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Refactor timestamp2timestamptz_opt_error()

author Alexander Korotkov <akorotkov@postgresql.org>

2019年10月21日 20:03:55 +0000 (23:03 +0300)

committer Alexander Korotkov <akorotkov@postgresql.org>

2019年10月21日 20:07:07 +0000 (23:07 +0300)

commit a6888fde7f0dbe865559b31ba2ce01ac1150debe

tree e746b17a4f3c0a26380a87b0670525e52846a015 tree

parent db477b691dc4e80bc8379d976ef53a0aa0afe4c0 commit | diff

Refactor timestamp2timestamptz_opt_error()

While casting from timestamp to timestamptz we do timestamp2tm() then
tm2timestamp(). This commit eliminates call to tm2timestamp(). Instead, it
directly applies timezone offset to the original timestamp value. That makes
upcoming datetime overflow handling in jsonpath easier. That should also save
us some CPU cycles.

Discussion: https://postgr.es/m/CAPpHfdvRPRh_mTGar5WmDeRZ%3DU5dOXHdxspYYD%3D76m3knNGjXA%40mail.gmail.com
Author: Alexander Korotkov
Reviewed-by: Tom Lane

src/backend/utils/adt/timestamp.c diff | blob | blame | history

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