fmdb.m
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#import <Foundation/Foundation.h>
#import "FMDatabase.h"
#import "FMDatabaseAdditions.h"
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
// delete the old db.
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager removeFileAtPath:@"/tmp/tmp.db" handler:nil];
FMDatabase* db = [FMDatabase databaseWithPath:@"/tmp/tmp.db"];
if (![db open]) {
NSLog(@"Could not open db.");
return 0;
}
// create a bad statement, just to test the error code.
[db executeUpdate:@"blah blah blah"];
if ([db hadError]) {
NSLog(@"Err %d: %@", [db lastErrorCode], [db lastErrorMessage]);
}
// but of course, I don't bother checking the error codes below.
// Bad programmer, no cookie.
[db executeUpdate:@"create table test (a text, b text, c integer, d double, e double)"];
[db beginTransaction];
int i = 0;
while (i++ < 20) {
[db executeUpdate:@"insert into test (a, b, c, d, e) values (?, ?, ?, ?, ?)" ,
@"hi'", // look! I put in a ', and I'm not escaping it!
[NSString stringWithFormat:@"number %d", i],
[NSNumber numberWithInt:i],
[NSDate date],
[NSNumber numberWithFloat:2.2f]];
}
[db commit];
FMResultSet *rs = [db executeQuery:@"select rowid,* from test where a = ?", @"hi'"];
while ([rs next]) {
// just print out what we've got in a number of formats.
NSLog(@"%d %@ %@ %@ %@ %f %f",
[rs intForColumn:@"c"],
[rs stringForColumn:@"b"],
[rs stringForColumn:@"a"],
[rs stringForColumn:@"rowid"],
[rs dateForColumn:@"d"],
[rs doubleForColumn:@"d"],
[rs doubleForColumn:@"e"]);
}
// close the result set.
// it'll also close when it's dealloc'd, but we're closing the database before
// the autorelease pool closes, so sqlite will complain about it.
[rs close];
// ----------------------------------------------------------------------------------------
// blob support.
[db executeUpdate:@"create table blobTable (a text, b blob)"];
// let's read in an image from safari's app bundle.
NSData *d = [NSData dataWithContentsOfFile:@"/Applications/Safari.app/Contents/Resources/compass.icns"];
if (d) {
[db executeUpdate:@"insert into blobTable (a, b) values (?,?)", @"safari's compass", d];
rs = [db executeQuery:@"select b from blobTable where a = ?", @"safari's compass"];
if ([rs next]) {
d = [rs dataForColumn:@"b"];
[d writeToFile:@"/tmp/compass.icns" atomically:NO];
// let's look at our fancy image that we just wrote out..
system("/usr/bin/open /tmp/compass.icns");
}
else {
NSLog(@"Could not select image.");
}
[rs close];
}
else {
NSLog(@"Can't find compass image..");
}
// test out the convenience methods in +Additions
[db executeUpdate:@"create table t1 (a integer)"];
[db executeUpdate:@"insert into t1 values (?)", [NSNumber numberWithUnsignedInteger:5]];
int a = [db intForQuery:@"select a from t1 where a = ?", [NSNumber numberWithUnsignedInteger:5]];
if (a != 5) {
NSLog(@"intForQuery didn't work (a != 5)");
}
// test the busy rety timeout schtuff.
[db setBusyRetryTimeout:50000];
FMDatabase *newDb = [FMDatabase databaseWithPath:@"/tmp/tmp.db"];
[newDb open];
rs = [newDb executeQuery:@"select rowid,* from test where a = ?", @"hi'"];
[rs next]; // just grab one... which will keep the db locked.
NSLog(@"Testing the busy timeout");
BOOL success = [db executeUpdate:@"insert into t1 values (5)"];
if (success) {
NSLog(@"Whoa- the database didn't stay locked!");
return 7;
}
else {
NSLog(@"Hurray, our timeout worked");
}
[rs close];
[newDb close];
success = [db executeUpdate:@"insert into t1 values (5)"];
if (!success) {
NSLog(@"Whoa- the database shouldn't be locked!");
return 8;
}
else {
NSLog(@"Hurray, we can insert again!");
}
[db close];
[pool release];
return 0;
}