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doc: add function argument and query parameter limits

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Also reorder entries and add commas.

Reported-by: David G. Johnston

Discussion: https://postgr.es/m/CAKFQuwYeNPxeocV3_0+Zx=_Xwvg+sNyEMdzyG5s2E2e0hZLQhg@mail.gmail.com

Author: David G. Johnston (partial)

Backpatch-through: 12
This commit is contained in:
Bruce Momjian 2023-10-31 09:23:09 -04:00
parent fbaee69bdf
commit 20fe4bba88
1 changed files with 27 additions and 15 deletions
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42
doc/src/sgml/limits.sgml
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@ -57,14 +57,14 @@
<row>
<entry>columns per table</entry>
<entry>1600</entry>
<entry>1,600</entry>
<entry>further limited by tuple size fitting on a single page; see note
below</entry>
</row>
<row>
<entry>columns in a result set</entry>
<entry>1664</entry>
<entry>1,664</entry>
<entry></entry>
</row>
@ -74,12 +74,6 @@
<entry></entry>
</row>
<row>
<entry>identifier length</entry>
<entry>63 bytes</entry>
<entry>can be increased by recompiling <productname>PostgreSQL</productname></entry>
</row>
<row>
<entry>indexes per table</entry>
<entry>unlimited</entry>
@ -92,11 +86,29 @@
<entry>can be increased by recompiling <productname>PostgreSQL</productname></entry>
</row>
<row>
<entry>partition keys</entry>
<entry>32</entry>
<entry>can be increased by recompiling <productname>PostgreSQL</productname></entry>
</row>
<row>
<entry>partition keys</entry>
<entry>32</entry>
<entry>can be increased by recompiling <productname>PostgreSQL</productname></entry>
</row>
<row>
<entry>identifier length</entry>
<entry>63 bytes</entry>
<entry>can be increased by recompiling <productname>PostgreSQL</productname></entry>
</row>
<row>
<entry>function arguments</entry>
<entry>100</entry>
<entry>can be increased by recompiling <productname>PostgreSQL</productname></entry>
</row>
<row>
<entry>query parameters</entry>
<entry>65,535</entry>
<entry></entry>
</row>
</tbody>
</tgroup>
</table>
@ -104,9 +116,9 @@
<para>
The maximum number of columns for a table is further reduced as the tuple
being stored must fit in a single 8192-byte heap page. For example,
excluding the tuple header, a tuple made up of 1600 <type>int</type> columns
excluding the tuple header, a tuple made up of 1,600 <type>int</type> columns
would consume 6400 bytes and could be stored in a heap page, but a tuple of
1600 <type>bigint</type> columns would consume 12800 bytes and would
1,600 <type>bigint</type> columns would consume 12800 bytes and would
therefore not fit inside a heap page.
Variable-length fields of
types such as <type>text</type>, <type>varchar</type>, and <type>char</type>