{"Entry":{"collection":"operator","key":"op-2d-date-int4","name":"-(date,int4)","aliases":["-","-(date,int4)"],"metadata":{"aliases":["-","-(date,int4)"],"category":"Date and time","content_hash":"a3cc91f3b54e44a8a5466f9cb2c5f9e94636b3333a1cda73224c27827e72e0de","derived_content_hash":"d3ec81ffea64bd4fe60a74f7c5b952c3ed2eabbd239de3a82744b0dcd8e19cfd","imported_at":"2026-09-30T00:40:40.861934+08:00","name":"-(date,int4)","name_zh":"","slug":"op-2d-date-int4","summary":"subtract"}},"Definition":{"Collection":"operator","Key":"op-2d-date-int4","SourceDatabase":"center","Version":"18","SourceTable":"pg_operator_entry","SourceKey":"op-2d-date-int4","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"aliases":["-","-(date,int4)"],"comparison_data":{"memberships":[],"operator":{"commutator":"","function":"date_mii(date,int4)","hash_join":"f","kind":"b","left_type":"date","merge_join":"f","negator":"","result_type":"date","right_type":"int4","symbol":"-"}},"comparison_hash":"1fb88dc5b840f3ceacf3b4de4563af658393a7634be160c6555e35021e679cf8","description":["subtract"],"description_zh":"相减。","description_zh_html":"\u003cp\u003e相减。\u003c/p\u003e\u003cdl\u003e\u003cdt\u003e种类\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003eb\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e符号\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003e-\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e实现函数\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003edate_mii(date,int4)\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e可用于哈希连接\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003e否\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e左操作数类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e可用于归并连接\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003e否\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e右操作数类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003eint4\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e结果类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/dd\u003e\u003c/dl\u003e\u003ch3\u003e同版本中文手册节选\u003c/h3\u003e\u003cp class=\"title\"\u003e\u003cstrong\u003e表 9.32. 日期/时间操作符\u003c/strong\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\"/zh/docs/18/functions-datetime.html#OPERATORS-DATETIME-TABLE\"\u003e查看完整中文手册与上下文\u003c/a\u003e。\u003c/p\u003e\u003cp\u003e本页开头的中文说明为 PG.CENTER 对源码说明的翻译；手册节选保留对应版本中文文档原文。源码信息及手册示例不代表重新进行过运行测试。\u003c/p\u003e","facts":[{"label":"Left operand","value":"date"},{"label":"Right operand","value":"int4"},{"label":"Result type","value":"date"},{"label":"Implementing function","value":"date_mii(date,int4)"},{"label":"Operator kind","value":"Binary"},{"label":"Hash join candidate","value":"no"},{"label":"Merge join candidate","value":"no"}],"facts_zh":[{"label":"左操作数","value":"date"},{"label":"右操作数","value":"int4"},{"label":"返回类型","value":"date"},{"label":"实现函数","value":"date_mii(date,int4)"},{"label":"操作符种类","value":"Binary"},{"label":"可用于哈希连接","value":"否"},{"label":"可用于归并连接","value":"否"}],"manual_semantics":"Exact operand/result signature matched","memberships":[],"operator":{"commutator":"","function":"date_mii(date,int4)","hash_join":"f","kind":"b","left_type":"date","merge_join":"f","negator":"","result_type":"date","right_type":"int4","symbol":"-"},"related":[{"label":"date data type","url":"/wiki/type/date/?v=18"},{"label":"int4 data type","url":"/wiki/type/int4/?v=18"}],"release":{"catalog_fingerprint":"deec62e0f0c649d9d0d058ddd0b16bf41afffd569c3fd73949ff0971ce5cabd6","channel":"stable","label":"18.6","major":"18","manual_fingerprint":"fefce9e478eb2afe5e17e869492bbedc67dce23d317f0a5257240113d6496ebc","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[{"paragraphs":["Subtract a number of days from a date","date '2001-10-01' - 7 → 2001-09-24"],"title":"English manual definition"},{"paragraphs":["The catalog pg_operator stores information about operators. See CREATE OPERATOR and Section 36.14 for more information."],"title":"Catalog interpretation"}],"sections_zh":[{"paragraphs":["从日期中减去天数","date '2001-10-01' - 7 → 2001-09-24"],"title":"英文手册定义"},{"paragraphs":["目录 pg_operator 存储关于操作符的信息。