pgsql: Add explicit initialization for all PlannerGlobal fields

Add explicit initialization for all PlannerGlobal fields

When creating a new PlannerGlobal node in standard_planner(), most
fields are explicitly initialized, but a few are not. This doesn't
cause any functional issues, as makeNode() zeroes all fields by
default. However, the inconsistency is undesirable from a clarity and
maintenance perspective.

This patch explicitly initializes the remaining fields to improve
consistency and readability.

Author: Richard Guo <guofenglinux@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Discussion: /messages/by-id/CAMbWs4-TgQHNOiouqGcuHoBqbJjWyx4UxGKxUY3FrF4trGbcPA@mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/2c0ed86d393670c7054d051490063de771f1791e

Modified Files
--------------
src/backend/optimizer/plan/planner.c | 5 +++++
1 file changed, 5 insertions(+)