类型转换的下推错误；聚合函数没有下推

[jd-zhang]

*Issue migrated from trac ticket # 895 www.kunlunbase.com *

component: computing nodes | priority: major

2022-07-11 17:51:40: smith created the issue

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** 复现

-* 问题1

create table t1(a int, b varchar(10));

insert into t1 select 1, ' 01';

select a::text::float =b::float from t1; -- 预期为true

** 问题2

explain select count(distinct a) from t1; -- 预期count(distinct a)
完全下推到存储节点

[jd-zhang]

2022-07-11 18:00:47: smith changed status from new to accepted

[jd-zhang]

2022-07-11 18:02:33: smith edited the issue description

[jd-zhang]

2022-07-11 18:02:33: smith changed title from 类型转换的下推错误 to 类型转换的下推错误；聚合函数没有下推