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Diffstat (limited to 'mysql-test/main/greedy_optimizer.test')
| -rw-r--r-- | mysql-test/main/greedy_optimizer.test | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/mysql-test/main/greedy_optimizer.test b/mysql-test/main/greedy_optimizer.test new file mode 100644 index 00000000000..dcd0587d76e --- /dev/null +++ b/mysql-test/main/greedy_optimizer.test @@ -0,0 +1,391 @@ +# +# A simple test of the greedy query optimization algorithm and the switches that +# control the optimizationprocess. +# + +# +# Schema +# +--disable_warnings +drop table if exists t1,t2,t3,t4,t5,t6,t7; +--enable_warnings + +set @save_join_cache_level=@@join_cache_level; +set join_cache_level=1; + +create table t1 ( + c11 integer,c12 integer,c13 integer,c14 integer,c15 integer,c16 integer, + primary key (c11) +); +create table t2 ( + c21 integer,c22 integer,c23 integer,c24 integer,c25 integer,c26 integer +); +create table t3 ( + c31 integer,c32 integer,c33 integer,c34 integer,c35 integer,c36 integer, + primary key (c31) +); +create table t4 ( + c41 integer,c42 integer,c43 integer,c44 integer,c45 integer,c46 integer +); +create table t5 ( + c51 integer,c52 integer,c53 integer,c54 integer,c55 integer,c56 integer, + primary key (c51) +); +create table t6 ( + c61 integer,c62 integer,c63 integer,c64 integer,c65 integer,c66 integer +); +create table t7 ( + c71 integer,c72 integer,c73 integer,c74 integer,c75 integer,c76 integer, + primary key (c71) +); + +# +# Data +# cardinality(Ti) = cardinality(T(i-1)) + 3 +# +insert into t1 values (1,2,3,4,5,6); +insert into t1 values (2,2,3,4,5,6); +insert into t1 values (3,2,3,4,5,6); + +insert into t2 values (1,2,3,4,5,6); +insert into t2 values (2,2,3,4,5,6); +insert into t2 values (3,2,3,4,5,6); +insert into t2 values (4,2,3,4,5,6); +insert into t2 values (5,2,3,4,5,6); +insert into t2 values (6,2,3,4,5,6); + +insert into t3 values (1,2,3,4,5,6); +insert into t3 values (2,2,3,4,5,6); +insert into t3 values (3,2,3,4,5,6); +insert into t3 values (4,2,3,4,5,6); +insert into t3 values (5,2,3,4,5,6); +insert into t3 values (6,2,3,4,5,6); +insert into t3 values (7,2,3,4,5,6); +insert into t3 values (8,2,3,4,5,6); +insert into t3 values (9,2,3,4,5,6); + +insert into t4 values (1,2,3,4,5,6); +insert into t4 values (2,2,3,4,5,6); +insert into t4 values (3,2,3,4,5,6); +insert into t4 values (4,2,3,4,5,6); +insert into t4 values (5,2,3,4,5,6); +insert into t4 values (6,2,3,4,5,6); +insert into t4 values (7,2,3,4,5,6); +insert into t4 values (8,2,3,4,5,6); +insert into t4 values (9,2,3,4,5,6); +insert into t4 values (10,2,3,4,5,6); +insert into t4 values (11,2,3,4,5,6); +insert into t4 values (12,2,3,4,5,6); + +insert into t5 values (1,2,3,4,5,6); +insert into t5 values (2,2,3,4,5,6); +insert into t5 values (3,2,3,4,5,6); +insert into t5 values (4,2,3,4,5,6); +insert into t5 values (5,2,3,4,5,6); +insert into t5 values (6,2,3,4,5,6); +insert into t5 values (7,2,3,4,5,6); +insert into t5 values (8,2,3,4,5,6); +insert into t5 values (9,2,3,4,5,6); +insert into t5 values (10,2,3,4,5,6); +insert into t5 values (11,2,3,4,5,6); +insert into t5 values (12,2,3,4,5,6); +insert into t5 values (13,2,3,4,5,6); +insert into t5 values (14,2,3,4,5,6); +insert into t5 values (15,2,3,4,5,6); + +insert into t6 values (1,2,3,4,5,6); +insert into t6 values (2,2,3,4,5,6); +insert