mysql query equivalent to a condition. Any suggestions? - mysql

Question

I am not a sql expert.
I want to implement a query equivalent to this condition
If ( (first-access-of-error1 = first-access-of-error2 and
second-access-of-error1 = second-access-of-error2) OR
(first-access-of-error1 = second-access-of-error2 and
second-accessr-of-error1 = first-access-of-error2) )
I attempted it with something like:
select d.id,
concat(a.variable_name,"|",a.file_url,"|",a.line_number,"|",a.stacktrace)
as FirstAccess_Params,
concat(b.variable_name,"|",b.file_url,"|",b.line_number,"|",b.stacktrace)
as SecondA_Params
from defect d
right join (accessor a, accessor b)
on (d.id=a.defect_id and d.id=b.defect_id and a.id<b.id)
where d.category_id=0 and d.relationship_id!=-1
group by FirstAccess_Params,SecondA_Params
With above query I am able to work this condition out:
(first-access-of-error1 = first-access-of-error2 and
second-access-of-error1 = second-access-of-error2)
But I am having trouble like how to accomplish this condition:
(first-access-of-error1 = second-access-of-error2 and
second-accessr-of-error1 = first-access-of-error2)
Any help is appreciated? Any ideas are welcome..
This is schema for Accessor table
<createTable tableName="accessor">
<column autoIncrement="true" name="id" type="BIGINT UNSIGNED">
<constraints nullable="false" primaryKey="true"/>
</column>
<column name="defect_id" type="BIGINT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="operation" type="TINYINT UNSIGNED"/>
<column name="variable_name" type="VARCHAR(128)"/>
<column name="object_address" type="VARCHAR(64)"/>
<column name="type" type="TINYINT UNSIGNED"/>
<column name="module_id" type="INT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="file_url" type="VARCHAR(256)"/>
<column name="function_name" type="VARCHAR(64)"/>
<column name="line_number" type="SMALLINT UNSIGNED"/>
<column name="accessing_order" type="TINYINT UNSIGNED"/>
<column name="stacktrace_type" type="TINYINT UNSIGNED"/>
<column name="stacktrace" type="VARCHAR(2048)"/>
<column name="parameter" type="VARCHAR(5120)"/>
</createTable>
And this is schema for defect Table
<createTable tableName="defect">
<column autoIncrement="true" name="id" type="BIGINT UNSIGNED">
<constraints nullable="false" primaryKey="true"/>
</column>
<column defaultValueNumeric="0" name="rule_id" type="SMALLINT UNSIGNED">
<constraints nullable="false"/>
</column>
<column defaultValueBoolean="false" name="hide" type="BIT">
<constraints nullable="false"/>
</column>
<column defaultValueNumeric="0" name="relationship_id" type="BIGINT">
<constraints nullable="false"/>
</column>
<column name="category_id" type="SMALLINT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="sub_category_id" type="SMALLINT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="module1_id" type="INT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="module2_id" type="INT UNSIGNED"/>
<column name="execution_instance_id" type="INT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="application_id" type="INT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="project_id" type="INT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="target_id" type="INT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="testsuite_id" type="INT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="timestamp" type="INT UNSIGNED">
<constraints nullable="false"/>
</column>
<column name="priority" type="BIT"/>
<column name="status" type="BIT"/>
<column name="assignee" type="VARCHAR(64)"/>
<column name="label_ids" type="VARCHAR(1024)"/>
<column name="remark" type="VARCHAR(512)"/>
<column name="accessor_ids" type="VARCHAR(1024)"/>
<column name="parameter" type="VARCHAR(2048)"/>
<column defaultValueNumeric="0" name="parent_id" type="BIGINT">
<constraints nullable="false"/>
</column>
</createTable>

Answer 1

Consider this jsFiddle: http://sqlfiddle.com/#!2/c25e1/1 . It doesn't show duplicates. Also think about using DISTINCT sql command.

Answer 2

For the completeness of answer:
To accomplish first condition:
(first-access-of-error1 = first-access-of-error2 and
second-access-of-error1 = second-access-of-error2)
My code was sort of correct. Look at similar thing here https://stackoverflow.com/a/347300/1229355
The challenging part was to accomplish second condition:
(first-access-of-error1 = second-access-of-error2 and
second-accessr-of-error1 = first-access-of-error2)
For This: I created a new table. Though I started with the view, then moved to temporary table and then final to table. With view, I was having trouble in performance. As query was spending a lot of time in copying tmp table. With temporary table, I cannot use it in one query more then once, so it was not an option for me. So I had to stick with the table only.
Created table like this:
create table myDraceView (index(id)) as select d.id,concat_ws('|',a.variable_name,a.file_url,a.line_number,a.stacktrace) as FirstAccess_Params,"
+ "concat_ws('|',b.variable_name,b.file_url,b.line_number,b.stacktrace) as SecondA_Params from defect d right join (accessor a, accessor b) on (d.id=a.defect_id and d.id=b.defect_id and a.id<b.id) where d.category_id=0 and d.relationship_id!=-1 and d.defect_level='"
+ type
+ "' and "
+ mdaCondition;
(Sorry rushing.. have no time to write the query formally... shall do it later)
Then I did:
"select ids from (select concat( if( e1.id <= e2.id, e1.id, e2.id ),"
+ CONCAT_SEP
+ ",if( e1.id > e2.id, e1.id, e2.id ) ) as ids,e1.FirstAccess_Params as e1_FA,e1.SecondA_Params as e1_SA from myDraceView e1 join myDraceView e2 where e1.FirstAccess_Params=e2.SecondA_Params and e1.SecondA_Params=e2.FirstAccess_Params and e1.id!=e2.id group by e1.FirstAccess_Params,e1.SecondA_Params ) as l group by ids";
Any suggestions are welcome if anybody see any possible improvements that i can make.