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sqlanalyze.c
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/*
Copyright 2015 Bloomberg Finance L.P.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include <comdb2.h>
#include <strings.h>
#include <assert.h>
#include <limits.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <inttypes.h>
#include <pthread.h>
#include <unistd.h>
#include <epochlib.h>
#include "analyze.h"
#include "sql.h"
#include <sqliteInt.h>
#include "block_internal.h"
#include <thread_malloc.h>
#include <autoanalyze.h>
#include <bdb_schemachange.h>
#include <sqlstat1.h>
#include <sqloffload.h>
#include <comdb2_atomic.h>
#include <ctrace.h>
#include <logmsg.h>
#include "str0.h"
#include "sc_util.h"
#include "debug_switches.h"
#include "views.h"
#include "sqlanalyze.h"
/* amount of thread-memory initialized for this thread */
#ifndef PER_THREAD_MALLOC
static int analyze_thread_memory = 1048576;
#endif
int gbl_debug_sleep_on_analyze = 0;
extern void reset_aa_counter(char *tblname);
/* global is-running flag */
uint32_t analyze_running_flag = 0;
static int analyze_abort_requested = 0;
/* global enable / disable switch */
static int sampled_tables_enabled = 1;
/* sampling threshold defaults to 100 Mb */
long long sampling_threshold = 104857600;
/* hard-maximum number of analyze-table threads */
static int analyze_hard_max_table_threads = 15;
/* maximum number of analyze-table threads */
int analyze_max_table_threads = 5;
/* current number of analyze-sampling threads */
static int analyze_cur_table_threads = 0;
/* maximum number of analyze-sampling threads */
static int analyze_hard_max_comp_threads = 40;
/* maximum number of analyze-sampling threads */
int analyze_max_comp_threads = 10;
/* current number of analyze-sampling threads */
static int analyze_cur_comp_threads = 0;
/* table-thread mutex */
static pthread_mutex_t table_thd_mutex = PTHREAD_MUTEX_INITIALIZER;
/* table-thread cond */
static pthread_cond_t table_thd_cond = PTHREAD_COND_INITIALIZER;
/* comp-thread mutex */
static pthread_mutex_t comp_thd_mutex = PTHREAD_MUTEX_INITIALIZER;
/* comp-thread cond */
static pthread_cond_t comp_thd_cond = PTHREAD_COND_INITIALIZER;
/* comp-state enum */
enum {
SAMPLING_NOTINITED = 0,
SAMPLING_STARTUP = 1,
SAMPLING_RUNNING = 2,
SAMPLING_COMPLETE = 3,
SAMPLING_ERROR = 4
};
/* table-state enum */
enum {
TABLE_NOTINITED = 0,
TABLE_STARTUP = 1,
TABLE_RUNNING = 2,
TABLE_COMPLETE = 3,
TABLE_FAILED = 4,
TABLE_SKIPPED = 5
};
int analyze_partition(table_descriptor_t *td, struct sqlclntstate *clnt, char *zErrTab, size_t nErrTab);
/* loadStat4 (analyze.c) will ignore all stat entries
* which have "tbl like 'cdb2.%' */
int backout_stats_frm_tbl(struct sqlclntstate *clnt, const char *table,
int stattbl)
{
char *sql = NULL;
sql = sqlite3_mprintf(
"delete from sqlite_stat%d where tbl='%q' and exists (select tbl from "
"sqlite_stat%d where tbl='cdb2.%q.sav')",
stattbl, table, stattbl, table);
assert(sql != NULL);
int rc = run_internal_sql_clnt(clnt, sql);
sqlite3_free(sql); sql = NULL;
if (rc)
return rc;
sql = sqlite3_mprintf(
"update sqlite_stat%d set tbl='%q' where tbl='cdb2.%q.sav'",
stattbl, table, table);
assert(sql != NULL);
rc = run_internal_sql_clnt(clnt, sql);
sqlite3_free(sql); sql = NULL;
return rc;
}
/* Create an sql machine & run an analyze command. */
