int lem::sqlite_select_int( struct sqlite3* hdb, const lem::FString & Select )
{
LEM_CHECKIT_Z( hdb!=NULL );
LEM_CHECKIT_Z( !Select.empty() );
int retval=-1;
sqlite3_stmt *stmt=NULL;
const char *dummy;
int res = sqlite3_prepare_v2( hdb, Select.c_str(), Select.length(), &stmt, &dummy );
if( res==SQLITE_OK )
{
res = sqlite3_step( stmt );
if( res == SQLITE_ROW )
{
try
{
retval = sqlite3_column_int(stmt,0);
}
catch(...)
{
}
}
sqlite3_finalize(stmt);
}
else
{
lem::MemFormatter msg;
msg.printf( "SQLite error: can not execute query %s, message=%us", Select.c_str(), lem::sqlite_errmsg(hdb).c_str() );
throw E_BaseException( msg.string() );
}
return retval;
}
void NGramsStorage_SQLITE::SelectFStrings( const lem::FString &Select, lem::Collect<lem::FString> &list )
{
LEM_CHECKIT_Z( !Select.empty() );
sqlite3_stmt *stmt=NULL;
int res = sqlite3_prepare_v2( hdb, Select.c_str(), -1, &stmt, NULL );
if( res==SQLITE_OK )
{
while( sqlite3_step( stmt ) == SQLITE_ROW )
{
lem::FString s = lem::sqlite_column_fstring( stmt, 0 );
list.push_back(s);
}
sqlite3_finalize(stmt);
}
return;
}
int NGramsStorage_SQLITE::SelectInt( const lem::FString &Select, int def )
{
LEM_CHECKIT_Z( !Select.empty() );
int retval=def;
sqlite3_stmt *stmt=NULL;
int res = sqlite3_prepare_v2( hdb, Select.c_str(), -1, &stmt, NULL );
if( res==SQLITE_OK )
{
if( sqlite3_step( stmt ) == SQLITE_ROW )
{
retval = sqlite3_column_int(stmt,0);
}
sqlite3_finalize(stmt);
}
return retval;
}
void NGramsStorage_SQLITE::ExecuteSql( const lem::FString &sql, bool check )
{
LEM_CHECKIT_Z( !sql.empty() );
ExecuteSql(sql.c_str(),check);
return;
}
