135 lines
6.2 KiB
MySQL
135 lines
6.2 KiB
MySQL
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create type audited_column as (column_ text, type_ text);
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create function setup_audit_and_soft_delete( schema text
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, table_ text
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, tracked_columns audited_column[]
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)
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returns void
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language plpgsql as $$
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declare
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col audited_column;
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audit_table text := concat(schema, '.', table_, '_audit');
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do_table_audit text := concat(schema, '.do_', table_, '_audit');
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do_table_soft_delete text := concat(schema, '.do_', table_, '_soft_delete');
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create_audit_table text := '';
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create_do_table_audit text := '';
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create_do_table_soft_delete text := '';
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create_trigger_table_audit text := '';
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create_trigger_table_soft_delete text := '';
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begin
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-- create table X_audit() >>>
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create_audit_table := concat( create_audit_table
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, 'create table ', audit_table, E'\n'
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, ' ( ', table_, ' int not null references ', table_, '(id)', E'\n'
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, ' , kind public.audit_kind not null', E'\n'
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, ' , actor int not null references public.usr (id)', E'\n'
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);
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foreach col in array tracked_columns loop
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create_audit_table := concat( create_audit_table
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, E' , prev_', (col.column_), ' ', (col.type_), E' null\n'
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);
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end loop;
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create_audit_table := concat( create_audit_table
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, ' );'
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);
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-- <<< create table X_audit()
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-- create function do_X_soft_delete() >>>
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create_do_table_soft_delete := concat( create_do_table_soft_delete
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, 'create function ', do_table_soft_delete, E'() returns trigger language plpgsql as \$\$\n'
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, E'begin\n'
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, E' insert into ', audit_table, E'\n'
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, E' (', table_, E', kind, actor)\n'
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, E' values\n'
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, E' (OLD.id, \'delete\', 1);\n'
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, E'\n'
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, E' update ', schema, '.', table_, E'\n'
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, E' set deleted = true\n'
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, E' where id = OLD.id;\n'
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, E'\n'
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, E' return null;\n'
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, E'end;\n'
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, E'\$\$;'
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);
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-- <<< create function do_X_soft_delete()
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-- create function do_X_audit() >>>
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create_do_table_audit := concat( create_do_table_audit
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, 'create function ', do_table_audit, E'() returns trigger language plpgsql as \$\$\n'
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, E'declare\n'
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, E' audit_kind public.audit_kind;\n'
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, E' id int;\n'
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);
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foreach col in array tracked_columns loop
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create_do_table_audit := concat( create_do_table_audit
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, 'prev_', (col.column_), ' ', (col.type_), E';\n'
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);
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end loop;
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create_do_table_audit := concat( create_do_table_audit
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, E'begin\n'
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, E' if (TG_OP = \'INSERT\') then\n'
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, E' id := NEW.id;\n'
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, E' audit_kind := \'create\';\n'
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, E' elsif (TG_OP = \'UPDATE\') then\n'
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, E' id := OLD.id;\n'
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, E' audit_kind := \'modify\';\n'
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);
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foreach col in array tracked_columns loop
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create_do_table_audit := concat( create_do_table_audit
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, ' prev_', (col.column_), ' := OLD.', (col.column_), E';\n'
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);
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end loop;
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create_do_table_audit := concat( create_do_table_audit
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, E' end if;\n'
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, E' insert into public.usr_audit\n'
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, E' (kind, usr, actor'
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);
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foreach col in array tracked_columns loop
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create_do_table_audit := concat( create_do_table_audit
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, ', prev_', (col.column_)
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);
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end loop;
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create_do_table_audit := concat( create_do_table_audit
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, E' )\n'
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, E' values\n'
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, E' (audit_kind, id, 1'
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);
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foreach col in array tracked_columns loop
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create_do_table_audit := concat( create_do_table_audit
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, ', prev_', (col.column_)
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);
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end loop;
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create_do_table_audit := concat( create_do_table_audit
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, E');\n'
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, E' return NEW;\n'
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, E'end;\n'
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, E'\$\$;'
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);
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-- <<< create function do_X_audit()
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create_trigger_table_audit := concat( 'create trigger trigger_', table_, E'_audit\n'
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, 'after insert or update on ', schema, '.', table_, E'\n'
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, 'for each row execute function ', do_table_audit, '();'
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);
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create_trigger_table_soft_delete := concat( 'create trigger trigger_', table_, E'_soft_delete\n'
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, 'before delete on ', schema, '.', table_, E'\n'
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, 'for each row execute function ', do_table_soft_delete, '();'
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);
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execute create_audit_table;
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execute create_do_table_audit;
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execute create_do_table_soft_delete;
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execute create_trigger_table_audit;
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execute create_trigger_table_soft_delete;
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end;
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$$;
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