include/Parser.h

   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  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifndef PARSER_H
  21 #define PARSER_H
  22 #include <CSql.h>
  23 #include <AggTableImpl.h>
  24 #include <JoinTableImpl.h>
  25 #include <os.h>
  26 #include <Util.h>
  27 #include <Function.h>
  28 #ifndef STMT_TYPE
  29 #define STMT_TYPE
  30 enum StatementType
  31 {
  32     UnknownStatement,
  33     SelectStatement,
  34     InsertStatement,
  35     UpdateStatement,
  36     DeleteStatement,
  37     CreateTableStatement,
  38     DropTableStatement,
  39     CreateIndexStatement,
  40     DropIndexStatement,
  41     CacheTableStatement,
  42     CompactTableStatement,
  43     CopyTableStatement,
  44     MetaStatement,
  45     UserStatement,
  46     MgmtStatement,
  47     AlterStatement,
  48     TruncateStatement
  49 };
  50 #endif
  51
  52 struct FieldValue
  53 {
  54     char fldName[IDENTIFIER_LENGTH];
  55     char defValBuf[DEFAULT_VALUE_BUF_LENGTH];
  56     char *parsedString;
  57     void *value;
  58     int paramNo; // 0 ->not a param. It stores the param position
  59     DataType type;
  60     AggType aType;
  61     int length;
  62     size_t offset;
  63     bool isNullable;
  64     bool isAllocVal;
  65     bool isInResSet;
  66     bool isPrimary;
  67     bool isUnique;
  68     bool isAutoIncrement;
  69     bool isDefault;
  70 };
  71
  72
  73 struct ConditionValue
  74 {
  75     char *parsedString;
  76     void *value;
  77     int paramNo; // 0 ->not a param. It stores the param position
  78     DataType type;
  79     AggType aType;
  80     int length;
  81     bool opLike;
  82     bool isNullable;
  83     char fName[IDENTIFIER_LENGTH];
  84     bool isFunctionInvolve;
  85 };
  86
  87 struct FieldName
  88 {
  89     char fldName[IDENTIFIER_LENGTH];
  90     AggType aType; //used only in case of select projection
  91     char aliasFldName[IDENTIFIER_LENGTH];
  92     FieldName()
  93     {
  94         strcpy(fldName,"");
  95         strcpy(aliasFldName,"");
  96         aType = AGG_UNKNOWN;
  97     }
  98 };
  99 struct TableName
 100 {
 101     char tblName[IDENTIFIER_LENGTH];
 102     char aliasName[IDENTIFIER_LENGTH];
 103     TableName()
 104     {
 105         strcpy(tblName,"");
 106         strcpy(aliasName,"");
 107     }
 108 };
 109 #ifndef JOINTYPE
 110 #define JOINTYPE
 111 enum JoinType
 112 {
 113     INNER_JOIN = 1,
 114     RIGHT_JOIN,
 115     LEFT_JOIN,
 116     FULL_JOIN,
 117     UNKNOWN_JOIN
 118 };
 119 #endif
 120
 121 struct JoinTypeNode
 122 {
 123     JoinType jType;
 124     JoinTypeNode(){ jType = INNER_JOIN; }
 125 };
 126
 127 struct UpdateFieldValue
 128 {
 129     char fldName[IDENTIFIER_LENGTH];
 130     char *parsedString;
 131     void *value;
 132     Expression *expre;
 133     DataType type;
 134     int length;
 135     bool isNullable;
 136     int paramNo;
 137 };
 138
 139 enum UserNodeType
 140 {
 141     CREATEUSER=0,
 142     DROPUSER,
 143     ALTERUSER
 144 };
 145 enum AlterTableType
 146 {
 147     ALTERADD=0,
 148     ALTERDROP,
 149     ALTERMODIFY,
 150     ALTERFIELDRENAME,
 151     ALTERTABLERENAME
 152 };
 153
 154
 155 class UserNode
 156 {
 157     public:
 158     char userName[IDENTIFIER_LENGTH];
 159     char passName[IDENTIFIER_LENGTH];
 160     UserNodeType type;
 161 };
 162
 163 class ParsedData
 164 {
 165     private:
 166     char tblName[IDENTIFIER_LENGTH];
 167     char idxName[IDENTIFIER_LENGTH]; //Also used for rename table
 168     char pkTblName[IDENTIFIER_LENGTH];//This is also used as DSN name when cachestatement executed and copy table statemnet
 169     StatementType stmtType;
 170     bool isDistinct;
 171     bool isExplain;
 172
 173     int paramCounter;
 174
 175     List tableNameList;
 176     List joinTypeList;
 177     //holds pointer to field names. used in insert to store field name list
 178     //and for projection list of select
 179     //also used to store primary or unique key fields in create statement
 180     List fieldNameList;
 181
 182     List groupFieldNameList;
 183
 184     List havingFieldNameList;
 185
 186     List orderFieldNameList;
 187
 188     //holds pointer to condition values.
