/********************************************************************//**
Creates a row undo node to a query graph.
@return own: undo node */
UNIV_INTERN
undo_node_t*
row_undo_node_create(
/*=================*/
trx_t* trx, /*!< in: transaction */
que_thr_t* parent, /*!< in: parent node, i.e., a thr node */
mem_heap_t* heap) /*!< in: memory heap where created */
{
undo_node_t* undo;
ut_ad(trx && parent && heap);
undo = mem_heap_alloc(heap, sizeof(undo_node_t));
undo->common.type = QUE_NODE_UNDO;
undo->common.parent = parent;
undo->state = UNDO_NODE_FETCH_NEXT;
undo->trx = trx;
btr_pcur_init(&(undo->pcur));
undo->heap = mem_heap_create(256);
return(undo);
}
/**************************************************************//**
Allocates memory for a persistent cursor object and initializes the cursor.
@return own: persistent cursor */
UNIV_INTERN
btr_pcur_t*
btr_pcur_create_for_mysql(void)
/*============================*/
{
btr_pcur_t* pcur;
pcur = mem_alloc(sizeof(btr_pcur_t));
pcur->btr_cur.index = NULL;
btr_pcur_init(pcur);
return(pcur);
}
btr_pcur_t*
btr_pcur_create_for_mysql(void)
/*============================*/
/* out, own: persistent cursor */
{
btr_pcur_t* pcur;
pcur = mem_alloc(sizeof(btr_pcur_t));
pcur->btr_cur.index = NULL;
btr_pcur_init(pcur);
return(pcur);
}
