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mysql_stmt_attr_get(3) MariaDB Connector/C mysql_stmt_attr_get(3)

Name

mysql_stmt_attr_get - Gets the current value of a statement attribute

Synopsis

#include <mysql.h>
my_bool mysql_stmt_attr_get(MYSQL_STMT * stmt,


                            enum enum_stmt_attr_type,


                            void * attr);

Description

Gets the current value of a statement attribute. Returns zero on success, non zero on failure.

Parameter

•
stmt - a statement handle, which was previously allocated by mysql_stmt_init(3).
•
enum_stmt_attr_type - attribute. See below.
•
attr - pointer to a variable, which will contain the attribute value.

Attribute types

The enum_stmt_attr_type parameter has the following possible values:

Value Type Description
STMT_ATTR_UPDATE_MAX_LENGTH my_bool * Indicates if mysql_stmt_store_result(3) will update the max_length value of MYSQL_FIELD structures.
STMT_ATTR_CURSOR_TYPE unsigned long * Possible values are CURSOR_TYPE_READ_ONLY or default value CURSOR_TYPE_NO_CURSOR.
STMT_ATTR_PREFETCH_ROWS unsigned long * Number of rows which will be prefetched. The default value is 1.
STMT_ATTR_PREBIND_PARAMS unsigned int * Number of parameters used for mariadb_stmt_execute_direct(3)
STMT_ATTR_STATE enum mysql_stmt_state * Status of prepared statement. Possible values are defined in enum mysql_stmt_state. This option was added in MariaDB Connector/C 3.1.0

Notes

•
Setting the number of prefetched rows will work only for read only cursors.

See Also

•
mysql_stmt_attr_set(3)
Version 3.2.2