 189     List conditionValueList;
 190
 191     List secondaryIndexFieldList;
 192     //holds pointer to field values. used in insert to store field values
 193     //used in update to store the current value returned by fetch().This gets replaced
 194     //by value in updFldValList and then update() is called.
 195     List fieldValueList;
 196
 197     //used to store IN values of SELECT statement
 198     //This should be a list of list. so that multiple IN shall be present
 199     //in the select statement
 200     List inValueList;
 201
 202     //update field value list. used to store the values to be updated
 203     //value in the SET clause of UPDATE statement is stored here.
 204     List updFldValList;
 205
 206     //stores the where clause condition for SELECT, UPDATE and DELETE
 207     Condition predicate;
 208     Condition havingPredicate;
 209     List predList;
 210
 211     //stores field information in CREATE TABLE
 212     FieldDef fldDef;
 213     //User Management
 214     UserNode *userNode;
 215     //stores list of fields for CREATE TABLE
 216     FieldList creFldList;
 217     //Foreign Key storage
 218
 219     List fkFieldNameList;
 220     List pkFieldNameList;
 221     List foreignKeyList;
 222     bool isForeign;
 223     bool shouldCreateTbl;
 224     //ALTER Statement
 225     AlterTableType aTblType;
 226     //stores index information
 227     bool isUnique;
 228     bool isPrimary;
 229     bool isAutoIncrement;
 230     IndexType indexType;
 231     ResultSetPlan plan;
 232     int bucketSize;
 233     //Cache table
 234     char hcondition[IDENTIFIER_LENGTH];
 235     char vcondition[IDENTIFIER_LENGTH];
 236     bool hCondFld;
 237     bool vCondFld;
 238     bool pkFld;
 239     bool forceOption;
 240     bool direct;
 241     bool uncache;
 242     bool noschema;
 243     bool dsn;
 244     int limit;
 245     int offset;
 246     bool isWorthyToCache;
 247     FunctionType ftype;
 248     public:
 249     ParsedData() { limit = 0;  offset= 0; paramCounter = 0; stmtType = UnknownStatement;  isDistinct = false; isExplain=false;
 250                  isUnique = false; isPrimary = false; isAutoIncrement=false ;indexType = hashIndex; plan = Normal; bucketSize=0; isForeign=false; hCondFld=false; vCondFld=false;pkFld=false;forceOption=false; direct=false; uncache=false; noschema=false; dsn=false;
 251     shouldCreateTbl=false; userNode = NULL; isWorthyToCache=false; ftype = UNKNOWN_FUNCTION;
 252     }
 253     void setFunctionType(FunctionType type) { ftype = type; }
 254     FunctionType getFunctionType(){ return ftype;}
 255     void setAlterType(AlterTableType type){ aTblType = type;}
 256     AlterTableType getAlterType(){ return aTblType; }
 257
 258     void createUserNode(char *name, char *password);
 259     char *getUserName() { return userNode->userName; }
 260     char *getPassWord() { return userNode->passName; }
 261     UserNodeType getUserType() { return userNode->type; }
 262     void dropUserNode(char *name);
 263     void alterUserNode(char *name, char *password);
 264
 265     void setCreateTbl(){ shouldCreateTbl=true; }
 266     bool getCreateTbl(){ return shouldCreateTbl; }
 267
 268     void setDSN(bool flag){ dsn = flag;}
 269     bool getDSN(){ return dsn; }
 270     void setNoSchema(bool flag){ noschema = flag; }
 271     bool getNoSchema(){return noschema;}
 272     char *getHCondition(){return hcondition;}
 273     char *getVCondition(){return vcondition;}
