Clean up grammar a bit
authorPeter Eisentraut <[email protected]>
Mon, 29 Jun 2020 08:36:52 +0000 (10:36 +0200)
committerPeter Eisentraut <[email protected]>
Mon, 29 Jun 2020 09:05:00 +0000 (11:05 +0200)
commitaafefb4dcbf79e8cb1439e888a9cdb3dfefa7657
tree5189266e65b962056da6527ef34fd9982c350273
parent68de1440c79d75e529ff8c7395d698252370f992
Clean up grammar a bit

Simplify the grammar specification of substring() and overlay() a bit,
simplify and update some comments.

Reviewed-by: Pavel Stehule <[email protected]>
Reviewed-by: Vik Fearing <[email protected]>
Reviewed-by: Fabien COELHO <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/a15db31c-d0f8-8ce0-9039-578a31758adb%402ndquadrant.com
src/backend/parser/gram.y