[FEATURE] CBRT scalar function in new engine

[acarbonetto]

Is your feature request related to a problem?
The following statement fails because CBRT is not implemented in the new v2 engine

{
    "query": "SELECT CBRT(value);"
}

error:

{
  "error": {
    "reason": "Invalid SQL query",
    "details": "Cannot invoke \"com.alibaba.druid.sql.ast.statement.SQLTableSource.getAlias()\" because the return value of \"com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock.getFrom()\" is null",
    "type": "NullPointerException"
  },
  "status": 400
}

What solution would you like?
Something like: https://www.w3resource.com/PostgreSQL/cbrt-function.php

What alternatives have you considered?

{
    "query": "SELECT CBRT(value) FROM bigint;"
}

does work, but this is using the legacy engine for SQL

Do you have any additional context?
n/a

[Yury-Fridlyand]

WIP: Bit-Quill#166

[margarit-h]

PR: #1081

[margarit-h]

PR for adding CBRT() to the PPL: #1097