详见 CREATE OPERATOR 和 第 36.14 节 。"],"title":"目录记录解读"}],"signature":"-(date,int4) → date","source_oid":"1101","sources":[{"label":"Matching PostgreSQL source archive","sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2"},{"label":"PostgreSQL 18 English manual: catalog-pg-operator.html","path":"catalog-pg-operator.html","sha256":"e0b1817914e5e8f9037955cd41e9a43584e9227fcc115784898ecdd9a6c0ecd6","url":"/docs/18/catalog-pg-operator.html"},{"label":"PostgreSQL 18 English manual: catalog-pg-amop.html","path":"catalog-pg-amop.html","sha256":"e65b90ee78eaf4b4da97ce5b08b972cee2e2660b882ec107be22eca47201f7d1","url":"/docs/18/catalog-pg-amop.html"},{"label":"PostgreSQL 18 English manual: functions-datetime.html","path":"functions-datetime.html","sha256":"17632ebd7f646daa96570bdd44ff4c7798176108b449fb8e7e16ca1f895a0e1f","url":"/docs/18/functions-datetime.html#OPERATORS-DATETIME-TABLE"}],"tables":[],"tables_zh":[],"zh_from":{"authored_translation":"authored-translation-of-source-description","body_sha256":"22b32c25919700f6de8f994ac510bb5bcb385ca8f71ef9d27f538e265d48e456","kind":"same-version-chinese-manual-with-authored-translation-of-source-description","manual":{"anchor":"OPERATORS-DATETIME-TABLE","build_id":107,"extraction":"concept-introduction","fragment_sha256":"7290e47fb56c7d37f015a62340d530293e16381ca67cefb9ee62ffd5159301cd","locale":"zh-Hans","page_key":"functions-datetime.html","source_hash":"2340eed8f18e5a5a727bb6bf8f828eedbab527da91082a214ea4f64a3b8750a6","source_revision":"unknown:rendered-translation-baseline","translated_from_revision":null,"translation_revision":"git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b","url":"/zh/docs/18/functions-datetime.html#OPERATORS-DATETIME-TABLE","version":"18"},"runtime_rerun":false,"source_facts_revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}},"ManualEvidence":{"release":{"catalog_fingerprint":"deec62e0f0c649d9d0d058ddd0b16bf41afffd569c3fd73949ff0971ce5cabd6","channel":"stable","label":"18.6","major":"18","manual_fingerprint":"fefce9e478eb2afe5e17e869492bbedc67dce23d317f0a5257240113d6496ebc","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"label":"Matching PostgreSQL source archive","sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2"},{"label":"PostgreSQL 18 English manual: catalog-pg-operator.html","path":"catalog-pg-operator.html","sha256":"e0b1817914e5e8f9037955cd41e9a43584e9227fcc115784898ecdd9a6c0ecd6","url":"/docs/18/catalog-pg-operator.html"},{"label":"PostgreSQL 18 English manual: catalog-pg-amop.html","path":"catalog-pg-amop.html","sha256":"e65b90ee78eaf4b4da97ce5b08b972cee2e2660b882ec107be22eca47201f7d1","url":"/docs/18/catalog-pg-amop.html"},{"label":"PostgreSQL 18 English manual: functions-datetime.html","path":"functions-datetime.html","sha256":"17632ebd7f646daa96570bdd44ff4c7798176108b449fb8e7e16ca1f895a0e1f","url":"/docs/18/functions-datetime.html#OPERATORS-DATETIME-TABLE"}]},"MeasuredEvidence":{}},"Text":{"Collection":"operator","Key":"op-2d-date-int4","SourceDatabase":"center","Version":"18","Locale":"en","Title":"-(date,int4)","Summary":"subtract","BodyHTML":"\u003cp\u003esubtract\u003c/p\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"aaf428ec078948a458c7d2a4cca5ad2741ac64074f5a01a834ae90cf1b30efb5","Payload":{"description":["subtract"],"related":[{"label":"date data type","url":"/wiki/type/date/?v=18"},{"label":"int4 data type","url":"/wiki/type/int4/?v=18"}],"sections":[{"paragraphs":["Subtract a number of days from a date","date '2001-10-01' - 7 → 2001-09-24"],"title":"English manual definition"},{"paragraphs":["The catalog pg_operator stores information about operators. See CREATE OPERATOR and Section 36.14 for more information."],"title":"Catalog interpretation"}],"tables":[]}},"RequestedLocale":"en","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}
