jackylau created FLINK-28919:
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Summary: Add built-in generate_series function.
Key: FLINK-28919
URL: https://issues.apache.org/jira/browse/FLINK-28919
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Affects Versions: 1.16.0
Reporter: jackylau
Fix For: 1.16.0
Syntax:
{code:java}
conv(number, fromBase, toBase)
generate_series ( start numeric, stop numeric [, step numeric ] ) → setof
numeric{code}
and it does n't support timestamp now, just like mysql
Returns:
When _{{step}}_ is positive, zero rows are returned if _{{start}}_ is greater
than {_}{{stop}}{_}. Conversely, when _{{step}}_ is negative, zero rows are
returned if _{{start}}_ is less than {_}{{stop}}{_}. Zero rows are also
returned if any input is {{{}NULL{}}}. It is an error for _{{step}}_ to be
zero. Some examples follow:
Examples:
{code:java}
SELECT * FROM generate_series(2,4);
generate_series
-----------------
2
3
4
(3 rows)
SELECT * FROM generate_series(5,1,-2);
generate_series
-----------------
5
3
1
(3 rows)
SELECT * FROM generate_series(4,3);
generate_series
-----------------
(0 rows)
SELECT generate_series(1.1, 4, 1.3);
generate_series
-----------------
1.1
2.4
3.7{code}
See more:
* pg: https://www.postgresql.org/docs/current/functions-srf.html
* mysql:
https://docs.microsoft.com/en-us/sql/t-sql/functions/generate-series-transact-sql?view=sql-server-ver16
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