对于运行 9.0.X 的用户，不需要进行转储/恢复。
\n不过，information_schema.referential_constraints 视图的定义中被发现存在一个长期错误。如果你依赖该视图的正确结果，应按下面第一条变更日志条目的说明替换其定义。
不过，如果你是从早于 9.0.4 的版本升级，请参见第 E.20 节。
", "compatibility_count": 0, "label": "9.0.6", "status_label": "历史版本", "eol": "2015-10-08", "age_days": 5413, "support_days": -4010}, "groups": [{"date": "2011-12-05", "build": "9.0.6", "major": "9.0", "minor": 6, "manual": "9.0", "status": "stable", "doc_git": "", "version": "9.0.6", "eol_date": "2015-10-08", "date_text": "2011-12-05", "supported": false, "manual_url": "/docs/9.0/release-9-0-6.html", "source_url": "/docs/release/9.0.6/", "entry_count": 29, "placeholder": false, "content_hash": "16deef75611a51c7e2bbba51c8a9802703b584e2d9fc967ed4654dc9bc64f4fd", "manual_build": "9.0.23", "source_as_of": "", "changes_count": 29, "doc_loaded_at": "2026-09-26T02:56:48.570247", "migration_html": "对于运行 9.0.X 的用户，不需要进行转储/恢复。
\n不过，information_schema.referential_constraints 视图的定义中被发现存在一个长期错误。如果你依赖该视图的正确结果，应按下面第一条变更日志条目的说明替换其定义。
不过，如果你是从早于 9.0.4 的版本升级，请参见第 E.20 节。
", "compatibility_count": 0, "label": "9.0.6", "status_label": "历史版本", "eol": "2015-10-08", "age_days": 5413, "support_days": -4010, "entries": [{"id": "9.0.6-85fb024ac8fe0c73", "cves": [], "html": "修复 information_schema.referential_constraints 视图中的缺陷（Tom Lane）
该视图在把外键约束与它依赖的主键或唯一键约束匹配时不够谨慎。这可能导致某个外键约束完全不被显示、被显示多次，或者声称它依赖于一个并非其实际依赖的约束。
\n由于该视图定义是由 initdb 安装的，仅靠升级不会修复问题。如果需要修复现有安装，可以（以超级用户身份）删除 information_schema 模式，然后通过载入 SHAREDIR/information_schema.sqlSHAREDIR 在哪里，运行 pg_config --sharedir。）这必须在每个要修复的数据库中重复执行。
修复连接到返回标量的函数输出的 UPDATE 或 DELETE 期间可能崩溃的问题（Tom Lane）
只有当目标行被并发更新时才可能崩溃，因此该问题只是间歇性出现。
", "text": "修复连接到返回标量的函数输出的 UPDATE 或 DELETE 期间可能崩溃的问题（Tom Lane） 只有当目标行被并发更新时才可能崩溃，因此该问题只是间歇性出现。", "title": "修复连接到返回标量的函数输出的 UPDATE 或 DELETE 期间可能崩溃的问题", "commits": [], "section": "变更", "category": "bugfix", "source_url": "/docs/release/9.0.6/#id-1.11.6.22.5", "source_hash": "c5022c673435a151aba9fc74a3fbe306fa278a15cc2e885af53357ec4d9305be", "section_path": ["变更"], "commit_groups": [], "identity_text": "Fix possible crash during UPDATE or DELETE that joins to the output of a scalar-returning function (Tom Lane) A crash could only occur if the target row had been concurrently updated, so this problem surfaced only intermittently.", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.0.6/changes/002", "db_id": "51efaa949afc963ee0be46e420af00cd", "patch_ids": [], "statement_hash": "b2ae8b1345784902957b924a8733980e68d820938c3450b7d1a5af8f91899696", "relations": [{"rule": 2, "type": "equivalent", "target": "d108611113394e2d26922009679254f6", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "b2ae8b1345784902957b924a8733980e68d820938c3450b7d1a5af8f91899696"}}], "version": "9.0.6", "category_label": "BUG 修复", "also_in": [], "variants": [], "related_changes": [{"db_id": "d108611113394e2d26922009679254f6", "kind": "equivalent", "version": "9.1.2", "label": "9.1.2", "title": "修复连接到返回标量的函数输出的 UPDATE 或 DELETE 期间可能崩溃的问题", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "b2ae8b1345784902957b924a8733980e68d820938c3450b7d1a5af8f91899696"}, "url": "/docs/compare/?release=9.1.2#9.1.2-d423eea4c859424b", "source_url": "/docs/release/9.1.2/#id-1.11.6.27.5"}]}, {"id": "9.0.6-3006dd53a18cf688", "cves": [], "html": "修复 GIN 索引更新 WAL 记录的错误重放（Tom Lane）
