sqlite3_data_count
—
Number of columns in a result set
int
sqlite3_data_count
(sqlite3_stmt
*pStmt);
The sqlite3_data_count(P) interface returns the number of columns in the current
row of the result set of prepared statement P. If prepared statement P does
not have results ready to return (via calls to the sqlite3_column_*() of
interfaces) then sqlite3_data_count(P) returns 0. The sqlite3_data_count(P)
routine also returns 0 if P is a NULL pointer. The sqlite3_data_count(P)
routine returns 0 if the previous call to sqlite3_step(P) returned
SQLITE_DONE. The sqlite3_data_count(P) will return non-zero if previous call
to sqlite3_step(P) returned SQLITE_ROW, except in the case of the PRAGMA
incremental_vacuum where it always returns zero since each step of that
multi-step pragma returns 0 columns of data.