 607     if(parsedData->getExplain())  isExplain = true;
 608     else
 609         isExplain= false;
 610     return rv;
 611 }
 612 DbRetVal SelStatement::resolveDistinct()
 613 {
 614     if (!parsedData->getDistinct()) {
 615          return OK;
 616     }
 617     OrderTableImpl *orderTable = new OrderTableImpl();
 618     orderTable->setTable(table);
 619     orderTable->setProjList(parsedData->getFieldValueList());
 620     orderTable->setOrderByList(parsedData->getFieldValueList());
 621     orderTable->setDistinct();
 622     table = orderTable;
 623     handleAggWithTbl= false;
 624     return OK;
 625 }
 626
 627
 628 DbRetVal SelStatement::resolveOrderByFld()
 629 {
 630     if (0 == parsedData->getOrderFieldNameList().size()) {
 631          return OK;
 632     }
 633     OrderTableImpl *orderTable = new OrderTableImpl();
 634     orderTable->setTable(table);
 635     orderTable->setProjList(parsedData->getFieldValueList());
 636     ListIterator giter = parsedData->getOrderFieldNameList().getIterator();
 637     FieldName *name = NULL;
 638     DbRetVal rv = OK;
 639     FieldInfo *fInfo = new FieldInfo();
 640     while (giter.hasElement())
 641     {
 642         name = (FieldName*)giter.nextElement();
 643         rv = table->getFieldInfo(name->fldName, fInfo);
 644         if (ErrNotFound == rv || ErrNotExists == rv)
 645         {
 646             delete fInfo;
 647             printError(ErrSyntaxError, "Field %s does not exist in table",
 648                                         name->fldName);
 649             return ErrSyntaxError;
 650         }
 651         /*FieldValue *newVal = new FieldValue();
 652         strcpy(newVal->fldName,name->fldName);
 653         newVal->parsedString = NULL;
 654         newVal->paramNo = 0;
 655         newVal->type = fInfo->type;
 656         newVal->isNullable = fInfo->isNull;
 657         newVal->length = fInfo->length;
 658         if (newVal->type == typeBinary)
 659             newVal->value = AllDataType::alloc(fInfo->type, 2 * fInfo->length);
 660         else newVal->value = AllDataType::alloc(fInfo->type, fInfo->length);
 661         newVal->isAllocVal=true;
 662         parsedData->insertFieldValue(newVal);
 663         */
 664         if (name->aType == AGG_UNKNOWN) orderTable->setOrderBy(name->fldName);
 665         else orderTable->setOrderBy(name->fldName, true); //descending
 666     }
 667     delete fInfo;
 668     table = orderTable;
 669     handleAggWithTbl= false;
 670     return OK;
 671 }
 672
 673 DbRetVal SelStatement::resolveGroupFld(AggTableImpl *aggTable, bool &isGrpFld)
 674 {
 675     if (!aggTable) return OK;
 676
 677     //check whether all non aggregate projections are from group list
 678     ListIterator iter = parsedData->getFieldNameList().getIterator();
 679     ListIterator giter = parsedData->getGroupFieldNameList().getIterator();
 680     FieldName *name = NULL;
 681     while (iter.hasElement())
 682     {
 683         name = (FieldName*) iter.nextElement();
 684         if (name->aType == AGG_UNKNOWN && !isGroupFld(name->fldName) ) {
 685             printError(ErrSyntaxError,
 686                  "Non aggregate projection contains non group field: %s",
 687                                                                 name->fldName);
 688             return ErrSyntaxError;
 689         }
 690     }
 691
 692     DbRetVal rv = OK;
 693     FieldInfo *fInfo = new FieldInfo();
 694     while (giter.hasElement())
 695     {
 696         name = (FieldName*)giter.nextElement();
 697         rv = table->getFieldInfo(name->fldName, fInfo);
 698         if (ErrNotFound == rv || ErrNotExists == rv)
 699         {
 700             delete fInfo;
 701             printError(ErrSyntaxError, "Field %s does not exist in table",
 702                                                                 name->fldName);
 703             return ErrSyntaxError;
 704         }
 705         FieldValue *newVal = new FieldValue();
