Hello,
how to process if the select-statement selects a column with NULL ?
==
char *mydetails;
char *sql;
sqlite3_stmt *stmt;
sqlite3 *db;
const char dbname[] = mysqlite.db;
sql = Select mydetails from mytable;
rc = sqlite3_prepare(db, sql,
// here maybe NULL is returned ?
mydetails = (char*)sqlite3_column_text(stmt, 0 );
Check sqlite3_column_type() before calling sqlite3_column_text(). If
it returns SQLITE_NULL then you have NULL.
Pavel
On Wed, Jul 11, 2012 at 1:40 PM, deltagam...@gmx.net
deltagam...@gmx.net wrote:
Am 11.07.2012 19:45, schrieb Pavel Ivanov:
// here maybe NULL is returned ?
mydetails = (char*)sqlite3_column_text(stmt, 0 );
Check sqlite3_column_type() before calling sqlite3_column_text(). If
it returns SQLITE_NULL then you have NULL.
Pavel
On Wed, Jul 11, 2012 at 1:40 PM,
On Wed, Jul 11, 2012 at 2:00 PM, deltagam...@gmx.net
deltagam...@gmx.net wrote:
If mydetails contains a value, and I delete this value with SQLite Database
Browser
it seems not to be a real NULL, has someone an explanation for this
behaviour ?
It depends on your meaning of word delete. But
On 7/11/2012 2:00 PM, deltagam...@gmx.net wrote:
If mydetails contains a value, and I delete this value with SQLite
Database Browser
it seems not to be a real NULL, has someone an explanation for this
behaviour ?
The tool probably sets the field to an empty string, which is not the
same as