 274     void setHCondition(char *fld){ strcpy(hcondition,fld);}
 275     void setVCondition(char *fld){ strcpy(vcondition,fld);}
 276     void setHCondFld(bool flag){hCondFld = flag;}
 277     bool getHCondFld(){return hCondFld;}
 278     void setVCondFld(bool flag){vCondFld = flag;}
 279     bool getVCondFld(){return vCondFld;}
 280     void setPkFld(bool flag){pkFld = flag;}
 281     bool getPkFld(){return pkFld;}
 282     void setDirect(bool flag){direct=flag;}
 283     bool getDirect(){return direct;}
 284     void setUnCache(bool flag){uncache=flag;}
 285     bool getUnCache(){return uncache;}
 286     void setLimit(int l, int o) { limit =l; offset=o; }
 287     int getLimit(){ return limit; }
 288     int getOffset(){ return offset; }
 289
 290
 291     int getBucketSize(){return bucketSize; };
 292     void setBucketSize(int bucket){ bucketSize = bucket; };
 293     void setStmtType(StatementType type) { stmtType = type; }
 294     void setTableName(char *name) { strcpy(tblName, name); }
 295     void setIndexName(char *name) { strcpy(idxName, name); }
 296     void setPKTableName(char *name){strcpy(pkTblName, name); }
 297     void setResultSetPlan(ResultSetPlan pl){plan = pl;}
 298     ResultSetPlan getResultSetPlan(){return plan;}
 299     char* getTableName() { return tblName; }
 300     char* getIndexName() { return idxName; }
 301     char* getPKTableName(){ return pkTblName;}
 302     DbRetVal setAutoIncreament(bool flag);
 303     bool getAutoIncreament();
 304     void insertValue(char *value);
 305     void insertInValue(char *value);
 306         // third parameter is to avoid conflict between '?' between like operand and parameterized value in sql statement.
 307         // eg: select * from t1 where f1 = ? and f2 like '_ti%';
 308         // _ is converted to ? before it is processed
 309     void** insertCondValueAndGetPtr(char *fName, char *value, bool opLike=false, AggType atp=AGG_UNKNOWN, bool isInHaving=false,bool function=false);
 310     void insertCondValue(char *fldName); //For Predecate t1.f1=t2.f1
 311     void insertUpdateValue(char *fldName, char *value);
 312
 313     void insertField(char *fName, AggType aggType= AGG_UNKNOWN);
 314     void insertFieldAlias(char *name);
 315     void insertGroupField(char *fName);
 316     void insertOrderByField(char *fName, bool isDesc= false);
 317     void clearFieldNameList();
 318     void insertTableName(char *value);
 319     void insertJoinType(JoinType jType);
 320     void insertTableName(char *value, char *alias);
 321     void insertFKField(char *fkName);
 322     void insertPKField(char *pkName);
 323     void insertForeignKeyList();
 324     Predicate* insertPredicate(char *fldName, ComparisionOp op, void** value, AggType aggType = AGG_UNKNOWN);
 325     Predicate* insertPredicate(char *fldName, ComparisionOp op, char *fldName1);
 326     Predicate* insertBetPredicate(char *fldName, ComparisionOp op1, void **value1, ComparisionOp op2, void **value2);
 327     Predicate* insertPredicate(Predicate *p1, LogicalOp op, Predicate *p2 = NULL);
 328     Predicate* insertPredicate(Expression *exp, ComparisionOp op,void **val);
 329     Predicate* insertPredicate(Expression *exp, ComparisionOp op,char *fName2);
 330     Predicate* insertPredicate(Expression *exp1, ComparisionOp op,Expression *exp2);
 331     Predicate* insertNullPredicate(char *fName, ComparisionOp op,bool nullFlag);
