/*
* cursor_open () -
* return: true on all ok, false otherwise
* cursor_id(out): Cursor identifier
* list_id: List file identifier
* updatable: Flag which indicates if cursor is updatable
* is_oid_included: Flag which indicates if first column of the list file
* contains hidden object identifiers
*
* Note: A cursor is opened to scan through the tuples of the given
* list file. The cursor identifier is initialized and memory
* buffer for the cursor identifier is allocated. If is_oid_included
* flag is set to true, this indicates that the first column
* of list file tuples contains the object identifier to be used
* for cursor update/delete operations.
*/
bool
cursor_open (CURSOR_ID * cursor_id_p, QFILE_LIST_ID * list_id_p,
bool updatable, bool is_oid_included)
{
static QFILE_LIST_ID empty_list_id; /* TODO: remove static empty_list_id */
QFILE_CLEAR_LIST_ID (&empty_list_id);
cursor_id_p->is_updatable = updatable;
cursor_id_p->is_oid_included = is_oid_included;
cursor_id_p->oid_ent_count = 0;
cursor_id_p->oid_set = NULL;
cursor_id_p->mop_set = NULL;
cursor_id_p->position = C_BEFORE;
cursor_id_p->tuple_no = -1;
VPID_SET_NULL (&cursor_id_p->current_vpid);
VPID_SET_NULL (&cursor_id_p->next_vpid);
VPID_SET_NULL (&cursor_id_p->header_vpid);
cursor_id_p->tuple_record.size = 0;
cursor_id_p->tuple_record.tpl = NULL;
cursor_id_p->on_overflow = false;
cursor_id_p->buffer_tuple_count = 0;
cursor_id_p->current_tuple_no = -1;
cursor_id_p->current_tuple_offset = -1;
cursor_id_p->current_tuple_p = NULL;
cursor_id_p->current_tuple_length = -1;
cursor_id_p->oid_col_no = NULL;
cursor_id_p->oid_col_no_cnt = 0;
cursor_id_p->buffer = NULL;
cursor_id_p->buffer_area = NULL;
cursor_id_p->buffer_filled_size = 0;
cursor_id_p->list_id = empty_list_id;
cursor_id_p->prefetch_lock_mode = DB_FETCH_READ;
cursor_id_p->is_copy_tuple_value = true; /* copy */
cursor_initialize_current_tuple_value_position (cursor_id_p);
if (cursor_copy_list_id (&cursor_id_p->list_id, list_id_p) != NO_ERROR)
{
return false;
}
if (cursor_id_p->list_id.type_list.type_cnt)
{
cursor_id_p->buffer_area = (char *) malloc (CURSOR_BUFFER_AREA_SIZE);
cursor_id_p->buffer = cursor_id_p->buffer_area;
if (cursor_id_p->buffer == NULL)
{
return false;
}
if (is_oid_included)
{
cursor_allocate_oid_buffer (cursor_id_p);
}
}
return true;
}
static int
remote_generate_count_star_xasl (THREAD_ENTRY * thread_p, XASL_NODE ** target,
XASL_NODE * src, ACCESS_SPEC_TYPE * spec)
{
int rc = ER_FAILED;
if (src == NULL)
{
return rc;
}
*target = (XASL_NODE *) db_private_alloc (thread_p, sizeof (XASL_NODE));
if ((*target) == NULL)
{
er_set (ER_ERROR_SEVERITY, ARG_FILE_LINE, ER_OUT_OF_VIRTUAL_MEMORY,
1, sizeof (XASL_NODE));
return rc;
}
memcpy (*target, src, sizeof (XASL_NODE));
(*target)->n_oid_list = 0;
(*target)->outptr_list = (*target)->outptr_list;
(*target)->remote_outptr_list = NULL;
(*target)->spec_list = NULL;
(*target)->curr_spec = NULL;
(*target)->scan_ptr = NULL;
(*target)->aptr_list = NULL;
(*target)->next = NULL;
(*target)->after_iscan_list = NULL;
(*target)->ordbynum_flag = 0;
(*target)->ordbynum_pred = NULL;
(*target)->ordbynum_val = NULL;
(*target)->orderby_list = NULL;
(*target)->instnum_pred = NULL;
(*target)->instnum_val = NULL;
(*target)->list_id =
(QFILE_LIST_ID *) db_private_alloc (thread_p, sizeof (QFILE_LIST_ID));
if ((*target)->list_id == NULL)
{
er_set (ER_ERROR_SEVERITY, ARG_FILE_LINE, ER_OUT_OF_VIRTUAL_MEMORY, 1,
sizeof (XASL_NODE));
return rc;
}
QFILE_CLEAR_LIST_ID ((*target)->list_id);
(*target)->spec_list =
(ACCESS_SPEC_TYPE *) db_private_alloc (thread_p,
sizeof (ACCESS_SPEC_TYPE));
if ((*target)->spec_list == NULL)
{
er_set (ER_ERROR_SEVERITY, ARG_FILE_LINE, ER_OUT_OF_VIRTUAL_MEMORY,
1, sizeof (ACCESS_SPEC_TYPE));
return rc;
}
memcpy ((*target)->spec_list, spec, sizeof (ACCESS_SPEC_TYPE));
(*target)->spec_list->s.cls_node.node_id = DB_CLUSTER_NODE_LOCAL;
(*target)->spec_list->next = NULL;
rc = NO_ERROR;
return rc;
}
static int
remote_generate_remote_xasl_by_host (THREAD_ENTRY * thread_p,
XASL_NODE ** target, XASL_NODE * src,
int node_id)
{
int rc = ER_FAILED;