static int run_sql_part_trans(sqlite3 *sqldb, struct sqlclntstate *client,
char *sql, int *changes)
{
int rc;
char *msg;
/* set sql and analyze flavor */
client->sql = sql;
/* set thread info */
struct sql_thread *thd = pthread_getspecific(query_info_key);
sql_get_query_id(thd);
/* run sql */
rc = sqlite3_exec(sqldb, sql, NULL, NULL, &msg);
if (rc) {
logmsg(LOGMSG_ERROR, "Analyze failure rc %d: %s\n", rc,
msg ? msg : "<unknown error>");
return rc;
}
if (changes != NULL)
*changes = sqlite3_changes(sqldb);
return rc;
}
static int check_stat1_and_flag(SBUF2 *sb)
{
/* verify sqlite_stat1 */
if (NULL == get_dbtable_by_name("sqlite_stat1")) {
sbuf2printf(sb, "?%s: analyze requires sqlite_stat1 to run\n",
__func__);
sbuf2printf(sb, "FAILED\n");
logmsg(LOGMSG_ERROR, "%s: analyze requires sqlite_stat1 to run\n", __func__);
return -1;
}
/* check if its already running */
if (analyze_running_flag) {
sbuf2printf(sb, "?%s: analyze is already running\n", __func__);
sbuf2printf(sb, "FAILED\n");
logmsg(LOGMSG_ERROR, "%s: analyze is already running\n", __func__);
return -1;
}
return 0;
}
void cleanup_stats(SBUF2 *sb)
{
struct sqlclntstate clnt;
start_internal_sql_clnt(&clnt);
if (get_dbtable_by_name("sqlite_stat1")) {
run_internal_sql_clnt(&clnt,
"delete from sqlite_stat1 where idx is null");
run_internal_sql_clnt(&clnt, "delete from sqlite_stat1 where idx not "
"in (select name from sqlite_master where "
"type='index')");
}
if (get_dbtable_by_name("sqlite_stat2"))
run_internal_sql_clnt(&clnt, "delete from sqlite_stat2 where idx not "
"in (select name from sqlite_master where "
"type='index')");
if (get_dbtable_by_name("sqlite_stat4"))
run_internal_sql_clnt(&clnt, "delete from sqlite_stat4 where idx not "
"in (select name from sqlite_master where "
"type='index' UNION select "
"'cdb2.'||name||'.sav' from sqlite_master "
"where type='index')");
end_internal_sql_clnt(&clnt);
}
/* returns the index or NULL */
static sampled_idx_t *find_sampled_index(struct sqlclntstate *client,
char *table, int ix)
{
int i;
/* punt if this wasn't sampled */
if (NULL == client->sampled_idx_tbl || client->n_cmp_idx <= 0) {
return NULL;
}
/* search for table / index */
for (i = 0; i < client->n_cmp_idx; i++) {
sampled_idx_t *s_ix = &(client->sampled_idx_tbl[i]);
if (!strcmp(table, s_ix->name) && ix == s_ix->ixnum) {
return &client->sampled_idx_tbl[i];
}
}
return NULL;
}
/* sample (previously misnamed compress) this index */
static int sample_index_int(index_descriptor_t *ix_des)
{
sampled_idx_t *s_ix = ix_des->s_ix;
struct dbtable *tbl = ix_des->tbl;
int sampling_pct = ix_des->sampling_pct;
int ix = ix_des->ix;
int rc;
int bdberr;
unsigned long long n_recs;
unsigned long long n_sampled_recs;
sampler_t *sampler = NULL;
/* cache the tablename for sqlglue */
strncpy0(s_ix->name, tbl->tablename, sizeof(s_ix->name));
/* ask bdb to put a summary of this into a temp-table */
rc = bdb_summarize_table(tbl->handle, ix, sampling_pct, &sampler,
&n_sampled_recs, &n_recs, &bdberr);
/* failed */
if (rc) {
logmsg(LOGMSG_ERROR, "%s: failed to sample table '%s' idx %d\n",
__func__, tbl->tablename, ix);
return -1;
}
/* fill in structure */
s_ix->ixnum = ix;
s_ix->sampler = sampler;
s_ix->sampling_pct = sampling_pct;
s_ix->n_recs = n_recs;
s_ix->n_sampled_recs = n_sampled_recs;
return 0;
}
/* spawn a thread to sample an index */
static void *sampling_thread(void *arg)
{
comdb2_name_thread(__func__);
