I have made a function to get data from sqlite but somehow i am getting unknown error.I have used prepare statement concept here.Other functions like this are working fine but not this function.Please tell me what is the issue?
- (SubComponent*) getSeSubComponentDataBySubclientClientInspectionid:(NSString*)componentid : (NSString *)subclientid : (NSString *)clientId : (NSString *)inspectionid
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
const char *query_stmt = "select * FROM sesubcomponent WHERE subcomponentid = ? AND subclientid = ? AND clientid = ? AND inspectionid = ?";
SubComponent *resultArray = [[SubComponent alloc]init];
if (sqlite3_prepare_v2(database,query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
componentid=[NSString stringWithFormat:#"%#",componentid];
subclientid=[NSString stringWithFormat:#"%#",subclientid];
clientId=[NSString stringWithFormat:#"%#",clientId];
inspectionid=[NSString stringWithFormat:#"%#",inspectionid];
sqlite3_bind_text(statement, 1, [componentid UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 2, [subclientid UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 3, [clientId UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(statement, 4, [inspectionid UTF8String], -1, SQLITE_TRANSIENT);
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *component_id = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
resultArray.componentid = component_id;
NSString *name = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 1)];
resultArray.componentName = name;
NSString *createddate = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 2)];
resultArray.componentcreateddate = createddate;
NSString *subclientid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 3)];
resultArray.componentsubclientid = subclientid;
NSString *clientid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 4)];
resultArray.componentClientid = clientid;
NSString *entityid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 5)];
resultArray.componentEntityid = entityid;
NSString *inspectionid = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 6)];
resultArray.componentinspectionid = inspectionid;
NSString *clientName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 8)];
resultArray.componentClientName = clientName;
NSString *subclientName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 9)];
resultArray.componentSubclientName = subclientName;
sqlite3_finalize(statement); sqlite3_close(database);
sqlite3_close(database);
return resultArray;
}
else
{
NSLog(#"%s getSeSubComponentDataBySubclientClientInspectionid arrow is ",sqlite3_errmsg(database));
}
sqlite3_finalize(statement);
}
else
{
NSLog(#"getSeSubComponentDataBySubclientClientInspectionid error is %s",sqlite3_errmsg(database));
}
sqlite3_close(database);
}
return nil;
}
Related
This question already has an answer here:
when to call SQLite cleanup functions?
(1 answer)
Closed 6 years ago.
I have used sqlite database in my app.I am doing CURD operation.I get data from json then i convert that data into arrays after that from arrays i insert the data into sqlite database.In my app when data can be upto more than 1000 records.When database is done then i get memory warning.
I have one function for Inserting data.It firstly check if data exists then update data else insert new record
[[DBManager getSharedInstance]insertData:object];
Function definition -
(BOOL) insertData:(SubComponent *)subcomponent
{
const char *dbpath = [databasePath UTF8String];
if([self getSubComponentDataBySubclientClientInspectionid:subcomponent.componentid : subcomponent.componentsubclientid:subcomponent.componentClientid : subcomponent.componentinspectionid] != nil)
{
[self updateCompSubComponentDataBySubclientId:subcomponent];
return YES;
}
else
{
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
if (sqlite3_exec(database, [#"PRAGMA CACHE_SIZE=500000;" UTF8String], NULL, NULL, NULL) == SQLITE_OK) {
NSLog(#"Successfully changed cache size");
}
else
NSLog(#"Error: failed to set cache size with message %s.", sqlite3_errmsg(database));
NSLog(#"inside isnert query");
NSString *insertSQL = [NSString stringWithFormat:
#"insert into subcomponent(subcomponentid,name,createddate,subclientid,clientid,cliententityid, inspectionid, initialstatus,componentclientname,componentsubclientname, checkedstatus) values (\"%#\",\"%#\",\"%#\",\"%#\",\"%#\",\"%#\",\"%#\",\"%ld\",\"%#\",\"%#\",\"2\")",subcomponent.componentid,subcomponent.componentName,subcomponent.componentcreateddate,subcomponent.componentsubclientid,subcomponent.componentClientid, subcomponent.componentEntityid,subcomponent.componentinspectionid,(long)subcomponent.componentStatus,subcomponent.componentClientName,subcomponent.componentSubclientName];
NSLog(#"%#",insertSQL);
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(database, insert_stmt,-1, &statement, NULL);
if (sqlite3_step(statement) == SQLITE_DONE)
{
sqlite3_finalize(statement);
return YES;
}
else
{
NSLog(#"REMASH DB ERROR %s",sqlite3_errmsg(database));
// sqlite3_reset(statement);
//sqlite3_close(database);
sqlite3_finalize(statement);
return NO;
}
}
sqlite3_close(database);
}
return YES;
}
GET DATA FUNCTION
