mirror of
https://github.com/php/doc-pt_br.git
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145 lines
3.5 KiB
XML
145 lines
3.5 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: aa2e1accf0888a290a76b9193844d0d7b7bd40b8 Maintainer: leonardolara Status: ready --><!-- CREDITS: felipe,leonardolara -->
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<chapter xml:id="pgsql.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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&reftitle.examples;
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<section xml:id="pgsql.examples-basic">
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<title>Uso básico</title>
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<para>
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Este exemplo simples mostra como conectar, executar uma consulta, mostrar
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linhas de resultados e desconectar de um banco de dados PostgreSQL.
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<example>
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<title>Exemplo geral da extensão PostgreSQL</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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// Connectando, selectionando o banco
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$dbconn = pg_connect("host=localhost dbname=publishing user=www password=foo")
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or die('Não foi possível conectar: ' . pg_last_error());
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// Executando consulta SQL
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$query = 'SELECT * FROM authors';
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$result = pg_query($dbconn, $query) or die('A consulta falhou: ' . pg_last_error());
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// Exibindo resultados em HTML
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echo "<table>\n";
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while ($line = pg_fetch_array($result, null, PGSQL_ASSOC)) {
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echo "\t<tr>\n";
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foreach ($line as $col_value) {
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echo "\t\t<td>$col_value</td>\n";
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}
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echo "\t</tr>\n";
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}
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echo "</table>\n";
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// Liberando o conjunto de resultados
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pg_free_result($result);
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// Fechando a conexão
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pg_close($dbconn);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</section>
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<section xml:id="pgsql.examples-queries">
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<title>Basic usage</title>
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<para>
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Estes exemplos contêm funções definidas pelo usuário similares às funções legadas
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do MySQL.
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<example>
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<title>Exemplo de funções definidas pelo usuário no PostgreSQL</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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// Este função deve ser necessária, já que o a conexão PostgreSQL vincula o banco de dados.
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function pg_list_dbs($db)
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{
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assert(is_resource($db));
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$query = '
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SELECT
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d.datname as "Name",
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u.usename as "Owner",
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pg_encoding_to_char(d.encoding) as "Encoding"
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FROM
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pg_database d LEFT JOIN pg_user u ON d.datdba = u.usesysid
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ORDER BY 1;
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';
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return pg_query($db, $query);
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}
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// Lista tabelas.
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function pg_list_tables($db)
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{
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assert(is_resource($db));
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$query = "
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SELECT
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c.relname as \"Name\",
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CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' END as \"Type\",
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u.usename as \"Owner\"
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FROM
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pg_class c LEFT JOIN pg_user u ON c.relowner = u.usesysid
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WHERE
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c.relkind IN ('r','v','S','')
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AND c.relname !~ '^pg_'
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ORDER BY 1;
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";
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return pg_query($db, $query);
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}
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// Veja também pg_meta_data(). Ela retorna definições de campo em um array.
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function pg_list_fields($db, $table)
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{
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assert(is_resource($db));
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$query = "
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SELECT
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a.attname,
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format_type(a.atttypid, a.atttypmod),
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a.attnotnull,
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a.atthasdef,
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a.attnum
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FROM
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pg_class c,
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pg_attribute a
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WHERE
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c.relname = '".$table."'
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AND a.attnum > 0 AND a.attrelid = c.oid
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ORDER BY a.attnum;
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";
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return pg_query($db, $query);
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}
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</section>
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</chapter>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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