int rc;
index_descriptor_t *ix_des = (index_descriptor_t *)arg;
/* register thread */
thrman_register(THRTYPE_ANALYZE);
backend_thread_event(thedb, COMDB2_THR_EVENT_START_RDWR);
/* update state */
ix_des->comp_state = SAMPLING_RUNNING;
/* sample the index */
rc = sample_index_int(ix_des);
/* mark the return */
if (0 == rc) {
ix_des->comp_state = SAMPLING_COMPLETE;
} else {
ix_des->comp_state = SAMPLING_ERROR;
}
/* release the thread */
Pthread_mutex_lock(&comp_thd_mutex);
analyze_cur_comp_threads--;
Pthread_cond_broadcast(&comp_thd_cond);
Pthread_mutex_unlock(&comp_thd_mutex);
/* cleanup */
backend_thread_event(thedb, COMDB2_THR_EVENT_DONE_RDWR);
return NULL;
}
/* dispatch a thread to sample this index */
static int dispatch_sample_index_thread(index_descriptor_t *ix_des)
{
/* grab lock */
Pthread_mutex_lock(&comp_thd_mutex);
/* wait for sampling thread availability */
while (analyze_cur_comp_threads >= analyze_max_comp_threads) {
Pthread_cond_wait(&comp_thd_cond, &comp_thd_mutex);
}
/* grab sampling thread */
analyze_cur_comp_threads++;
/* release */
Pthread_mutex_unlock(&comp_thd_mutex);
/* dispatch */
int rc = pthread_create(&ix_des->thread_id, &gbl_pthread_attr_detached,
sampling_thread, ix_des);
/* return */
return rc;
}
/* wait for an index to complete */
static int wait_for_index(index_descriptor_t *ix_des)
{
/* lock index mutex */
Pthread_mutex_lock(&comp_thd_mutex);
/* wait for the state to change */
while (ix_des->comp_state == SAMPLING_STARTUP ||
ix_des->comp_state == SAMPLING_RUNNING) {
Pthread_cond_wait(&comp_thd_cond, &comp_thd_mutex);
}
/* release */
Pthread_mutex_unlock(&comp_thd_mutex);
return 0;
}
/* sample all indicies in this table */
static int sample_indices(table_descriptor_t *td, struct sqlclntstate *client,
struct dbtable *tbl, int sampling_pct, SBUF2 *sb)
{
int i;
int err = 0;
index_descriptor_t *ix_des;
/* find table to backout */
char *table = tbl->tablename;
/* allocate cmp_idx */
client->sampled_idx_tbl = calloc(tbl->nix, sizeof(sampled_idx_t));
if (!client->sampled_idx_tbl) {
logmsg(LOGMSG_ERROR, "%s: out of memory\n", __func__);
return -1;
}
/* set # sampled ixs */
client->n_cmp_idx = tbl->nix;
/* sample indicies */
for (i = 0; i < client->n_cmp_idx; i++) {
/* prepare index descriptor */
ix_des = &td->index[i];
ix_des->comp_state = SAMPLING_STARTUP;
ix_des->s_ix = &client->sampled_idx_tbl[i];
ix_des->tbl = tbl;
ix_des->ix = i;
ix_des->sampling_pct = sampling_pct;
/* start an index sampling thread */
int rc = dispatch_sample_index_thread(ix_des);
if (0 != rc) {
logmsg(LOGMSG_ERROR, "Couldn't start sampling-thread for table '%s' ix %d "
"rc=%d\n",
table, i, rc);
err = 1;
break;
}
}
/* wait for them to complete */
for (i = 0; i < client->n_cmp_idx; i++) {
wait_for_index(&td->index[i]);
if (SAMPLING_COMPLETE != td->index[i].comp_state)
err = 1;
}
return err;
}
/* clean up */
static int cleanup_sampled_indicies(struct sqlclntstate *client)
{
int i;
/* delete sampled temptables */
for (i = 0; i < client->n_cmp_idx; i++) {
sampled_idx_t *s_ix = &client->sampled_idx_tbl[i];
if (!s_ix)
continue;
}
/* free & zero struct */
free(client->sampled_idx_tbl);
client->sampled_idx_tbl = NULL;
return 0;
}
/* Return the requested sampler */
sampler_t *analyze_get_sampler(struct sqlclntstate *client, char *table,
int idx)
{
sampled_idx_t *s_ix;
s_ix = find_sampled_index(client, table, idx);
