Caizhi Weng created FLINK-24537:
-----------------------------------
Summary: Array of rows containing constant strings of different
length and an integer throws AssertionError
Key: FLINK-24537
URL: https://issues.apache.org/jira/browse/FLINK-24537
Project: Flink
Issue Type: Bug
Components: Table SQL / Planner
Affects Versions: 1.15.0
Reporter: Caizhi Weng
Add the following test case to {{TableEnvironmentITCase}} to reproduce this
issue.
{code:scala}
@Test
def myTest(): Unit = {
tEnv.executeSql(
"""
|CREATE TABLE T (
| aa INT,
| b INT
|) WITH (
| 'connector' = 'values'
|)
|""".stripMargin)
tEnv.executeSql(
"""
|SELECT array[row('aa', aa), row('b', b)] FROM T
|""".stripMargin).print()
}
{code}
The exception stack is
{code}
java.lang.AssertionError: Conversion to relational algebra failed to preserve
datatypes:
validated type:
RecordType(RecordType(VARCHAR(2) CHARACTER SET "UTF-16LE" NOT NULL EXPR$0,
INTEGER EXPR$1) NOT NULL ARRAY NOT NULL EXPR$0) NOT NULL
converted type:
RecordType(RecordType(VARCHAR(2) CHARACTER SET "UTF-16LE" NOT NULL EXPR$0,
INTEGER NOT NULL EXPR$1) NOT NULL ARRAY NOT NULL EXPR$0) NOT NULL
rel:
LogicalProject(EXPR$0=[ARRAY(CAST(ROW(_UTF-16LE'aa', $0)):RecordType(VARCHAR(2)
CHARACTER SET "UTF-16LE" NOT NULL EXPR$0, INTEGER NOT NULL EXPR$1) NOT NULL,
CAST(ROW(_UTF-16LE'b', $1)):RecordType(VARCHAR(2) CHARACTER SET "UTF-16LE" NOT
NULL EXPR$0, INTEGER NOT NULL EXPR$1) NOT NULL)])
LogicalTableScan(table=[[default_catalog, default_database, T]])
at
org.apache.calcite.sql2rel.SqlToRelConverter.checkConvertedType(SqlToRelConverter.java:467)
at
org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:582)
at
org.apache.flink.table.planner.calcite.FlinkPlannerImpl.org$apache$flink$table$planner$calcite$FlinkPlannerImpl$$rel(FlinkPlannerImpl.scala:181)
at
org.apache.flink.table.planner.calcite.FlinkPlannerImpl.rel(FlinkPlannerImpl.scala:173)
at
org.apache.flink.table.planner.operations.SqlToOperationConverter.toQueryOperation(SqlToOperationConverter.java:1074)
at
org.apache.flink.table.planner.operations.SqlToOperationConverter.convertSqlQuery(SqlToOperationConverter.java:1043)
at
org.apache.flink.table.planner.operations.SqlToOperationConverter.convert(SqlToOperationConverter.java:305)
at
org.apache.flink.table.planner.delegation.ParserImpl.parse(ParserImpl.java:101)
at
org.apache.flink.table.api.internal.TableEnvironmentImpl.executeSql(TableEnvironmentImpl.java:739)
{code}
One interesting aspect is that the following SQL is OK.
{code:sql}
-- constant strings are of same length
SELECT array[row('a', aa), row('b', b)] FROM T
{code}
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