lower

Converts the string to all lower case, according to the rules of the database's locale.

English manual coverage begins with PostgreSQL 7.1. Source history and runtime observations have their own recorded version boundaries.

Reading PG 18·Select a recorded version

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

group: string
group label: 字符串函数和操作符
lang: en
layout: table-new
pages: functions-string.html, functions-range.html
prose only: false

Definition PG 18

Converts the string to all lower case, according to the rules of the database's locale.

Signatures and overloads

lower ( text ) → text → text

Converts the string to all lower case, according to the rules of the database's locale.

lower ( anyrange ) → anyelement → anyelement

Extracts the lower bound of the range (NULL if the range is empty or has no lower bound).

lower ( anymultirange ) → anyelement → anyelement

Extracts the lower bound of the multirange (NULL if the multirange is empty or has no lower bound).

Compare versions

Complete source facts

documentation revision

{"inputs":[{"file":"functions-range.html","kind":"same-version-reviewed-manual","locale":"en","sha256":"adc48b5f4dd16fd7079e4b9821ef1877bf4bfa89274da44982672598fe53f9a5","version":"18.7"},{"file":"functions-string.html","kind":"same-version-reviewed-manual","locale":"en","sha256":"dbe9f91e55c35969d99a8d2697b6f7bd5388a24ccc2b89706a666f176025f1e2","version":"18.7"},{"file":"functions-range.html","kind":"same-version-reviewed-manual","locale":"zh-Hans","sha256":"0cf73372e4a803a8728ac799c436646b9273bfbf0bf645cee112401eaff4de59","version":"18.7"},{"file":"functions-string.html","kind":"same-version-reviewed-manual","locale":"zh-Hans","sha256":"7eecd3bb343149124be0476a539f3c682476eab2a15489a0e0ad06fbb769ea9e","version":"18.7"}],"release":"18.7","runtime_remeasured":false,"source_revision":"pgdoc:b9f0e7232f60f380d642ac9b99226606c254b552"}

Source references

Original manual reference

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:7a9323ea7ba1ea811add7d546d9ed2113df833e77efbb0b33f9863520af999a9

Text language: en · wiki-repair-20261023:7a9323ea7ba1ea811add7d546d9ed2113df833e77efbb0b33f9863520af999a9