if (!s_ix)
return NULL;
return s_ix->sampler;
}
/* Called from sqlite. Return the number of records for a sampled table */
int64_t analyze_get_nrecs(int iTable)
{
struct sql_thread *thd;
struct sqlclntstate *client;
struct dbtable *db;
sampled_idx_t *s_ix;
int ixnum;
unsigned long long n_recs;
/* get client structures */
thd = pthread_getspecific(query_info_key);
client = thd->clnt;
/* comdb2-ize table-num and ixnum */
db = get_sqlite_db(thd, iTable, &ixnum);
assert(db);
/* grab sampled table descriptor */
s_ix = find_sampled_index(client, db->tablename, ixnum);
/* return -1 if not sampled. Sqlite will use the value it calculated. */
if (!s_ix) {
return -1;
}
/* grab actual number of records */
n_recs = s_ix->n_recs;
/* boundry check return code */
assert( n_recs>=0 );
assert( n_recs<=LLONG_MAX );
/* return actual number of records */
return (int64_t)n_recs;
}
/* Return the number of records sampled for an index */
int64_t analyze_get_sampled_nrecs(const char *dbname, int ixnum)
{
struct sql_thread *thd;
struct sqlclntstate *client;
unsigned long long n_sampled_recs;
/* get client structures */
thd = pthread_getspecific(query_info_key);
client = thd->clnt;
/* Punt if this wasn't sampled. */
if (NULL == client->sampled_idx_tbl || client->n_cmp_idx <= 0) {
return -1;
}
assert(0 <= ixnum && ixnum < client->n_cmp_idx);
/* grab actual number of sampled records */
n_sampled_recs = client->sampled_idx_tbl[ixnum].n_sampled_recs;
/* boundry check return code */
assert( n_sampled_recs>=0 );
assert( n_sampled_recs<=LLONG_MAX );
/* return actual number of sampled records */
return (int64_t)n_sampled_recs;
}
/* Return 1 if we have this sampled index, 0 otherwise */
int analyze_is_sampled(struct sqlclntstate *client, char *table, int idx)
{
sampled_idx_t *s_ix;
s_ix = find_sampled_index(client, table, idx);
return (NULL != s_ix);
}
static int local_replicate_write_analyze(char *table)
{
int rc;
tran_type *trans = NULL;
long long seqno;
int nretries = 0;
struct ireq iq;
int arc;
struct block_state blkstate = {0};
/* skip if not needed */
if (gbl_replicate_local == 0 || get_dbtable_by_name("comdb2_oplog") == NULL)
return 0;
init_fake_ireq(thedb, &iq);
iq.blkstate = &blkstate;
again:
nretries++;
if (trans) {
arc = trans_abort(&iq, trans);
if (arc) {
logmsg(LOGMSG_ERROR, "Analyze: trans_abort rc %d\n", arc);
trans = NULL;
goto done;
}
trans = NULL;
}
if (nretries > gbl_maxretries)
return RC_INTERNAL_RETRY;
rc = trans_start(&iq, NULL, &trans);
if (rc) {
logmsg(LOGMSG_ERROR, "analyze: trans_start rc %d\n", rc);
goto done;
}
if (gbl_replicate_local_concurrent) {
unsigned long long useqno;
useqno = bdb_get_timestamp(thedb->bdb_env);
memcpy(&seqno, &useqno, sizeof(seqno));
} else
rc = get_next_seqno(trans, &seqno);
if (rc) {
if (rc != RC_INTERNAL_RETRY) {
logmsg(LOGMSG_ERROR, "get_next_seqno unexpected rc %d\n", rc);
goto done;
} else
goto again;
}
iq.blkstate->seqno = seqno;
iq.blkstate->pos = 0;
rc = add_oplog_entry(&iq, trans, LCL_OP_ANALYZE, table, strlen(table));
if (rc == RC_INTERNAL_RETRY)
goto again;
if (rc) {
logmsg(LOGMSG_ERROR, "analyze: add_oplog_entry(analyze) rc %d\n", rc);
goto done;
}
iq.blkstate->seqno = seqno;
iq.blkstate->pos = 1;
rc = add_oplog_entry(&iq, trans, LCL_OP_COMMIT, NULL, 0);
if (rc == RC_INTERNAL_RETRY)
goto again;
if (rc) {
logmsg(LOGMSG_ERROR, "analyze: add_oplog_entry(commit) rc %d\n", rc);
