[jira] [Created] (FLINK-11399) Parsing nested ROW()s in SQL

["Benoît Paris (JIRA)" <ji...@apache.org>]

Benoît Paris created FLINK-11399:
------------------------------------

             Summary: Parsing nested ROW()s in SQL
                 Key: FLINK-11399
                 URL: https://issues.apache.org/jira/browse/FLINK-11399
             Project: Flink
          Issue Type: Bug
          Components: Table API & SQL
    Affects Versions: 1.7.1
            Reporter: Benoît Paris


Hi!

I'm trying to build a nested structure in SQL (mapping to json with flink-json). This works fine: 
{code:java}
INSERT INTO outputTable
SELECT ROW(col1, col2) 
FROM (
  SELECT 
    col1, 
    ROW(col1, col1) as col2 
  FROM inputTable
) tbl2
{code}
(and I use it as a workaround), but it fails in the simpler version: 
{code:java}
INSERT INTO outputTable
SELECT ROW(col1, ROW(col1, col1)) 
FROM inputTable
{code}
, yielding the following stacktrace: 
{noformat}
Exception in thread "main" org.apache.flink.table.api.SqlParserException: SQL parse failed. Encountered ", ROW" at line 1, column 40.
Was expecting one of:
")" ...
"," <IDENTIFIER> ...
"," <QUOTED_IDENTIFIER> ...
"," <BACK_QUOTED_IDENTIFIER> ...
"," <BRACKET_QUOTED_IDENTIFIER> ...
"," <UNICODE_QUOTED_IDENTIFIER> ...

at org.apache.flink.table.calcite.FlinkPlannerImpl.parse(FlinkPlannerImpl.scala:94)
at org.apache.flink.table.api.TableEnvironment.sqlUpdate(TableEnvironment.scala:803)
at org.apache.flink.table.api.TableEnvironment.sqlUpdate(TableEnvironment.scala:777)
at TestBug.main(TestBug.java:32)
Caused by: org.apache.calcite.sql.parser.SqlParseException: Encountered ", ROW" at line 1, column 40.
Was expecting one of:
")" ...
"," <IDENTIFIER> ...
"," <QUOTED_IDENTIFIER> ...
"," <BACK_QUOTED_IDENTIFIER> ...
"," <BRACKET_QUOTED_IDENTIFIER> ...
"," <UNICODE_QUOTED_IDENTIFIER> ...

at org.apache.calcite.sql.parser.impl.SqlParserImpl.convertException(SqlParserImpl.java:347)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.normalizeException(SqlParserImpl.java:128)
at org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:137)
at org.apache.calcite.sql.parser.SqlParser.parseStmt(SqlParser.java:162)
at org.apache.flink.table.calcite.FlinkPlannerImpl.parse(FlinkPlannerImpl.scala:90)
... 3 more
Caused by: org.apache.calcite.sql.parser.impl.ParseException: Encountered ", ROW" at line 1, column 40.
Was expecting one of:
")" ...
"," <IDENTIFIER> ...
"," <QUOTED_IDENTIFIER> ...
"," <BACK_QUOTED_IDENTIFIER> ...
"," <BRACKET_QUOTED_IDENTIFIER> ...
"," <UNICODE_QUOTED_IDENTIFIER> ...

at org.apache.calcite.sql.parser.impl.SqlParserImpl.generateParseException(SqlParserImpl.java:23019)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.jj_consume_token(SqlParserImpl.java:22836)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.ParenthesizedSimpleIdentifierList(SqlParserImpl.java:4466)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.Expression3(SqlParserImpl.java:3328)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.Expression2b(SqlParserImpl.java:3066)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.Expression2(SqlParserImpl.java:3092)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.Expression(SqlParserImpl.java:3045)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.SelectExpression(SqlParserImpl.java:1525)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.SelectItem(SqlParserImpl.java:1500)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.SelectList(SqlParserImpl.java:1477)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlSelect(SqlParserImpl.java:912)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.LeafQuery(SqlParserImpl.java:552)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.LeafQueryOrExpr(SqlParserImpl.java:3030)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.QueryOrExpr(SqlParserImpl.java:2949)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.OrderedQueryOrExpr(SqlParserImpl.java:463)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlInsert(SqlParserImpl.java:1212)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlStmt(SqlParserImpl.java:847)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlStmtEof(SqlParserImpl.java:869)
at org.apache.calcite.sql.parser.impl.SqlParserImpl.parseSqlStmtEof(SqlParserImpl.java:184)
at org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:130)
... 5 more{noformat}
 

I was thinking it could be a naming/referencing issue; or I was not using ROW() properly, in the json-idiomatic way I want to push on it.

Anyway this is very minor, thanks for all the good work on Flink!

Cheers,

Ben 



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