 706         strcpy(newVal->fldName,name->fldName);
 707         newVal->parsedString = NULL;
 708         newVal->paramNo = 0;
 709         newVal->type = fInfo->type;
 710         newVal->isNullable = fInfo->isNull;
 711         newVal->length = fInfo->length;
 712         newVal->offset = fInfo->offset;
 713         newVal->isPrimary = fInfo->isPrimary;
 714         newVal->isUnique = fInfo->isUnique;
 715         newVal->isAutoIncrement = fInfo->isAutoIncrement;
 716         if (newVal->type == typeBinary)
 717             newVal->value = AllDataType::alloc(fInfo->type, 2 * fInfo->length);
 718         else newVal->value = AllDataType::alloc(fInfo->type, fInfo->length);
 719         newVal->isAllocVal=true;
 720         parsedData->insertFieldValue(newVal);
 721         aggTable->setGroup(name->fldName, newVal->value);
 722     }
 723     delete fInfo;
 724     aggTable->setCondition(parsedData->getHavingCondition());
 725     /*if (giter.hasElement())
 726     {
 727        printError(ErrSyntaxError, "Only one field allowed in group\n");
 728        return ErrSyntaxError;
 729     }*/
 730     table = aggTable;
 731     isGrpFld = true;
 732     return OK;
 733 }
 734
 735 DbRetVal SelStatement::resolveStar()
 736 {
 737     DbRetVal rv = OK;
 738     parsedData->clearFieldNameList();
 739     FieldValue *newVal = NULL;
 740     List fNameList = table->getFieldNameList();
 741     ListIterator fNameIter = fNameList.getIterator();
 742     //fNameList.resetIter(); //do not remove this.
 743     FieldInfo *fInfo = new FieldInfo();
 744     for (int i = 0; i < fNameList.size() ; i++)
 745     {
 746         char *fName = ((Identifier*)(fNameIter.nextElement()))->name;
 747         rv = table->getFieldInfo(fName, fInfo);
 748         if (ErrNotFound == rv || ErrNotExists == rv)
 749         {
 750             delete fInfo;
 751             fNameList.reset();
 752             printError(ErrSysFatal, "Should never happen.");
 753             return ErrSysFatal;
 754         }
 755         newVal = new FieldValue();
 756         strcpy(newVal->fldName,fName);
 757         newVal->parsedString = NULL;
 758         newVal->paramNo = 0;
 759         newVal->type = fInfo->type;
 760         newVal->length = fInfo->length;
 761         newVal->offset = fInfo->offset;
 762         newVal->isPrimary = fInfo->isPrimary;
 763         newVal->isUnique = fInfo->isUnique;
 764         newVal->isAutoIncrement = fInfo->isAutoIncrement;
 765
 766         // for binary datatype input buffer size should be 2 times the length
 767         if(newVal->type == typeBinary)
 768             newVal->value = AllDataType::alloc(fInfo->type, 2 * fInfo->length);
 769         else newVal->value = AllDataType::alloc(fInfo->type, fInfo->length);
 770         newVal->isAllocVal=true;
 771         newVal->isInResSet = true;
 772         parsedData->insertFieldValue(newVal);
 773         parsedData->insertField(fName);
 774         rv = table->bindFld(fName, newVal->value);
 775         if (rv != OK) {
 776             delete fInfo;
 777             return rv;
 778         }
 779     }
 780     fNameIter.reset();
 781     while (fNameIter.hasElement())
 782         delete (Identifier *) fNameIter.nextElement();
 783     fNameList.reset();
 784     delete fInfo;
 785     return OK;
 786 }
 787
 788 DbRetVal SelStatement::setBindFieldAndValues()
 789 {
 790     totalFields = parsedData->getFieldNameList().size();
 791     bindFields = (FieldValue**) malloc ( totalFields * sizeof(FieldValue*));
 792     bindFieldValues = (char**) malloc( totalFields * sizeof(char*));
 793     memset(bindFields, 0, totalFields * sizeof(FieldValue*));
 794     memset(bindFieldValues, 0, totalFields * sizeof(char*));
 795     ListIterator valIter = parsedData->getFieldValueList().getIterator();
 796     int colNo =0;
 797     FieldValue *value = NULL;
 798     //The second condition colNo < totalFields is important for projection list
 799     //might not contain the binded having field.