goto done;
}
rc = trans_commit(&iq, trans, gbl_myhostname);
trans = NULL;
if (rc) {
logmsg(LOGMSG_ERROR, "analyze: commit rc %d\n", rc);
goto done;
}
done:
if (trans) {
arc = trans_abort(&iq, trans);
if (arc)
logmsg(LOGMSG_ERROR, "analyze: trans_abort rc %d\n", arc);
}
return rc;
}
/* get tbl sampling threshold, if NOT -1 set it
*/
static void get_sampling_threshold(char *table, long long *sampling_thresh)
{
int bdberr = 0;
long long threshold = 0;
bdb_get_analyzethreshold_table(NULL, table, &threshold, &bdberr);
#ifdef DEBUG
printf("retrieving from llmeta saved threshold for table '%s': %lld\n",
table, threshold);
#endif
if (threshold > 0) {
*sampling_thresh = threshold;
#ifdef DEBUG
printf("Using llmetasaved threshold %d\n", *sampling_thresh);
}
else {
printf("Using default threshold %d\n", *sampling_thresh);
#endif
}
}
/* get coverage value saved in llmeta for table
* if value is not saved in llmeta, will not modify scale
*/
void get_saved_scale(char *table, int *scale)
{
int bdberr = 0;
int coveragevalue = 0;
bdb_get_analyzecoverage_table(NULL, table, &coveragevalue, &bdberr);
#ifdef DEBUG
printf("retrieving from llmeta saved coverage for table '%s': %d\n", table,
coveragevalue);
#endif
if (coveragevalue >= 0 && coveragevalue <= 100) {
*scale = coveragevalue;
}
}
int delete_sav(sqlite3 *sqldb, struct sqlclntstate *client, SBUF2 *sb,
int stat_tbl, const char *table)
{
char *sql = NULL;
int ii = 0;
int more = 1;
int rc = 0;
sql = sqlite3_mprintf(
"delete from sqlite_stat%d where tbl='cdb2.%q.sav'",
stat_tbl, table);
assert(sql != NULL);
#ifdef DEBUG
printf("query '%s'\n", sql);
#endif
if ( (rc = run_sql_part_trans( sqldb, client, sql, &more)) != 0) {
logmsg(LOGMSG_ERROR, "delete sav failed");
sqlite3_free(sql); sql = NULL;
return rc;
}
#ifdef DEBUG
printf("deleted %d from tbl='cdb2.%s.sav'\n", more, table);
#endif
ii++;
sqlite3_free(sql); sql = NULL;
return 0;
}
int update_sav(sqlite3 *sqldb, struct sqlclntstate *client, SBUF2 *sb,
int stat_tbl, const char *table)
{
char *sql = NULL;
int ii = 0;
int more = 1;
int rc = 0;
sql = sqlite3_mprintf(
"update sqlite_stat%d set tbl='cdb2.%q.sav' where tbl='%q'",
stat_tbl, table, table);
#ifdef DEBUG
printf("query '%s'\n", sql);
#endif
if ( (rc = run_sql_part_trans( sqldb, client, sql, &more)) != 0) {
logmsg(LOGMSG_ERROR, "update sav failed");
sqlite3_free(sql); sql = NULL;
return rc;
}
#ifdef DEBUG
printf("updated %d from tbl='cdb2.%s.sav'\n", more, table);
#endif
ii++;
sqlite3_free(sql); sql = NULL;
return 0;
}
static int analyze_rename_table_for_backup_stats(char *table, struct sqlclntstate *clnt,
char *zErrTab){
char *sql = NULL;
sql = sqlite3_mprintf(
"delete from sqlite_stat1 where tbl='cdb2.%q.sav'", table);
assert(sql != NULL);
int rc = run_internal_sql_clnt(clnt, sql);
if (rc) strncpy(zErrTab, sql, strlen(zErrTab));
sqlite3_free(sql); sql = NULL;
if (rc)
goto error;
sql = sqlite3_mprintf(
"update sqlite_stat1 set tbl='cdb2.%q.sav' where tbl='%q'",
table, table);
assert(sql != NULL);
rc = run_internal_sql_clnt(clnt, sql);
if (rc) strncpy(zErrTab, sql, strlen(zErrTab));
sqlite3_free(sql); sql = NULL;
if (rc)
goto error;
if (get_dbtable_by_name("sqlite_stat2")) {
sql = sqlite3_mprintf(
"delete from sqlite_stat2 where tbl='cdb2.%q.sav'", table);
assert(sql != NULL);
rc = run_internal_sql_clnt(clnt, sql);
if (rc) strncpy(zErrTab, sql, strlen(zErrTab));
