8 lines
278 B
MySQL
8 lines
278 B
MySQL
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BEGIN;
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ALTER TABLE word_form_example_texts ALTER COLUMN pos SET NOT NULL;
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ALTER TABLE word_form_example_texts ADD CONSTRAINT pos_is_not_negative
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CHECK (pos >= 0);
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CREATE UNIQUE INDEX word_form_example_texts_pos
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ON word_form_example_texts (example_text_id, pos);
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COMMIT;
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