Huansong Fu

Reviewers: there are a bunch of CI failures. I'm fixing those now. Might have some additional changes to the PR. So no hurry on reviewing. ---------- Adapted from patch submitted...

**READY to review** Description ============= Currently adding support for the following cases: ``` CREATE TABLE foo(a int) WITH (appendonly=true); ALTER TABLE foo SET ACCESS METHOD ao_column; -- or: ALTER TABLE...

## Bug Report ### Greenplum version or build Master branch. Local build head 10130c5d1d1d054e1fb4b258e638b02b073ab9c3 Not a problem for 6X. ### Expected behavior For AO table insertion, when row size is...

A FIXME was left noting whether to use AccessShareLock or NoLock when opening child tables to merge their stats. Since we are not updating or even opening the child tables,...

Resolve a FIXME in prepare_AlterTableStmt_for_dispatch()

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Need rework (see my last comment). NOT ready to review yet. --------------- GPDB has specific ALTER TABLE commands for partition tables, which are handled differently than the other AT commands:...

Support distributed transaction isolation for hot standby

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PR description ---------- 1. This PR firstly made two pre-requisite changes: ``` Request syncrep for the forget commit in the remote_apply mode Write nextGxid as-is in checkpoint ``` Please review...