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db migration update #52

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Merged
Buffden merged 1 commit into from
Apr 10, 2026
Merged

db migration update #52

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5 changes: 4 additions & 1 deletion tinyurl/src/main/resources/db/migration/V2__strip_short_code_leading_zeros.sql
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Original file line number Diff line number Diff line change
@@ -1,14 +1,17 @@
-- Remove leading zeros from existing short codes, relax the minimum length constraint,
-- and add creator tracking columns.

-- Drop the old constraint first (required min 4 chars) so the UPDATE below can produce shorter codes
ALTER TABLE url_mappings
DROP CONSTRAINT chk_short_code_format;

-- Strip leading zeros from all existing short codes
UPDATE url_mappings
SET short_code = LTRIM(short_code, '0')
WHERE short_code ~ '^0+.+$';

-- Update the format constraint to allow codes as short as 1 character
ALTER TABLE url_mappings
DROP CONSTRAINT chk_short_code_format,
ADD CONSTRAINT chk_short_code_format CHECK (short_code ~ '^[0-9a-zA-Z_-]{1,32}$');

-- Add creator tracking columns
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