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https://issues.apache.org/jira/browse/FLINK-20539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17774769#comment-17774769
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lincoln lee commented on FLINK-20539:
-------------------------------------
[~xuyangzhong] assigned to you, thanks for contributing!
> 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
>
> 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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