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Clean up wrong, misleading, or obsolete documentation about array types,

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particularly in the CREATE TYPE reference page.  Fix some other errors
in the CREATE TYPE page, too.
This commit is contained in:
Tom Lane
2001-11-03 21:42:47 +00:00
parent f008976bcd
commit 3d5ddc0b3c
4 changed files with 140 additions and 90 deletions
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11
doc/src/sgml/array.sgml
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@@ -1,4 +1,4 @@
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/array.sgml,v 1.12 2001/09/09 17:21:44 petere Exp $ -->
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/array.sgml,v 1.13 2001/11/03 21:42:47 tgl Exp $ -->
<chapter id="arrays">
<title>Arrays</title>
@@ -23,15 +23,15 @@ CREATE TABLE sal_emp (
<structname>sal_emp</structname> with a <type>text</type> string
(<structfield>name</structfield>), a one-dimensional array of type
<type>integer</type> (<structfield>pay_by_quarter</structfield>),
which shall represent the employee's salary by quarter, and a
which represents the employee's salary by quarter, and a
two-dimensional array of <type>text</type>
(<structfield>schedule</structfield>), which represents the
employee's weekly schedule.
</para>
<para>
Now we do some <command>INSERT</command>s; note that when appending
to an array, we enclose the values within braces and separate them
Now we do some <command>INSERT</command>s. Observe that to write an array
value, we enclose the element values within braces and separate them
by commas. If you know C, this is not unlike the syntax for
initializing structures.
@@ -200,8 +200,7 @@ SELECT * FROM sal_emp WHERE pay_by_quarter[1] = 10000 OR
However, this quickly becomes tedious for large arrays, and is not
helpful if the size of the array is unknown. Although it is not part
of the primary <productname>PostgreSQL</productname> distribution,
in the contributions directory, there is an extension to
<productname>PostgreSQL</productname> that defines new functions and
there is an extension available that defines new functions and
operators for iterating over array values. Using this, the above
query could be: