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https://issues.apache.org/jira/browse/FLINK-18027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17233601#comment-17233601
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Timo Walther commented on FLINK-18027:
--------------------------------------
I investigated this issue a bit. The problem lies clearly on the Calcite side.
A simple workaround is to remove the {{ROW}} keyword. Because {{ROW(f0 + 12,
'Hello world')}} and {{(f0 + 12, 'Hello world')}} are equal expressions. And
`(f0 + 12, 'Hello world')` is parsed correctly. However, a row with a single
field is not supported in this workaround. So we should fix the root cause why
{{ROW(f0 + 12, 'Hello world')}} is not working.
[~danny0405] you are more familiar with the Calcite code base, could we fix
this bug in one of the upcoming Calcite versions?
> ROW value constructor cannot deal with complex expressions
> ----------------------------------------------------------
>
> Key: FLINK-18027
> URL: https://issues.apache.org/jira/browse/FLINK-18027
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Reporter: Benchao Li
> Priority: Major
>
> {code:java}
> create table my_source (
> my_row row<a int, b int, c int>
> ) with (...);
> create table my_sink (
> my_row row<a int, b int>
> ) with (...);
> insert into my_sink
> select ROW(my_row.a, my_row.b)
> from my_source;{code}
> will throw excepions:
> {code:java}
> Exception in thread "main" org.apache.flink.table.api.SqlParserException: SQL
> parse failed. Encountered "." at line 1, column 18.Exception in thread "main"
> org.apache.flink.table.api.SqlParserException: SQL parse failed. Encountered
> "." at line 1, column 18.Was expecting one of: ")" ... "," ... at
> org.apache.flink.table.planner.calcite.CalciteParser.parse(CalciteParser.java:56)
> at
> org.apache.flink.table.planner.delegation.ParserImpl.parse(ParserImpl.java:64)
> at
> org.apache.flink.table.api.internal.TableEnvironmentImpl.sqlQuery(TableEnvironmentImpl.java:627)
> at com.bytedance.demo.KafkaTableSource.main(KafkaTableSource.java:76)Caused
> by: org.apache.calcite.sql.parser.SqlParseException: Encountered "." at line
> 1, column 18.Was expecting one of: ")" ... "," ... at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.convertException(FlinkSqlParserImpl.java:416)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.normalizeException(FlinkSqlParserImpl.java:201)
> at
> org.apache.calcite.sql.parser.SqlParser.handleException(SqlParser.java:148)
> at org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:163) at
> org.apache.calcite.sql.parser.SqlParser.parseStmt(SqlParser.java:188) at
> org.apache.flink.table.planner.calcite.CalciteParser.parse(CalciteParser.java:54)
> ... 3 moreCaused by: org.apache.flink.sql.parser.impl.ParseException:
> Encountered "." at line 1, column 18.Was expecting one of: ")" ... ","
> ... at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.generateParseException(FlinkSqlParserImpl.java:36161)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.jj_consume_token(FlinkSqlParserImpl.java:35975)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.ParenthesizedSimpleIdentifierList(FlinkSqlParserImpl.java:21432)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.Expression3(FlinkSqlParserImpl.java:17164)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.Expression2b(FlinkSqlParserImpl.java:16820)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.Expression2(FlinkSqlParserImpl.java:16861)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.Expression(FlinkSqlParserImpl.java:16792)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.SelectExpression(FlinkSqlParserImpl.java:11091)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.SelectItem(FlinkSqlParserImpl.java:10293)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.SelectList(FlinkSqlParserImpl.java:10267)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.SqlSelect(FlinkSqlParserImpl.java:6943)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.LeafQuery(FlinkSqlParserImpl.java:658)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.LeafQueryOrExpr(FlinkSqlParserImpl.java:16775)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.QueryOrExpr(FlinkSqlParserImpl.java:16238)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.OrderedQueryOrExpr(FlinkSqlParserImpl.java:532)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.SqlStmt(FlinkSqlParserImpl.java:3761)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.SqlStmtEof(FlinkSqlParserImpl.java:3800)
> at
> org.apache.flink.sql.parser.impl.FlinkSqlParserImpl.parseSqlStmtEof(FlinkSqlParserImpl.java:248)
> at org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:161)
> ... 5 more
> {code}
>
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