PostgreSQL 15 preview - 订阅端新增选项disable_on_error控制是否重试订阅

PG15之前的版本前，逻辑复制中，如果订阅端发生唯一性约束冲突，订阅端会一直重试，PG15增加选项 disable_on_error 去控制是否重试，默认情况为false, 表示不会disable订阅。

提交日志

commit 705e20f8550c0e8e47c0b6b20b5f5ffd6ffd9e33
Author: Amit Kapila <akapila@postgresql.org>
Date:   Mon Mar 14 09:32:40 2022 +0530

    Optionally disable subscriptions on error.

    Logical replication apply workers for a subscription can easily get stuck
    in an infinite loop of attempting to apply a change, triggering an error
    (such as a constraint violation), exiting with the error written to the
    subscription server log, and restarting.

    To partially remedy the situation, this patch adds a new subscription
    option named 'disable_on_error'. To be consistent with old behavior, this
    option defaults to false. When true, both the tablesync worker and apply
    worker catch any errors thrown and disable the subscription in order to
    break the loop. The error is still also written in the logs.

    Once the subscription is disabled, users can either manually resolve the
    conflict/error or skip the conflicting transaction by using
    pg_replication_origin_advance() function. After resolving the conflict,
    users need to enable the subscription to allow apply process to proceed.

    Author: Osumi Takamichi and Mark Dilger
    Reviewed-by: Greg Nancarrow, Vignesh C, Amit Kapila, Wang wei, Tang Haiying, Peter Smith, Masahiko Sawada, Shi Yu
    Discussion : https://postgr.es/m/DB35438F-9356-4841-89A0-412709EBD3AB%40enterprisedb.com