Add support for mutating an Iceberg branch

[tdcmeehan]

Iceberg supports mutations (upserts, deletes, inserts) on branches. We should allow Presto to specify a branch during mutations so that users can, e.g., perform experiments on data without having to copy the data elsewhere.

Part of #22025

Expected Behavior or Use Case

INSERT INTO iceberg.default.table AT BRANCH 'my-branch' VALUES ...

Presto Component, Service, or Connector

Presto Iceberg connector, and some changes to the parser and SPI to allow a branch to be specified.

Possible Implementation

Example Screenshots (if appropriate):

Context

Hive syntax: https://medium.com/@ayushtkn/apache-hive-4-x-with-iceberg-branches-tags-3d52293ac0bf Spark syntax: https://iceberg.apache.org/docs/latest/branching/#audit-branch

[agrawalreetika]

@tdcmeehan, As I checked for spark-sql syntax, it provides 2 ways to do that -

• Using branch identifier, branch_yourBranch in query,

  
  -- INSERT (1,' a') (2, 'b') into the audit branch.
  INSERT INTO prod.db.table.branch_audit VALUES (1, 'a'), (2, 'b');

-- UPDATE audit branch, UPDATE prod.db.table.branch_audit AS t1 SET val = 'c'

-- DELETE FROM audit branch, DELETE FROM prod.dbl.table.branch_audit WHERE id = 2;

- Setting branch name with `spark.wap.branch` config,

SET spark.wap.branch = audit

INSERT INTO prod.db.table VALUES (3, 'c');

UPDATE prod.db.table AS t1 SET val = 'c';

DELETE FROM prod.db.table WHERE id = 2;

Reference - https://iceberg.apache.org/docs/latest/spark-writes/#writing-to-branches

So from Presto, should we extend the support in Parser for specifying the branch something like below?

INSERT INTO prod.db.table AT BRANCH 'my-branch' VALUES (3, 'c');

UPDATE prod.db.table AS t1 AT BRANCH 'my-branch' SET val = 'c';

DELETE FROM prod.db.table AT BRANCH 'my-branch' WHERE id = 2;