Hoq to use LIKE in SQLite query - iphone

Question

I am trying to use LIKE in my code in following way:
-(void)getMatchedContacts{
if(sqlite3_open([[self GetDBPath] UTF8String], &database)== SQLITE_OK) {
NSMutableArray *arrFBContacts = [self getFBContacts];
if([arrFBContacts count]>0){
sqlite3_stmt *stmt;
for (MContact *mc in arrFBContacts){
const char *sql = "select count(*) from contacts where fname LIKE '?' and lname LIKE '?'";
if (sqlite3_prepare_v2(database, sql, -1, &stmt, NULL) != SQLITE_OK) {
NSAssert1(0, #"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database));
}
else{
NSLog(#"%#",[NSString stringWithFormat:#"%#",mc.firstname]);
NSLog(#"%#",[NSString stringWithFormat:#"%#",mc.lastname]);
sqlite3_bind_text(stmt, 1, [[NSString stringWithFormat:#"%#",mc.firstname] UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(stmt, 2, [[NSString stringWithFormat:#"%#",mc.lastname] UTF8String], -1, SQLITE_TRANSIENT);
int count =0;
if(sqlite3_step(stmt) == SQLITE_ROW) {
count = sqlite3_column_int(stmt, 0);
}
sqlite3_reset(stmt);
if(count>0){
const char *sql1 = "update fbContacts set matched = 1 where id = ?";
if (sqlite3_prepare_v2(database, sql1, -1, &stmt, NULL) != SQLITE_OK) {
NSAssert1(0, #"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database));
}
else {
sqlite3_bind_int(stmt, 1, mc.fblocalcontactid);
sqlite3_step(stmt);
}
sqlite3_reset(stmt);
}
}
}
}
}
}
But I am not able to get any value for count variable from first SQL. What is wrong in y programme?

