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https://issues.apache.org/jira/browse/CALCITE-5119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17529714#comment-17529714
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Mitsunori Komatsu commented on CALCITE-5119:
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[~jiajunbernoulli] Thanks! I didn't know Planner#validate(SqlNode) rewrites the
node tree. The validated SqlNode looks good
{code:java}
WITH "cte" AS (SELECT 42 AS "i")
(SELECT "alias"."i" FROM (SELECT "cte"."i" FROM "cte" AS "cte") AS "alias"
ORDER BY "alias"."i") {code}
I'm closing this ticket.
> SqlNode#unparse hides an alias table when using CTE
> ---------------------------------------------------
>
> Key: CALCITE-5119
> URL: https://issues.apache.org/jira/browse/CALCITE-5119
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.30.0
> Reporter: Mitsunori Komatsu
> Priority: Major
>
> Hi team,
> I found SqlNode#unparse hides an alias table when using CTE.
>
> {code:java}
> val planner = Frameworks.getPlanner(config)
> val sql = """
> WITH cte AS (
> select 42 as i
> )
> SELECT i FROM (
> SELECT [i] from cte
> ) AS [alias]
> ORDER BY [alias].[i]
> """.trimIndent()
> val node = planner.parse(sql)
> println(node.toSqlString { c ->
> c.withDialect(PrestoSqlDialect.DEFAULT)
> .withAlwaysUseParentheses(false)
> .withSubQueryStyle(SqlWriter.SubQueryStyle.HYDE)
> .withClauseStartsLine(false)
> .withClauseEndsLine(false)
> }) {code}
> This code outputs the following SQL
> {code:java}
> WITH "cte" AS (SELECT 42 AS "i")
> (SELECT "i" FROM (SELECT "i" FROM "cte") AS "alias")
> ORDER BY "alias"."i"{code}
> The `AS "alias"` is inside a block and the last `ORDER BY` can't find `alias`
> and this query fails with Presto. I think the output should be as follows
> {code:java}
> WITH "cte" AS (SELECT 42 AS "i")
> SELECT "i" FROM (SELECT "i" FROM "cte") AS "alias"
> ORDER BY "alias"."i"{code}
>
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