into t6 values (3,2,3,4,5,6); +insert into t6 values (4,2,3,4,5,6); +insert into t6 values (5,2,3,4,5,6); +insert into t6 values (6,2,3,4,5,6); +insert into t6 values (7,2,3,4,5,6); +insert into t6 values (8,2,3,4,5,6); +insert into t6 values (9,2,3,4,5,6); +insert into t6 values (10,2,3,4,5,6); +insert into t6 values (11,2,3,4,5,6); +insert into t6 values (12,2,3,4,5,6); +insert into t6 values (13,2,3,4,5,6); +insert into t6 values (14,2,3,4,5,6); +insert into t6 values (15,2,3,4,5,6); +insert into t6 values (16,2,3,4,5,6); +insert into t6 values (17,2,3,4,5,6); +insert into t6 values (18,2,3,4,5,6); + +insert into t7 values (1,2,3,4,5,6); +insert into t7 values (2,2,3,4,5,6); +insert into t7 values (3,2,3,4,5,6); +insert into t7 values (4,2,3,4,5,6); +insert into t7 values (5,2,3,4,5,6); +insert into t7 values (6,2,3,4,5,6); +insert into t7 values (7,2,3,4,5,6); +insert into t7 values (8,2,3,4,5,6); +insert into t7 values (9,2,3,4,5,6); +insert into t7 values (10,2,3,4,5,6); +insert into t7 values (11,2,3,4,5,6); +insert into t7 values (12,2,3,4,5,6); +insert into t7 values (13,2,3,4,5,6); +insert into t7 values (14,2,3,4,5,6); +insert into t7 values (15,2,3,4,5,6); +insert into t7 values (16,2,3,4,5,6); +insert into t7 values (17,2,3,4,5,6); +insert into t7 values (18,2,3,4,5,6); +insert into t7 values (19,2,3,4,5,6); +insert into t7 values (20,2,3,4,5,6); +insert into t7 values (21,2,3,4,5,6); + +# +# The actual test begins here +# + +# Check the default values for the optimizer parameters + +select @@optimizer_search_depth; +select @@optimizer_prune_level; + +# This value swithes back to the old implementation of 'find_best()' +# set optimizer_search_depth=63; - old (independent of the optimizer_prune_level) +# +# These are the values for the parameters that control the greedy optimizer +# (total 6 combinations - 3 for optimizer_search_depth, 2 for optimizer_prune_level): +# 3: +# set optimizer_search_depth=0; - automatic +# set optimizer_search_depth=1; - min +# set optimizer_search_depth=62; - max (default) +# 2: +# set optimizer_prune_level=0 - exhaustive; +# set optimizer_prune_level=1 - heuristic; # default + + +# +# Compile several queries with all combinations of the query +# optimizer parameters. Each test query has two variants, where +# in the second variant the tables in the FROM clause are in +# inverse order to the tables in the first variant. +# Due to pre-sorting of tables before compilation, there should +# be no difference in the plans for each two such query variants. +# + +# First, for reference compile the test queries with the 'old' optimization +# procedure 'find_best'. Notice that 'find_best' does not depend on the +# choice of heuristic. + +set optimizer_search_depth=63; +select @@optimizer_search_depth; + +# 6-table join, chain +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, star +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, clique +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; + + +# Test the new optimization procedures + +set optimizer_prune_level=0; +select @@optimizer_prune_level; + +set optimizer_search_depth=0; +select @@optimizer_search_depth; + +# 6-table join, chain +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, star +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, clique +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; + +set