39 lines
911 B
SQL
39 lines
911 B
SQL
\c postgres;
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DO $$
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DECLARE
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view_exists BOOLEAN;
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BEGIN
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-- 检查视图是否已存在
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SELECT EXISTS (
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SELECT 1 FROM information_schema.views
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WHERE table_name = 'country_info_view'
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) INTO view_exists;
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-- 创建或更新视图
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CREATE OR REPLACE VIEW country_info_view AS
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SELECT
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u.id AS country_id,
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n.name AS name,
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c.code AS code,
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u.deleted AS deleted
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FROM
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"country" u
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JOIN
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name n ON u.id = n.country_id
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JOIN
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code c ON u.id = c.country_id
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WHERE
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u.deleted = FALSE;
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-- 根据视图是否已存在输出不同提示
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IF view_exists THEN
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RAISE NOTICE '视图 country_info_view 已更新';
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ELSE
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RAISE NOTICE '视图 country_info_view 已创建';
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END IF;
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EXCEPTION
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WHEN OTHERS THEN
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RAISE NOTICE '处理视图时发生错误: %', SQLERRM;
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END $$;
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