sqlite3_free(sql); sql = NULL;
if (rc)
goto error;
sql = sqlite3_mprintf(
"update sqlite_stat2 set tbl='cdb2.%q.sav' where tbl='%q'",
table, table);
assert(sql != NULL);
rc = run_internal_sql_clnt(clnt, sql);
if (rc) strncpy(zErrTab, sql, strlen(zErrTab));
sqlite3_free(sql); sql = NULL;
if (rc)
goto error;
}
if (get_dbtable_by_name("sqlite_stat4")) {
sql = sqlite3_mprintf(
"delete from sqlite_stat4 where tbl='cdb2.%q.sav'", table);
assert(sql != NULL);
rc = run_internal_sql_clnt(clnt, sql);
if (rc) strncpy(zErrTab, sql, strlen(zErrTab));
sqlite3_free(sql); sql = NULL;
if (rc)
goto error;
sql = sqlite3_mprintf(
"update sqlite_stat4 set tbl='cdb2.%q.sav' where tbl='%q'",
table, table);
assert(sql != NULL);
rc = run_internal_sql_clnt(clnt, sql);
if (rc) strncpy(zErrTab, sql, strlen(zErrTab));
sqlite3_free(sql); sql = NULL;
if (rc)
goto error;
}
error:
return rc;
}
int analyze_regular_table(table_descriptor_t *td, struct sqlclntstate *clnt, char *zErrTab, size_t nErrTab) {
int rc = 0;
int have_schema_lk = 0;
int sampled_table = 0;
tran_type * tran = NULL;
rc = analyze_rename_table_for_backup_stats(td->table, clnt, zErrTab);
if (rc) {
logmsg(LOGMSG_ERROR, "analyze_rename_table_for_backup_stats failed with rc %d\n", rc);
goto err;
}
if (sampled_tables_enabled)
get_sampling_threshold(td->table, &sampling_threshold);
rdlock_schema_lk();
have_schema_lk = 1;
struct dbtable * const table = get_dbtable_by_name(td->table);
if (!table) {
logmsg(LOGMSG_ERROR, "%s: Cannot find table %s\n", __func__, td->table);
rc = 1;
goto err;
}
tran = get_read_only_tran();
if (!tran) {
logmsg(LOGMSG_ERROR, "%s: Could not get tran\n", __func__);
rc = 1;
goto err;
}
rc = bdb_lock_tablename_read(table->handle, table->tablename, tran);
if (rc) {
logmsg(LOGMSG_ERROR, "%s: Failed to acquire read lock on %s\n", __func__,
table->tablename);
rc = 1;
goto err;
}
unlock_schema_lk();
have_schema_lk = 0;
const int64_t totsiz = calc_table_size(table, 1);
if (sampled_tables_enabled) {
if (totsiz <= sampling_threshold) {
td->scale = 100;
}
logmsg(LOGMSG_INFO, "Sampling table '%s' at %d%% coverage\n", td->table, td->scale);
sampled_table = 1;
rc = sample_indices(td, clnt, table, td->scale, td->sb);
if (rc) {
logmsg(LOGMSG_USER, "Setting zErrTab\n");
snprintf(zErrTab, nErrTab, "Sampling table '%s'", td->table);
goto err;
}
}
rc = put_read_only_tran(tran);
tran = NULL;
if (rc) {
logmsg(LOGMSG_ERROR, "%s: Failed to put tran rc(%d)\n", __func__, rc);
goto err;
}
clnt->is_analyze = 1;
if (gbl_debug_sleep_on_analyze) {
sleep(gbl_debug_sleep_on_analyze);
}
/* run analyze as sql query */
char *sql = sqlite3_mprintf("analyzesqlite main.\"%w\"", td->table);
assert(sql != NULL);
rc = run_internal_sql_clnt(clnt, sql);
if (rc) strncpy(zErrTab, sql, strlen(zErrTab));
sqlite3_free(sql); sql = NULL;
clnt->is_analyze = 0;
if (rc)
goto err;
if (debug_switch_test_delay_analyze_commit())
sleep(10);
err:
if (have_schema_lk) {
unlock_schema_lk();
}
if (tran) {
put_read_only_tran(tran);
}
if (sampled_table) {
cleanup_sampled_indicies(clnt);
}
return rc;
}
static int analyze_table_int(table_descriptor_t *td,
struct thr_handle *thr_self)
{
char *zErrTab = (char *)malloc(256 * sizeof(char));
size_t nErrTab = 256;
#ifdef DEBUG
printf("analyze_table_int() table '%s': scale %d\n", td->table, td->scale);
#endif
/* make sure we can find this table */