 800     while(valIter.hasElement() && colNo < totalFields)
 801     {
 802         value = (FieldValue*) valIter.nextElement();
 803         if (value == NULL)
 804         {
 805             free(bindFields); bindFields = NULL;
 806             free(bindFieldValues); bindFieldValues = NULL;
 807             printError(ErrSysFatal, "Should never happen. value NULL after iteration");
 808             return ErrSysFatal;
 809         }
 810         bindFields[colNo++] = value;
 811     }
 812     return OK;
 813 }
 814
 815
 816 DbRetVal SelStatement::resolveForCondition()
 817 {
 818     //get the fieldname list and validate field names
 819     ListIterator iter = parsedData->getConditionValueList().getIterator();
 820
 821     ConditionValue *value;
 822     FieldInfo *fInfo = new FieldInfo();
 823     int paramPos =1;
 824     DbRetVal rv = OK;
 825     while (iter.hasElement())
 826     {
 827         value = (ConditionValue*) iter.nextElement();
 828         if (NULL == value)
 829         {
 830             delete fInfo;
 831             printError(ErrSysFatal, "Should never happen.");
 832             return ErrSysFatal;
 833         }
 834         if(!value->isFunctionInvolve){
 835             rv = table->getFieldInfo(value->fName, fInfo);
 836             if (ErrNotFound == rv || ErrNotExists == rv)
 837             {
 838                 delete fInfo;
 839                 printError(ErrSyntaxError, "Field %s does not exist in table",
 840                                         value->fName);
 841                 return ErrSyntaxError;
 842             }
 843             if (value->aType == AGG_AVG) {
 844                 value->type = typeDouble;
 845                 value->length = sizeof(double);
 846             } else if (value->aType == AGG_COUNT) {
 847                 value->type = typeInt;
 848                 value->length = sizeof(int);
 849             } else {
 850                 value->type = fInfo->type;
 851                 value->length = fInfo->length;
 852             }
 853             value->isNullable = fInfo->isNull;
 854         }else{
 855              value->type = AllDataType::getCsqlTypeFromFunctionTypeForComparision(parsedData->getFunctionType());
 856         }
 857         value->value = AllDataType::alloc(value->type, value->length);
 858         //table->bindFld(name->fldName, value->value);
 859         if(value->paramNo ==1) continue;//For Predecate t1.f1=t2.f1
 860         if (value->parsedString == NULL)
 861         {
 862             delete fInfo;
 863             printError(ErrSyntaxError, "Condition value should not be NULL");
 864             return ErrSyntaxError;
 865         }
 866         if (value->parsedString[0] == '?')
 867         {
 868                 value->paramNo = paramPos++;
 869         }
 870         if (!value->paramNo) {
 871                 // for valid Integer
 872             if (value->type  == typeDate || value->type == typeTime ||
 873                 value->type == typeTimeStamp)
 874                 parsedData->setCacheWorthy(false);
 875                 if((value->type == typeInt) || (value->type==typeShort) ||
 876                 (value->type==typeByteInt) || (value->type==typeLongLong) ||
 877                                                      (value->type==typeLong)) {
 878                     int len=strlen(value->parsedString);
 879                     for(int n=0;n<len;n++){
 880                         int p=value->parsedString[n];
 881                         if(!(p>=48 && p<=57 || p==45)) return ErrBadArg;
 882                     }
 883                 }
 884
 885                 // Here for binary dataType it is not strcpy'd bcos internally memcmp is done for predicates like f2 = 'abcd' where f2 is binary
 886             AllDataType::strToValue(value->value, value->parsedString, value->type, value->length);
 887             }
 888     }
 889     delete fInfo;
 890     totalParams = paramPos -1;
 891     if (0 == totalParams) return OK;
 892     params = (void**) malloc ( totalParams * sizeof(FieldValue*));
 893     paramValues = (char**) malloc( totalParams * sizeof(char*));
 894     memset(params, 0, totalParams * sizeof(FieldValue*));
 895     memset(paramValues, 0, totalParams * sizeof(char*));
 896     iter.reset();
 897     while(iter.hasElement())
