{"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","derived_content_hash":"e5ae5b0972b54a028aef1766ee3843afe9f5fadeec7914e2ffb445c8dc8b8602","documentation_refresh":{"batch":"20261113","original_source_rev":"wiki-repair-20261023:e3c2207d6d6a88a6d04e6e100e98022d8e67ea1a4f7c1112bbda6a78558e6694","versions":{"14":"14.25","15":"15.20","16":"16.16","17":"17.12","18":"18.7","19":"19rc2"}},"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"],"repair_provenance":{"original_source_revision":"wiki-repair-20261023:6a27c5df04ad44d857909201bc3608cdfd0d4310d6ead6e2f22ee2943170f226","receipt_sha256":"dd71c053facf74f1a1ef635dd7721105b19e1999604878ec29a6913f67cfb5f4","repair":"wiki-repair-20261023"},"signature":"ln ( numeric ) → numeric","signature_count":2,"slug":"ln","source_rev":"wiki-repair-20261023:e3c2207d6d6a88a6d04e6e100e98022d8e67ea1a4f7c1112bbda6a78558e6694","summary":"Natural logarithm","summary_zh":""}},"Definition":{"Collection":"func","Key":"ln","SourceDatabase":"center","Version":"18","SourceTable":"func","SourceKey":"ln","SourceRevision":"wiki-repair-20261023:e3c2207d6d6a88a6d04e6e100e98022d8e67ea1a4f7c1112bbda6a78558e6694","Facts":{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"自然对数","description_zh_html":"自然对数","doc":{"anchor":"FUNCTIONS-MATH-FUNC-TABLE","file":"functions-math.html","sha256":"80bdcd3a2c7112aadf400e832cc7c8ee55e389d9b3c12e767c3fbb2b3364ef7b","slug":"18"},"documentation_revision":{"inputs":[{"file":"functions-math.html","kind":"same-version-reviewed-manual","locale":"en","sha256":"80bdcd3a2c7112aadf400e832cc7c8ee55e389d9b3c12e767c3fbb2b3364ef7b","version":"18.7"},{"file":"functions-math.html","kind":"same-version-reviewed-manual","locale":"zh-Hans","sha256":"b48c7e1d8abf0f030ad0ef2aa1403db7015a96af265d49a15eaa2f1945a13a5f","version":"18.7"}],"release":"18.7","runtime_remeasured":false,"source_revision":"pgdoc:b9f0e7232f60f380d642ac9b99226606c254b552"},"group":"math","group_label":"数学函数和操作符","lang":"en","layout":"table-new","pages":["functions-math.html"],"prose_only":false,"signatures":[{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"自然对数","description_zh_html":"自然对数","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":"same-version-manual"},{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"自然对数","description_zh_html":"自然对数","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":"same-version-manual"}],"translation_provenance":{"inputs":[{"kind":"current-pgdoc-translation","path":"/Users/vonng/pgsty/pgdoc/zh/18/html/functions-math.html","sha256":"b5f393c537ea29401867ea8b97292650ee67b0dd9e8cde535aae77bc594b3736"}],"kind":"same-version-pgdoc","locale":"zh-Hans","source_revision":"b1b500221dbe5437cfca004d6b04d3f6e422765d","version":"18"},"zh_from":"same-version-manual"},"ManualEvidence":{"doc":{"anchor":"FUNCTIONS-MATH-FUNC-TABLE","file":"functions-math.html","sha256":"80bdcd3a2c7112aadf400e832cc7c8ee55e389d9b3c12e767c3fbb2b3364ef7b","slug":"18"}},"MeasuredEvidence":{}},"Text":{"Collection":"func","Key":"ln","SourceDatabase":"center","Version":"18","Locale":"en","Title":"ln","Summary":"Natural logarithm","BodyHTML":"Natural logarithm","SourceRevision":"wiki-repair-20261023:e3c2207d6d6a88a6d04e6e100e98022d8e67ea1a4f7c1112bbda6a78558e6694","ContentHash":"09f43e091a5b2137a5acf6710de03c436966349243a1b68a1ec34df6fc0e6edc","Payload":{"description":"Natural logarithm","description_html":"Natural logarithm","signatures":[{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"自然对数","description_zh_html":"自然对数","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":"same-version-manual"},{"description":"Natural logarithm","description_html":"Natural logarithm","description_zh":"自然对数","description_zh_html":"自然对数","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":"same-version-manual"}]}},"RequestedLocale":"en","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":"自然对数","description_zh_html":"自然对数","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":"same-version-manual"}},{"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":"自然对数","description_zh_html":"自然对数","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":"same-version-manual"}}],"Spellings":null,"SQLState":null,"Evidence":null}
