src/tools/isql.cxx

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by www.databasecache.com                           *
   3  *   Contact: praba_tuty@databasecache.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<CSql.h>
  17 #include<DatabaseManagerImpl.h>
  18 #include <Statement.h>
  19 #include <SqlFactory.h>
  20 #include <SqlStatement.h>
  21 #define SQL_STMT_LEN 1024
  22 enum STMT_TYPE
  23 {
  24     SELECT =0,
  25     DDL ,
  26     OTHER
  27 };
  28 STMT_TYPE stmtType = SELECT;
  29 FILE *fp;
  30 AbsSqlConnection *conn;
  31 AbsSqlStatement *stmt;
  32
  33 bool autocommitmode = true;
  34 IsolationLevel isoLevel = READ_COMMITTED;
  35 void printHelp();
  36 bool getInput(bool);
  37 void printUsage()
  38 {
  39    printf("Usage: csql [-u username] [-p passwd] [-s sqlfile] \n");
  40    printf("       username -> username to connect to database\n");
  41    printf("       password -> password to connect to database\n");
  42    printf("       sqlfile -> filename containing sql statements\n");
  43    return;
  44
  45 }
  46
  47 int main(int argc, char **argv)
  48 {
  49     char username[IDENTIFIER_LENGTH];
  50     username [0] = '\0';
  51     char password[IDENTIFIER_LENGTH];
  52     password [0] = '\0';
  53     char filename[512];
  54     filename [0] ='\0';
  55     int c = 0, opt=0;
  56     while ((c = getopt(argc, argv, "u:p:s:?")) != EOF)
  57     {
  58         switch (c)
  59         {
  60             case 'u' : strcpy(username , argv[optind - 1]); break;
  61             case 'p' : strcpy(password , argv[optind - 1]); break;
  62             case 's' : strcpy(filename , argv[optind - 1]); break;
  63             case '?' : { opt = 1; break; } //print help
  64             default: printf("Wrong args\n"); exit(1);
  65
  66         }
  67     }//while options
  68     //printf("%s %s %s", username, password, filename);
  69     if (opt == 1)
  70     {
  71         printUsage();
  72         return 0;
  73     }
  74     if (username[0] == '\0' )
  75     {
  76         strcpy(username, "root");
  77         strcpy(password, "manager");
  78     }
  79     bool fileFlag = false;
  80     if (filename [0] !='\0')
  81     {
  82         fp = fopen(filename,"r");
  83         if (fp == NULL)
  84         {
  85             printf("Unable to open the file %s\n", filename);
  86             return 1;
  87         }
  88         fileFlag = true;
  89     }
  90
  91     DbRetVal rv = OK;
  92     conn = SqlFactory::createConnection(CSql);
  93     //conn = SqlFactory::createConnection(CSqlGateway);
  94     rv = conn->connect(username,password);
  95     if (rv != OK) return 1;
  96     stmt =  SqlFactory::createStatement(CSql);
  97     //stmt =  SqlFactory::createStatement(CSqlGateway);
  98     stmt->setConnection(conn);
  99     rv = conn->beginTrans();
 100     if (rv != OK) return 2;
 101     while (getInput(fileFlag) == true) continue;
 102
 103     //TODO::conn should provide method telling status of the transaction.