 898     {
 899         value = (ConditionValue*) iter.nextElement();
 900         if (value == NULL)
 901         {
 902             free(params); params = NULL;
 903             free(paramValues); paramValues = NULL;
 904             printError(ErrSysFatal, "Should never happen. value NULL after iteration");
 905             return ErrSysFatal;
 906         }
 907         if (value->paramNo) params[value->paramNo - 1] = value;
 908     }
 909     return OK;
 910 }
 911 bool SelStatement::isGroupFld(char *fieldName)
 912 {
 913     ListIterator giter = parsedData->getGroupFieldNameList().getIterator();
 914     FieldName *name = NULL;
 915     while (giter.hasElement())
 916     {
 917         name = (FieldName*) giter.nextElement();
 918         if (0 == strcmp(name->fldName, fieldName)) return true;
 919     }
 920     return false;
 921 }
 922
 923 void* SelStatement::handleSingleTableAggWithoutGroup()
 924 {
 925     if (isPointReturned) return NULL;
 926     TableImpl *tblImpl = (TableImpl*)table;
 927     ListIterator iter = parsedData->getFieldNameList().getIterator();
 928     int i=0;
 929     DbRetVal rv = OK;
 930     FieldName *name;
 931     FieldValue *fVal = NULL;
 932     bool noRec = false;
 933     while (iter.hasElement())
 934     {
 935         name = (FieldName*) iter.nextElement();
 936         fVal = bindFields[i];
 937
 938         rv = tblImpl->fetchAgg(name->fldName, name->aType, fVal->value, noRec);
 939         if (OK != rv) return NULL;
 940         i++;
 941         tblImpl->closeScan();
 942         tblImpl->execute();
 943     }
 944     isPointReturned = true;
 945     if(noRec && name->aType != AGG_COUNT) return NULL;
 946     return fVal;
 947 }
 948 void* SelStatement::fetch()
 949 {
 950     void *tuple = NULL;
 951     if(handleAggWithTbl)
 952     {
 953        tuple = handleSingleTableAggWithoutGroup();
 954        if (NULL == tuple) return NULL;
 955     }else {
 956         if (isOffsetReached) {
 957             if (!isRecLimitReached) {
 958                 tuple = table->fetch();
 959                 if (NULL != tuple) numRecords++;
 960                 if (numRecords == parsedData->getLimit()) isRecLimitReached=true;
 961             }
 962         }
 963         else {
 964           int recordOffset =0;
 965           while(recordOffset <= parsedData->getOffset()) {
 966             tuple = table->fetch();
 967             if (NULL == tuple) break;
 968             recordOffset++;
 969           }
 970           isOffsetReached = true;
 971           if (NULL != tuple) numRecords++;
 972           if (numRecords == parsedData->getLimit()) isRecLimitReached=true;
 973         }
 974     }
 975     if (NULL == tuple) return NULL;
 976
 977     //copy values to binded buffer
 978     FieldValue *value;
 979     for (int i = 0; i < totalFields; i++)
 980     {
 981         value = bindFields[i];
 982         if (bindFieldValues[i] == NULL)
 983         {
 984             printError(ErrBadCall, "Fields are not binded properly. Should never happen");
 985             return NULL;
 986         }
 987         AllDataType::copyVal(bindFieldValues[i], value->value, value->type, value->length);
 988     }
 989     return tuple;
 990 }
 991
 992 void* SelStatement::fetch(DbRetVal &rv)
 993 {
 994     void *tuple = NULL;
 995     if(handleAggWithTbl)
 996     {
 997         tuple = handleSingleTableAggWithoutGroup();
 998         if (NULL == tuple) return NULL;
 999     }else {
1000         if (isOffsetReached) {
1001             if (!isRecLimitReached) {
1002                 tuple = table->fetch(rv);
1003                 if (NULL != tuple) numRecords++;
1004                 if (numRecords == parsedData->getLimit()) isRecLimitReached=true;
1005             }
1006         } else {
1007             int recordOffset =0;
1008             while(recordOffset <= parsedData->getOffset()) {
1009                 tuple = table->fetch(rv);
1010                 if (NULL == tuple) break;
1011                 recordOffset++;
1012             }
1013             isOffsetReached = true;
1014             if (NULL != tuple) numRecords++;
1015             if (numRecords == parsedData->getLimit()) isRecLimitReached=true;
1016         }
1017     }
1018     if (NULL == tuple) return NULL;
1019     //copy values to binded buffer
1020     FieldValue *value;
