/*****************************************************************//**
Initializes the data dictionary memory structures when the database is
started. This function is also called when the data dictionary is created. */
UNIV_INTERN
void
dict_boot(void)
/*===========*/
{
dict_table_t* table;
dict_index_t* index;
dict_hdr_t* dict_hdr;
mem_heap_t* heap;
mtr_t mtr;
ulint error;
mtr_start(&mtr);
/* Create the hash tables etc. */
dict_init();
heap = mem_heap_create(450);
mutex_enter(&(dict_sys->mutex));
/* Get the dictionary header */
dict_hdr = dict_hdr_get(&mtr);
/* Because we only write new row ids to disk-based data structure
(dictionary header) when it is divisible by
DICT_HDR_ROW_ID_WRITE_MARGIN, in recovery we will not recover
the latest value of the row id counter. Therefore we advance
the counter at the database startup to avoid overlapping values.
Note that when a user after database startup first time asks for
a new row id, then because the counter is now divisible by
..._MARGIN, it will immediately be updated to the disk-based
header. */
dict_sys->row_id = ut_dulint_add(
ut_dulint_align_up(mtr_read_dulint(dict_hdr + DICT_HDR_ROW_ID,
&mtr),
DICT_HDR_ROW_ID_WRITE_MARGIN),
DICT_HDR_ROW_ID_WRITE_MARGIN);
/* Insert into the dictionary cache the descriptions of the basic
system tables */
/*-------------------------*/
table = dict_mem_table_create("SYS_TABLES", DICT_HDR_SPACE, 8, 0);
dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "ID", DATA_BINARY, 0, 0);
/* ROW_FORMAT = (N_COLS >> 31) ? COMPACT : REDUNDANT */
dict_mem_table_add_col(table, heap, "N_COLS", DATA_INT, 0, 4);
/* TYPE is either DICT_TABLE_ORDINARY, or (TYPE & DICT_TF_COMPACT)
and (TYPE & DICT_TF_FORMAT_MASK) are nonzero and TYPE = table->flags */
dict_mem_table_add_col(table, heap, "TYPE", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "MIX_ID", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "MIX_LEN", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "CLUSTER_NAME", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "SPACE", DATA_INT, 0, 4);
table->id = DICT_TABLES_ID;
dict_table_add_to_cache(table, heap);
dict_sys->sys_tables = table;
mem_heap_empty(heap);
index = dict_mem_index_create("SYS_TABLES", "CLUST_IND",
DICT_HDR_SPACE,
DICT_UNIQUE | DICT_CLUSTERED, 1);
dict_mem_index_add_field(index, "NAME", 0);
index->id = DICT_TABLES_ID;
error = dict_index_add_to_cache(table, index,
mtr_read_ulint(dict_hdr
+ DICT_HDR_TABLES,
MLOG_4BYTES, &mtr),
FALSE);
ut_a(error == DB_SUCCESS);
/*-------------------------*/
index = dict_mem_index_create("SYS_TABLES", "ID_IND",
DICT_HDR_SPACE, DICT_UNIQUE, 1);
dict_mem_index_add_field(index, "ID", 0);
index->id = DICT_TABLE_IDS_ID;
error = dict_index_add_to_cache(table, index,
mtr_read_ulint(dict_hdr
+ DICT_HDR_TABLE_IDS,
MLOG_4BYTES, &mtr),
FALSE);
ut_a(error == DB_SUCCESS);
/*-------------------------*/
table = dict_mem_table_create("SYS_COLUMNS", DICT_HDR_SPACE, 7, 0);
dict_mem_table_add_col(table, heap, "TABLE_ID", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "POS", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "MTYPE", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "PRTYPE", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "LEN", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "PREC", DATA_INT, 0, 4);
table->id = DICT_COLUMNS_ID;
dict_table_add_to_cache(table, heap);
dict_sys->sys_columns = table;
mem_heap_empty(heap);
index = dict_mem_index_create("SYS_COLUMNS", "CLUST_IND",
