]
Mark Tawk commented on TEIID-3289:
----------------------------------
the workaround by adding {ts '0001-01-01 00:00:00'} in the ifnull solved the
problem
Thanks a lot
Join subquery containing ifnull in join condition
-------------------------------------------------
Key: TEIID-3289
URL:
https://issues.jboss.org/browse/TEIID-3289
Project: Teiid
Issue Type: Feature Request
Reporter: Mark Tawk
Assignee: Steven Hawkins
Priority: Critical
I have join subquery linked to main query via 2 fields in the query below.
To be able to join null values between main query and subquery, I have added ifnull to
join fields with a random value.
If I run my query directly over mysql, the field CalculatedField1 return values whenever
the field RESOLUTIONDATE is null in the main query.
But when executed in Teiid, the query returns always null for the field
CalculatedField1.
When looking at the jdbc queries executed by Teiid, I found that ifnull is used for the
main query fields but not for the subquery fields, which may be causing a link problem
between main query and subquery.
I have tried to put the ifnull into the subquery but still getting jdbc subquery fields
without the ifnull function.
SELECT DISTINCT
jiraissue.RESOLUTIONDATE AS jiraissue_RESOLUTIONDATE,
jiraissue.CREATED AS jiraissue_CREATED,
CalculatedField1_Sub.CalculatedField1 AS CalculatedField1
FROM tjiradb_D1_VDB_DSModel.tjiradb.jiraissue jiraissue
LEFT JOIN
(SELECT DISTINCT
TIMESTAMPDIFF(
SQL_TSI_MINUTE,
jiraissue_sub.CREATED,
PARSETIMESTAMP('2014-10-03 00:00:00',
'yyyy-MM-dd HH:mm:ss'))
AS CalculatedField1,
jiraissue_sub.RESOLUTIONDATE AS jiraissue_RESOLUTIONDATE,
jiraissue_sub.CREATED AS jiraissue_CREATED
FROM tjiradb_D1_VDB_DSModel.tjiradb.jiraissue jiraissue_sub
WHERE ((((jiraissue_sub.RESOLUTIONDATE IS NULL)))))
CalculatedField1_Sub
ON (IFNULL(jiraissue.RESOLUTIONDATE, -2147483648) =
IFNULL(CalculatedField1_Sub.jiraissue_RESOLUTIONDATE,
-2147483648))
AND (IFNULL(jiraissue.CREATED, -2147483648) =
IFNULL(CalculatedField1_Sub.jiraissue_CREATED,
-2147483648))
Teiid JDBC queries:
SELECT DISTINCT g_0.`RESOLUTIONDATE` AS c_0, g_0.`CREATED` AS c_1,
ifnull(date_format(g_0.`RESOLUTIONDATE`, '%Y-%m-%d %H:%i:%S.%f'),
'-2147483648') AS c_2, ifnull(date_format(g_0.`CREATED`, '%Y-%m-%d
%H:%i:%S.%f'), '-2147483648') AS c_3 FROM `tjiradb`.`jiraissue` AS g_0 ORDER
BY c_2, c_3
SELECT g_0.`CREATED`, g_0.`RESOLUTIONDATE` FROM `tjiradb`.`jiraissue` AS g_0 WHERE
g_0.`RESOLUTIONDATE` IS NULL
Teiid Execution plan
<?xml version='1.0' encoding='UTF-8'?><node
name="LimitNode"><property name="Output
Columns"><value>jiraissue_RESOLUTIONDATE
(timestamp)</value><value>jiraissue_CREATED
(timestamp)</value><value>CalculatedField1
(long)</value></property><property
name="Statistics"><value>Node Output Rows:
10</value><value>Node Next Batch Process Time:
7</value><value>Node Cumulative Next Batch Process Time:
43</value><value>Node Cumulative Process Time:
49</value><value>Node Next Batch Calls: 4</value><value>Node
Blocks: 3</value></property><property name="Cost
Estimates"><value>Estimated Node Cardinality:
10.0</value></property><property name="Child 0"><node
name="SortNode"><property name="Output
Columns"><value>jiraissue_RESOLUTIONDATE
(timestamp)</value><value>jiraissue_CREATED
(timestamp)</value><value>CalculatedField1
