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SGML improvements.

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Neil Conway
This commit is contained in:
Bruce Momjian
2002-11-15 03:11:18 +00:00
parent 8bc717cb88
commit da8149032a
29 changed files with 405 additions and 364 deletions
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24
doc/src/sgml/syntax.sgml
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@@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/syntax.sgml,v 1.73 2002/11/11 20:14:04 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/syntax.sgml,v 1.74 2002/11/15 03:11:17 momjian Exp $
-->
<chapter id="sql-syntax">
@@ -120,8 +120,8 @@ INSERT INTO MY_TABLE VALUES (3, 'hi there');
The system uses no more than <symbol>NAMEDATALEN</symbol>-1
characters of an identifier; longer names can be written in
commands, but they will be truncated. By default,
<symbol>NAMEDATALEN</symbol> is 64 so the maximum identifier length
is 63 (but at the time PostgreSQL is built,
<symbol>NAMEDATALEN</symbol> is 64 so the maximum identifier
length is 63 (but at the time <productname>PostgreSQL</> is built,
<symbol>NAMEDATALEN</symbol> can be changed in
<filename>src/include/postgres_ext.h</filename>).
</para>
@@ -652,15 +652,15 @@ CAST ( '<replaceable>string</replaceable>' AS <replaceable>type</replaceable> )
<para>
<xref linkend="sql-precedence-table"> shows the precedence and
associativity of the operators in PostgreSQL. Most operators have
the same precedence and are left-associative. The precedence and
associativity of the operators is hard-wired into the parser.
This may lead to non-intuitive behavior; for example the Boolean
operators <literal>&lt;</> and <literal>&gt;</> have a different
precedence than the Boolean operators <literal>&lt;=</> and
<literal>&gt;=</>. Also, you will sometimes need to add
parentheses when using combinations of binary and unary operators.
For instance
associativity of the operators in <productname>PostgreSQL</>.
Most operators have the same precedence and are left-associative.
The precedence and associativity of the operators is hard-wired
into the parser. This may lead to non-intuitive behavior; for
example the Boolean operators <literal>&lt;</> and
<literal>&gt;</> have a different precedence than the Boolean
operators <literal>&lt;=</> and <literal>&gt;=</>. Also, you will
sometimes need to add parentheses when using combinations of
binary and unary operators. For instance
<programlisting>
SELECT 5 ! - 6;
</programlisting>