DICT_HDR_SPACE,
DICT_UNIQUE | DICT_CLUSTERED, 2);
dict_mem_index_add_field(index, "TABLE_ID", 0);
dict_mem_index_add_field(index, "POS", 0);
index->id = DICT_COLUMNS_ID;
error = dict_index_add_to_cache(table, index,
mtr_read_ulint(dict_hdr
+ DICT_HDR_COLUMNS,
MLOG_4BYTES, &mtr),
FALSE);
ut_a(error == DB_SUCCESS);
/*-------------------------*/
table = dict_mem_table_create("SYS_INDEXES", DICT_HDR_SPACE, 7, 0);
dict_mem_table_add_col(table, heap, "TABLE_ID", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "ID", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "N_FIELDS", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "TYPE", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "SPACE", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "PAGE_NO", DATA_INT, 0, 4);
/* The '+ 2' below comes from the 2 system fields */
#if DICT_SYS_INDEXES_PAGE_NO_FIELD != 6 + 2
#error "DICT_SYS_INDEXES_PAGE_NO_FIELD != 6 + 2"
#endif
#if DICT_SYS_INDEXES_SPACE_NO_FIELD != 5 + 2
#error "DICT_SYS_INDEXES_SPACE_NO_FIELD != 5 + 2"
#endif
#if DICT_SYS_INDEXES_TYPE_FIELD != 4 + 2
#error "DICT_SYS_INDEXES_TYPE_FIELD != 4 + 2"
#endif
table->id = DICT_INDEXES_ID;
dict_table_add_to_cache(table, heap);
dict_sys->sys_indexes = table;
mem_heap_empty(heap);
index = dict_mem_index_create("SYS_INDEXES", "CLUST_IND",
DICT_HDR_SPACE,
DICT_UNIQUE | DICT_CLUSTERED, 2);
dict_mem_index_add_field(index, "TABLE_ID", 0);
dict_mem_index_add_field(index, "ID", 0);
index->id = DICT_INDEXES_ID;
error = dict_index_add_to_cache(table, index,
mtr_read_ulint(dict_hdr
+ DICT_HDR_INDEXES,
MLOG_4BYTES, &mtr),
FALSE);
ut_a(error == DB_SUCCESS);
/*-------------------------*/
table = dict_mem_table_create("SYS_FIELDS", DICT_HDR_SPACE, 3, 0);
dict_mem_table_add_col(table, heap, "INDEX_ID", DATA_BINARY, 0, 0);
dict_mem_table_add_col(table, heap, "POS", DATA_INT, 0, 4);
dict_mem_table_add_col(table, heap, "COL_NAME", DATA_BINARY, 0, 0);
table->id = DICT_FIELDS_ID;
dict_table_add_to_cache(table, heap);
dict_sys->sys_fields = table;
mem_heap_free(heap);
index = dict_mem_index_create("SYS_FIELDS", "CLUST_IND",
DICT_HDR_SPACE,
DICT_UNIQUE | DICT_CLUSTERED, 2);
dict_mem_index_add_field(index, "INDEX_ID", 0);
dict_mem_index_add_field(index, "POS", 0);
index->id = DICT_FIELDS_ID;
error = dict_index_add_to_cache(table, index,
mtr_read_ulint(dict_hdr
+ DICT_HDR_FIELDS,
MLOG_4BYTES, &mtr),
FALSE);
ut_a(error == DB_SUCCESS);
mtr_commit(&mtr);
/*-------------------------*/
/* Initialize the insert buffer table and index for each tablespace */
ibuf_init_at_db_start();
/* Load definitions of other indexes on system tables */
dict_load_sys_table(dict_sys->sys_tables);
dict_load_sys_table(dict_sys->sys_columns);
dict_load_sys_table(dict_sys->sys_indexes);
dict_load_sys_table(dict_sys->sys_fields);
mutex_exit(&(dict_sys->mutex));
}
que_thr_t*
dict_create_table_step(
/*===================*/
/* out: query thread to run next or NULL */
que_thr_t* thr) /* in: query thread */
{
tab_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_TABLE);
if (thr->prev_node == que_node_get_parent(node)) {
node->state = TABLE_BUILD_TABLE_DEF;
}
if (node->state == TABLE_BUILD_TABLE_DEF) {
/* DO THE CHECKS OF THE CONSISTENCY CONSTRAINTS HERE */
err = dict_build_table_def_step(thr, node);
if (err != DB_SUCCESS) {
goto function_exit;
}
node->state = TABLE_BUILD_COL_DEF;
node->col_no = 0;
thr->run_node = node->tab_def;
return(thr);
}
if (node->state == TABLE_BUILD_COL_DEF) {
