用于根据IF ELSEIF条件更新每行的postgresql函数

CREATE OR REPLACE FUNCTION update_data_based_on_condition()
RETURNS VOID AS $$
DECLARE
    row_data RECORD;
BEGIN
    -- 获取需要更新的数据
    FOR row_data IN SELECT * FROM your_table
    LOOP
        -- 根据条件更新每行数据
        IF row_data.column1 = 'condition1' THEN
            UPDATE your_table SET column2 = 'value1' WHERE id = row_data.id;
        ELSIF row_data.column1 = 'condition2' THEN
            UPDATE your_table SET column2 = 'value2' WHERE id = row_data.id;
        ELSE
            UPDATE your_table SET column2 = 'default_value' WHERE id = row_data.id;
        END IF;
    END LOOP;
END;
$$ LANGUAGE plpgsql;