(long)</value></property><property
name="Statistics"><value>Node Output Rows:
10</value><value>Node Next Batch Process Time:
13</value><value>Node Cumulative Next Batch Process Time:
42</value><value>Node Cumulative Process Time:
48</value><value>Node Next Batch Calls: 4</value><value>Node
Blocks: 3</value></property><property name="Cost
Estimates"><value>Estimated Node Cardinality:
-1.0</value></property><property name="Child 0"><node
name="ProjectNode"><property name="Output
Columns"><value>jiraissue_RESOLUTIONDATE
(timestamp)</value><value>jiraissue_CREATED
(timestamp)</value><value>CalculatedField1
(long)</value></property><property
name="Statistics"><value>Node Output Rows:
2048</value><value>Node Next Batch Process Time:
0</value><value>Node Cumulative Next Batch Process Time:
35</value><value>Node Cumulative Process Time:
0</value><value>Node Next Batch Calls: 5</value><value>Node
Blocks: 4</value></property><property name="Cost
Estimates"><value>Estimated Node Cardinality:
-1.0</value></property><property name="Child 0"><node
name="JoinNode"><property name="Output
Columns"><value>RESOLUTIONDATE (timestamp)</value><value>CREATED
(timestamp)</value><value>CalculatedField1
(long)</value></property><property
name="Statistics"><value>Node Output Rows:
2048</value><value>Node Next Batch Process Time:
0</value><value>Node Cumulative Next Batch Process Time:
35</value><value>Node Cumulative Process Time:
0</value><value>Node Next Batch Calls: 5</value><value>Node
Blocks: 4</value></property><property name="Cost
Estimates"><value>Estimated Node Cardinality:
-1.0</value></property><property name="Child 0"><node
name="AccessNode"><property name="Output
Columns"><value>RESOLUTIONDATE (timestamp)</value><value>CREATED
(timestamp)</value><value>expr (string)</value><value>expr
(string)</value></property><property
name="Statistics"><value>Node Output Rows:
2048</value><value>Node Next Batch Process Time:
0</value><value>Node Cumulative Next Batch Process Time:
1</value><value>Node Cumulative Process Time: 0</value><value>Node
Next Batch Calls: 10</value><value>Node Blocks:
6</value></property><property name="Cost
Estimates"><value>Estimated Node Cardinality:
-1.0</value></property><property
name="Query"><value>SELECT DISTINCT g_0.RESOLUTIONDATE AS c_0,
g_0.CREATED AS c_1, IFNULL(convert(g_0.RESOLUTIONDATE, string), '-2147483648') AS
c_2, IFNULL(convert(g_0.CREATED, string), '-2147483648') AS c_3 FROM
tjiradb_D1_VDB_DSModel.tjiradb.jiraissue AS g_0 ORDER BY c_2,
c_3</value></property><property name="Model
Name"><value>tjiradb_D1_VDB_DSModel</value></property></node></property><property
name="Child 1"><node name="ProjectNode"><property
name="Output Columns"><value>CalculatedField1
(long)</value><value>jiraissue_RESOLUTIONDATE
(timestamp)</value><value>jiraissue_CREATED
(timestamp)</value><value>CalculatedField11
(long)</value><value>expr (string)</value><value>expr
(string)</value></property><property
name="Statistics"><value>Node Output Rows:
1320</value><value>Node Next Batch Process Time:
22</value><value>Node Cumulative Next Batch Process Time:
18</value><value>Node Cumulative Process Time:
25</value><value>Node Next Batch Calls: 4</value><value>Node
Blocks: 1</value></property><property name="Child 0"><node
name="ProjectNode"><property name="Output
