{"Entry":{"collection":"operator","key":"op-2b-float8-float8","name":"+(float8,float8)","aliases":["+","+(float8,float8)"],"metadata":{"aliases":["+","+(float8,float8)"],"category":"Numeric","content_hash":"f5f686b703c921d8282ca57f8d66c025561136a4b8b0d71fb8dd28be2b9d9dff","derived_content_hash":"b7e827381b96e3e31b62db4a87984ca76936ef668da50961d2c7cbde0bfd3c05","imported_at":"2026-09-30T00:40:40.726953+08:00","name":"+(float8,float8)","name_zh":"","slug":"op-2b-float8-float8","summary":"add"}},"Definition":{"Collection":"operator","Key":"op-2b-float8-float8","SourceDatabase":"center","Version":"18","SourceTable":"pg_operator_entry","SourceKey":"op-2b-float8-float8","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"aliases":["+","+(float8,float8)"],"comparison_data":{"memberships":[],"operator":{"commutator":"+(float8,float8)","function":"float8pl(float8,float8)","hash_join":"f","kind":"b","left_type":"float8","merge_join":"f","negator":"","result_type":"float8","right_type":"float8","symbol":"+"}},"comparison_hash":"a14a83936ff4c69c46a72f3a67ec904c46b3f19fd9c73ae0b0d8f4f839d8d2ad","description":["add"],"description_zh":"相加。","description_zh_html":"\u003cp\u003e相加。\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\u003efloat8pl(float8,float8)\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\u003efloat8\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e交换运算符\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003e+(float8,float8)\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\u003efloat8\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e结果类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003efloat8\u003c/code\u003e\u003c/dd\u003e\u003c/dl\u003e\u003ch3\u003e同版本中文手册节选\u003c/h3\u003e\u003cp\u003e\n   目录 \u003ccode class=\"structname\"\u003epg_operator\u003c/code\u003e 存储关于操作符的信息。详见 \u003ca class=\"xref\" href=\"/zh/docs/18/sql-createoperator.html\"\u003e\u003cspan class=\"refentrytitle\"\u003eCREATE OPERATOR\u003c/span\u003e\u003c/a\u003e 和\u003ca class=\"xref\" href=\"/zh/docs/18/xoper.html\"\u003e第 36.14 节\u003c/a\u003e。\n  \u003c/p\u003e\u003cp\u003e\u003ca href=\"/zh/docs/18/catalog-pg-operator.html\"\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":"float8"},{"label":"Right operand","value":"float8"},{"label":"Result type","value":"float8"},{"label":"Implementing function","value":"float8pl(float8,float8)"},{"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":"float8"},{"label":"右操作数","value":"float8"},{"label":"返回类型","value":"float8"},{"label":"实现函数","value":"float8pl(float8,float8)"},{"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":"Source catalog description; no additional matching manual operator definition claimed","memberships":[],"operator":{"commutator":"+(float8,float8)","function":"float8pl(float8,float8)","hash_join":"f","kind":"b","left_type":"float8","merge_join":"f","negator":"","result_type":"float8","right_type":"float8","symbol":"+"},"related":[{"label":"float8 data type","url":"/wiki/type/float8/?v=18"},{"label":"Commutator: +(float8,float8)","url":"/wiki/operator/op-2b-float8-float8/?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":["The catalog pg_operator stores information about operators. See CREATE OPERATOR and Section 36.14 for more information."],"title":"Catalog interpretation"}],"sections_zh":[{"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":"+(float8,float8) → float8","source_oid":"591","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"}],"tables":[],"tables_zh":[],"zh_from":{"authored_translation":"authored-translation-of-source-description","body_sha256":"073bbe8bbef4b0b7e73b1b02386ffcdd0d1ef3e30352b90590fad9d8bee01872","kind":"same-version-chinese-manual-with-authored-translation-of-source-description","manual":{"anchor":"","build_id":107,"extraction":"concept-introduction","fragment_sha256":"81aed42a595595a07ab55430c00e66eb6d05033809e63b1281b205ed73fb5610","locale":"zh-Hans","page_key":"catalog-pg-operator.html","source_hash":"866547c7d8dd1d830de6c28cee33e2e3adb45288d1d47be58b03fbfb346e9d08","source_revision":"unknown:rendered-translation-baseline","translated_from_revision":null,"translation_revision":"git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b","url":"/zh/docs/18/catalog-pg-operator.html","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"}]},"MeasuredEvidence":{}},"Text":{"Collection":"operator","Key":"op-2b-float8-float8","SourceDatabase":"center","Version":"18","Locale":"en","Title":"+(float8,float8)","Summary":"add","BodyHTML":"\u003cp\u003eadd\u003c/p\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"39db0a645869eb1a925838fb4755e29666f2d229b70028546d5e560ea51b5285","Payload":{"description":["add"],"related":[{"label":"float8 data type","url":"/wiki/type/float8/?v=18"},{"label":"Commutator: +(float8,float8)","url":"/wiki/operator/op-2b-float8-float8/?v=18"}],"sections":[{"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}