{"Entry":{"collection":"func","key":"atan","name":"atan","aliases":[],"metadata":{"changed_in":[],"changes":[{"descriptions_changed":false,"doc_overhaul":true,"from":"12","group_changed":null,"signatures":{"added":[],"removed":[]},"status":"changed","to":"13"}],"content_hash":"abf3bf5336ae6d7fb1af7347005ffc284e6112a22caecc6fd9a19b25aa1b5262","first_version":"7.1","group":"math","group_label":"Mathematical Functions And Operators","groups":["math"],"imported_at":"2026-09-27T17:57:28.186382+08:00","last_version":"20","name":"atan","name_key":"atan","position":2007,"present_in":["7.1","7.2","7.3","7.4","8.0","8.1","8.2","8.3","8.4","9.0","9.1","9.2","9.3","9.4","9.5","9.6","10","11","12","13","14","15","16","17","18","19","20"],"signature":"atan ( double precision ) → double precision","signature_count":1,"slug":"atan","source_rev":"b7bd9cda","summary":"Inverse tangent, result in radians","summary_zh":""}},"Definition":{"Collection":"func","Key":"atan","SourceDatabase":"center","Version":"18","SourceTable":"func","SourceKey":"atan","SourceRevision":"b7bd9cda","Facts":{"description":"Inverse tangent, result in radians","description_html":"Inverse tangent, result in radians","description_zh":"","description_zh_html":"","doc":{"anchor":"FUNCTIONS-MATH-TRIG-TABLE","file":"functions-math.html","slug":"18"},"group":"math","group_label":"Mathematical Functions And Operators","lang":"en","layout":"table-new","pages":["functions-math.html"],"prose_only":false,"signatures":[{"description":"Inverse tangent, result in radians","description_html":"Inverse tangent, result in radians","description_zh":"","description_zh_html":"","examples":[{"expr":"atan(1)","result":"0.7853981633974483"}],"html":"\u003ccode class=\"function\"\u003eatan\u003c/code\u003e ( \u003ccode class=\"type\"\u003edouble precision\u003c/code\u003e ) → \u003ccode class=\"returnvalue\"\u003edouble precision\u003c/code\u003e","returns":"double precision","text":"atan ( double precision ) → double precision","zh_from":""}],"zh_from":""},"ManualEvidence":{"doc":{"anchor":"FUNCTIONS-MATH-TRIG-TABLE","file":"functions-math.html","slug":"18"}},"MeasuredEvidence":{}},"Text":{"Collection":"func","Key":"atan","SourceDatabase":"pgweb","Version":"18","Locale":"zh-Hans","Title":"atan","Summary":"反正切，结果为弧度","BodyHTML":"反正切，结果为弧度\u003cpre\u003eatan ( double precision ) → double precision\u003c/pre\u003e反正切，结果为弧度","SourceRevision":"ca936764","ContentHash":"6c32fde19db80815f04863a79590b09f3d701b2519c62cf7027ee331bb5a7e63","Payload":{"description_zh":"反正切，结果为弧度","description_zh_html":"反正切，结果为弧度","signatures":[{"description_zh":"反正切，结果为弧度","description_zh_html":"反正切，结果为弧度","returns":"double precision","text":"atan ( double precision ) → double precision","zh_from":"doc"}],"zh_from":"doc"}},"RequestedLocale":"zh-Hans","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20","7.1","7.2","7.3","7.4","8.0","8.1","8.2","8.3","8.4","9.0","9.1","9.2","9.3","9.4","9.5","9.6"],"Locales":["en","zh-Hans"],"Signatures":[{"Version":"18","Ordinal":0,"Hash":"5b4255e334f49ca6a3893904ff2370244faea1b79359f8f5c2f487b158abc8ae","Text":"atan ( double precision ) → double precision","Returns":"double precision","Payload":{"description":"Inverse tangent, result in radians","description_html":"Inverse tangent, result in radians","description_zh":"","description_zh_html":"","examples":[{"expr":"atan(1)","result":"0.7853981633974483"}],"html":"\u003ccode class=\"function\"\u003eatan\u003c/code\u003e ( \u003ccode class=\"type\"\u003edouble precision\u003c/code\u003e ) → \u003ccode class=\"returnvalue\"\u003edouble precision\u003c/code\u003e","returns":"double precision","text":"atan ( double precision ) → double precision","zh_from":""}}],"Spellings":null,"SQLState":null,"Evidence":null}