Columns"><value>CalculatedField1
(long)</value><value>jiraissue_RESOLUTIONDATE
(timestamp)</value><value>jiraissue_CREATED
(timestamp)</value><value>CalculatedField11
(long)</value></property><property
name="Statistics"><value>Node Output Rows:
1320</value><value>Node Next Batch Process Time:
9</value><value>Node Cumulative Next Batch Process Time:
3</value><value>Node Cumulative Process Time:
10</value><value>Node Next Batch Calls: 2</value><value>Node
Blocks: 1</value></property><property name="Cost
Estimates"><value>Estimated Node Cardinality:
-1.0</value></property><property name="Child 0"><node
name="AccessNode"><property name="Output
Columns"><value>CREATED (timestamp)</value><value>RESOLUTIONDATE
(timestamp)</value></property><property
name="Statistics"><value>Node Output Rows:
1320</value><value>Node Next Batch Process Time:
8</value><value>Node Cumulative Next Batch Process Time:
1</value><value>Node Cumulative Process Time: 8</value><value>Node
Next Batch Calls: 2</value><value>Node Blocks:
1</value></property><property name="Cost
Estimates"><value>Estimated Node Cardinality:
-1.0</value></property><property
name="Query"><value>SELECT g_0.CREATED, g_0.RESOLUTIONDATE FROM
tjiradb_D1_VDB_DSModel.tjiradb.jiraissue AS g_0 WHERE g_0.RESOLUTIONDATE IS
NULL</value></property><property name="Model
Name"><value>tjiradb_D1_VDB_DSModel</value></property></node></property><property
name="Select Columns"><value>TIMESTAMPDIFF(SQL_TSI_MINUTE,
jiraissue_sub.CREATED, {ts'2014-10-03 00:00:00.0'}) AS
CalculatedField1</value><value>jiraissue_sub.RESOLUTIONDATE AS
jiraissue_RESOLUTIONDATE</value><value>jiraissue_sub.CREATED AS
jiraissue_CREATED</value><value>TIMESTAMPDIFF(SQL_TSI_MINUTE,
jiraissue_sub.CREATED, {ts'2014-10-03 00:00:00.0'}) AS
CalculatedField11</value></property></node></property><property
name="Select
Columns"><value>CalculatedField1_Sub.CalculatedField1</value><value>CalculatedField1_Sub.jiraissue_RESOLUTIONDATE</value><value>CalculatedField1_Sub.jiraissue_CREATED</value><value>CalculatedField1_Sub.CalculatedField11</value><value>IFNULL(convert(CalculatedField1_Sub.jiraissue_RESOLUTIONDATE,
string),
'-2147483648')</value><value>IFNULL(convert(CalculatedField1_Sub.jiraissue_CREATED,
string),
'-2147483648')</value></property></node></property><property
name="Join Strategy"><value>MERGE JOIN
(ALREADY_SORTED/SORT_DISTINCT)</value></property><property name="Join
Type"><value>LEFT OUTER JOIN</value></property><property
name="Join Criteria"><value>IFNULL(convert(jiraissue.RESOLUTIONDATE,
string),
'-2147483648')=IFNULL(convert(CalculatedField1_Sub.jiraissue_RESOLUTIONDATE,
string),
'-2147483648')</value><value>IFNULL(convert(jiraissue.CREATED,
string), '-2147483648')=IFNULL(convert(CalculatedField1_Sub.jiraissue_CREATED,
string),
'-2147483648')</value></property></node></property><property
name="Select Columns"><value>jiraissue.RESOLUTIONDATE AS
jiraissue_RESOLUTIONDATE</value><value>jiraissue.CREATED AS
jiraissue_CREATED</value><value>CalculatedField1_Sub.CalculatedField1 AS
CalculatedField1</value></property></node></property><property
name="Sort
Mode"><value>DUP_REMOVE</value></property></node></property><property
name="Row
Offset"><value>null</value></property><property
name="Row Limit"><value>10</value></property></node>