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doc: Fix commas and improve spacing

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This commit is contained in:
Peter Eisentraut 2015-11-16 18:59:55 -05:00
parent 34d4f49bb9
commit 75c8af902e
1 changed files with 19 additions and 19 deletions
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38
doc/src/sgml/queries.sgml
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@ -1253,8 +1253,8 @@ ROLLUP ( <replaceable>e1</>, <replaceable>e2</>, <replaceable>e3</>, ... )
GROUPING SETS (
( <replaceable>e1</>, <replaceable>e2</>, <replaceable>e3</>, ... ),
...
( <replaceable>e1</>, <replaceable>e2</> )
( <replaceable>e1</> )
( <replaceable>e1</>, <replaceable>e2</> ),
( <replaceable>e1</> ),
( )
)
</programlisting>
@ -1282,7 +1282,7 @@ GROUPING SETS (
( b, c ),
( b ),
( c ),
( ),
( )
)
</programlisting>
</para>
@ -1294,27 +1294,27 @@ GROUPING SETS (
units for the purposes of generating the individual grouping sets.
For example:
<programlisting>
CUBE ( (a,b), (c,d) )
CUBE ( (a, b), (c, d) )
</programlisting>
is equivalent to
<programlisting>
GROUPING SETS (
( a, b, c, d )
( a, b )
( c, d )
( a, b, c, d ),
( a, b ),
( c, d ),
( )
)
</programlisting>
and
<programlisting>
ROLLUP ( a, (b,c), d )
ROLLUP ( a, (b, c), d )
</programlisting>
is equivalent to
<programlisting>
GROUPING SETS (
( a, b, c, d )
( a, b, c )
( a )
( a, b, c, d ),
( a, b, c ),
( a ),
( )
)
</programlisting>
@ -1333,27 +1333,27 @@ GROUPING SETS (
clause, then the final list of grouping sets is the cross product of the
individual items. For example:
<programlisting>
GROUP BY a, CUBE(b,c), GROUPING SETS ((d), (e))
GROUP BY a, CUBE (b, c), GROUPING SETS ((d), (e))
</programlisting>
is equivalent to
<programlisting>
GROUP BY GROUPING SETS (
(a,b,c,d), (a,b,c,e),
(a,b,d), (a,b,e),
(a,c,d), (a,c,e),
(a,d), (a,e)
(a, b, c, d), (a, b, c, e),
(a, b, d), (a, b, e),
(a, c, d), (a, c, e),
(a, d), (a, e)
)
</programlisting>
</para>
<note>
<para>
The construct <literal>(a,b)</> is normally recognized in expressions as
The construct <literal>(a, b)</> is normally recognized in expressions as
a <link linkend="sql-syntax-row-constructors">row constructor</link>.
Within the <literal>GROUP BY</> clause, this does not apply at the top
levels of expressions, and <literal>(a,b)</> is parsed as a list of
levels of expressions, and <literal>(a, b)</> is parsed as a list of
expressions as described above. If for some reason you <emphasis>need</>
a row constructor in a grouping expression, use <literal>ROW(a,b)</>.
a row constructor in a grouping expression, use <literal>ROW(a, b)</>.
</para>
</note>
</sect2>