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https://issues.apache.org/jira/browse/CALCITE-5502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Leonid Chistov reassigned CALCITE-5502:
---------------------------------------
Assignee: Leonid Chistov
> RelToSql converter generates where clause with window expression
> ----------------------------------------------------------------
>
> Key: CALCITE-5502
> URL: https://issues.apache.org/jira/browse/CALCITE-5502
> Project: Calcite
> Issue Type: Bug
> Components: jdbc-adapter
> Affects Versions: 1.32.0
> Reporter: Leonid Chistov
> Assignee: Leonid Chistov
> Priority: Major
>
> Wrong SQL code is generated when Filter (or Calc) node contains window
> expression.
> Example can be demonstrated by adding following code to
> RelToSqlConverterTest.java:
> {code:java}
> @Test void testWindowedFilter() {
> final RelBuilder builder = relBuilder();
> final RelNode root = builder
> .scan("DEPT")
> .filter(
> builder.lessThan(
> builder.aggregateCall(SqlStdOperatorTable.MAX,
> builder.field("DEPTNO"))
> .over()
> .partitionBy(builder.field("DNAME"))
> .toRex(),
> builder.literal(1)
> )
> )
> .build();
> final String expectedSql = "?";
> assertThat(toSql(root), isLinux(expectedSql));
> } {code}
> Generated SQL code will look like:
> {code:java}
> SELECT *
> FROM \"scott\".\"DEPT\"
> WHERE (MAX(\"DEPTNO\") OVER (PARTITION BY \"DNAME\" RANGE BETWEEN UNBOUNDED
> PRECEDING AND UNBOUNDED FOLLOWING)) < 1 {code}
> This is incorrect - window expressions are not allowed in WHERE clause by SQL
> standard and Calcite itself would produce following error message if this SQL
> code would be passed as input:
> {code:java}
> Windowed aggregate expression is illegal in WHERE clause {code}
>
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