kangkaisen opened a new issue #3854:
URL: https://github.com/apache/incubator-doris/issues/3854
```
CREATE TABLE `t1` (
`a` int(11) NULL COMMENT "",
`b` int(11) NULL COMMENT "",
`c` int(11) NULL COMMENT "",
`d` int(11) NULL COMMENT "",
`e` int(11) NULL COMMENT ""
) ENGINE=OLAP
DUPLICATE KEY(`a`)
COMMENT "OLAP"
DISTRIBUTED BY HASH(`a`) BUCKETS 10
PROPERTIES (
"replication_num" = "1",
"in_memory" = "false",
"storage_format" = "DEFAULT"
);
```
```
INSERT INTO t1(b,e,d,a,c) VALUES(223,221,222,220,224)
INSERT INTO t1(d,e,b,a,c) VALUES(226,227,228,229,225)
INSERT INTO t1(a,c,b,e,d) VALUES(234,231,232,230,233)
INSERT INTO t1(e,b,a,c,d) VALUES(237,236,239,235,238)
INSERT INTO t1(e,c,b,a,d) VALUES(242,244,240,243,241)
INSERT INTO t1(e,d,c,b,a) VALUES(246,248,247,249,245)
```
```
SELECT CASE WHEN c>(SELECT avg(c) FROM t1) THEN a*2 ELSE b*10 END FROM t1
ORDER BY 1;
```
```
2020-06-13 10:58:36,086 WARN 28764 [StmtExecutor.execute():306] execute
Exception
java.lang.NullPointerException: null
at org.apache.doris.analysis.CaseExpr.toThrift(CaseExpr.java:132)
~[palo-fe.jar:?]
at org.apache.doris.analysis.Expr.treeToThriftHelper(Expr.java:879)
~[palo-fe.jar:?]
at org.apache.doris.analysis.Expr.treeToThrift(Expr.java:860)
~[palo-fe.jar:?]
at org.apache.doris.analysis.Expr.treesToThrift(Expr.java:455)
~[palo-fe.jar:?]
at org.apache.doris.planner.SortNode.toThrift(SortNode.java:168)
~[palo-fe.jar:?]
at
org.apache.doris.planner.PlanNode.treeToThriftHelper(PlanNode.java:386)
~[palo-fe.jar:?]
at org.apache.doris.planner.PlanNode.treeToThrift(PlanNode.java:367)
~[palo-fe.jar:?]
at
org.apache.doris.planner.PlanFragment.toThrift(PlanFragment.java:198)
~[palo-fe.jar:?]
at
org.apache.doris.qe.Coordinator$FragmentExecParams.toThrift(Coordinator.java:1485)
~[palo-fe.jar:?]
at org.apache.doris.qe.Coordinator.exec(Coordinator.java:438)
~[palo-fe.jar:?]
at
org.apache.doris.qe.StmtExecutor.handleQueryStmt(StmtExecutor.java:574)
~[palo-fe.jar:?]
at org.apache.doris.qe.StmtExecutor.execute(StmtExecutor.java:242)
~[palo-fe.jar:?]
at
org.apache.doris.qe.ConnectProcessor.handleQuery(ConnectProcessor.java:182)
~[palo-fe.jar:?]
```
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