\n这可能导致崩溃后或热备服务器上瞬时找不到索引项。不过，该问题会在该索引下一次 VACUUM 时被修复。
修复 CREATE TABLE dest AS SELECT * FROM src 或 INSERT INTO dest SELECT * FROM src 期间与 TOAST 相关的数据损坏（Tom Lane）
如果表曾被 ALTER TABLE ADD COLUMN 修改过，在某些极端情况下，尝试把它的数据原样复制到另一个表可能产生损坏的结果。该问题只会在 8.4 及更高版本中以这种确切形式出现，但我们也给更早的版本打了补丁，以防有其他代码路径可能触发同一缺陷。
修复热备启动期间可能的失败（Simon Riggs）
", "text": "修复热备启动期间可能的失败（Simon Riggs）", "title": "修复热备启动期间可能的失败", "commits": [], "section": "变更", "category": "bugfix", "source_url": "/docs/release/9.0.6/#id-1.11.6.22.5", "source_hash": "db92f00d8102ba2ebb1b41eeeeeea69f1739176b4030f40dfdf7fec53387df95", "section_path": ["变更"], "commit_groups": [], "identity_text": "Fix possible failures during hot standby startup (Simon Riggs)", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.0.6/changes/005", "db_id": "464bad6cb768185648530f246457d8fc", "patch_ids": [], "statement_hash": "3a734e0738b5035f1c088d7ec3ee6ad860069e0f20e0bd57fd0beedaa26f55e9", "relations": [{"rule": 2, "type": "equivalent", "target": "4279106ec7d14d6a180402dbd6a1aa1a", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "3a734e0738b5035f1c088d7ec3ee6ad860069e0f20e0bd57fd0beedaa26f55e9"}}], "version": "9.0.6", "category_label": "BUG 修复", "also_in": [], "variants": [], "related_changes": [{"db_id": "4279106ec7d14d6a180402dbd6a1aa1a", "kind": "equivalent", "version": "9.1.2", "label": "9.1.2", "title": "修复热备启动期间可能的失败", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "3a734e0738b5035f1c088d7ec3ee6ad860069e0f20e0bd57fd0beedaa26f55e9"}, "url": "/docs/compare/?release=9.1.2#9.1.2-7a6ebca2ca27750d", "source_url": "/docs/release/9.1.2/#id-1.11.6.27.5"}]}, {"id": "9.0.6-a3282037f9e26a02", "cves": [], "html": "当初始快照不完整时更快地启动热备（Simon Riggs）
", "text": "当初始快照不完整时更快地启动热备（Simon Riggs）", "title": "当初始快照不完整时更快地启动热备", "commits": [], "section": "变更", "category": "performance", "source_url": "/docs/release/9.0.6/#id-1.11.6.22.5", "source_hash": "f72d85c544b092d85ada6aefcbfc457157a08a84ac08937b575fd5f5883c76f2", "section_path": ["变更"], "commit_groups": [], "identity_text": "Start hot standby faster when initial snapshot is incomplete (Simon Riggs)", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.0.6/changes/006", "db_id": "381014a2d7eeb21d89dae65da3b88aa1", "patch_ids": [], "statement_hash": "80cc6c7a6ab8b721008337f0b99dcfb42eaf67b987d75449cb1660a68ea82b0f", "relations": [{"rule": 2, "type": "equivalent", "target": "b2692b32fb6238969bfd723747c2a8f7", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "80cc6c7a6ab8b721008337f0b99dcfb42eaf67b987d75449cb1660a68ea82b0f"}}], "version": "9.0.6", "category_label": "性能改进", "also_in": [], "variants": [], "related_changes": [{"db_id": "b2692b32fb6238969bfd723747c2a8f7", "kind": "equivalent", "version": "9.1.2", "label": "9.1.2", "title": "当初始快照不完整时更快地启动热备", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "80cc6c7a6ab8b721008337f0b99dcfb42eaf67b987d75449cb1660a68ea82b0f"}, "url": "/docs/compare/?release=9.1.2#9.1.2-a3282037f9e26a02", "source_url": "/docs/release/9.1.2/#id-1.11.6.27.5"}]}, {"id": "9.0.6-6ca587f387d81b55", "cves": [], "html": "修复从过期 syscache 条目访问 toast 表时的竞态条件（Tom Lane）
