xinghuayu007 opened a new issue #4755:
URL: https://github.com/apache/incubator-doris/issues/4755
**Describe the bug**
`select day from test where day='2020-10-32'`, table 'test' is parititioned
by day. In this case, '2020-10-32' will be taken as CastExpr not LiteralExpr,
and condition "day='2020-10-32'" will not be recognized as partitionfilter.
This case will scan all partitions. To avoid scall all partitions, it is better
to filter invalid date value.
**To Reproduce**
Steps to reproduce the behavior:
1. create table:
CREATE TABLE `test` (
`date` datetime NULL COMMENT "日期",
`day` date NULL COMMENT "",
`app_id` varchar(1000) NULL COMMENT "",
`device_id` int(11) 0 comment ""
) ENGINE=OLAP
DUPLICATE KEY(`date`, `day`, `app_id`)
COMMENT "OLAP"
PARTITION BY RANGE(`day`)()
DISTRIBUTED BY HASH(`device_id`) BUCKETS 64
PROPERTIES (
"replication_num" = "1",
"dynamic_partition.enable" = "true",
"dynamic_partition.time_unit" = "DAY",
"dynamic_partition.time_zone" = "Asia/Shanghai",
"dynamic_partition.start" = "-30",
"dynamic_partition.end" = "3",
"dynamic_partition.prefix" = "p",
"dynamic_partition.replication_num" = "1",
"dynamic_partition.buckets" = "32",
"in_memory" = "false",
"storage_format" = "V2"
);
2. insert some data into each partition
3. execute a query which day is invalid, it will scan all partitions
explain select day from test where '2020-10-32' = day;
explain select day from test where 'hello' = day;
4. if day is valid, it will scan some partitions
**Desktop (please complete the following information):**
- OS: [e.g. iOS]
- Browser [e.g. chrome, safari]
- Version [e.g. 22]
**Smartphone (please complete the following information):**
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]
**Additional context**
Add any other context about the problem here.
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