45 lines
1.7 KiB
SQL
45 lines
1.7 KiB
SQL
SET search_path TO atlas, public;
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-- 精确坐标按水印在预览区域内的可移动范围归一化；旧九宫格数据保留原位置。
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ALTER TABLE watermark_template_versions
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ADD COLUMN IF NOT EXISTS position_x NUMERIC(5,4),
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ADD COLUMN IF NOT EXISTS position_y NUMERIC(5,4);
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-- 迁移角色受强制 RLS 限制，回填期间临时关闭并在同一事务内恢复。
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ALTER TABLE watermark_template_versions NO FORCE ROW LEVEL SECURITY;
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ALTER TABLE watermark_template_versions DISABLE ROW LEVEL SECURITY;
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UPDATE watermark_template_versions
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SET position_x = CASE
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WHEN position IN ('top_left', 'middle_left', 'bottom_left') THEN 0
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WHEN position IN ('top_center', 'center', 'bottom_center') THEN 0.5
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ELSE 1
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END,
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position_y = CASE
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WHEN position IN ('top_left', 'top_center', 'top_right') THEN 0
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WHEN position IN ('middle_left', 'center', 'middle_right') THEN 0.5
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ELSE 1
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END
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WHERE position_x IS NULL OR position_y IS NULL;
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ALTER TABLE watermark_template_versions ENABLE ROW LEVEL SECURITY;
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ALTER TABLE watermark_template_versions FORCE ROW LEVEL SECURITY;
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ALTER TABLE watermark_template_versions
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ALTER COLUMN position_x SET NOT NULL,
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ALTER COLUMN position_y SET NOT NULL;
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DO $$
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BEGIN
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IF NOT EXISTS (
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SELECT 1 FROM pg_constraint
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WHERE conrelid = 'atlas.watermark_template_versions'::regclass
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AND conname = 'watermark_template_versions_position_coordinates_check'
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) THEN
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ALTER TABLE watermark_template_versions
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ADD CONSTRAINT watermark_template_versions_position_coordinates_check
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CHECK (position_x BETWEEN 0 AND 1 AND position_y BETWEEN 0 AND 1);
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END IF;
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END
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$$;
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