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https://issues.apache.org/jira/browse/CALCITE-4631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steven Talbot closed CALCITE-4631.
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Resolution: Duplicate
Looks like I missed this is actually a dup
> sql->rel->sql bug with unparsing timestampdiff
> ----------------------------------------------
>
> Key: CALCITE-4631
> URL: https://issues.apache.org/jira/browse/CALCITE-4631
> Project: Calcite
> Issue Type: Bug
> Components: jdbc-adapter
> Reporter: Steven Talbot
> Priority: Major
>
> e.g. the following test in RelToSqlConverter.java demonstrates the end-to-end
> problem:
>
> {code:java}
> @Test void testTimestampDiff() {
> final String query = "select timestampdiff(day, a.\"hire_date\",
> b.\"hire_date\") "
> + "from \"employee\" a join \"employee\" b using (\"employee_id\")";
> final String expected = "TBD, can't get it to generate right now";
> sql(query).ok(expected);
> }{code}
> throws, top of stack:
> {noformat}
> class org.apache.calcite.sql.SqlSyntax$7: SPECIAL
> java.lang.UnsupportedOperationException: class
> org.apache.calcite.sql.SqlSyntax$7: SPECIAL
> at org.apache.calcite.util.Util.needToImplement(Util.java:1101)
> at org.apache.calcite.sql.SqlSyntax$7.unparse(SqlSyntax.java:129)
> at org.apache.calcite.sql.SqlOperator.unparse(SqlOperator.java:383)
> at org.apache.calcite.sql.SqlDialect.unparseCall(SqlDialect.java:455)
> at org.apache.calcite.sql.SqlCall.unparse(SqlCall.java:123)
> at org.apache.calcite.sql.SqlUtil.unparseBinarySyntax(SqlUtil.java:425)
> at org.apache.calcite.sql.SqlSyntax$4.unparse(SqlSyntax.java:78)
> at org.apache.calcite.sql.SqlOperator.unparse(SqlOperator.java:383)
> at org.apache.calcite.sql.SqlDialect.unparseCall(SqlDialect.java:455)
> at org.apache.calcite.sql.SqlCall.unparse(SqlCall.java:126)
> at
> org.apache.calcite.sql.fun.SqlCastFunction.unparse(SqlCastFunction.java:181)
> at org.apache.calcite.sql.SqlDialect.unparseCall(SqlDialect.java:455)
> at org.apache.calcite.sql.SqlCall.unparse(SqlCall.java:126)
> at
> org.apache.calcite.sql.pretty.SqlPrettyWriter$FrameImpl.list2(SqlPrettyWriter.java:1304)
> at
> org.apache.calcite.sql.pretty.SqlPrettyWriter$FrameImpl.list(SqlPrettyWriter.java:1284)
> at
> org.apache.calcite.sql.pretty.SqlPrettyWriter.list(SqlPrettyWriter.java:1081)
> at
> org.apache.calcite.sql.SqlSelectOperator.unparse(SqlSelectOperator.java:154)
> at org.apache.calcite.sql.SqlDialect.unparseCall(SqlDialect.java:455)
> at org.apache.calcite.sql.SqlSelect.unparse(SqlSelect.java:261)
> at org.apache.calcite.sql.SqlNode.toSqlString(SqlNode.java:156)
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverterTest.toSql(RelToSqlConverterTest.java:216){noformat}
> From the debugger, it looks like a SqlKind.REINTERPRET operator gets
> generated by the SqlToRelConverter, and nothing knows how to handle that
> unparsing to SQL.
>
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