12 lines
429 B
MySQL
12 lines
429 B
MySQL
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-- Migration 019: Make exercise goal and execution optional
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-- Many wiki exercises have only goal OR execution, not both
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ALTER TABLE exercises
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ALTER COLUMN goal DROP NOT NULL,
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ALTER COLUMN execution DROP NOT NULL;
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-- Add CHECK constraint: at least one of goal/execution must be present
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ALTER TABLE exercises
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ADD CONSTRAINT exercises_goal_or_execution_required
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CHECK (goal IS NOT NULL OR execution IS NOT NULL);
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