Add EmitWarningsOnPlaceholders("age") (#1997)

[shinyaaa]

Added EmitWarningsOnPlaceholders("age") to warn when an undefined GUC parameter is set for a placeholder named "age".

Warnings are issued when PostgreSQL starts and when SET statements are executed.

When PostgreSQL starts

2024-08-01 18:32:31.220 JST [2039799] WARNING: invalid configuration parameter name "age.invalid_parameter", removing it

When SET statement is executed

ERROR: invalid configuration parameter name "age.invalid_parameter"
DETAIL: "age" is a reserved prefix.

Regression tests were added.

[jrgemignani]

@shinyaaa You will need to rebase and force update your PR. Please see PR #2007 for more information.

[jrgemignani]

@shinyaaa There appears to be an issue with the build regression for this one :( Please look into it when you have an opportunity -

[rafsun42]

Hi @shinyaaa the regression tests are failing for PG13 and 14.

[shinyaaa]

@jrgemignani @rafsun42 Sorry.

Until v14, it seems to warn only when PostgreSQL starts. Warnings in SET statements are implemented in this commit. Therefore, the regression test has been removed.

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This PR was closed because it has been stalled for further 14 days with no activity