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All fields should be treated as read-only unless explicitly stated otherwise.
struct _pdo_stmt_t {
struct pdo_stmt_methods *methods; void *driver_data;
unsigned executed:1;
unsigned supports_placeholders:2;
int column_count; struct pdo_column_data *columns;
pdo_dbh_t *dbh;
HashTable *bound_params;
HashTable *bound_param_map;
HashTable *bound_columns;
long row_count;
char *query_string;
int query_stringlen;
char *active_query_string;
int active_query_stringlen;
pdo_error_type error_code;
const char *named_rewrite_template;
}; | * | The driver must set this during SKEL_handle_preparer() . |
| ** | This item is for use by the driver; the intended usage is to store a pointer (during SKEL_handle_factory() ) to whatever instance data is required to maintain a connection to the database. |
| *** | This is set by PDO after the statement has been executed for the first time. Your driver can inspect this value to determine if it can skip one-time actions as an optimization. |
| **** | Discussed in more detail in SKEL_handle_preparer. |
| ***** | Your driver is responsible for setting this field to the number of columns available in a result set. This is usually set during SKEL_stmt_execute() but with some database implementations, the column count may not be available until SKEL_stmt_fetch() has been called at least once. Drivers that implement SKEL_stmt_next_rowset() should update the column count when a new rowset is available. |
| ****** |
PDO will allocate this field based on the value that you set for the
column count. You are responsible for populating each column during
SKEL_stmt_describe() . You must set the
|