[jira] [Created] (FLINK-28893) Add conv function supported in SQL & Table API

["jackylau (Jira)" <ji...@apache.org>]

jackylau created FLINK-28893:
--------------------------------

             Summary: Add conv function supported in SQL & Table API
                 Key: FLINK-28893
                 URL: https://issues.apache.org/jira/browse/FLINK-28893
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / API
    Affects Versions: 1.16.0
            Reporter: jackylau
             Fix For: 1.16.0


Returns true if {{array}} contains {{{}value{}}}.

Syntax:
{code:java}
conv(number, fromBase, toBase) {code}
Arguments:
 * number: INTEGER_NUMERIC or CHARACTER_STRING family.

 * fromBase: INTEGER_NUMERIC family.
 * toBase: INTEGER_NUMERIC family.

Returns:

Converts numbers between different number bases. Returns a string representation of the number {_}{{N}}{_}, converted from base _{{from_base}}_ to base {_}{{to_base}}{_}. Returns {{NULL}} if any argument is {{{}NULL{}}}. The argument _{{N}}_ is interpreted as an integer, but may be specified as an integer or a string. The minimum base is {{2}} and the maximum base is {{{}36{}}}. If _{{from_base}}_ is a negative number, _{{N}}_ is regarded as a signed number. Otherwise, _{{N}}_ is treated as unsigned. [{{CONV()}}|https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_conv] works with 64-bit precision.

Examples:
{code:java}
> SELECT CONV(100, 10, -8);
 "144"
> SELECT CONV(1111, 2, 10);
 15
> SELECT CONV(100, 2, NULL);
 NULL {code}
See more:
 * pg: [https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_conv]
 * mariadb: https://mariadb.com/kb/en/conv/



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