\n典型症状是诸如 “missing chunk number 0 for toast value NNNNN in pg_toast_2619” 的瞬时错误，其中引用的 toast 表总是属于某个系统目录。
", "text": "修复从过期 syscache 条目访问 toast 表时的竞态条件（Tom Lane） 典型症状是诸如 “missing chunk number 0 for toast value NNNNN in pg_toast_2619” 的瞬时错误，其中引用的 toast 表总是属于某个系统目录。", "title": "修复从过期 syscache 条目访问 toast 表时的竞态条件", "commits": [], "section": "变更", "category": "bugfix", "source_url": "/docs/release/9.0.6/#id-1.11.6.22.5", "source_hash": "2e3e211a3ea2aa34745ec0d8f27ddef6bb29633a23ac079876909db554cc8c7f", "section_path": ["变更"], "commit_groups": [], "identity_text": "Fix race condition during toast table access from stale syscache entries (Tom Lane) The typical symptom was transient errors like missing chunk number 0 for toast value NNNNN in pg_toast_2619, where the cited toast table would always belong to a system catalog.", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.0.6/changes/007", "db_id": "7135434ccf1f94d793585668d2dbafa6", "patch_ids": [], "statement_hash": "4303d3923718a7e699240eb8653363ab228c015b5b056b2dd7095e99e607273e", "relations": [{"rule": 2, "type": "equivalent", "target": "8322f87d656dbb1125e148c5df89bc42", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "4303d3923718a7e699240eb8653363ab228c015b5b056b2dd7095e99e607273e"}}], "version": "9.0.6", "category_label": "BUG 修复", "also_in": [], "variants": [], "related_changes": [{"db_id": "8322f87d656dbb1125e148c5df89bc42", "kind": "equivalent", "version": "9.1.2", "label": "9.1.2", "title": "修复从过期 syscache 条目访问 toast 表时的竞态条件", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "4303d3923718a7e699240eb8653363ab228c015b5b056b2dd7095e99e607273e"}, "url": "/docs/compare/?release=9.1.2#9.1.2-6ca587f387d81b55", "source_url": "/docs/release/9.1.2/#id-1.11.6.27.5"}]}, {"id": "9.0.6-893476778e22088f", "cves": [], "html": "跟踪函数对参数默认值表达式中所用项的依赖（Tom Lane）
\n此前，被引用的对象可以在未删除或修改函数的情况下被删除，导致函数被使用时行为异常。注意，仅仅安装此更新不会修复缺失的依赖条目；要做到这一点，之后需要对每个这样的函数执行 CREATE OR REPLACE。如果你的函数默认值依赖于非内建对象，建议这样做。
允许内联带多个 OUT 参数的集合返回 SQL 函数（Tom Lane）
", "text": "允许内联带多个 OUT 参数的集合返回 SQL 函数（Tom Lane）", "title": "允许内联带多个 OUT 参数的集合返回 SQL 函数", "commits": [], "section": "变更", "category": "improvement", "source_url": "/docs/release/9.0.6/#id-1.11.6.22.5", "source_hash": "aa5bbedb9571e99f346c111f820072f5f7460c523b7eab77193ee53752126e44", "section_path": ["变更"], "commit_groups": [], "identity_text": "Allow inlining of set-returning SQL functions with multiple OUT parameters (Tom Lane)", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.0.6/changes/009", "db_id": "aec336cc1b647e0433239a1198af40ce", "patch_ids": [], "statement_hash": "b7ca3851513c50c046d73c773ed0ad43ee2e9c7d63875a7c7a2a1b5958f1ec3f", "relations": [{"rule": 2, "type": "equivalent", "target": "541c3a93fe072ef35c169e7ba30f7275", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "b7ca3851513c50c046d73c773ed0ad43ee2e9c7d63875a7c7a2a1b5958f1ec3f"}}], "version": "9.0.6", "category_label": "其他改进", "also_in": [], "variants": [], "related_changes": [{"db_id": "541c3a93fe072ef35c169e7ba30f7275", "kind": "equivalent", "version": "9.1.2", "label": "9.1.2", "title": "允许内联带多个 OUT 参数的集合返回 SQL 函数", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "b7ca3851513c50c046d73c773ed0ad43ee2e9c7d63875a7c7a2a1b5958f1ec3f"}, "url": "/docs/compare/?release=9.1.2#9.1.2-9ee1e8fca9b07877", "source_url": "/docs/release/9.1.2/#id-1.11.6.27.5"}]}, {"id": "9.0.6-10b1995133f3beb7", "cves": [], "html": "不要为连接消除信任延迟唯一索引（Tom Lane、Marti Raudsepp）
