Juan Rodriguez
50 lines
1.6 KiB
SQL
50 lines
1.6 KiB
SQL
-- +micrate Up
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-- SQL in section 'Up' is executed when this migration is applied
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-- Step 1: Create a new table with the desired column type
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CREATE TABLE links_new (
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id TEXT PRIMARY KEY NOT NULL,
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user_id TEXT NOT NULL,
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slug VARCHAR(8) UNIQUE NOT NULL,
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url TEXT NOT NULL,
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created_at INTEGER DEFAULT CURRENT_TIMESTAMP NOT NULL,
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updated_at INTEGER DEFAULT CURRENT_TIMESTAMP NOT NULL,
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FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
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);
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-- Step 2: Copy data from the old table to the new table
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INSERT INTO links_new (id, user_id, slug, url, created_at, updated_at)
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SELECT id, user_id, slug, url, created_at, updated_at FROM links;
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-- Step 3: Drop the old table
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DROP TABLE links;
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-- Step 4: Rename the new table to the old table's name
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ALTER TABLE links_new RENAME TO links;
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-- +micrate Down
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-- SQL section 'Down' is executed when this migration is rolled back
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-- Step 1: Create a new table with the original column type
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CREATE TABLE links_old (
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id TEXT PRIMARY KEY NOT NULL,
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user_id TEXT NOT NULL,
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slug VARCHAR(4) UNIQUE NOT NULL,
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url TEXT NOT NULL,
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created_at INTEGER DEFAULT CURRENT_TIMESTAMP NOT NULL,
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updated_at INTEGER DEFAULT CURRENT_TIMESTAMP NOT NULL,
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FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
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);
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-- Step 2: Copy data from the current table to the old table
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INSERT INTO links_old (id, user_id, slug, url, created_at, updated_at)
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SELECT id, user_id, substr(slug, 1, 4), url, created_at, updated_at FROM links;
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-- Step 3: Drop the current table
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DROP TABLE links;
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-- Step 4: Rename the old table to the current table's name
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ALTER TABLE links_old RENAME TO links;
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