CODEWITHSUNDEEP
ccocoa-touchsqlite
jdl
jdl

Reputation: 6321

sqlite3_open: "unable to open database file"

I get "unable to open database file" when executing rc = sqlite3_open("test.db", &db); ??

sqlite3 *db; // sqlite3 db struct
char *zErrMsg = 0;
int rc;

// Open the test.db file
rc = sqlite3_open("test.db", &db); // <-- creates DB if not found ??

if( rc ){
    // failed
    fprintf(stderr, "ERROR: Can't open database: %s\n", sqlite3_errmsg(db));
}

Upvotes: 3

Views: 22128

Answers (2)

shankar0015
shankar0015

Reputation: 1

#define SQLITE_OK 0
sqlite3 *db;
char *zErrMsg=0;
if(sqlite3_open("demo.db", &db) == SQLITE_OK)
{
    if(sqlite3_exec(db, "select * from Users", callback, 0, &zErrMsg) == SQLITE_OK)
            msgbox1("success");
    sqlite3_close(db);
}
else
    msgbox1("failure");

here is the sample code which i use;

Upvotes: -1

Evan Mulawski
Evan Mulawski

Reputation: 55324

sqlite3_open returns an error if the database does not already exist. To create the database if it doesn't already exist, use sqlite3_open_v2 with the SQLITE_OPEN_CREATE and SQLITE_OPEN_READWRITE flags (both are required):

rc = sqlite3_open_v2(/* DB Path */, &db, SQLITE_OPEN_CREATE | SQLITE_OPEN_READWRITE, NULL);

Reference

To find /* DB PATH */, you need to base the filename off of the documents directory:

- (NSString *) applicationDocumentsDirectory 
{    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
    return basePath;
}

You can use this convenience method to combine the documents path with the database name:

NSString *documents = [self applicationDocumentsDirectory];
NSString *dbPath = [documents stringByAppendingPathComponent:@"test.db"];

rc = sqlite3_open_v2([dbPath UTF8String], &db, SQLITE_OPEN_CREATE | SQLITE_OPEN_READWRITE, NULL);

Upvotes: 10

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