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This document uses PHP Chinese website manual Release
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
|