optimizer_search_depth=1; +select @@optimizer_search_depth; + +# 6-table join, chain +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, star +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, clique +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; + +set optimizer_search_depth=62; +select @@optimizer_search_depth; + +# 6-table join, chain +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, star +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, clique +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; + + +set optimizer_prune_level=1; +select @@optimizer_prune_level; + +set optimizer_search_depth=0; +select @@optimizer_search_depth; + +# 6-table join, chain +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, star +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, clique +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; + +set optimizer_search_depth=1; +select @@optimizer_search_depth; + +# 6-table join, chain +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, star +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, clique +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; + +set optimizer_search_depth=62; +select @@optimizer_search_depth; + +# 6-table join, chain +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, star +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; +show status like 'Last_query_cost'; +# 6-table join, clique +explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; +explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; +show status like 'Last_query_cost'; + +drop table t1,t2,t3,t4,t5,t6,t7; + + +# +# Bug # 38795: Automatic search depth and nested join's results in server +# crash +# + +CREATE TABLE t1 (a int, b int, d int, i int); INSERT INTO t1 VALUES (1,1,1,1); +CREATE TABLE t2 (b int, c int, j int); INSERT INTO t2 VALUES (1,1,1); +CREATE TABLE t2_1 (j int); INSERT INTO t2_1 VALUES (1); +CREATE TABLE t3 (c int, f int); INSERT INTO t3 VALUES (1,1); +CREATE TABLE t3_1 (f int); INSERT INTO t3_1 VALUES (1); +CREATE TABLE t4 (d int, e int, k int); INSERT INTO t4 VALUES (1,1,1); +CREATE TABLE t4_1 (k int); INSERT INTO t4_1 VALUES (1); +CREATE TABLE t5 (g int, d int, h int, l int); INSERT INTO t5 VALUES (1,1,1,1); +CREATE TABLE t5_1 (l int); INSERT INTO t5_1 VALUES (1); + +SET optimizer_search_depth = 3; + +SELECT 1 +FROM t1 +LEFT JOIN ( + t2 JOIN t3 ON t3.c = t2.c +) ON t2.b = t1.b +LEFT JOIN ( + t4 JOIN t5 ON t5.d = t4.d +) ON t4.d = t1.d +; + +SELECT 1 +FROM t1 +LEFT JOIN ( + t2 LEFT JOIN (t3 JOIN t3_1 ON t3.f = t3_1.f) ON t3.c = t2.c +) ON t2.b = t1.b +LEFT JOIN ( + t4 JOIN t5 ON t5.d = t4.d +) ON t4.d = t1.d +; + +SELECT 1 +FROM t1 +LEFT JOIN ( + (t2 JOIN t2_1 ON t2.j = t2_1.j) JOIN t3 ON t3.c = t2.c +) ON t2.b = t1.b +LEFT JOIN ( + t4 JOIN t5 ON t5.d = t4.d +) ON t4.d = t1.d +; + +SELECT 1 +FROM t1 +LEFT JOIN ( + t2 JOIN t3 ON t3.c = t2.c +) ON t2.b = t1.b +LEFT JOIN ( + (t4 JOIN t4_1 ON t4.k = t4_1.k) LEFT JOIN t5 ON t5.d = t4.d +) ON t4.d = t1.d +; + +SELECT 1 +FROM t1 +LEFT JOIN ( + t2 JOIN t3 ON t3.c = t2.c +) ON t2.b = t1.b +LEFT JOIN ( + t4 LEFT JOIN (t5 JOIN t5_1 ON t5.l = t5_1.l) ON t5.d = t4.d +) ON t4.d = t1.d +; + +SET optimizer_search_depth = DEFAULT; +DROP TABLE t1,t2,t2_1,t3,t3_1,t4,t4_1,t5,t5_1; + +--echo End of 5.0 tests + +set join_cache_level=@save_join_cache_level; |