Andrew

parser,executor: Add current_tso() function

3

### What problem does this PR solve? Issue Number: close #37035 Problem Summary: ### What is changed and how it works? Add new scalar function `current_tso()` ### Check List Tests...

## Enhancement We can only use `show variables like 'tidb_current_ts'` to retrive current tso, can we add scalar function like `current_tso()` for common use.

Open VIM set IM to default

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When open vim，we should always set im to default

Boolean type always show `false` in OpenGaussDB

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## Description Boolean type display error。 ## Your environment When I use pgcli connect to OpenGaussDB，boolean type always show false。 ```sql create table t2(a int,b boolean); insert into t2 values(1,false);...