Piotr Nowojski created FLINK-9617:
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Summary: Provide alias for whole records in Table API
Key: FLINK-9617
URL: https://issues.apache.org/jira/browse/FLINK-9617
Project: Flink
Issue Type: Improvement
Components: Table API & SQL
Affects Versions: 1.5.0
Reporter: Piotr Nowojski
In SQL we can provide an alias for whole table to avoid column name collisions
between two tables. For example:
{code:java}
SELECT
SUM(o.amount * r.rate)
FROM
Orders AS o,
Rates AS r
WHERE r.currency = o.currency{code}
However that's not possible in table API. In Table API user have to provide
aliases for all of the columns, which can be annoying especially if table
consists of tens or even hundred of columns
For example I would expect some feature like this:
{code:java}
val result = orders.as('o)
.join(rates(`o.rowtime).as('r), "o.currency = r.currency")
.select("SUM(o.amount * r.rate) AS amount")
{code}
where \{{rates}} is a TableFunction.
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