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https://issues.apache.org/jira/browse/FLINK-20539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17854141#comment-17854141
]
Pouria Pirzadeh commented on FLINK-20539:
-----------------------------------------
[~martijnvisser] Thanks for looking into the issue and merging the fix.
I tried below query on 1.19 and I am still hitting (a similar) issue (See
below).
I need to use CAST so I can create a Row with named fields.
The query works fine without CAST, so I believe the same issue (i.e. Data type
mismatch between Calcite and Flink's type factory) is happening here too.
```
Table t1 = tableEnv.sqlQuery(
"SELECT "
+ "CAST(ROW(name, price) AS ROW<name_val STRING, price_val
BIGINT>) AS col "
+ "FROM orders");
tableEnv.createTemporaryView("t1", t1);
tableEnv.sqlQuery("SELECT * FROM t1").execute().print();
```
Here is the error:
```
Exception in thread "main" java.lang.AssertionError: Conversion to relational
algebra failed to preserve datatypes:
validated type:
RecordType(RecordType:peek_no_expand(VARCHAR(2147483647) CHARACTER SET
"UTF-16LE" name_val, BIGINT price_val) NOT NULL col) NOT NULL
converted type:
RecordType(RecordType(VARCHAR(2147483647) CHARACTER SET "UTF-16LE" name_val,
BIGINT price_val) NOT NULL col) NOT NULL
rel:
LogicalProject(col=[$0])
LogicalProject(col=[CAST(ROW($1, $2)):RecordType(VARCHAR(2147483647)
CHARACTER SET "UTF-16LE" name_val, BIGINT price_val) NOT NULL])
LogicalProject(ts=[$2], name=[$0], price=[$1], rowtime=[$3])
LogicalWatermarkAssigner(rowtime=[rowtime], watermark=[$3])
LogicalProject(name=[$0], price=[$1], ts=[$2],
rowtime=[CAST($3):TIMESTAMP_LTZ(3) *ROWTIME*])
LogicalTableScan(table=[[*anonymous_datastream_source$1*,
metadata=[rowtime]]])
```
> Type mismatch when using ROW in computed column
> -----------------------------------------------
>
> Key: FLINK-20539
> URL: https://issues.apache.org/jira/browse/FLINK-20539
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Timo Walther
> Assignee: xuyang
> Priority: Major
> Labels: auto-unassigned, pull-request-available
> Fix For: 1.19.0, 1.18.2
>
>
> The following SQL:
> {code}
> env.executeSql(
> "CREATE TABLE Orders (\n"
> + " order_number BIGINT,\n"
> + " price INT,\n"
> + " first_name STRING,\n"
> + " last_name STRING,\n"
> + " buyer_name AS ROW(first_name, last_name)\n"
> + ") WITH (\n"
> + " 'connector' = 'datagen'\n"
> + ")");
> env.executeSql("SELECT * FROM Orders").print();
> {code}
> Fails with:
> {code}
> Exception in thread "main" java.lang.AssertionError: Conversion to relational
> algebra failed to preserve datatypes:
> validated type:
> RecordType(BIGINT order_number, INTEGER price, VARCHAR(2147483647) CHARACTER
> SET "UTF-16LE" first_name, VARCHAR(2147483647) CHARACTER SET "UTF-16LE"
> last_name, RecordType:peek_no_expand(VARCHAR(2147483647) CHARACTER SET
> "UTF-16LE" EXPR$0, VARCHAR(2147483647) CHARACTER SET "UTF-16LE" EXPR$1) NOT
> NULL buyer_name) NOT NULL
> converted type:
> RecordType(BIGINT order_number, INTEGER price, VARCHAR(2147483647) CHARACTER
> SET "UTF-16LE" first_name, VARCHAR(2147483647) CHARACTER SET "UTF-16LE"
> last_name, RecordType(VARCHAR(2147483647) CHARACTER SET "UTF-16LE" EXPR$0,
> VARCHAR(2147483647) CHARACTER SET "UTF-16LE" EXPR$1) NOT NULL buyer_name) NOT
> NULL
> rel:
> LogicalProject(order_number=[$0], price=[$1], first_name=[$2],
> last_name=[$3], buyer_name=[ROW($2, $3)])
> LogicalTableScan(table=[[default_catalog, default_database, Orders]])
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.checkConvertedType(SqlToRelConverter.java:467)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:582)
> {code}
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