\n延迟唯一约束在事务内可能不成立，因此假设它成立可能给出错误的查询结果。
", "text": "不要为连接消除信任延迟唯一索引（Tom Lane、Marti Raudsepp） 延迟唯一约束在事务内可能不成立，因此假设它成立可能给出错误的查询结果。", "title": "不要为连接消除信任延迟唯一索引", "commits": [], "section": "变更", "category": "improvement", "source_url": "/docs/release/9.0.6/#id-1.11.6.22.5", "source_hash": "a92e6fe834794fee8d8ba4b76e0fe51eaa181fd567e66232f6803ba3d64bfa59", "section_path": ["变更"], "commit_groups": [], "identity_text": "Don't trust deferred-unique indexes for join removal (Tom Lane and Marti Raudsepp) A deferred uniqueness constraint might not hold intra-transaction, so assuming that it does could give incorrect query results.", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.0.6/changes/010", "db_id": "8ffb88c8e547d9e1663b4fd0aa0f5025", "patch_ids": [], "statement_hash": "da6ede1f26849a51706bba1754d473c176f65bba1c93650cf79c864d68f7828b", "relations": [{"rule": 2, "type": "equivalent", "target": "0f502bcca16bc46bc5b36787b214a3ec", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "da6ede1f26849a51706bba1754d473c176f65bba1c93650cf79c864d68f7828b"}}], "version": "9.0.6", "category_label": "其他改进", "also_in": [], "variants": [], "related_changes": [{"db_id": "0f502bcca16bc46bc5b36787b214a3ec", "kind": "equivalent", "version": "9.1.2", "label": "9.1.2", "title": "不要为连接消除信任延迟唯一索引", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "da6ede1f26849a51706bba1754d473c176f65bba1c93650cf79c864d68f7828b"}, "url": "/docs/compare/?release=9.1.2#9.1.2-10b1995133f3beb7", "source_url": "/docs/release/9.1.2/#id-1.11.6.27.5"}]}, {"id": "9.0.6-033fe8abb4248406", "cves": [], "html": "让 DatumGetInetP() 解包带 1 字节头的 inet datum，并新增一个不做此事的宏 DatumGetInetPP()（Heikki Linnakangas）
此变更不影响任何核心代码，但可能避免期望 DatumGetInetP() 按常规约定产生已解包 datum 的附加代码中的崩溃。
改进 money 类型输入和输出的区域支持（Tom Lane）
除了不支持所有标准 lc_monetary 格式化选项外，输入和输出函数还不一致，这意味着在某些区域设置下转储的 money 值无法重新读取。
不让 transform_null_equals 影响 CASE foo WHEN NULL ... 构造（Heikki Linnakangas）
transform_null_equals 只应影响用户直接写的 foo = NULL 表达式，而不是这种形式的 CASE 在内部生成的相等性检查。
更改外键触发器的创建顺序，以更好地支持自引用外键（Tom Lane）
\n对于引用自身表的级联外键，行更新会作为一个事件同时触发 ON UPDATE 触发器和 CHECK 触发器。ON UPDATE 触发器必须先执行，否则 CHECK 会检查行的非最终状态，并可能抛出不恰当的错误。然而这些触发器的触发顺序由其名称决定，而由于触发器使用遵循 “RI_ConstraintTrigger_NNNN” 约定的自动生成名称，它们通常按创建顺序排序。彻底的修复需要修改该约定（我们将在 9.2 中做），但在现有版本中更改它似乎有风险。因此此补丁只更改触发器的创建顺序。遇到这类错误的用户应删除并重新创建外键约束，使其触发器处于正确顺序。
避免在跟踪缓冲区分配率时发生浮点下溢（Greg Matthews）
\n虽然这本身无害，但在某些平台上会导致烦人的内核日志消息。
", "text": "避免在跟踪缓冲区分配率时发生浮点下溢（Greg Matthews） 虽然这本身无害，但在某些平台上会导致烦人的内核日志消息。", "title": "避免在跟踪缓冲区分配率时发生浮点下溢", "commits": [], "section": "变更", "category": "improvement", "source_url": "/docs/release/9.0.6/#id-1.11.6.22.5", "source_hash": "5206ddbdf0128e968684164409308aa0e4a779f60cb4af22ed9a821a2dcc6b05", "section_path": ["变更"], "commit_groups": [], "identity_text": "Avoid floating-point underflow while tracking buffer allocation rate (Greg Matthews) While harmless in itself, on certain platforms this would result in annoying kernel log