que0que.ic File Reference

Query graph. More...

#include "usr0sess.h"

Functions
static trx_t *	thr_get_trx (que_thr_t *thr)
	Gets the trx of a query thread. More...
static bool	thr_is_recv (const que_thr_t *thr)
	Determines if this thread is rolling back an incomplete transaction in crash recovery. More...
static que_thr_t *	que_fork_get_first_thr (que_fork_t *fork)
	Gets the first thr in a fork. More...
static que_node_t *	que_fork_get_child (que_fork_t *fork)
	Gets the child node of the first thr in a fork. More...
static ulint	que_node_get_type (const que_node_t *node)
	Gets the type of a graph node. More...
static dfield_t *	que_node_get_val (que_node_t *node)
	Gets pointer to the value dfield of a graph node. More...
static ulint	que_node_get_val_buf_size (que_node_t *node)
	Gets the value buffer size of a graph node. More...
static void	que_node_set_val_buf_size (que_node_t *node, ulint size)
	Sets the value buffer size of a graph node. More...
static void	que_node_set_parent (que_node_t *node, que_node_t *parent)
	Sets the parent of a graph node. More...
static dtype_t *	que_node_get_data_type (que_node_t *node)
	Gets pointer to the value data type field of a graph node. More...
static que_node_t *	que_node_list_add_last (que_node_t *node_list, que_node_t *node)
	Catenates a query graph node to a list of them, possible empty list. More...
static que_node_t *	que_node_list_get_last (que_node_t *node_list)
static que_node_t *	que_node_get_next (que_node_t *node)
	Gets the next list node in a list of query graph nodes. More...
static ulint	que_node_list_get_len (que_node_t *node_list)
	Gets a query graph node list length. More...
static que_node_t *	que_node_get_parent (que_node_t *node)
	Gets the parent node of a query graph node. More...
static bool	que_thr_peek_stop (que_thr_t *thr)
	Checks if graph, trx, or session is in a state where the query thread should be stopped. More...
static bool	que_graph_is_select (que_t *graph)
	Returns true if the query graph is for a SELECT statement. More...

Detailed Description

Query graph.

Created 5/27/1996 Heikki Tuuri

Function Documentation

que_fork_get_child()

static que_node_t * que_fork_get_child ( que_fork_t *  fork )

inlinestatic

Gets the child node of the first thr in a fork.

Parameters

fork	in: query fork

que_fork_get_first_thr()

static que_thr_t * que_fork_get_first_thr ( que_fork_t *  fork )

inlinestatic

Gets the first thr in a fork.

Parameters

fork	in: query fork

que_graph_is_select()

static bool que_graph_is_select ( que_t *  graph )

inlinestatic

Returns true if the query graph is for a SELECT statement.

Returns

true if a select

Parameters

graph

in: graph

que_node_get_data_type()

static dtype_t * que_node_get_data_type ( que_node_t *  node )

inlinestatic

Gets pointer to the value data type field of a graph node.

Parameters

node	in: graph node

que_node_get_next()

static que_node_t * que_node_get_next ( que_node_t *  node )

inlinestatic

Gets the next list node in a list of query graph nodes.

Returns

next node in a list of nodes

Parameters

node	in: node in a list

que_node_get_parent()

static que_node_t * que_node_get_parent ( que_node_t *  node )

inlinestatic

Gets the parent node of a query graph node.

Returns

parent node or NULL

Parameters

node

in: node

que_node_get_type()

static ulint que_node_get_type ( const que_node_t *  node )

inlinestatic

Gets the type of a graph node.

Parameters

node	in: graph node

que_node_get_val()

static dfield_t * que_node_get_val ( que_node_t *  node )

inlinestatic

Gets pointer to the value dfield of a graph node.

Parameters

node	in: graph node

que_node_get_val_buf_size()

static ulint que_node_get_val_buf_size ( que_node_t *  node )

inlinestatic

Gets the value buffer size of a graph node.

Returns

val buffer size, not defined if val.data == NULL in node

Parameters

node	in: graph node

que_node_list_add_last()

static que_node_t * que_node_list_add_last ( que_node_t *  node_list, que_node_t *  node  )

inlinestatic

Catenates a query graph node to a list of them, possible empty list.

Returns

one-way list of nodes

Parameters

node_list	in: node list, or NULL
node	in: node

que_node_list_get_last()

static que_node_t * que_node_list_get_last ( que_node_t *  node_list )

inlinestatic

que_node_list_get_len()

static ulint que_node_list_get_len ( que_node_t *  node_list )

inlinestatic

Gets a query graph node list length.

Returns

length, for NULL list 0

Parameters

node_list

in: node list, or NULL

que_node_set_parent()

static void que_node_set_parent ( que_node_t *  node, que_node_t *  parent  )

inlinestatic

Sets the parent of a graph node.

Parameters

node	in: graph node
parent	in: parent

que_node_set_val_buf_size()

static void que_node_set_val_buf_size ( que_node_t *  node, ulint  size  )

inlinestatic

Sets the value buffer size of a graph node.

Parameters

node	in: graph node
size	in: size

que_thr_peek_stop()

static bool que_thr_peek_stop ( que_thr_t *  thr )

inlinestatic

Checks if graph, trx, or session is in a state where the query thread should be stopped.

Returns

true if should be stopped; NOTE that if the peek is made without reserving the trx mutex, then another peek with the mutex reserved is necessary before deciding the actual stopping

Parameters

thr	in: query thread

thr_get_trx()

static trx_t * thr_get_trx ( que_thr_t *  thr )

inlinestatic

Gets the trx of a query thread.

Parameters

thr	in: query thread

thr_is_recv()

static bool thr_is_recv ( const que_thr_t *  thr )

inlinestatic

Determines if this thread is rolling back an incomplete transaction in crash recovery.

Returns

true if thr is rolling back an incomplete transaction in crash recovery

Parameters

thr	in: query thread