架构：
客户端 连接器 缓存层 分析器 优化器 执行器 Server 层 存储 引擎 存储 引擎 存储 引擎 存储引擎层 管理连接，权限验证 词法分析，语法分析 执行计划生成，索引选择 操作引擎，返回结果
%22%20d%3D%22M256.4%2C448.3l-99.8-10.5c-15.9%2C0-30.2-6.4-40.6-16.8c-10.3-10.2-16.7-24.4-16.8-40.1%0A%09c-0.3-31.9%2C26.6-42.3%2C58.4-42.3l98.9%2C2.4c34.4%2C0%2C62.4-50.1%2C62.4-84.5v-78.3c0-34.4%2C27.9-51.4%2C62.4-51.4l26.9-11v268.7%0A%09c0%2C27.2-22%2C49.2-49.2%2C63.9H256.4z%20M256.4%2C448.9%22%3E%3C%2Fpath%3E%0A%3Cpath%20d%3D%22M256.4%2C456.9c-57.1%2C0-94.1-8.4-115.2-15.5c-16.4-5.5-43.8-17.3-43.8-34.5V113.6c0-1.3%2C0.3-2.4%2C0.8-3.5%0A%09c-0.5-1.6-0.8-3.3-0.8-5.1c0-17.2%2C27.4-29%2C43.8-34.5c21-7.1%2C58.1-15.5%2C115.2-15.5c57.1%2C0%2C94.1%2C8.4%2C115.2%2C15.5%0A%09C388%2C76%2C415.4%2C87.8%2C415.4%2C105s-27.4%2C29-43.8%2C34.5c-21%2C7.1-58.1%2C15.5-115.2%2C15.5c-57.1%2C0-94.1-8.4-115.2-15.5%0A%09c-8.1-2.7-18.9-7-27.8-12.7v78.9c0.3%2C1.8%2C7.5%2C11%2C35.2%2C19.9c19.9%2C6.4%2C54.7%2C14%2C107.8%2C14c53%2C0%2C87.9-7.6%2C107.8-14%0A%09c27.5-8.9%2C34.8-18%2C35.2-19.9v-58.7c0-4.4%2C3.6-8%2C8-8s8%2C3.6%2C8%2C8v159.5c0%2C0.1%2C0%2C0.1%2C0%2C0.2c-0.4%2C17-28.1%2C28.7-44.5%2C34.2%0A%09c-21.1%2C7-58.1%2C15.4-114.4%2C15.4c-56.3%2C0-93.3-8.4-114.4-15.4c-8.3-2.8-19.5-7.1-28.5-12.9v79c0.2%2C1.7%2C7.2%2C10.9%2C34.5%2C19.8%0A%09c19.8%2C6.4%2C54.7%2C14.1%2C108.5%2C14.1s88.7-7.7%2C108.5-14.1c27.3-8.9%2C34.2-18.1%2C34.5-19.9l0-58.7c0-4.4%2C3.6-8%2C8-8s8%2C3.6%2C8%2C8V407%0A%09c0%2C17.2-27.4%2C29-43.8%2C34.5C350.6%2C448.5%2C313.5%2C456.9%2C256.4%2C456.9z%20M113.5%2C306.3c0.3%2C1.8%2C7.5%2C11%2C35.2%2C19.9c19.9%2C6.4%2C54.7%2C14%2C107.8%2C14%0A%09c53%2C0%2C87.9-7.6%2C107.8-14c27.5-8.9%2C34.8-18%2C35.2-19.9v-79c-9.1%2C5.8-20.2%2C10.2-28.5%2C12.9c-21.1%2C7-58.1%2C15.4-114.4%2C15.4%0A%09c-56.3%2C0-93.3-8.4-114.4-15.4c-8.3-2.8-19.5-7.1-28.5-12.9V306.3z%20M113.5%2C105c0.4%2C1.9%2C7.5%2C11%2C34.5%2C19.8%0A%09c19.8%2C6.4%2C54.7%2C14.1%2C108.5%2C14.1s88.7-7.7%2C108.5-14.1c27-8.8%2C34.1-17.9%2C34.5-19.8c-0.4-1.9-7.5-11-34.5-19.8%0A%09c-19.8-6.4-54.7-14.1-108.5-14.1S167.8%2C78.7%2C148%2C85.2C121%2C94%2C113.9%2C103.1%2C113.5%2C105z%22%3E%3C%2Fpath%3E%0A%3Cpath%20fill%3D%22%23000000%22%20d%3D%22M463.9%2C252.6c0%2C4.4-3.6%2C8-8%2C8h-43c-4.4%2C0-8-3.6-8-8s3.6-8%2C8-8h43C460.3%2C244.6%2C463.9%2C248.2%2C463.9%2C252.6z%0A%09%20M434.4%2C274.6h-73.8c-4.4%2C0-8%2C3.6-8%2C8s3.6%2C8%2C8%2C8h73.8c4.4%2C0%2C8-3.6%2C8-8S438.8%2C274.6%2C434.4%2C274.6z%20M483.5%2C53h-15.8V37.2%0A%09c0-4.4-3.6-8-8-8s-8%2C3.6-8%2C8V53H436c-4.4%2C0-8%2C3.6-8%2C8s3.6%2C8%2C8%2C8h15.8v15.8c0%2C4.4%2C3.6%2C8%2C8%2C8s8-3.6%2C8-8V69h15.8c4.4%2C0%2C8-3.6%2C8-8%0A%09S487.9%2C53%2C483.5%2C53z%20M54.8%2C64h-3.9v-3.9c0-4.4-3.6-8-8-8s-8%2C3.6-8%2C8V64H31c-4.4%2C0-8%2C3.6-8%2C8s3.6%2C8%2C8%2C8h3.9v3.9c0%2C4.4%2C3.6%2C8%2C8%2C8%0A%09s8-3.6%2C8-8V80h3.9c4.4%2C0%2C8-3.6%2C8-8S59.2%2C64%2C54.8%2C64z%20M50.2%2C203.2c-5.9%2C0-10.8%2C4.8-10.8%2C10.8s4.8%2C10.8%2C10.8%2C10.8s10.8-4.8%2C10.8-10.8%0A%09S56.1%2C203.2%2C50.2%2C203.2z%20M50.2%2C273.2c-5.9%2C0-10.8%2C4.8-10.8%2C10.8s4.8%2C10.8%2C10.8%2C10.8s10.8-4.8%2C10.8-10.8S56.1%2C273.2%2C50.2%2C273.2z%0A%09%20M50.2%2C334.2c-5.9%2C0-10.8%2C4.8-10.8%2C10.8s4.8%2C10.8%2C10.8%2C10.8s10.8-4.8%2C10.8-10.8S56.1%2C334.2%2C50.2%2C334.2z%22%3E%3C%2Fpath%3E%0A%3Cpath%20fill%3D%22%23FCCF31%22%20class%3D%22primary-color%22%20d%3D%22M458.4%2C429.2v-34.7H493v34.7H458.4z%20M493%2C481.4v-34.7h-34.7v34.7H493z%20M439.7%2C481.4v-34.7h-34.7v34.7H439.7z%0A%09%22%3E%3C%2Fpath%3E%0A%3C%2Fsvg%3E)