messages.", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.0.6/changes/015", "db_id": "54df9680074d23e2395b887b812446b9", "patch_ids": [], "statement_hash": "8f83e270b485160f65aeb788da3dabf090d68aadc6058a48749bd947e8097edc", "relations": [{"rule": 2, "type": "equivalent", "target": "5a21e745ac07215afa9997ea186d5f42", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "8f83e270b485160f65aeb788da3dabf090d68aadc6058a48749bd947e8097edc"}}], "version": "9.0.6", "category_label": "其他改进", "also_in": [], "variants": [], "related_changes": [{"db_id": "5a21e745ac07215afa9997ea186d5f42", "kind": "equivalent", "version": "9.1.2", "label": "9.1.2", "title": "避免在跟踪缓冲区分配率时发生浮点下溢", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "8f83e270b485160f65aeb788da3dabf090d68aadc6058a48749bd947e8097edc"}, "url": "/docs/compare/?release=9.1.2#9.1.2-03616927317171bb", "source_url": "/docs/release/9.1.2/#id-1.11.6.27.5"}]}, {"id": "9.0.6-0e31cb5366dd90e4", "cves": [], "html": "在 Windows 下启动子进程时保留配置文件名和行号值（Tom Lane）
\n此前它们不会在 pg_settings 视图中正确显示。
修复 ecpg 的 SQLDA 区域中不正确的字段对齐（Zoltan Boszormenyi）
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\n正确处理排他约束、避免 Windows 上的失败、不再对 8.4 数据库中不匹配的 toast 表名报错。
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一些函数错误地假定 palloc() 返回的内存保证被清零。
修复 contrib/unaccent 配置文件解析中的若干错误（Tom Lane）
让 pgstatindex() 及时响应查询取消中断（Robert Haas）
修复 Mac OS X 启动脚本中日志文件名的不正确引号（Sidar Lopez）
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", "text": "缩短详细错误消息中报告的文件名（Peter Eisentraut） 常规构建一直只报告包含错误消息调用的 C 文件的名称，但 VPATH 构建此前报告绝对路径名。", "title": "缩短详细错误消息中报告的文件名", "commits": [], "section": "变更", "category": "improvement", "source_url": "/docs/release/9.0.6/#id-1.11.6.22.5", "source_hash": "0081828b4edcf0ef22fa2ceb5d4fac6b04b27e55aa235ab95225c3c3a0e8e1f4", "section_path": ["变更"], "commit_groups": [], "identity_text": "Shorten file names reported in verbose error messages (Peter Eisentraut) Regular builds have always reported just the name of the C file containing the error message call, but VPATH builds formerly reported an absolute path name.", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.0.6/changes/027", "db_id": "67309ef57a143e750b341962ded85834", "patch_ids": [], "statement_hash": "ef196f53da83dd09fddcd963dd88e7e6c91f24de165efb506f0386a9a409576a", "relations": [{"rule": 2, "type": "equivalent", "target": "3f2d13bc3c5ef6646051ee222766f33c", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "ef196f53da83dd09fddcd963dd88e7e6c91f24de165efb506f0386a9a409576a"}}], "version": "9.0.6", "category_label": "其他改进", "also_in": [], "variants": [], "related_changes": [{"db_id": "3f2d13bc3c5ef6646051ee222766f33c", "kind": "equivalent", "version": "9.1.2", "label": "9.1.2", "title": "缩短详细错误消息中报告的文件名", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "ef196f53da83dd09fddcd963dd88e7e6c91f24de165efb506f0386a9a409576a"}, "url": "/docs/compare/?release=9.1.2#9.1.2-715426b0a9d07255", "source_url": "/docs/release/9.1.2/#id-1.11.6.27.5"}]}, {"id": "9.0.6-1200737128401fc7", "cves": [], "html": "修复中美洲 Windows 时区名的解释（Tom Lane）
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把时区数据文件更新为 tzdata 版本 2011n for DST law changes in Brazil, Cuba, Fiji, Palestine, Russia, and Samoa; also historical corrections for Alaska and British East Africa。
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