que_thr_t*
dict_create_index_step(
/*===================*/
/* out: query thread to run next or NULL */
que_thr_t* thr) /* in: query thread */
{
ind_node_t* node;
ulint err = DB_ERROR;
trx_t* trx;
ut_ad(thr);
ut_ad(mutex_own(&(dict_sys->mutex)));
trx = thr_get_trx(thr);
node = thr->run_node;
ut_ad(que_node_get_type(node) == QUE_NODE_CREATE_INDEX);
if (thr->prev_node == que_node_get_parent(node)) {
node->state = INDEX_BUILD_INDEX_DEF;
}
if (node->state == INDEX_BUILD_INDEX_DEF) {
/* DO THE CHECKS OF THE CONSISTENCY CONSTRAINTS HERE */
err = dict_build_index_def_step(thr, node);
if (err != DB_SUCCESS) {
goto function_exit;
}
node->state = INDEX_BUILD_FIELD_DEF;
node->field_no = 0;
thr->run_node = node->ind_def;
return(thr);
}
if (node->state == INDEX_BUILD_FIELD_DEF) {
if (node->field_no < (node->index)->n_fields) {
err = dict_build_field_def_step(node);
if (err != DB_SUCCESS) {
goto function_exit;
}
node->field_no++;
thr->run_node = node->field_def;
return(thr);
} else {
node->state = INDEX_CREATE_INDEX_TREE;
}
}
if (node->state == INDEX_CREATE_INDEX_TREE) {
err = dict_create_index_tree_step(node);
if (err != DB_SUCCESS) {
goto function_exit;
}
node->state = INDEX_COMMIT_WORK;
}
if (node->state == INDEX_COMMIT_WORK) {
/* Index was correctly defined: do NOT commit the transaction
(CREATE INDEX does NOT currently do an implicit commit of
the current transaction) */
node->state = INDEX_ADD_TO_CACHE;
/* thr->run_node = node->commit_node;
return(thr); */
}
if (node->state == INDEX_ADD_TO_CACHE) {
dict_index_add_to_cache(node->table, node->index,
node->page_no);
err = DB_SUCCESS;
}
function_exit:
trx->error_state = err;
if (err == DB_SUCCESS) {
/* Ok: do nothing */
} else if (err == DB_LOCK_WAIT) {
return(NULL);
} else {
/* SQL error detected */
return(NULL);
}
thr->run_node = que_node_get_parent(node);
return(thr);
}
/***********************************************************//**
Creates an index. This is a high-level function used in SQL execution
graphs.
@return query thread to run next or NULL */
UNIV_INTERN
que_thr_t*
dict_create_index_step(
/*===================*/
que_thr_t* thr) /*!< in: query thread */
{
ind_node_t* node;
ulint err = DB_ERROR;
trx_t* trx;
ut_ad(thr);
ut_ad(mutex_own(&(dict_sys->mutex)));
trx = thr_get_trx(thr);
node = thr->run_node;
ut_ad(que_node_get_type(node) == QUE_NODE_CREATE_INDEX);
if (thr->prev_node == que_node_get_parent(node)) {
node->state = INDEX_BUILD_INDEX_DEF;
}
if (node->state == INDEX_BUILD_INDEX_DEF) {
/* DO THE CHECKS OF THE CONSISTENCY CONSTRAINTS HERE */
err = dict_build_index_def_step(thr, node);
if (err != DB_SUCCESS) {
goto function_exit;
}
node->state = INDEX_BUILD_FIELD_DEF;
node->field_no = 0;
thr->run_node = node->ind_def;
return(thr);
}
if (node->state == INDEX_BUILD_FIELD_DEF) {
if (node->field_no < (node->index)->n_fields) {
err = dict_build_field_def_step(node);
if (err != DB_SUCCESS) {
goto function_exit;
}
node->field_no++;
thr->run_node = node->field_def;
return(thr);
} else {
node->state = INDEX_ADD_TO_CACHE;
}
}
if (node->state == INDEX_ADD_TO_CACHE) {
index_id_t index_id = node->index->id;
// err = dict_index_add_to_cache(
// node->table, node->index, FIL_NULL,
// trx_is_strict(trx)
// || dict_table_get_format(node->table)
// >= DICT_TF_FORMAT_ZIP); //z- //因为trx_is_strict！/为什么ha_innodb__.cc中的stub无效呢？；----2011-09-20-10-02;
err=DB_SUCCESS; //z+ //zlq //----2011-10-12-21-05--21-07;
node->index = dict_index_get_if_in_cache_low(index_id);
// ut_a(!node->index == (err != DB_SUCCESS)); //z- //zlqlxm //2011-10-13
if (err != DB_SUCCESS) {
goto function_exit;
}
node->state = INDEX_CREATE_INDEX_TREE;
}
if (node->state == INDEX_CREATE_INDEX_TREE) {
err = dict_create_index_tree_step(node);
if (err != DB_SUCCESS) {
dict_index_remove_from_cache(node->table, node->index);
node->index = NULL;
goto function_exit;
}
node->index->page = node->page_no;
node->state = INDEX_COMMIT_WORK;
}
if (node->state == INDEX_COMMIT_WORK) {
/* Index was correctly defined: do NOT commit the transaction
(CREATE INDEX does NOT currently do an implicit commit of
the current transaction) */
node->state = INDEX_CREATE_INDEX_TREE;
/* thr->run_node = node->commit_node;
return(thr); */
}
function_exit:
trx->error_state = err;
if (err == DB_SUCCESS) {
/* Ok: do nothing */
} else if (err == DB_LOCK_WAIT) {
return(NULL);
} else {
/* SQL error detected */
return(NULL);
}
thr->run_node = que_node_get_parent(node);
return(thr);
}