struct dbtable *tbl = get_dbtable_by_name(td->table);
int isPartition = timepart_is_partition(td->table);
if (!tbl && !isPartition) {
sbuf2printf(td->sb, "?Cannot find table '%s'\n", td->table);
return -1;
}
if (td->override_llmeta == 0) // user did not specify override parameter
get_saved_scale(td->table, &td->scale);
if (td->scale == 0) {
sbuf2printf(td->sb, "?Coverage for table '%s' is 0, skipping analyze\n",
td->table);
logmsg(LOGMSG_INFO, "coverage for table '%s' is 0, skipping analyze\n", td->table);
return TABLE_SKIPPED;
}
struct sqlclntstate clnt;
start_internal_sql_clnt(&clnt);
clnt.osql_max_trans = 0; // allow large transactions
clnt.current_user = td->current_user;
if (td->appdata != NULL)
clnt.appdata = td->appdata;
if (td->get_authdata != NULL)
clnt.plugin.get_authdata = td->get_authdata;
logmsg(LOGMSG_INFO, "Analyze thread starting, table %s (%d%%)\n", td->table, td->scale);
int rc = run_internal_sql_clnt(&clnt, "BEGIN");
if (rc) {
snprintf(zErrTab, nErrTab, "BEGIN");
goto cleanup;
}
if (isPartition) { /* partitioned table */
rc = analyze_partition(td, &clnt, zErrTab, nErrTab);
} else { /* regular table */
rc = analyze_regular_table(td, &clnt, zErrTab, nErrTab);
} /* regular table */
if (rc) {
goto error;
}
rc = run_internal_sql_clnt(&clnt, "COMMIT /* from analyzesqlite main.... */");
if (rc) {
/*
** Manually unregister the client from the checkboard,
** if COMMIT or ROLLBACK fails.
*/
osql_unregister_sqlthr(&clnt);
snprintf(zErrTab, nErrTab, "COMMIT");
}
cleanup:
if (rc) { // send error to client
sbuf2printf(td->sb, "?Analyze table %s. Error occurred with: %s\n",
td->table, zErrTab);
} else {
sbuf2printf(td->sb, "?Analyze completed table %s\n", td->table);
logmsg(LOGMSG_INFO, "Analyze completed, table %s\n", td->table);
}
end_internal_sql_clnt(&clnt);
if (zErrTab) {
free(zErrTab);
}
return rc;
error:
if (run_internal_sql_clnt(&clnt, "ROLLBACK /* from analyzesqlite main.... */") != 0)
osql_unregister_sqlthr(&clnt);
goto cleanup;
}
/* spawn thread to analyze a table */
static void *table_thread(void *arg)
{
comdb2_name_thread(__func__);
int rc;
table_descriptor_t *td = (table_descriptor_t *)arg;
struct thr_handle *thd_self;
/* register thread */
thd_self = thrman_register(THRTYPE_ANALYZE);
backend_thread_event(thedb, COMDB2_THR_EVENT_START_RDWR);
stat4dump(1, td->table, 1); /* dump stats in trc file */
sql_mem_init(NULL);
thread_memcreate(analyze_thread_memory);
/* update state */
td->table_state = TABLE_RUNNING;
/* analyze the table */
rc = analyze_table_int(td, thd_self);
ctrace("analyze_table_int: Table %s, rc = %d\n", td->table, rc);
/* mark the return */
if (0 == rc) {
td->table_state = TABLE_COMPLETE;
if (thedb->master == gbl_myhostname) { // reset directly
ctrace("analyze: Analyzed Table %s, reseting counter to 0\n", td->table);
reset_aa_counter(td->table);
} else {
ctrace("analyze: Analyzed Table %s, msg to master to reset counter to 0\n", td->table);
bdb_send_analysed_table_to_master(thedb->bdb_env, td->table);
}
} else if (TABLE_SKIPPED == rc) {
td->table_state = TABLE_SKIPPED;
} else {
td->table_state = TABLE_FAILED;
}
/* release thread */
Pthread_mutex_lock(&table_thd_mutex);
analyze_cur_table_threads--;
Pthread_cond_broadcast(&table_thd_cond);
Pthread_mutex_unlock(&table_thd_mutex);
backend_thread_event(thedb, COMDB2_THR_EVENT_DONE_RDWR);
thread_memdestroy();
sql_mem_shutdown(NULL);
return NULL;
}