37 lines
1.1 KiB
PL/PgSQL
37 lines
1.1 KiB
PL/PgSQL
begin;
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update credential_vault_credential
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set external_id = concat(external_id, u&'\ffff')
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where wt_is_sentinel(external_id)
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and not starts_with(reverse(external_id), u&'\ffff');
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alter domain wt_sentinel
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drop constraint wt_sentinel_not_valid;
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drop function wt_is_sentinel;
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create function wt_is_sentinel(string text)
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returns bool
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as $$
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select starts_with(string, u&'\fffe') and starts_with(reverse(string), u&'\ffff');
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$$ language sql
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immutable
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returns null on null input;
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comment on function wt_is_sentinel is
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'wt_is_sentinel returns true if string is a sentinel value';
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alter domain wt_sentinel
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add constraint wt_sentinel_not_valid
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check(
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wt_is_sentinel(value)
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or
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length(trim(trailing u&'\ffff' from trim(leading u&'\fffe ' from value))) > 0
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);
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comment on domain wt_sentinel is
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'A non-empty string with a Unicode prefix of U+FFFE and suffix of U+FFFF to indicate it is a sentinel value';
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drop function wt_to_sentinel; -- wt_to_sentinel is not needed, dropping and not re-creating
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commit;
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