{"Entry":{"collection":"operator","key":"op-3c40-point-line","name":"\u003c@(point,line)","aliases":["\u003c@","\u003c@(point,line)"],"metadata":{"aliases":["\u003c@","\u003c@(point,line)"],"category":"Geometric","content_hash":"19fa2775ccee6d47751bc3e58257162f5bd4c5f97952c958f685618d2ac32a65","derived_content_hash":"dd3c017e2264d840d5c919585b0ab6cb132cff8cf4f9553a8afbce638c5ee54d","imported_at":"2026-09-30T00:40:42.347172+08:00","name":"\u003c@(point,line)","name_zh":"","slug":"op-3c40-point-line","summary":"point on line"}},"Definition":{"Collection":"operator","Key":"op-3c40-point-line","SourceDatabase":"center","Version":"18","SourceTable":"pg_operator_entry","SourceKey":"op-3c40-point-line","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"aliases":["\u003c@","\u003c@(point,line)"],"comparison_data":{"memberships":[],"operator":{"commutator":"","function":"on_pl(point,line)","hash_join":"f","kind":"b","left_type":"point","merge_join":"f","negator":"","result_type":"bool","right_type":"line","symbol":"\u003c@"}},"comparison_hash":"fc940177d43ca0b662e6eb36863ed8a59d1a6ff39a9438f4b39db74c84dfd965","description":["point on line"],"description_zh":"点位于直线上。","description_zh_html":"\u003cp\u003e点位于直线上。\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\u0026lt;@\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e实现函数\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003eon_pl(point,line)\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\u003epoint\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\u003eline\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e结果类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003ebool\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":"point"},{"label":"Right operand","value":"line"},{"label":"Result type","value":"bool"},{"label":"Implementing function","value":"on_pl(point,line)"},{"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":"point"},{"label":"右操作数","value":"line"},{"label":"返回类型","value":"bool"},{"label":"实现函数","value":"on_pl(point,line)"},{"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":"","function":"on_pl(point,line)","hash_join":"f","kind":"b","left_type":"point","merge_join":"f","negator":"","result_type":"bool","right_type":"line","symbol":"\u003c@"},"related":[{"label":"point data type","url":"/wiki/type/point/?v=18"},{"label":"line data type","url":"/wiki/type/line/?v=18"},{"label":"bool data type","url":"/wiki/type/bool/?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. 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