Answer 1

You can check my function as below: In that, like query is working properly.
-(NSMutableArray *)getCategorySearchNoDueDate:(int)catId:(NSString *)searchWord{
searchWord = [#"%" stringByAppendingFormat:#"%#%%",searchWord];
NSMutableArray *tempArray = [[NSMutableArray alloc] init];
oClsDBFunction = [[clsDBFunction alloc] init];
appDelegate = (WFAppDelegate *)[[UIApplication sharedApplication] delegate];
if (appDelegate.result == SQLITE_OK) {
const char *sql;
NSString *sqlString = #"SELECT \"Project\" as objectType, \"0\" as tID, projectId as pID, \"0\" as refTID, referenceId as refPID, "
"title as pTitle, \"\" as tTitle, description as Desc, "
"startDate as StartDate, startTime as StartTime, "
"dueDate as DueDate, dueTime as DueTime, compDate as CompDate, compTime as CompTime, "
"priorityId as PriorityId, categoryId as CategoryId, "
"isCompleted as IsCompleted, status as Status, isDeleted as IsDeleted, "
"remark as Remark, repeatId as RepeatId, alertCount as AlertCount, \"0\" as TaskType, "
"(select count(*) from tblTask, tblReference "
"where tblTask.referenceId=tblReference.referenceId and tblReference.projectId = tblProject.projectId) as TotalTask, "
"(select count(*) from tblTask, tblReference "
"where tblTask.referenceId=tblReference.referenceId and tblReference.projectId = tblProject.projectId and tblTask.isCompleted=1) "
"as CompletedTask "
"FROM tblProject "
"WHERE dueDate='' and "
"IsCompleted=0 and CategoryId=? and (tblProject.title like ? or tblProject.description like ?) "
"UNION "
"SELECT \"Task\" as objectType, tblTask.taskId as tID, \"0\" as pID, tblTask.referenceId as refTID, \"0\" as refPID, "
"\"\" as pTitle, title as tTitle, description as Desc, "
"\"\" as StartDate, \"\" as StartTime, "
"dueDate as DueDate, dueTime as DueTime, compDate as CompDate, compTime as CompTime, "
"priorityId as PriorityId, categoryId as CategoryId, "
"isCompleted as IsCompleted, status as Status, isDeleted as IsDeleted, "
"remark as Remark, repeatId as RepeatId, alertCount as AlertCount, taskTypeId as TaskType, "
"\"0\" as TotalTask, "
"\"0\" as CompletedTask "
"FROM tblTask, tblReference "
"WHERE IsCompleted=0 and "
"dueDate='' and "
"CategoryId=? and "
"tblTask.referenceId = tblReference.referenceId and tblReference.projectId=0 and (tblTask.title like ? or tblTask.description like ?) "
"UNION "
"SELECT \"Task\" as objectType, tblTask.taskId as tID, tblProject.projectId as pID, tblTask.referenceId as refTID, \"0\" as refPID, "
"tblProject.title as pTitle, tblTask.title as tTitle, tblTask.description as Desc, "
"\"\" as StartDate, \"\" as StartTime, "
"tblTask.dueDate as DueDate, tblTask.dueTime as DueTime, tblTask.compDate as CompDate, tblTask.compTime as CompTime, "
"tblTask.priorityId as PriorityId, tblTask.categoryId as CategoryId, "
"tblTask.isCompleted as IsCompleted, tblTask.status as Status, tblTask.isDeleted as IsDeleted, "
"tblTask.remark as Remark, tblTask.repeatId as RepeatId, tblTask.alertCount as AlertCount, taskTypeId as TaskType, "
"\"0\" as TotalTask, "
"\"0\" as CompletedTask "
"FROM tblTask, tblReference, tblProject "
"WHERE tblTask.IsCompleted=0 and "
"tblTask.dueDate='' and "
"tblTask.CategoryId=? and "
"tblTask.referenceId = tblReference.referenceId and tblReference.projectId!=0 and "
"tblProject.projectId = tblReference.projectId and (tblTask.title like ? or tblTask.description like ?) "
"order by PriorityId DESC, IsCompleted";
sql = [sqlString UTF8String];
sqlite3_stmt *statement;
if (sqlite3_prepare_v2(appDelegate.database, sql, -1, &statement, NULL) == SQLITE_OK) {
NSString *strCatId = [NSString stringWithFormat:#"%d", catId];
sqlite3_bind_text(statement, 1, [strCatId UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 2, [searchWord UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 3, [searchWord UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 4, [strCatId UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 5, [searchWord UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 6, [searchWord UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 7, [strCatId UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 8, [searchWord UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 9, [searchWord UTF8String], -1, SQLITE_TRANSIENT);
while (sqlite3_step(statement) == SQLITE_ROW) {
NSString *strObjectType = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 0)];
NSString *strTaskId = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 1)];
NSString *strProjectId = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 2)];
NSString *strRefTaskId = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 3)];
NSString *strRefProjectId = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 4)];
NSString *strProjectTitle = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 5)];
NSString *strTaskTitle = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 6)];
NSString *strDescription = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 7)];
NSString *strStartDate = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 8)];
NSString *strStartTime = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 9)];
NSString *strDueDate = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 10)];
NSString *strDueTime = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 11)];
NSString *strCompDate = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 12)];
NSString *strCompTime = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 13)];
NSString *strPriorityId = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 14)];
NSString *strCategoryId = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 15)];
NSString *strIsCompleted = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 16)];
NSString *strStatus = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 17)];
NSString *strIsDeleted = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 18)];
NSString *strRemark = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 19)];
NSString *strRepeatId = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 20)];
NSString *strAlertCount = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 21)];
NSString *strTaskType = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 22)];
NSString *strTotalTask = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 23)];
NSString *strCompletedTask = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 24)];
oMainPage = [[MainPage alloc] init];
oMainPage.objectType = strObjectType;
oMainPage.tId = strTaskId;
oMainPage.pId = strProjectId;
oMainPage.refTId = strRefTaskId;
oMainPage.refPId = strRefProjectId;
oMainPage.pTitle = strProjectTitle;
oMainPage.tTitle = strTaskTitle;
oMainPage.strDesc = strDescription;
oMainPage.strStartDate = strStartDate;
oMainPage.strStartTime = strStartTime;
oMainPage.strDueDate = strDueDate;
oMainPage.strDueTime = strDueTime;
oMainPage.strCompDate = strCompDate;
oMainPage.strCompTime = strCompTime;
oMainPage.strPriority = strPriorityId;
oMainPage.strCategory = strCategoryId;
oMainPage.strIsCompleted = strIsCompleted;
oMainPage.strStatus = strStatus;
oMainPage.strIsDeleted = strIsDeleted;
oMainPage.strRemark = strRemark;
oMainPage.strRepeatId = strRepeatId;
oMainPage.strAlertCount = strAlertCount;
oMainPage.taskType = strTaskType;
oMainPage.totalTask = strTotalTask;
oMainPage.completedTask = strCompletedTask;
[tempArray addObject:oMainPage];
[oMainPage release];
}
}
sqlite3_finalize(statement);
} else {
NSAssert1(0, #"Failed to open database with message '%s'.", sqlite3_errmsg(appDelegate.database));
}
[oClsDBFunction release];
return tempArray;
}
Cheers.