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CONC-348: Add callback support for prepared statements

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Client application can now register callback functions for either sending or retrieving data:
- typedef void (*ps_result_callback)(MYSQL_STMT *stmt, unsigned int column, unsigned char **row);
- typedef my_bool *(*ps_param_callback)(MYSQL_STMT *stmt, MYSQL_BIND *bind, unsigned int row_nr);

These functions will be registerd via mysql_stmt_attr_set call by specifying options STMT_ATTR_CB_PARAM
or STMT_ATTR_CB_RESULT.
This commit is contained in:
Georg Richter
2018-12-03 13:04:16 +01:00
parent 1888c141f7
commit e9b3aef20f
2 changed files with 49 additions and 13 deletions
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12
include/mariadb_stmt.h
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@@ -62,10 +62,15 @@ enum enum_stmt_attr_type
STMT_ATTR_UPDATE_MAX_LENGTH,
STMT_ATTR_CURSOR_TYPE,
STMT_ATTR_PREFETCH_ROWS,
/* MariaDB only */
STMT_ATTR_PREBIND_PARAMS=200,
STMT_ATTR_ARRAY_SIZE,
STMT_ATTR_ROW_SIZE,
STMT_ATTR_STATE
STMT_ATTR_STATE,
STMT_ATTR_CB_USER_DATA,
STMT_ATTR_CB_PARAM,
STMT_ATTR_CB_RESULT
};
enum enum_cursor_type
@@ -195,6 +200,8 @@ struct st_mysqlnd_stmt_methods
};
typedef int (*mysql_stmt_fetch_row_func)(MYSQL_STMT *stmt, unsigned char **row);
typedef void (*ps_result_callback)(MYSQL_STMT *stmt, unsigned int column, unsigned char **row);
typedef my_bool *(*ps_param_callback)(MYSQL_STMT *stmt, MYSQL_BIND *bind, unsigned int row_nr);
struct st_mysql_stmt
{
@@ -234,6 +241,9 @@ struct st_mysql_stmt
unsigned int array_size;
size_t row_size;
unsigned int prebind_params;
void *user_data;
ps_result_callback result_callback;
ps_param_callback param_callback;
};
typedef void (*ps_field_fetch_func)(MYSQL_BIND *r_param, const MYSQL_FIELD * field, unsigned char **row);