[
https://issues.apache.org/jira/browse/FLINK-30687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
tanjialiang updated FLINK-30687:
--------------------------------
Description:
When i try to using Flink SQL like this
{code:java}
CREATE TABLE student
(
id INT NOT NULL,
name STRING,
class_id INT NOT NULL
)
WITH (
'connector' = 'jdbc',
'url' = 'jdbc:mysql://localhost:3306/test',
'table-name' = 'student',
'username' = 'root',
'password' = '12345678'
);
SELECT COUNT(*) FILTER (WHERE class_id = 1) FROM student;
{code}
I found 'FILTER(WHERE class_id = 1)' is not effect.
But when i tried Flink SQL like this, it worked.
{code:java}
SELECT COUNT(*) FROM student WHERE class_id = 1;
or
SELECT COUNT(class_id) FILTER (WHERE class_id = 1) FROM student;{code}
By the way, mysql connector has a bug and fixed in
[FLINK-27268|(https://issues.apache.org/jira/browse/FLINK-27268]. Maybe you try
this demo should cherry-pick this PR first.
was:
When i try to using Flink SQL like this
{code:java}
CREATE TABLE student
(
id INT NOT NULL,
name STRING,
class_id INT NOT NULL
)
WITH (
'connector' = 'jdbc',
'url' = 'jdbc:mysql://localhost:3306/test',
'table-name' = 'student',
'username' = 'root',
'password' = '12345678'
);
SELECT COUNT(*) FILTER (WHERE class_id = 1) FROM student;
{code}
I found 'FILTER(WHERE class_id = 1)' is not effect.
But when i tried Flink SQL like this, it worked.
{code:java}
SELECT COUNT(*) FROM student WHERE class_id = 1;
or
SELECT COUNT(class_id) FILTER (WHERE class_id = 1) FROM student;{code}
By the way, mysql connector has a bug and fixed in
[FLINK-27268|(https://issues.apache.org/jira/browse/FLINK-27268]. Maybe you try
this demo should cherry-pick this PR first.
> FILTER not effect in count(*)
> -----------------------------
>
> Key: FLINK-30687
> URL: https://issues.apache.org/jira/browse/FLINK-30687
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 1.16.0
> Reporter: tanjialiang
> Priority: Major
>
> When i try to using Flink SQL like this
> {code:java}
> CREATE TABLE student
> (
> id INT NOT NULL,
> name STRING,
> class_id INT NOT NULL
> )
> WITH (
> 'connector' = 'jdbc',
> 'url' = 'jdbc:mysql://localhost:3306/test',
> 'table-name' = 'student',
> 'username' = 'root',
> 'password' = '12345678'
> );
> SELECT COUNT(*) FILTER (WHERE class_id = 1) FROM student;
> {code}
>
> I found 'FILTER(WHERE class_id = 1)' is not effect.
> But when i tried Flink SQL like this, it worked.
> {code:java}
> SELECT COUNT(*) FROM student WHERE class_id = 1;
> or
> SELECT COUNT(class_id) FILTER (WHERE class_id = 1) FROM student;{code}
>
> By the way, mysql connector has a bug and fixed in
> [FLINK-27268|(https://issues.apache.org/jira/browse/FLINK-27268]. Maybe you
> try this demo should cherry-pick this PR first.
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