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statstics: forcely use index to order when to init stats #52462

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merged 3 commits into from
Apr 11, 2024
Merged

statstics: forcely use index to order when to init stats #52462

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statstics: forcely use index to order when to init stats
hawkingrei Apr 9, 2024
40aff17
statstics: forcely use index to order when to init stats
hawkingrei Apr 9, 2024
7671145
statstics: forcely use index to order when to init stats
hawkingrei Apr 9, 2024
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8 changes: 4 additions & 4 deletions pkg/statistics/handle/bootstrap.go
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Original file line number Diff line number Diff line change
Expand Up @@ -269,7 +269,7 @@ func (h *Handle) initStatsHistograms4Chunk(is infoschema.InfoSchema, cache stats
}

func (h *Handle) initStatsHistogramsLite(is infoschema.InfoSchema, cache statstypes.StatsCache) error {
sql := "select HIGH_PRIORITY table_id, is_index, hist_id, distinct_count, version, null_count, tot_col_size, stats_ver, correlation, flag, last_analyze_pos from mysql.stats_histograms order by table_id"
sql := "select /*+ ORDER_INDEX(mysql.stats_histograms,tbl)*/ HIGH_PRIORITY table_id, is_index, hist_id, distinct_count, version, null_count, tot_col_size, stats_ver, correlation, flag, last_analyze_pos from mysql.stats_histograms order by table_id"
rc, err := util.Exec(h.initStatsCtx, sql)
if err != nil {
return errors.Trace(err)
Expand All @@ -292,7 +292,7 @@ func (h *Handle) initStatsHistogramsLite(is infoschema.InfoSchema, cache statsty
}

func (h *Handle) initStatsHistograms(is infoschema.InfoSchema, cache statstypes.StatsCache) error {
sql := "select HIGH_PRIORITY table_id, is_index, hist_id, distinct_count, version, null_count, cm_sketch, tot_col_size, stats_ver, correlation, flag, last_analyze_pos from mysql.stats_histograms order by table_id"
sql := "select /*+ ORDER_INDEX(mysql.stats_histograms,tbl)*/ HIGH_PRIORITY table_id, is_index, hist_id, distinct_count, version, null_count, cm_sketch, tot_col_size, stats_ver, correlation, flag, last_analyze_pos from mysql.stats_histograms order by table_id"
rc, err := util.Exec(h.initStatsCtx, sql)
if err != nil {
return errors.Trace(err)
Expand Down Expand Up @@ -402,7 +402,7 @@ func (*Handle) initStatsTopN4Chunk(cache statstypes.StatsCache, iter *chunk.Iter
}

func (h *Handle) initStatsTopN(cache statstypes.StatsCache) error {
sql := "select HIGH_PRIORITY table_id, hist_id, value, count from mysql.stats_top_n where is_index = 1 order by table_id"
sql := "select /*+ ORDER_INDEX(mysql.stats_top_n,tbl)*/ HIGH_PRIORITY table_id, hist_id, value, count from mysql.stats_top_n where is_index = 1 order by table_id"
rc, err := util.Exec(h.initStatsCtx, sql)
if err != nil {
return errors.Trace(err)
Expand Down Expand Up @@ -592,7 +592,7 @@ func (h *Handle) initStatsBuckets(cache statstypes.StatsCache) error {
return errors.Trace(err)
}
} else {
sql := "select HIGH_PRIORITY table_id, is_index, hist_id, count, repeats, lower_bound, upper_bound, ndv from mysql.stats_buckets order by table_id, is_index, hist_id, bucket_id"
sql := "select /*+ ORDER_INDEX(mysql.stats_buckets,tbl)*/ HIGH_PRIORITY table_id, is_index, hist_id, count, repeats, lower_bound, upper_bound, ndv from mysql.stats_buckets order by table_id, is_index, hist_id, bucket_id"
rc, err := util.Exec(h.initStatsCtx, sql)
if err != nil {
return errors.Trace(err)
Expand Down