52 lines
2.3 KiB
SQL
52 lines
2.3 KiB
SQL
-- Migration: Add multi-language OCR support
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-- This migration adds support for multiple OCR languages per user
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-- Add new columns for multi-language support
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ALTER TABLE settings
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ADD COLUMN preferred_languages JSONB DEFAULT '["eng"]'::jsonb,
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ADD COLUMN primary_language VARCHAR(10) DEFAULT 'eng',
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ADD COLUMN auto_detect_language_combination BOOLEAN DEFAULT false;
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-- Migrate existing ocr_language data to new preferred_languages array
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UPDATE settings
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SET preferred_languages = jsonb_build_array(COALESCE(ocr_language, 'eng')),
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primary_language = COALESCE(ocr_language, 'eng')
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WHERE preferred_languages = '["eng"]'::jsonb;
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-- Create index for efficient querying of preferred languages
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CREATE INDEX IF NOT EXISTS idx_settings_preferred_languages ON settings USING gin(preferred_languages);
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CREATE INDEX IF NOT EXISTS idx_settings_primary_language ON settings(primary_language);
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-- Add constraint to ensure primary_language is always in preferred_languages
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ALTER TABLE settings
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ADD CONSTRAINT check_primary_language_in_preferred
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CHECK (preferred_languages ? primary_language);
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-- Add constraint to limit number of preferred languages (max 4 for performance)
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ALTER TABLE settings
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ADD CONSTRAINT check_max_preferred_languages
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CHECK (jsonb_array_length(preferred_languages) <= 4);
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-- Add constraint to ensure valid primary language code (3-letter ISO codes)
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ALTER TABLE settings
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ADD CONSTRAINT check_valid_primary_language_code
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CHECK (primary_language ~ '^[a-z]{3}(_[A-Z]{2})?$');
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-- Note: preferred_languages validation is handled in application code due to PostgreSQL subquery limitations in CHECK constraints
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-- Update existing users who don't have settings yet
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INSERT INTO settings (user_id, preferred_languages, primary_language, auto_detect_language_combination)
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SELECT
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u.id,
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'["eng"]'::jsonb,
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'eng',
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false
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FROM users u
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WHERE NOT EXISTS (
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SELECT 1 FROM settings s WHERE s.user_id = u.id
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);
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-- Add comments for documentation
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COMMENT ON COLUMN settings.preferred_languages IS 'Array of 3-letter ISO language codes for OCR processing, max 4 languages';
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COMMENT ON COLUMN settings.primary_language IS 'Primary language code that should be listed first in OCR processing';
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COMMENT ON COLUMN settings.auto_detect_language_combination IS 'Whether to automatically suggest language combinations based on document content'; |