fix(query): change unique function type to non-standard sql function

feat: the scan subplan adds the 'dbFName' attribute for metadata refresh

fix: alter table

test: add alter column case for stb

fea: add select json from table

refactor: adjust min shm size

fix(query): set the correct number of expressions.

test:add cases for tmq

fix:invalid data type in schemaless

enh(query): limit the rsp ssdatablock size.

refactor: adjust vnode sync

feat(query): add unique function

3.0

refactor(stream): exec

test:add test cases for tmq

Enh/delete dup code