26 lines
660 B
SQL
26 lines
660 B
SQL
create table operation
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(
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id serial primary key
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, redo text not null
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, undo text not null
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, parent integer references operation(id) on delete cascade
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, redo_child integer references operation(id) -- must update before delete
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, redo_cs text not null
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, undo_cs text not null
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);
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insert into operation (id, redo, undo, redo_cs, undo_cs) values (0, '', '', '', '');
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create table current_operation
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(
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id integer primary key references operation(id) -- must update before delete
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);
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insert into current_operation (id) values (0);
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create table snapshot_operation
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(
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id integer primary key references operation(id) on delete cascade
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, tag text not null unique
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);
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