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MDEV-28993 Spider: Push down CASE statement
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57 changes: 57 additions & 0 deletions
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storage/spider/mysql-test/spider/feature/r/pushdown_case.result
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Original file line number | Diff line number | Diff line change |
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# | ||
# MDEV-28993 Spider: Push down CASE statement | ||
# | ||
for master_1 | ||
for child2 | ||
for child3 | ||
set spider_same_server_link= 1; | ||
CREATE SERVER srv FOREIGN DATA WRAPPER mysql | ||
OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root'); | ||
create table t2 (c int); | ||
create table t1 (c int) ENGINE=Spider | ||
COMMENT='WRAPPER "mysql", srv "srv",TABLE "t2"'; | ||
insert into t1 values (42), (3), (848), (100); | ||
explain select case c when 3 then "three" when 42 then "answer" else "other" end from t1; | ||
id select_type table type possible_keys key key_len ref rows Extra | ||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Storage engine handles GROUP BY | ||
select case c when 3 then "three" when 42 then "answer" else "other" end from t1; | ||
case c when 3 then "three" when 42 then "answer" else "other" end | ||
answer | ||
three | ||
other | ||
other | ||
explain select case c when 3 then "three" when 42 then "answer" end from t1; | ||
id select_type table type possible_keys key key_len ref rows Extra | ||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Storage engine handles GROUP BY | ||
select case c when 3 then "three" when 42 then "answer" end from t1; | ||
case c when 3 then "three" when 42 then "answer" end | ||
answer | ||
three | ||
NULL | ||
NULL | ||
explain select case when c = 3 then "three" when c = 42 then "answer" else "other" end from t1; | ||
id select_type table type possible_keys key key_len ref rows Extra | ||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Storage engine handles GROUP BY | ||
select case when c = 3 then "three" when c = 42 then "answer" else "other" end from t1; | ||
case when c = 3 then "three" when c = 42 then "answer" else "other" end | ||
answer | ||
three | ||
other | ||
other | ||
explain select case when c = 3 then "three" when c = 42 then "answer" end from t1; | ||
id select_type table type possible_keys key key_len ref rows Extra | ||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Storage engine handles GROUP BY | ||
select case when c = 3 then "three" when c = 42 then "answer" end from t1; | ||
case when c = 3 then "three" when c = 42 then "answer" end | ||
answer | ||
three | ||
NULL | ||
NULL | ||
drop table t1, t2; | ||
drop server srv; | ||
for master_1 | ||
for child2 | ||
for child3 | ||
# | ||
# end of test pushdown_case | ||
# |
50 changes: 50 additions & 0 deletions
50
storage/spider/mysql-test/spider/feature/t/pushdown_case.test
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--echo # | ||
--echo # MDEV-28993 Spider: Push down CASE statement | ||
--echo # | ||
--disable_query_log | ||
--disable_result_log | ||
--source ../../t/test_init.inc | ||
--enable_result_log | ||
--enable_query_log | ||
set spider_same_server_link= 1; | ||
evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql | ||
OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root'); | ||
create table t2 (c int); | ||
create table t1 (c int) ENGINE=Spider | ||
COMMENT='WRAPPER "mysql", srv "srv",TABLE "t2"'; | ||
insert into t1 values (42), (3), (848), (100); | ||
|
||
# everything | ||
let $query= | ||
select case c when 3 then "three" when 42 then "answer" else "other" end from t1; | ||
eval explain $query; | ||
eval $query; | ||
|
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# no else | ||
let $query= | ||
select case c when 3 then "three" when 42 then "answer" end from t1; | ||
eval explain $query; | ||
eval $query; | ||
|
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# no value | ||
let $query= | ||
select case when c = 3 then "three" when c = 42 then "answer" else "other" end from t1; | ||
eval explain $query; | ||
eval $query; | ||
|
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# neither | ||
let $query= | ||
select case when c = 3 then "three" when c = 42 then "answer" end from t1; | ||
eval explain $query; | ||
eval $query; | ||
|
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drop table t1, t2; | ||
drop server srv; | ||
--disable_query_log | ||
--disable_result_log | ||
--source ../../t/test_deinit.inc | ||
--enable_result_log | ||
--enable_query_log | ||
--echo # | ||
--echo # end of test pushdown_case | ||
--echo # |
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