ACCESS_SPEC_TYPE *src_spec = NULL, *tar_spec = NULL, *tmp_spec = NULL;
if (src == NULL)
{
return rc;
}
*target = (XASL_NODE *) db_private_alloc (thread_p, sizeof (XASL_NODE));
if ((*target) == NULL)
{
er_set (ER_ERROR_SEVERITY, ARG_FILE_LINE, ER_OUT_OF_VIRTUAL_MEMORY,
1, sizeof (XASL_NODE));
return rc;
}
memcpy (*target, src, sizeof (XASL_NODE));
(*target)->n_oid_list = 0;
if (src->type == BUILDVALUE_PROC
&& src->proc.buildvalue.agg_list->function == PT_COUNT_STAR)
{
/* nothing */
/* temp code */
}
else
{
(*target)->outptr_list = (*target)->remote_outptr_list;
(*target)->remote_outptr_list = NULL;
}
(*target)->spec_list = NULL;
(*target)->curr_spec = NULL;
(*target)->scan_ptr = NULL;
(*target)->aptr_list = NULL;
(*target)->next = NULL;
(*target)->after_iscan_list = NULL;
(*target)->ordbynum_flag = 0;
(*target)->ordbynum_pred = NULL;
(*target)->ordbynum_val = NULL;
(*target)->orderby_list = NULL;
(*target)->instnum_pred = NULL;
(*target)->instnum_val = NULL;
(*target)->list_id =
(QFILE_LIST_ID *) db_private_alloc (thread_p, sizeof (QFILE_LIST_ID));
if ((*target)->list_id == NULL)
{
er_set (ER_ERROR_SEVERITY, ARG_FILE_LINE, ER_OUT_OF_VIRTUAL_MEMORY, 1,
sizeof (XASL_NODE));
return rc;
}
QFILE_CLEAR_LIST_ID ((*target)->list_id);
src_spec = src->spec_list;
while (src_spec)
{
if (src_spec->s.cls_node.node_id == node_id)
{
tar_spec =
(ACCESS_SPEC_TYPE *) db_private_alloc (thread_p,
sizeof (ACCESS_SPEC_TYPE));
if (tar_spec == NULL)
{
er_set (ER_ERROR_SEVERITY, ARG_FILE_LINE,
ER_OUT_OF_VIRTUAL_MEMORY, 1, sizeof (ACCESS_SPEC_TYPE));
return rc;
}
memcpy (tar_spec, src_spec, sizeof (ACCESS_SPEC_TYPE));
tar_spec->s.cls_node.node_id = DB_CLUSTER_NODE_LOCAL;
tar_spec->next = NULL;
if (!(*target)->spec_list)
{
(*target)->spec_list = tar_spec;
}
else
{
tmp_spec = (*target)->spec_list;
while (tmp_spec->next)
{
tmp_spec = tmp_spec->next;
}
tmp_spec->next = tar_spec;
}
XASL_SET_FLAG (src_spec, XASL_SPEC_VISITED);
}
src_spec = src_spec->next;
}
if ((*target)->type == BUILDVALUE_PROC)
{
BUILDLIST_PROC_NODE *bl_proc = &((*target)->proc.buildlist);
(*target)->type = BUILDLIST_PROC;
memset (bl_proc, 0, sizeof (BUILDLIST_PROC_NODE));
}
rc = NO_ERROR;
return rc;
}
DB_QUERY_RESULT *
pt_new_query_result_descriptor (PARSER_CONTEXT * parser, PT_NODE * query)
{
int degree;
DB_QUERY_RESULT *r = NULL;
QFILE_LIST_ID *list_id;
int oids_included = 0;
bool failure = false;
if (query == NULL)
{
return NULL;
}
switch (query->node_type)
{
default:
return NULL;
break;
case PT_EXECUTE_PREPARE:
if (query->info.execute.stmt_type != CUBRID_STMT_SELECT)
{
return NULL;
}
oids_included = query->info.execute.oids_included;
degree = query->info.execute.column_count;
break;
case PT_INSERT:
oids_included = 0;
degree = 1;
break;
case PT_DIFFERENCE:
case PT_INTERSECTION:
case PT_UNION:
case PT_SELECT:
oids_included = query->info.query.oids_included;
degree = 0;
degree = pt_length_of_select_list (pt_get_select_list (parser, query), EXCLUDE_HIDDEN_COLUMNS);
break;
}
r = db_alloc_query_result (T_SELECT, degree);
if (r == NULL)
{
return NULL;
}
db_init_query_result (r, T_SELECT);
r->type = T_SELECT;
r->col_cnt = degree;
r->oid_included = oids_included == 1;
r->res.s.query_id = parser->query_id;
r->res.s.stmt_id = 0;
r->res.s.stmt_type = CUBRID_STMT_SELECT;
r->res.s.cache_time = query->cache_time;
/* the following is for clean up when the query fails */
memset (&r->res.s.cursor_id.list_id, 0, sizeof (QFILE_LIST_ID));
r->res.s.cursor_id.query_id = parser->query_id;
r->res.s.cursor_id.buffer = NULL;
r->res.s.cursor_id.tuple_record.tpl = NULL;
r->res.s.holdable = parser->is_holdable;
list_id = (QFILE_LIST_ID *) query->etc;
r->type_cnt = degree;
if (list_id)
{
failure = !cursor_open (&r->res.s.cursor_id, list_id, false, r->oid_included);
/* free result, which was copied by open cursor operation! */
regu_free_listid (list_id);
}
else
{
QFILE_LIST_ID empty_list_id;
QFILE_CLEAR_LIST_ID (&empty_list_id);
failure = !cursor_open (&r->res.s.cursor_id, &empty_list_id, false, r->oid_included);
}
if (failure)
{
db_free_query_result (r);
r = NULL;
}
return r;
}