 104     //if running, then abort it
 105     conn->rollback();
 106     if (filename [0] !='\0')
 107     {
 108        fclose(fp);
 109     }
 110     conn->disconnect();
 111     delete stmt;
 112     delete conn;
 113     return 0;
 114 }
 115 bool handleTransaction(char *st)
 116 {
 117     while (isspace (*st)|| *st == '(' ) st++; // Skip white spaces
 118     if (strncasecmp (st, "COMMIT", 6) == 0 ||
 119         strncasecmp (st, "commit", 6) == 0 )
 120     {
 121         conn->commit();
 122         conn->beginTrans(isoLevel);
 123         return true;
 124     }
 125     else if (strncasecmp (st, "ROLLBACK", 8) == 0||
 126         strncasecmp (st, "rollback", 8) == 0)
 127     {
 128         conn->rollback();
 129         conn->beginTrans(isoLevel);
 130         return true;
 131     }
 132     else if (strncasecmp (st, "SET AUTOCOMMIT ON", 17) == 0)
 133     {
 134         autocommitmode = true;
 135         printf("AUTOCOMMIT Mode is set to ON\n");
 136         return true;
 137     }
 138     else if (strncasecmp (st, "SET AUTOCOMMIT OFF", 18) == 0)
 139     {
 140         autocommitmode = false;
 141         printf("AUTOCOMMIT Mode is set to OFF\n");
 142         return true;
 143     }
 144     else if (strncasecmp (st, "SET ISOLATION LEVEL UNCOMMITTED", 31) == 0)
 145     {
 146         isoLevel = READ_UNCOMMITTED;
 147         printf("Isolation Level is set to READ_UNCOMMITTED\n");
 148         return true;
 149     }
 150     else if (strncasecmp (st, "SET ISOLATION LEVEL COMMITTED", 29) == 0)
 151     {
 152         isoLevel = READ_COMMITTED;
 153         printf("Isolation Level is set to READ_COMMITTED\n");
 154         return true;
 155     }
 156     else if (strncasecmp (st, "SET ISOLATION LEVEL REPEATABLE", 30) == 0)
 157     {
 158         isoLevel = READ_REPEATABLE;
 159         printf("Isolation Level is set to READ_REPEATABLE\n");
 160         return true;
 161     }
 162     return false;
 163 }
 164 bool handleEchoAndComment(char *st)
 165 {
 166     while (isspace (*st)|| *st == '(' ) st++; // Skip white spaces
 167     if (strncasecmp (st, "ECHO", 4) == 0)
 168     {
 169         printf("%s\n", st);
 170         return true;
 171     }else if (strncmp(st, "--", 2) == 0)
 172     {
 173         return true;
 174     }else if (strncasecmp(st, "help", 2) == 0)
 175     {
 176         printHelp();
 177         return true;
 178     }else if (strncasecmp(st, "show tables", 11) == 0)
 179     {
 180       Connection conn;
 181       conn.open("root","manager");
 182       DatabaseManagerImpl *dbMgr =  (DatabaseManagerImpl*)conn.getDatabaseManager();
 183       List tableList = dbMgr->getAllTableNames();
 184       ListIterator iter = tableList.getIterator();
 185       Identifier *elem = NULL;
 186       int ret =0;
 187       printf("=============TableNames===================\n");
 188       int count =0;
 189       while (iter.hasElement())
 190       {
 191           elem = (Identifier*) iter.nextElement();
 192           count++;
 193           printf("   %s \n", elem->name);
 194       }
 195       if (count ==0) printf("  No tables exist\n");
 196       printf("=========================================\n");
 197       conn.close();
 198       return true;
 199     }
 200     return false;
 201 }
 202 void printHelp()
 203 {
 204     printf("CSQL Command List\n");
 205     printf("======================================================\n");
 206     printf("SHOW TABLES\n");
 207     printf("SET AUTOCOMMIT ON|OFF\n");
 208     printf("SET ISOLATION LEVEL UNCOMMITTED|COMMITTED|REPEATABLE\n");
 209     printf("CREATE TABLE|INDEX ...\n");
 210     printf("INSERT ...\n");
 211     printf("UPDATE ...\n");
 212     printf("DELETE ...\n");
 213     printf("SELECT ...\n");
 214     printf("======================================================\n");
 215 }
