{"Entry":{"collection":"operator","key":"op-2323-lseg-lseg","name":"##(lseg,lseg)","aliases":["##","##(lseg,lseg)"],"metadata":{"aliases":["##","##(lseg,lseg)"],"category":"Geometric","content_hash":"488b59c6fffd86e3a539e3a247187ff52dff90293c5211661faed7ef26348db0","imported_at":"2026-09-30T00:40:40.390276+08:00","name":"##(lseg,lseg)","name_zh":"","slug":"op-2323-lseg-lseg","summary":"closest point to A on B"}},"Definition":{"Collection":"operator","Key":"op-2323-lseg-lseg","SourceDatabase":"center","Version":"18","SourceTable":"pg_operator_entry","SourceKey":"op-2323-lseg-lseg","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"aliases":["##","##(lseg,lseg)"],"comparison_data":{"memberships":[],"operator":{"commutator":"","function":"close_lseg(lseg,lseg)","hash_join":"f","kind":"b","left_type":"lseg","merge_join":"f","negator":"","result_type":"point","right_type":"lseg","symbol":"##"}},"comparison_hash":"7162d3e785cf7051826ebcc87606b70ff3fae34c21ca4da1052b9ee0ebc750e8","description":["closest point to A on B"],"facts":[{"label":"Left operand","value":"lseg"},{"label":"Right operand","value":"lseg"},{"label":"Result type","value":"point"},{"label":"Implementing function","value":"close_lseg(lseg,lseg)"},{"label":"Operator kind","value":"Binary"},{"label":"Hash join candidate","value":"no"},{"label":"Merge join candidate","value":"no"}],"manual_semantics":"Source catalog description; no additional matching manual operator definition claimed","memberships":[],"operator":{"commutator":"","function":"close_lseg(lseg,lseg)","hash_join":"f","kind":"b","left_type":"lseg","merge_join":"f","negator":"","result_type":"point","right_type":"lseg","symbol":"##"},"related":[{"label":"lseg data type","url":"/wiki/type/lseg/?v=18"},{"label":"point data type","url":"/wiki/type/point/?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"}],"signature":"##(lseg,lseg) → point","source_oid":"1578","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":[]},"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-2323-lseg-lseg","SourceDatabase":"center","Version":"18","Locale":"en","Title":"##(lseg,lseg)","Summary":"closest point to A on B","BodyHTML":"\u003cp\u003eclosest point to A on B\u003c/p\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"ada83afdc655a9b4338e61c21a11b1857d0a3473c005b554bbe22836cdda7f1d","Payload":{"description":["closest point to A on B"],"related":[{"label":"lseg data type","url":"/wiki/type/lseg/?v=18"},{"label":"point data type","url":"/wiki/type/point/?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":"zh-Hans","Fallback":true,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}