Timothy Messier
8caaf3e076
This refactors the schema package and subpackages to support editions.
An Edition is a collection of sql migrations. A given boundary binary
can have multiple migration editions. The `schema.Manager` is updated to
apply the necessary migrations in the correct order, leveraging an
Edition's priority to determine the order in which the separate Editions
are applied.
The sql migration files are now nested under a directory for the
edition.
This also switches from the generated code to using embed, which
eliminates the need for the `make migrations` target and the generated
code. As such this commit removes the target and generated code.
See:
https://pkg.go.dev/embed
34 lines
974 B
PL/PgSQL
34 lines
974 B
PL/PgSQL
begin;
|
|
|
|
create function wt_is_sentinel(string text)
|
|
returns bool
|
|
as $$
|
|
select length(trim(leading u&'\fffe ' from string)) > 0 AND starts_with(string, u&'\fffe');
|
|
$$ language sql
|
|
immutable
|
|
returns null on null input;
|
|
comment on function wt_is_sentinel is
|
|
'wt_is_sentinel returns true if string is a sentinel value';
|
|
|
|
create domain wt_sentinel as text
|
|
constraint wt_sentinel_not_valid
|
|
check(
|
|
wt_is_sentinel(value)
|
|
or
|
|
length(trim(u&'\fffe ' from value)) > 0
|
|
);
|
|
comment on domain wt_sentinel is
|
|
'A non-empty string with a Unicode prefix of U+FFFE to indicate it is a sentinel value';
|
|
|
|
create function wt_to_sentinel(string text)
|
|
returns text
|
|
as $$
|
|
select concat(u&'\fffe', trim(ltrim(string, u&'\fffe ')));
|
|
$$ language sql
|
|
immutable
|
|
returns null on null input;
|
|
comment on function wt_to_sentinel is
|
|
'wt_to_sentinel takes string and returns it as a wt_sentinel';
|
|
|
|
commit;
|