 216 void setStmtType(char *st)
 217 {
 218    if (strncasecmp (st, "SELECT", 6) == 0)  {stmtType=SELECT; return; }
 219    else if (strncasecmp (st, "CREATE", 6) == 0) {stmtType=DDL; return; }
 220    else if (strncasecmp (st, "DROP", 4) == 0) { stmtType=DDL; return; }
 221    stmtType = OTHER;
 222    return ;
 223 }
 224
 225 char getQueryFromStdIn(char *buf)
 226 {
 227     char    c, *bufBegin=buf;
 228     int    ln, charCnt=0;
 229
 230     ln=1;
 231     printf("CSQL>");
 232     while( (c=(char ) getchar()) != EOF && c != ';')
 233     {
 234         *buf++ = c; charCnt++;
 235         if(c=='\n') //printf("%1d>",ln++);
 236             ln++;
 237
 238         if( charCnt == SQL_STMT_LEN ) {
 239             printf("SQL Statement length is greater than %d. "
 240             "Ignoring the statement.\n", SQL_STMT_LEN );
 241             *bufBegin++ =';';
 242             *bufBegin ='\0';
 243             return 0;
 244         }
 245     }
 246     *buf++ = ';';
 247     *buf = '\0';
 248     return c;
 249 }
 250 char getQueryFromFile(char *buf)
 251 {
 252     char    c, *bufBegin=buf;
 253     int charCnt=0;
 254     while( (c=(char ) fgetc(fp)) != EOF && c != ';')
 255     {
 256         *buf++ = c; charCnt++;
 257         if( charCnt == SQL_STMT_LEN ) {
 258             printf("SQL Statement length is greater than %d. "
 259             "Ignoring the statement.\n", SQL_STMT_LEN );
 260             *bufBegin++ =';';
 261             *bufBegin ='\0';
 262             return 0;
 263         }
 264     }
 265     *buf++ = ';';
 266     *buf = '\0';
 267     return c;
 268 }
 269
 270 bool getInput(bool fromFile)
 271 {
 272     char buffer [SQL_STMT_LEN + 1];
 273
 274     char eof;
 275     if (fromFile == false)
 276         eof = getQueryFromStdIn(buffer);
 277     else
 278         eof = getQueryFromFile(buffer);
 279
 280     char *buf = buffer;
 281     while(*buf == ' ' || *buf == '\t' || *buf == '\n') buf++;
 282     if (eof == EOF || strncasecmp (buf, "quit", 4) == 0)
 283         return false;
 284     if (handleTransaction(buf)) return true;
 285     if (handleEchoAndComment(buf)) return true;
 286     if ( *buf == ';' ) return true; // Null statement.
 287
 288     setStmtType(buf);
 289
 290     DbRetVal rv = stmt->prepare(buf);
 291     if (rv != OK)
 292     {
 293         printf("Statement prepare failed with error %d\n", rv);
 294         return true;
 295     }
 296     int rows =0;
 297     rv = stmt->execute(rows);
 298     if (rv != OK)
 299     {
 300         printf("Statement execute failed with error %d\n", rv);
 301         stmt->free();
 302         return true;
 303     }
 304     if (stmtType == OTHER)
 305     {
 306         printf("Statement Executed: Rows Affected = %d\n", rows);
 307     }
 308     else if (stmtType == DDL)
 309     {
 310         printf("Statement Executed\n");
 311     }
 312     else
 313     {
 314         FieldInfo *info = new FieldInfo();
 315         printf("---------------------------------------------------------\n");
 316         printf("\t");
 317         for (int i = 0 ; i < stmt->noOfProjFields() ; i++)
 318         {
 319             stmt->getProjFldInfo(i, info);
 320             printf("%s\t", info->fldName);
 321         }
 322         printf("\n---------------------------------------------------------\n");
 323         delete info;
 324         void *tuple = NULL;
 325         while(true)
 326         {
 327             printf("\t");
 328             tuple = (char*)stmt->fetchAndPrint();
 329             printf("\n");
 330             if (tuple == NULL) { break; }
 331         }
 332         stmt->close();
 333     }
 334     stmt->free();
 335     if (autocommitmode)
 336     {
 337         conn->commit();
 338         conn->beginTrans(isoLevel);
 339         return true;
 340     }
 341
 342     return true;
 343 }