1021     for (int i = 0; i < totalFields; i++)
1022     {
1023         value = bindFields[i];
1024         if (bindFieldValues[i] == NULL)
1025         {
1026             printError(ErrBadCall, "Fields are not binded properly. Should never happen %d", i);
1027             return NULL;
1028         }
1029                 AllDataType::copyVal(bindFieldValues[i], value->value, value->type, value->length);
1030     }
1031     return tuple;
1032 }
1033
1034 DbRetVal SelStatement::close()
1035 {
1036     isPointReturned = false;
1037     isExplain = false;
1038     if (table) return table->closeScan();
1039     else return OK;
1040 }
1041
1042 void* SelStatement::getParamValuePtr( int pos )
1043 {
1044     ConditionValue *p = (ConditionValue*) params [pos-1];
1045     return ( (void*) p->value );
1046 }
1047
1048 char* SelStatement::getFieldName ( int pos )
1049 {
1050     //TODO::if not yet prepared return error
1051     //TODO::check the upper limit for projpos
1052     ListIterator iter = parsedData->getFieldNameList().getIterator();
1053     int position = 1;
1054     while (iter.hasElement())
1055     {
1056         FieldName *name = (FieldName*) iter.nextElement();
1057         if (position == pos) {
1058               if (NULL == name)
1059               {
1060                   printError(ErrSysFatal, "Should never happen. Field Name list has NULL");
1061                   return (char*) 0;
1062               }
1063               return name->fldName;
1064         }
1065         position++;
1066     }
1067     return (char*) 0;
1068 }
1069
1070 DataType SelStatement::getFieldType( int pos )
1071 {
1072     FieldValue *v = bindFields[pos];
1073     return ( (DataType) v->type );
1074 }
1075
1076 int SelStatement::getFieldLength( int pos )
1077 {
1078     FieldValue *v = bindFields[pos];
1079     return ( (int) v->type );
1080 }
1081
1082 void* SelStatement::fetchAndPrint(bool SQL)
1083 {
1084     void *tuple = NULL;
1085     if(handleAggWithTbl)
1086     {
1087        tuple = handleSingleTableAggWithoutGroup();
1088     }else {
1089         if (isOffsetReached) {
1090             if (!isRecLimitReached) {
1091                 tuple = table->fetch();
1092                 if (NULL != tuple) numRecords++;
1093                 if (numRecords == parsedData->getLimit()) isRecLimitReached=true;
1094             }
1095         }
1096         else {
1097           int recordOffset =0;
1098           while(recordOffset <= parsedData->getOffset()) {
1099             tuple = table->fetch();
1100             if (NULL == tuple) break;
1101             recordOffset++;
1102           }
1103           isOffsetReached = true;
1104           if (NULL != tuple) numRecords++;
1105           if (numRecords == parsedData->getLimit()) isRecLimitReached=true;
1106         }
1107     }
1108     if (NULL == tuple) return NULL;
1109     FieldValue *value;
1110     bool nullValueSet;
1111     char stmt[128];
1112     if (SQL) {
1113         sprintf(stmt, "INSERT INTO %s VALUES(", table->getName());
1114         printf("%s", stmt);
1115     }
1116     for (int i = 0; i < totalFields; i++)
1117     {
1118         value = bindFields[i];
1119         if (!value->isInResSet) continue;
1120         nullValueSet = table->isFldNull(value->fldName);
1121         if (nullValueSet) {
1122             if (SQL) {
1123                 if (i==0)
1124                     printf("NULL");
1125                 else
1126                     printf(", NULL");
1127             }
1128             else if (value->aType != AGG_COUNT) printf("NULL\t");
1129             else printf("0\t");
1130         }
1131         else  {
1132             if (SQL) {
1133                 switch(value->type)
1134                 {
1135                     case typeString:
1136                     case typeVarchar:
1137                     case typeBinary:
1138                     case typeDate:
1139                     case typeTime:
1140                     case typeTimeStamp:
1141                     {
1142                         if (i==0)
1143                             printf(" '");
1144                         else
1145                             printf(", '");
1146                         break;
1147                     }
1148                     default:
1149                     {
1150                         if (i!=0)