- (SubComponent*) getSubComponentDataBySubclientClientInspectionid:(NSString*)componentid : (NSString *)subclientid : (NSString *)clientId : (NSString *)inspectionid
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:#"select * from subcomponent where subcomponentid = \"%#\" and subclientid = \"%#\" and clientid = \"%#\" and inspectionid = \"%#\"",componentid,subclientid, clientId,inspectionid];
NSLog(#"gghgh query is %#",querySQL);
const char *query_stmt = [querySQL UTF8String];
SubComponent *resultArray = [[SubComponent alloc]init];
if (sqlite3_prepare_v2(database,query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *component_id = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
resultArray.componentid = component_id;
NSString *name = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 1)];
resultArray.componentName = name;
NSString *createddate = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 2)];
resultArray.componentcreateddate = createddate;
NSString *subclientid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 3)];
resultArray.componentsubclientid = subclientid;
NSString *clientid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 4)];
resultArray.componentClientid = clientid;
NSString *entityid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 5)];
resultArray.componentEntityid = entityid;
NSString *inspectionid = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 6)];
resultArray.componentinspectionid = inspectionid;
NSString *clientName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 8)];
resultArray.componentClientName = clientName;
NSString *subclientName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 9)];
resultArray.componentSubclientName = subclientName;
// sqlite3_finalize(statement);
// sqlite3_close(database);
return resultArray;
}
else
{
// sqlite3_finalize(statement);
// sqlite3_close(database);
return nil;
}
}
else
{
NSLog(#"error is %s",sqlite3_errmsg(database));
}
}
// sqlite3_reset(statement);
// sqlite3_finalize(statement);
sqlite3_close(database);
return nil;
}
Update Function
-(void)updateCompSubComponentDataBySubclientId:(SubComponent *)subcomponent
{
NSLog(#"inside update data");
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
if (sqlite3_exec(database, [#"PRAGMA CACHE_SIZE=500000;" UTF8String], NULL, NULL, NULL) == SQLITE_OK) {
NSLog(#"Successfully changed cache size");
}
else
NSLog(#"Error: failed to set cache size with message %s.", sqlite3_errmsg(database));
NSString *querySql=[NSString stringWithFormat:
#"UPDATE subcomponent SET name=\"%#\", createddate=\"%#\", cliententityid =\"%#\",componentclientname=\"%#\", componentsubclientname = \"%#\", checkedstatus = \"2\" where subcomponentid = \"%#\" and subclientid = \"%#\" and clientid = \"%#\" and inspectionid =\"%#\"",subcomponent.componentName,subcomponent.componentcreateddate, subcomponent.componentEntityid,subcomponent.componentClientName,subcomponent.componentSubclientName,subcomponent.componentid, subcomponent.componentsubclientid,subcomponent.componentClientid,subcomponent.componentinspectionid];
const char *sql=[querySql UTF8String];
if(sqlite3_prepare_v2(database,sql, -1, &statement, NULL) == SQLITE_OK)
{
if(SQLITE_DONE != sqlite3_step(statement))
{
NSLog(#"REMASH Error while updating. '%s'", sqlite3_errmsg(database));
}
else
{
//sqlite3_reset(statement);
NSLog(#"Update done successfully!");
}
}
NSLog(#"NOT OK");
sqlite3_finalize(statement);
sqlite3_close(database);
}
}
PS:Can somebody suggest whether use of sqlite_finilaize(),sqlite_close().sqlite_reset() is correct by seeing my code.Because memory is increasing.
This is not a Database issue.
This issue is caused because Application doesn't have a storyboard for the device you are trying to run upon.
XCode no valid compiled storyboard at path
I am storing multiple values in Sqlite database in my iOS app.
I need to retrieve the values under "cellForRowAtIndexPath"
- (NSString *) retrieveDetailText :(NSString *) emailAddress :(NSString *) uidText :(NSString *) folderName {
NSString *detailText = nil;
const char *dbpath = [databasePath UTF8String];
//SQLIte Statement
NSString *selettablequery = [NSString stringWithFormat:#"select * from MailFolderDBTable"];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
if (sqlite3_prepare(database, [selettablequery UTF8String], -1, &statement, NULL) ==SQLITE_OK)
{
while(sqlite3_step(statement) == SQLITE_ROW)
{
char *uidfield = (char *) sqlite3_column_text(statement, 5);
NSString *uidStr = [[NSString alloc] initWithUTF8String: uidfield];
NSLog(#"retrieveDetailText: uidStr: %#", uidStr);
if([uidStr isEqualToString:uidText]) {
char *emailstring = (char *) sqlite3_column_text(statement, 6);
NSString *detailTextData = [[NSString alloc] initWithUTF8String: emailstring];
NSData *data = [[NSData alloc] initWithBase64EncodedString:detailTextData options:NSDataBase64DecodingIgnoreUnknownCharacters];
detailText = [NSKeyedUnarchiver unarchiveObjectWithData:data];
}
From this code, I need to loop through at while(sqlite3_step(statement) == SQLITE_ROW)
As I am calling retrieveDetailText under cellForRowAtIndexPath, and it is not looping through here while(sqlite3_step(statement) == SQLITE_ROW), It checks if([uidStr isEqualToString:uidText]) only one time.
