Dylan He created FLINK-35987:
--------------------------------
Summary: Add ELT function
Key: FLINK-35987
URL: https://issues.apache.org/jira/browse/FLINK-35987
Project: Flink
Issue Type: Sub-task
Components: Table SQL / API
Reporter: Dylan He
Add ELT function.
----
Returns the n-th expression.
Example:
{code:sql}
> SELECT ELT(1, 'scala', 'java');
scala
{code}
Syntax:
{code:sql}
ELT(index, expr...)
{code}
Arguments:
* {{index}}: An INTEGER expression.
* {{expr}}: Any expression that shares a least common type with all {{expr}}..
Returns:
The result has the type of the least common type of all {{expr}}.
{{index}} must be between 1 and the number of {{expr}}. Otherwise, the function
returns an error.
See also:
*
[Spark|https://spark.apache.org/docs/3.5.1/sql-ref-functions-builtin.html#string-functions]
*
[Databricks|https://docs.databricks.com/en/sql/language-manual/functions/elt.html]
*
[MySQL|https://dev.mysql.com/doc/refman/8.4/en/string-functions.html#function_elt]
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