if (node->col_no < (node->table)->n_def) {
err = dict_build_col_def_step(node);
if (err != DB_SUCCESS) {
goto function_exit;
}
node->col_no++;
thr->run_node = node->col_def;
return(thr);
} else {
node->state = TABLE_COMMIT_WORK;
}
}
if (node->state == TABLE_COMMIT_WORK) {
/* Table was correctly defined: do NOT commit the transaction
(CREATE TABLE does NOT do an implicit commit of the current
transaction) */
node->state = TABLE_ADD_TO_CACHE;
/* thr->run_node = node->commit_node;
return(thr); */
}
if (node->state == TABLE_ADD_TO_CACHE) {
dict_table_add_to_cache(node->table, node->heap);
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);
}
dict_table_t*
dict_load_table(
/*============*/
/* out: table, NULL if does not exist */
char* name) /* in: table name */
{
dict_table_t* table;
dict_table_t* sys_tables;
btr_pcur_t pcur;
dict_index_t* sys_index;
dtuple_t* tuple;
mem_heap_t* heap;
dfield_t* dfield;
rec_t* rec;
byte* field;
ulint len;
char* buf;
ulint space;
ulint n_cols;
mtr_t mtr;
ut_ad(mutex_own(&(dict_sys->mutex)));
heap = mem_heap_create(1000);
mtr_start(&mtr);
sys_tables = dict_table_get_low("SYS_TABLES");
sys_index = UT_LIST_GET_FIRST(sys_tables->indexes);
tuple = dtuple_create(heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
dfield_set_data(dfield, name, ut_strlen(name));
dict_index_copy_types(tuple, sys_index, 1);
btr_pcur_open_on_user_rec(sys_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
rec = btr_pcur_get_rec(&pcur);
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)
|| rec_get_deleted_flag(rec)) {
/* Not found */
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(NULL);
}
field = rec_get_nth_field(rec, 0, &len);
/* Check if the table name in record is the searched one */
if (len != ut_strlen(name) || ut_memcmp(name, field, len) != 0) {
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(NULL);
}
ut_a(0 == ut_strcmp("SPACE",
dict_field_get_col(
dict_index_get_nth_field(
dict_table_get_first_index(sys_tables), 9))->name));
field = rec_get_nth_field(rec, 9, &len);
space = mach_read_from_4(field);
ut_a(0 == ut_strcmp("N_COLS",
dict_field_get_col(
dict_index_get_nth_field(
dict_table_get_first_index(sys_tables), 4))->name));
field = rec_get_nth_field(rec, 4, &len);
n_cols = mach_read_from_4(field);
table = dict_mem_table_create(name, space, n_cols);
ut_a(0 == ut_strcmp("ID",
dict_field_get_col(
dict_index_get_nth_field(
dict_table_get_first_index(sys_tables), 3))->name));
field = rec_get_nth_field(rec, 3, &len);
table->id = mach_read_from_8(field);
field = rec_get_nth_field(rec, 5, &len);
table->type = mach_read_from_4(field);
if (table->type == DICT_TABLE_CLUSTER_MEMBER) {
ut_a(0);
field = rec_get_nth_field(rec, 6, &len);
table->mix_id = mach_read_from_8(field);
field = rec_get_nth_field(rec, 8, &len);
buf = mem_heap_alloc(heap, len);
ut_memcpy(buf, field, len);
table->cluster_name = buf;
}
if ((table->type == DICT_TABLE_CLUSTER)
|| (table->type == DICT_TABLE_CLUSTER_MEMBER)) {
field = rec_get_nth_field(rec, 7, &len);
table->mix_len = mach_read_from_4(field);
}
btr_pcur_close(&pcur);
mtr_commit(&mtr);
if (table->type == DICT_TABLE_CLUSTER_MEMBER) {
/* Load the cluster table definition if not yet in
memory cache */
dict_table_get_low(table->cluster_name);
}
dict_load_columns(table, heap);
dict_table_add_to_cache(table);
dict_load_indexes(table, heap);
ut_a(DB_SUCCESS == dict_load_foreigns(table->name));
mem_heap_free(heap);
return(table);
}
