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https://issues.apache.org/jira/browse/FLINK-8863?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xingcan Cui updated FLINK-8863:
-------------------------------
Description:
This issue is a subtask of part two "Full Embedded SQL Client" of the
implementation plan mentioned in
[FLIP-24|https://cwiki.apache.org/confluence/display/FLINK/FLIP-24+-+SQL+Client].
It should be possible to declare user-defined functions in the SQL client. For
now, we limit the registration to classes that implement {{ScalarFunction}},
{{TableFunction}}, {{AggregateFunction}}. Functions that are implemented in SQL
are not part of this issue.
I would suggest to introduce a {{functions}} top-level property. The
declaration could look similar to:
{code}
functions:
- name: testFunction
from: class <-- optional, default: class
class: org.my.MyScalarFunction
constructor: <-- optional, needed for
certain types of functions
- type: DOUBLE
value: 42.0
- class: org.my.Class <-- possibility to create objects
via properties
constructor:
- type: DOUBLE
value: 4.0
- type: BOOLEAN
value: false
- type: STRING
value: "whatever"
- type: INT
value: 1
{code}
was:
This issue is a subtask of part two "Full Embedded SQL Client" of the
implementation plan mentioned in
[FLIP-24|https://cwiki.apache.org/confluence/display/FLINK/FLIP-24+-+SQL+Client].
It should be possible to declare user-defined functions in the SQL client. For
now, we limit the registration to classes that implement {{ScalarFunction}},
{{TableFunction}}, {{AggregateFunction}}. Functions that are implemented in SQL
are not part of this issue.
I would suggest to introduce a {{functions}} top-level property. The
declaration could look similar to:
{code}
functions:
- name: testFunction
from: class <-- optional, default: class
class: org.my.MyScalarFunction
constructor: <-- optional, needed for
certain types of functions
- 42.0
- class: org.my.Class <-- possibility to create objects
via properties
constructor:
- 1
- true
- false
- "whatever"
- type: INT
value: 1
{code}
> Add user-defined function support in SQL Client
> -----------------------------------------------
>
> Key: FLINK-8863
> URL: https://issues.apache.org/jira/browse/FLINK-8863
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Xingcan Cui
> Priority: Major
>
> This issue is a subtask of part two "Full Embedded SQL Client" of the
> implementation plan mentioned in
> [FLIP-24|https://cwiki.apache.org/confluence/display/FLINK/FLIP-24+-+SQL+Client].
> It should be possible to declare user-defined functions in the SQL client.
> For now, we limit the registration to classes that implement
> {{ScalarFunction}}, {{TableFunction}}, {{AggregateFunction}}. Functions that
> are implemented in SQL are not part of this issue.
> I would suggest to introduce a {{functions}} top-level property. The
> declaration could look similar to:
> {code}
> functions:
> - name: testFunction
> from: class <-- optional, default: class
> class: org.my.MyScalarFunction
> constructor: <-- optional, needed for
> certain types of functions
> - type: DOUBLE
> value: 42.0
> - class: org.my.Class <-- possibility to create
> objects via properties
> constructor:
> - type: DOUBLE
> value: 4.0
> - type: BOOLEAN
> value: false
> - type: STRING
> value: "whatever"
> - type: INT
> value: 1
> {code}
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