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Clarify documentation of ceil/ceiling/floor functions.

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Document these as "nearest integer >= argument" and "nearest integer <=
argument", which will hopefully be less confusing than the old formulation.
New wording is from Matlab via Dean Rasheed.

I changed the pg_description entries as well as the SGML docs.  In the
back branches, this will only affect installations initdb'd in the future,
but it should be harmless otherwise.

Discussion: <CAEZATCW3yzJo-NMSiQs5jXNFbTsCEftZS-Og8=FvFdiU+kYuSA@mail.gmail.com>
This commit is contained in:
Tom Lane
2016-06-09 11:58:00 -04:00
parent b5dd25b77a
commit bca0f60de4
2 changed files with 9 additions and 9 deletions
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6
doc/src/sgml/func.sgml
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@ -659,7 +659,7 @@
<literal><function>ceil(<type>dp</type> or <type>numeric</type>)</function></literal>
</entry>
<entry>(same as input)</entry>
<entry>smallest integer not less than argument</entry>
<entry>nearest integer greater than or equal to argument</entry>
<entry><literal>ceil(-42.8)</literal></entry>
<entry><literal>-42</literal></entry>
</row>
@ -672,7 +672,7 @@
<literal><function>ceiling(<type>dp</type> or <type>numeric</type>)</function></literal>
</entry>
<entry>(same as input)</entry>
<entry>smallest integer not less than argument (alias for <function>ceil</function>)</entry>
<entry>nearest integer greater than or equal to argument (same as <function>ceil</function>)</entry>
<entry><literal>ceiling(-95.3)</literal></entry>
<entry><literal>-95</literal></entry>
</row>
@ -725,7 +725,7 @@
<literal><function>floor(<type>dp</type> or <type>numeric</type>)</function></literal>
</entry>
<entry>(same as input)</entry>
<entry>largest integer not greater than argument</entry>
<entry>nearest integer less than or equal to argument</entry>
<entry><literal>floor(-42.8)</literal></entry>
<entry><literal>-43</literal></entry>
</row>