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CREATE TABLE test_ps_fetch (a INT, b INT, c INT, d INT, PRIMARY KEY (a, b), INDEX idx (c, d)) ENGINE=INNODB STATS_PERSISTENT=1; ANALYZE TABLE test_ps_fetch; Table test.test_ps_fetch Op analyze Msg_type status Msg_text OK SELECT n_rows, clustered_index_size, sum_of_other_index_sizes FROM mysql.innodb_table_stats WHERE table_name = 'test_ps_fetch'; n_rows 0 clustered_index_size 1 sum_of_other_index_sizes 1 SELECT index_name, stat_name, stat_value, sample_size, stat_description FROM mysql.innodb_index_stats WHERE table_name = 'test_ps_fetch' ORDER BY index_name, stat_name; index_name PRIMARY stat_name n_diff_pfx01 stat_value 0 sample_size 1 stat_description a index_name PRIMARY stat_name n_diff_pfx02 stat_value 0 sample_size 1 stat_description a,b index_name PRIMARY stat_name n_leaf_pages stat_value 1 sample_size NULL stat_description Number of leaf pages in the index index_name PRIMARY stat_name size stat_value 1 sample_size NULL stat_description Number of pages in the index index_name idx stat_name n_diff_pfx01 stat_value 0 sample_size 1 stat_description c index_name idx stat_name n_diff_pfx02 stat_value 0 sample_size 1 stat_description c,d index_name idx stat_name n_diff_pfx03 stat_value 0 sample_size 1 stat_description c,d,a index_name idx stat_name n_diff_pfx04 stat_value 0 sample_size 1 stat_description c,d,a,b index_name idx stat_name n_leaf_pages stat_value 1 sample_size NULL stat_description Number of leaf pages in the index index_name idx stat_name size stat_value 1 sample_size NULL stat_description Number of pages in the index SELECT index_name, seq_in_index, column_name, cardinality FROM information_schema.statistics WHERE table_name = 'test_ps_fetch' ORDER BY index_name, seq_in_index; index_name idx seq_in_index 1 column_name c cardinality 0 index_name idx seq_in_index 2 column_name d cardinality 0 index_name PRIMARY seq_in_index 1 column_name a cardinality 0 index_name PRIMARY seq_in_index 2 column_name b cardinality 0 SELECT table_rows, avg_row_length, max_data_length, index_length FROM information_schema.tables WHERE table_name = 'test_ps_fetch'; table_rows 0 avg_row_length 0 max_data_length 0 index_length 16384 UPDATE mysql.innodb_table_stats SET n_rows = 1000, clustered_index_size = 5 WHERE table_name = 'test_ps_fetch'; UPDATE mysql.innodb_index_stats SET stat_value = 20 WHERE table_name = 'test_ps_fetch' AND index_name = 'PRIMARY' AND stat_name = 'n_diff_pfx01'; UPDATE mysql.innodb_index_stats SET stat_value = 90 WHERE table_name = 'test_ps_fetch' AND index_name = 'PRIMARY' AND stat_name = 'n_diff_pfx02'; UPDATE mysql.innodb_index_stats SET stat_value = 3 WHERE table_name = 'test_ps_fetch' AND index_name = 'idx' AND stat_name = 'n_diff_pfx01'; UPDATE mysql.innodb_index_stats SET stat_value = 11 WHERE table_name = 'test_ps_fetch' AND index_name = 'idx' AND stat_name = 'n_diff_pfx02'; FLUSH TABLE test_ps_fetch; SELECT seq_in_index, column_name, cardinality FROM information_schema.statistics WHERE table_name = 'test_ps_fetch' ORDER BY index_name, seq_in_index; seq_in_index 1 column_name c cardinality 3 seq_in_index 2 column_name d cardinality 11 seq_in_index 1 column_name a cardinality 20 seq_in_index 2 column_name b cardinality 90 SELECT table_rows, avg_row_length, max_data_length, index_length FROM information_schema.tables WHERE table_name = 'test_ps_fetch'; table_rows 1000 avg_row_length 81 max_data_length 0 index_length 16384 DROP TABLE test_ps_fetch;