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MDEV-408: SHOW EXPLAIN: Some values are chopped off in SHOW EXPLAIN output

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- Fix I_S table definition for EXPLAIN output.
This commit is contained in:
Sergey Petrunya 2012-07-24 14:02:53 +04:00
parent 8950ed8fdd
commit 3956950b9f
3 changed files with 56 additions and 4 deletions
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25
mysql-test/r/show_explain.result
View File

@ -926,4 +926,29 @@ a
16 16
set debug_dbug=''; set debug_dbug='';
drop table t1; drop table t1;
#
# MDEV-408: SHOW EXPLAIN: Some values are chopped off in SHOW EXPLAIN output
#
CREATE TABLE t1 (a INT, b VARCHAR(35)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (3989,'Abilene'),(3873,'Akron');
CREATE TABLE t2 (c INT, d VARCHAR(52) PRIMARY KEY, KEY(c)) ENGINE=InnoDB;
INSERT INTO t2 VALUES (86,'English'),(87,'Russian');
explain SELECT SUM(a + SLEEP(0.1)) FROM t1 WHERE a IN ( SELECT c FROM t2 WHERE d < b ) OR b < 's';
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 index_subquery PRIMARY,c c 5 func 1 Using index; Using where
set @show_explain_probe_select_id=1;
set debug_dbug='d,show_explain_probe_join_exec_start';
SELECT SUM(a + SLEEP(0.1)) FROM t1 WHERE a IN ( SELECT c FROM t2 WHERE d < b ) OR b < 's';
show explain for $thr2;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 index_subquery PRIMARY,c c 5 func 1 Using index; Using where
Warnings:
Note 1003 SELECT SUM(a + SLEEP(0.1)) FROM t1 WHERE a IN ( SELECT c FROM t2 WHERE d < b ) OR b < 's'
SUM(a + SLEEP(0.1))
7862
set debug_dbug='';
drop table t1, t2;
# End
drop table t0; drop table t0;

29
mysql-test/t/show_explain.test
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@ -947,5 +947,32 @@ set debug_dbug='';
drop table t1; drop table t1;
drop table t0; --echo #
--echo # MDEV-408: SHOW EXPLAIN: Some values are chopped off in SHOW EXPLAIN output
--echo #
CREATE TABLE t1 (a INT, b VARCHAR(35)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (3989,'Abilene'),(3873,'Akron');
CREATE TABLE t2 (c INT, d VARCHAR(52) PRIMARY KEY, KEY(c)) ENGINE=InnoDB;
INSERT INTO t2 VALUES (86,'English'),(87,'Russian');
explain SELECT SUM(a + SLEEP(0.1)) FROM t1 WHERE a IN ( SELECT c FROM t2 WHERE d < b ) OR b < 's';
set @show_explain_probe_select_id=1;
set debug_dbug='d,show_explain_probe_join_exec_start';
--send
SELECT SUM(a + SLEEP(0.1)) FROM t1 WHERE a IN ( SELECT c FROM t2 WHERE d < b ) OR b < 's';
connection default;
--source include/wait_condition.inc
evalp show explain for $thr2;
connection con1;
reap;
set debug_dbug='';
drop table t1, t2;
--echo # End
drop table t0;

6
sql/sql_show.cc
View File

@ -8495,11 +8495,11 @@ ST_FIELD_INFO show_explain_fields_info[]=
SKIP_OPEN_TABLE}, SKIP_OPEN_TABLE},
{"table", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0 /*value*/, MY_I_S_MAYBE_NULL, {"table", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0 /*value*/, MY_I_S_MAYBE_NULL,
"table", SKIP_OPEN_TABLE}, "table", SKIP_OPEN_TABLE},
{"type", 11, MYSQL_TYPE_STRING, 0, MY_I_S_MAYBE_NULL, "type", SKIP_OPEN_TABLE}, {"type", 15, MYSQL_TYPE_STRING, 0, MY_I_S_MAYBE_NULL, "type", SKIP_OPEN_TABLE},
{"possible_keys", NAME_CHAR_LEN*MAX_KEY, MYSQL_TYPE_STRING, 0/*value*/, {"possible_keys", NAME_CHAR_LEN*MAX_KEY, MYSQL_TYPE_STRING, 0/*value*/,
MY_I_S_MAYBE_NULL, "possible_keys", SKIP_OPEN_TABLE}, MY_I_S_MAYBE_NULL, "possible_keys", SKIP_OPEN_TABLE},
{"key", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0/*value*/, MY_I_S_MAYBE_NULL, {"key", NAME_CHAR_LEN*MAX_KEY, MYSQL_TYPE_STRING, 0/*value*/,
"key", SKIP_OPEN_TABLE}, MY_I_S_MAYBE_NULL, "key", SKIP_OPEN_TABLE},
{"key_len", NAME_CHAR_LEN*MAX_KEY, MYSQL_TYPE_STRING, 0/*value*/, {"key_len", NAME_CHAR_LEN*MAX_KEY, MYSQL_TYPE_STRING, 0/*value*/,
MY_I_S_MAYBE_NULL, "key_len", SKIP_OPEN_TABLE}, MY_I_S_MAYBE_NULL, "key_len", SKIP_OPEN_TABLE},
{"ref", NAME_CHAR_LEN*MAX_REF_PARTS, MYSQL_TYPE_STRING, 0/*value*/, {"ref", NAME_CHAR_LEN*MAX_REF_PARTS, MYSQL_TYPE_STRING, 0/*value*/,