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已提交PR补齐缺失的DDL语法资料：https://gitcode.com/opengauss/oGRAC-docs/merge_requests/59

新增17个DDL语句参考页面（docs/zh/sql_reference/ddl/）：

• PL/SQL对象：CREATE/DROP PROCEDURE、CREATE/DROP FUNCTION、CREATE/DROP PACKAGE、CREATE/DROP TYPE
• 租户：CREATE/ALTER/DROP TENANT
• 其他：CREATE INDEXCLUSTER、CREATE/DROP LIBRARY、CREATE CTRLFILE、ALTER PROFILE、PURGE

同时更新了SQL Reference目录的DDL章节。语法依据oGRAC源码（pkg/src/ogsql/parser/gram.y）及回归测试用例提取，示例语句取自回归测试。

自验证：
2026.9.12

回归时间:2026.09.15
回归结论:通过
回归过程: