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be1389420b
* SQL format checking, 1. * SQL format checking, 2. * SQL format checking, 3. * SQL format checking, 4. * SQL format checking, 5. * Running pg_format * Getting rid of comment. * Upping pg_format version. * Using git ls-files for sql format check. * Fixing sql lints. * Addressing PR comments.
37 lines
1.1 KiB
PL/PgSQL
37 lines
1.1 KiB
PL/PgSQL
-- This file was automatically created by Diesel to setup helper functions
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-- and other internal bookkeeping. This file is safe to edit, any future
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-- changes will be added to existing projects as new migrations.
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-- Sets up a trigger for the given table to automatically set a column called
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-- `updated_at` whenever the row is modified (unless `updated_at` was included
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-- in the modified columns)
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--
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-- # Example
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--
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-- ```sql
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-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW());
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--
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-- SELECT diesel_manage_updated_at('users');
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-- ```
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CREATE OR REPLACE FUNCTION diesel_manage_updated_at (_tbl regclass)
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RETURNS VOID
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AS $$
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BEGIN
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EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
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FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
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END;
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$$
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LANGUAGE plpgsql;
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CREATE OR REPLACE FUNCTION diesel_set_updated_at ()
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RETURNS TRIGGER
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AS $$
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BEGIN
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IF (NEW IS DISTINCT FROM OLD AND NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at) THEN
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NEW.updated_at := CURRENT_TIMESTAMP;
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END IF;
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RETURN NEW;
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END;
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$$
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LANGUAGE plpgsql;
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