How can i loop through while(sqlite3_step(statement) until all the rows checked and get the value.
If you only need one row which satisfies uidText, then you can change your query no?
//SQLIte Statement
NSString *selettablequery = [NSString stringWithFormat:#"select * from MailFolderDBTable where uid = %#", uidText];
Otherwise, you can fetch all the data before loading your tableView, in an array and then use it as your tableView data source.
i am Newbie in iOS Development, and First time Use Sqllite database so Sorry For this Question but i am So Confusing Please Give me Solution for this.
I added Data in to My Sqllite Table Like as
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
sqlite3_stmt *statement;
const char *dbpath = [_databasePath UTF8String];
if (sqlite3_open(dbpath, &_myDatabase) == SQLITE_OK) {
NSString *insertSQL = [NSString stringWithFormat:
#"INSERT INTO ALLREADTABLE (PostId, PostTitle, ImageLink, ShortDescription,Category,PostDate) VALUES (\"%#\", \"%#\", \"%#\", \"%#\",\"%#\",\"%#\")",
post_id, cell.headLabel.text, image,self.shortDiscription,cell.categoryLabel.text,cell.timeLabel.text];
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(_myDatabase, insert_stmt,
-1, &statement, NULL);
if (sqlite3_step(statement) == SQLITE_DONE)
{
NSString *string=[NSString stringWithFormat:#"Value Added %# %# %# %# %# %#",post_id, cell.headLabel.text, image,self.shortDiscription,cell.categoryLabel.text,cell.timeLabel.text];
NSLog(#"String %#",string);
} else
{
NSLog(#"Failed to add contact");
}
sqlite3_finalize(statement);
sqlite3_close(_myDatabase);
}
Then it is added data in to Data Base as I want and it also added Duplicate Value in to table , so For Distinct Value i Write a Code to Fetch data like as
- (void)getTextFomDB
{
NSString *docsDir;
NSArray *dirPaths;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = dirPaths[0];
// Build the path to the database file
_databasePath = [[NSString alloc]
initWithString: [docsDir stringByAppendingPathComponent:
#"sampleDatabase.db"]];
const char *dbpath = [_databasePath UTF8String];
sqlite3_stmt *statement;
if (sqlite3_open(dbpath, &_myDatabase) == SQLITE_OK)
{
NSString *querySQL = #"SELECT DISTINCT PostId, PostTitle, ImageLink, ShortDescription,Category,PostDate FROM ALLREADTABLE";
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(_myDatabase, query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
[self.postId removeAllObjects];
[self.postTitle removeAllObjects];
[self.imageLink removeAllObjects];
[self.shortDecsription removeAllObjects];
[self.category removeAllObjects];
[self.postDate removeAllObjects];
while (sqlite3_step(statement) == SQLITE_ROW) {
//NSString *personID = [[NSString alloc] initWithUTF8String: (const char *) sqlite3_column_text(statement, 0)];
NSString *postId = [[NSString alloc] initWithUTF8String: (const char *) sqlite3_column_text(statement, 1)];
NSString *postTitle = [[NSString alloc] initWithUTF8String: (const char *) sqlite3_column_text(statement, 2)];
NSString *ImageLink = [[NSString alloc] initWithUTF8String: (const char *) sqlite3_column_text(statement, 3)];
NSString *shortDescrip = [[NSString alloc] initWithUTF8String: (const char *) sqlite3_column_text(statement, 4)];
NSString *Category = [[NSString alloc] initWithUTF8String: (const char *) sqlite3_column_text(statement, 5)];
NSString *postDate = [[NSString alloc] initWithUTF8String: (const char *) sqlite3_column_text(statement, 6)];
[self.postId addObject:[NSString stringWithFormat:#"%# ", postId]];
[self.postTitle addObject:[NSString stringWithFormat:#"%# ",postTitle]];
[self.imageLink addObject:[NSString stringWithFormat:#"%#",ImageLink]];
[self.shortDecsription addObject:[NSString stringWithFormat:#" %#",shortDescrip]];
[self.category addObject:[NSString stringWithFormat:#" %#",Category]];
[self.postDate addObject:[NSString stringWithFormat:#" %#",postDate]];
}
sqlite3_finalize(statement);
}
sqlite3_close(_myDatabase);
}
}
Then it Give me Error like as
[NSPlaceholderString initWithUTF8String:]: NULL cString
Here I want Distinct Value From My SqlliteTable. please Give me Solution For that. I know It is easy But i am Newbie in Database so please Sorry
and Thanks in advance.
