{"Entry":{"collection":"func","key":"ln","name":"ln","aliases":[],"metadata":{"changed_in":["7.3"],"changes":[{"descriptions_changed":false,"doc_overhaul":false,"from":"7.2","group_changed":null,"signatures":{"added":["ln ( dp or numeric ) → (same as input)"],"removed":["ln ( dp ) → dp"]},"status":"changed","to":"7.3"},{"descriptions_changed":false,"doc_overhaul":true,"from":"12","group_changed":null,"signatures":{"added":[],"removed":[]},"status":"changed","to":"13"}],"content_hash":"1eb5baf2481005abea82584f17f8ad20650391ed67fa8505408c39ce783adcbe","first_version":"7.1","group":"math","group_label":"Mathematical Functions And Operators","groups":["math"],"imported_at":"2026-09-27T17:57:28.22008+08:00","last_version":"20","name":"ln","name_key":"ln","position":2031,"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":"ln ( numeric ) → numeric","signature_count":2,"slug":"ln","source_rev":"b7bd9cda","summary":"Natural logarithm","summary_zh":""}},"Definition":{"Collection":"func","Key":"ln","SourceDatabase":"center","Version":"18","SourceTable":"func","SourceKey":"ln","SourceRevision":"b7bd9cda","Facts":{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"","description_zh_html":"","doc":{"anchor":"FUNCTIONS-MATH-FUNC-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":"Natural logarithm","description_html":"Natural logarithm","description_zh":"","description_zh_html":"","examples":[{"expr":"ln(2.0)","result":"0.6931471805599453"}],"html":"\u003ccode class=\"function\"\u003eln\u003c/code\u003e ( \u003ccode class=\"type\"\u003enumeric\u003c/code\u003e ) → \u003ccode class=\"returnvalue\"\u003enumeric\u003c/code\u003e","returns":"numeric","text":"ln ( numeric ) → numeric","zh_from":""},{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"","description_zh_html":"","examples":[{"expr":"ln(2.0)","result":"0.6931471805599453"}],"html":"\u003ccode class=\"function\"\u003eln\u003c/code\u003e ( \u003ccode class=\"type\"\u003edouble precision\u003c/code\u003e ) → \u003ccode class=\"returnvalue\"\u003edouble precision\u003c/code\u003e","returns":"double precision","text":"ln ( double precision ) → double precision","zh_from":""}],"zh_from":""},"ManualEvidence":{"doc":{"anchor":"FUNCTIONS-MATH-FUNC-TABLE","file":"functions-math.html","slug":"18"}},"MeasuredEvidence":{}},"Text":{"Collection":"func","Key":"ln","SourceDatabase":"pgweb","Version":"18","Locale":"zh-Hans","Title":"ln","Summary":"自然对数","BodyHTML":"自然对数\u003cpre\u003eln ( numeric ) → numeric\u003c/pre\u003e自然对数\u003cpre\u003eln ( double precision ) → double precision\u003c/pre\u003e自然对数","SourceRevision":"ca936764","ContentHash":"2904b409c37ef132ff2e4b9d1e8aef84041f8e6fa70255300bad453d66a1642a","Payload":{"description_zh":"自然对数","description_zh_html":"自然对数","signatures":[{"description_zh":"自然对数","description_zh_html":"自然对数","returns":"numeric","text":"ln ( numeric ) → numeric","zh_from":"doc"},{"description_zh":"自然对数","description_zh_html":"自然对数","returns":"double precision","text":"ln ( 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":"e8df93d39b3fce3dd744f44ea012a6a406661b3e8cb35c0868dd230e407350d0","Text":"ln ( numeric ) → numeric","Returns":"numeric","Payload":{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"","description_zh_html":"","examples":[{"expr":"ln(2.0)","result":"0.6931471805599453"}],"html":"\u003ccode class=\"function\"\u003eln\u003c/code\u003e ( \u003ccode class=\"type\"\u003enumeric\u003c/code\u003e ) → \u003ccode class=\"returnvalue\"\u003enumeric\u003c/code\u003e","returns":"numeric","text":"ln ( numeric ) → numeric","zh_from":""}},{"Version":"18","Ordinal":1,"Hash":"e6b4ba055c72b1ae89d31eb0bdb69b8ab8b4b80072804d4da7a0086e07b8c763","Text":"ln ( double precision ) → double precision","Returns":"double precision","Payload":{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"","description_zh_html":"","examples":[{"expr":"ln(2.0)","result":"0.6931471805599453"}],"html":"\u003ccode class=\"function\"\u003eln\u003c/code\u003e ( \u003ccode class=\"type\"\u003edouble precision\u003c/code\u003e ) → \u003ccode class=\"returnvalue\"\u003edouble precision\u003c/code\u003e","returns":"double precision","text":"ln ( double precision ) → double precision","zh_from":""}}],"Spellings":null,"SQLState":null,"Evidence":null}
