wuyunfeng edited a comment on issue #3559:
URL:
https://github.com/apache/incubator-doris/issues/3559#issuecomment-645837038
@blackfox1983
I think maybe the reason maybe is Data-Type is different with
unix_timestamp(date_format(now(), '%Y-%m-%d')),
I just create a table:
```
CREATE EXTERNAL TABLE `fucntion_push` (
`k1` bigint COMMENT "",
`k2` date COMMENT ""
) ENGINE=ELASTICSEARCH
```
create a mapped index in es:
```
PUT function_push
{
"settings": {
"index": {
"number_of_shards": "1",
"number_of_replicas": "0"
}
},
"mappings": {
"doc": {
"properties": {
"k1": {
"type": "long"
},
"k2": {
"type": "date"
}
}
}
}
}
```
SQL :
```
explain select * from fucntion_push where k1 >
unix_timestamp(date_format(now(), '%Y-%m-%d'));
```
explain by Doris:
As we can see date_format(now(), '%Y-%m-%d') can be pre-computed by Doris
FE, but because `k1` datatype is different with the returned type
`unix_timestamp`, all these two `Expr` become `CastExpr`.
another SQL：
```
explain select * from fucntion_push where k2 > date_format(now(),
'%Y-%m-%d');
```
explain by Doris:
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