1151                            printf(",");
1152                     }
1153                 }
1154             }
1155             AllDataType::printVal(value->value, value->type, value->length);
1156             if (SQL) {
1157                 switch(value->type)
1158                 {
1159                     case typeString:
1160                     case typeVarchar:
1161                     case typeBinary:
1162                     case typeDate:
1163                     case typeTime:
1164                     case typeTimeStamp:
1165                         printf("'");
1166                 }
1167             } else printf("\t");
1168         }
1169     }
1170     if (SQL) printf(");\n");
1171     return tuple;
1172 }
1173
1174 void* SelStatement::next()
1175 {
1176     if(handleAggWithTbl)
1177     {
1178        return handleSingleTableAggWithoutGroup();
1179     }
1180     return( table->fetch() );
1181 }
1182
1183
1184 void* SelStatement::getFieldValuePtr( int pos )
1185 {
1186     FieldValue *v = bindFields[pos];
1187     return ( (void*) v->value );
1188 }
1189
1190 void* SelStatement::getFieldValuePtr( char *name )
1191 {
1192     FieldValue *value;
1193     char fName[IDENTIFIER_LENGTH];
1194     for (int i = 0; i < totalFields; i++)
1195     {
1196         value = bindFields[i];
1197         table->getFieldNameAlone(value->fldName,fName);
1198         if (strcmp(fName,name)==0)
1199         {
1200             return ( (void*) value->value );
1201         }
1202
1203     }
1204     return NULL;
1205 }
1206 void SelStatement::getProjFieldType(int *data)
1207 {
1208     FieldValue *value;
1209     for (int i = 0; i < totalFields; i++)
1210     {
1211         value = bindFields[i];
1212         data[i+1] = value->type;
1213     }
1214 }
1215
1216 int SelStatement::noOfProjFields()
1217 {
1218     return totalFields;
1219 }
1220
1221 DbRetVal SelStatement::getProjFldInfo (int projpos, FieldInfo *&fInfo)
1222 {
1223
1224     DbRetVal rv = OK;
1225     //TODO::if not yet prepared return error
1226     //TODO::check the upper limit for projpos
1227     if (projpos < 0 || projpos >totalFields) return ErrBadArg;
1228     FieldValue *value = bindFields[projpos-1];
1229     fInfo->type = value->type;
1230     fInfo->length= value->length;
1231     fInfo->isNull = value->isNullable;
1232     fInfo->aType = value->aType;
1233     fInfo->offset = value->offset;
1234     fInfo->isPrimary = value->isPrimary;
1235     fInfo->isUnique = value->isUnique;
1236     fInfo->isAutoIncrement= value->isAutoIncrement;
1237     fInfo->isDefault = value->isDefault;
1238     if (fInfo->aType == AGG_UNKNOWN) {
1239         strcpy(fInfo->fldName, value->fldName);
1240         if (fInfo->isDefault) strcpy(fInfo->defaultValueBuf, value->defValBuf);
1241         return OK;
1242     }
1243     switch(fInfo->aType)
1244     {
1245        case AGG_COUNT:
1246            sprintf(fInfo->fldName, "COUNT(%s)",  value->fldName);
1247            fInfo->type = typeInt;
1248            fInfo->length = sizeof(int);
1249            break;
1250        case AGG_MIN:
1251            sprintf(fInfo->fldName, "MIN(%s)",  value->fldName);
1252            break;
1253        case AGG_MAX:
1254            sprintf(fInfo->fldName, "MAX(%s)",  value->fldName);
1255            break;
1256        case AGG_SUM:
1257            sprintf(fInfo->fldName, "SUM(%s)",  value->fldName);
1258            break;
1259        case AGG_AVG:
1260            sprintf(fInfo->fldName, "AVG(%s)",  value->fldName);
1261            fInfo->type = typeDouble;
1262            fInfo->length = sizeof(double);
1263            break;
1264        default:
1265            strcpy(fInfo->fldName, value->fldName);
1266            break;
1267     }
1268     return rv;
1269 }
1270 int SelStatement::getFldPos(char *name)
1271 {
1272     return table->getFldPos(name);
1273 }
1274
1275 bool SelStatement::isInProjectionList(char *name, AggType aType)
1276 {
1277     ListIterator iter = parsedData->getFieldNameList().getIterator();
1278     FieldName *fldName = NULL;
1279     while (iter.hasElement()) {
1280         fldName = (FieldName*) iter.nextElement();
1281         if ((strcmp(fldName->fldName, name)==0) && fldName->aType == aType) {
1282             return true;
1283         }
1284     }
1285     return false;
1286 }
1287