You are using initWithUTF8String to get values from database, So if there is a field in database which accept null data than it will gives you an error when you are trying to fetch null data from database.
I suggest you replace all data retrieving code like
NSString *postId = [[NSString alloc] initWithUTF8String: (const char *) sqlite3_column_text(statement, 1)];
with below code:
NSString *postId = [NSString stringWithUTF8String:(const char *) sqlite3_column_text(statement, 1)];
This will replace not null data to an empty string.
This is being caused by trying to create a NSString object with a NULL string. It is on one of these lines:
[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, ...)];
So, before you create a NSString with the results of the sql statement you need to check for NULL like this:
char *tmp = sqlite3_column_text(statement, 1);
if (tmp == NULL)
postId = nil;
else
postId = [[NSString alloc] initWithUTF8String:tmp];
Reference: lnafziger
The count returns 3 ,as i have 3 rows in the column. But when i try to publish the name , it only returns 1 row.
please take a look at my code.
sqlite3_stmt *statement;
const char *dbpath = [_databasePath UTF8String];
if (sqlite3_open(dbpath, &_chatDB) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:
#"SELECT MESSAGE from CHATCOMPLETE"];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(_chatDB,
query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *name = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
NSLog(#"Name is %#",name);
}
}
else{
NSLog(#"Not found");
// return nil;
}
sqlite3_reset(statement);
}
}
Change your if/else to a while to step through all the rows:
while (sqlite3_step(statement) == SQLITE_ROW) {
NSString *name = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
NSLog(#"Name is %#",name);
}
Then you can process all of the results.
And you should change sqlite3_reset to sqlite3_finalize. And don't forget to close the database too.
I might be doing this all wrong as I am still new to Objective C.
I am trying to retrieve data from an sqlite3 database and store it in a NSObject array.
Here is the viewDidLoad method in my implementation file.
- (void)viewDidLoad
{
[super viewDidLoad];
clients = [[NSMutableArray alloc] init];
[self openDB];
NSString *sql = [NSString stringWithFormat:#"SELECT * FROM clients"];
sqlite3_stmt *statement;
if(sqlite3_prepare_v2(db, [sql UTF8String], -1, &statement, nil)==SQLITE_OK)
{
while (sqlite3_step(statement)==SQLITE_ROW) {
char *field1 = (char *) sqlite3_column_text(statement, 0);
NSString *field1Str = [[NSString alloc]initWithUTF8String:field1];
char *field2 = (char *) sqlite3_column_text(statement, 1);
NSString *field2Str = [[NSString alloc]initWithUTF8String:field2];
char *field3 = (char *) sqlite3_column_text(statement, 2);
NSString *field3Str = [[NSString alloc]initWithUTF8String:field3];
char *field4 = (char *) sqlite3_column_text(statement, 3);
NSString *field4Str = [[NSString alloc]initWithUTF8String:field4];
char *field5 = (char *) sqlite3_column_text(statement, 4);
NSString *field5Str = [[NSString alloc]initWithUTF8String:field5];
char *field6 = (char *) sqlite3_column_text(statement, 5);
NSString *field6Str = [[NSString alloc]initWithUTF8String:field6];
char *field7 = (char *) sqlite3_column_text(statement, 6);
NSString *field7Str = [[NSString alloc]initWithUTF8String:field7];
char *field8 = (char *) sqlite3_column_text(statement, 7);
NSString *field8Str = [[NSString alloc]initWithUTF8String:field8];
char *field9 = (char *) sqlite3_column_text(statement, 8);
NSString *field9Str = [[NSString alloc]initWithUTF8String:field9];
ClientObj *c1 = [[ClientObj alloc] initWithCompanyName:field1Str firstName:field2Str lastName:field3Str email:field4Str workPhone:field5Str mobilePhone:field6Str streetAddress:field7Str city:field8Str postalCode:field9Str];
}
}
self.clients = [NSArray arrayWithObjects:c1,c2,c3,c4, nil];
}
I am trying to increment *c1 each time the while statement loops through the database. eg. c1, c2 ,c3, c4
I am then trying to add each ClientObj created from the database loop above to the clients array but I am not sure how to do this.
Any help or advice is very much appreciated
Initialize the array once before the loop:
self.clients = [[NSMutableArray alloc] init];
and then just add each client object to the array inside the loop:
while (sqlite3_step(statement) == SQLITE_ROW) {
// ...
ClientObj *c = [[ClientObj alloc] initWithCompanyName:field1Str firstName:field2Str lastName:field3Str email:field4Str workPhone:field5Str mobilePhone:field6Str streetAddress:field7Str city:field8Str postalCode:field9Str];
[self.clients addObject:c];
}