429247f407
* [COMPLIANCE] Update Copyright and License Headers * chore: make gen to generate files with copyright headers * chore: update missed copyright headers --------- Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com> Co-authored-by: Justin Nguyen <justin.nguyen@hashicorp.com>
35 lines
1.0 KiB
PL/PgSQL
35 lines
1.0 KiB
PL/PgSQL
-- Copyright IBM Corp. 2020, 2025
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-- SPDX-License-Identifier: BUSL-1.1
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begin;
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create function wt_is_sentinel(string text) returns bool
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as $$
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select length(trim(leading u&'\fffe ' from string)) > 0 AND starts_with(string, u&'\fffe');
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$$ 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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create domain wt_sentinel as text
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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(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 to indicate it is a sentinel value';
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create function wt_to_sentinel(string text) returns text
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as $$
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select concat(u&'\fffe', trim(ltrim(string, u&'\fffe ')));
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$$ language sql
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immutable
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returns null on null input;
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comment on function wt_to_sentinel is
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'wt_to_sentinel takes string and returns it as a wt_sentinel';
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commit;
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