 332     void setCondition(Predicate *pred)
 333     {
 334         predicate.setPredicate(pred);
 335     }
 336     void setHavingCondition(Predicate *pred)
 337     {
 338         havingPredicate.setPredicate(pred);
 339     }
 340     Condition* getCondition() { return &predicate; }
 341     Condition* getHavingCondition() { return &havingPredicate; }
 342
 343     void insertFieldValue(FieldValue *newVal) { fieldValueList.append(newVal); }
 344
 345     List getFieldNameList() { return fieldNameList; }
 346     List getGroupFieldNameList() { return groupFieldNameList; }
 347     List getHavingFieldNameList() { return havingFieldNameList; }
 348     List getOrderFieldNameList() { return orderFieldNameList; }
 349     List getConditionValueList() { return conditionValueList; }
 350     List getFieldValueList() { return fieldValueList; }
 351     List getInValueList() { return inValueList; }
 352     List getUpdateFieldValueList() { return updFldValList; }
 353     List getTableNameList() { return tableNameList; }
 354     List getJoinTypeList() { return joinTypeList; }
 355     List getSecondaryIndexFieldList() { return secondaryIndexFieldList; }
 356     List getForeignKeyList(){ return foreignKeyList;}
 357     List getPkFieldNameList(){return pkFieldNameList;}
 358     List getFkFieldNameList(){return fkFieldNameList;}
 359
 360     void setDistinct() { isDistinct = true;}
 361     bool getDistinct() { return isDistinct; }
 362     void setExplain() { isExplain=true; }
 363     bool getExplain() { return isExplain; }
 364     bool getCacheWorthy() { return isWorthyToCache; }
 365     void setCacheWorthy(bool flag) { isWorthyToCache = flag;}
 366
 367
 368     void setFldName(char *name);
 369     void setFldType(DataType type);
 370     DataType getFldType();
 371     DbRetVal setFldLength(size_t length);
 372     DbRetVal setDefaultValue(char * value);
 373     DbRetVal validateDefaultValue(char* value);
 374     //void setFldDefaultValue -- will need two parametersers, check how u want to pass default value.
 375     void setFldNotNull(bool notNull);
 376     void setForeign(bool foreign){ isForeign = foreign; }
 377     void setUnique(bool unique){ isUnique = unique; }
 378     void setPrimary(bool primary) { isPrimary = primary; }
 379     void setIndexType (IndexType type) { indexType = type; }
 380     IndexType getIndexType(){ return indexType; }
 381     bool getUnique() { return isUnique; }
 382     bool getPrimary() { return isPrimary; }
 383     Expression* insertExpression(char *fldName);
 384     Expression* insertExpression(char *value, bool flag);
 385     Expression* insertExpression(Expression* exp1, ArithOperator op ,Expression* exp2);
 386     Expression* insertExpression(Expression* exp1, FunctionType type,Expression* exp2);
 387     void insertUpdateExpression(char *fName, Expression *exp);
 388
 389     void insertFldDef(); //check if fldDef needs to be a part of ParsedData
 390
 391     FieldList getCreFldList() { return creFldList; }
 392
 393     StatementType getStmtType() { return stmtType; }
 394     char *getFldName();
 395     void setAutoFldName(char *fldName);
 396     void reset();
 397     void init();
 398
 399 };
 400
 401 #endif
 402
 403 //TODO: Aruna
 404 //variable and function names suck, change if u want to
 405 //setFldDefaultValue
 406 //finding out if fldDef needs to be part of parsedData, or can allocate memory and pass around
 407 //primary key
 408 //foreign key