Dmitry Sysolyatin created CALCITE-5633:
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Summary: Allow table functions to be inside select list
Key: CALCITE-5633
URL: https://issues.apache.org/jira/browse/CALCITE-5633
Project: Calcite
Issue Type: Bug
Affects Versions: 1.34.0
Reporter: Dmitry Sysolyatin
Currently, it is impossible to use table functions inside select list.
For example:
{code}
SELECT UNNEST(ARRAY[1,2,3]);
{code}
{code}
SELECT table(generate_series(1,2)); // generate_series is user defined table
function
{code}
Engines like PostgreSQL support it[1]:
{quote}Functions returning sets can also be called in the select list of a
query. For each row that the query generates by itself, the set-returning
function is invoked, and an output row is generated for each element of the
function's result set
{quote}
[1] https://www.postgresql.org/docs/current/xfunc-sql.html
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