archived-doc-zh/reference/pgsql/functions/pg-copy-from.xml

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<refentry xml:id="function.pg-copy-from" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>pg_copy_from</refname>
  <refpurpose>
   将数组中的记录插入到表
  </refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>pg_copy_from</methodname>
   <methodparam><type>PgSql\Connection</type><parameter>connection</parameter></methodparam>
   <methodparam><type>string</type><parameter>table_name</parameter></methodparam>
   <methodparam><type class="union"><type>array</type><type>Traversable</type></type><parameter>rows</parameter></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>separator</parameter><initializer>"\t"</initializer></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>null_as</parameter><initializer>"\\\\N"</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>pg_copy_from</function> 将 <parameter>rows</parameter> 插入记录到表中。在内部发出
   <literal>COPY FROM</literal> 命令以插入记录。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>connection</parameter></term>
     <listitem>
      &pgsql.parameter.connection;
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>table_name</parameter></term>
     <listitem>
      <para>
       复制 <parameter>rows</parameter> 到其中的表名。
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>rows</parameter></term>
     <listitem>
      <para>
       要复制 <type>iterable</type> 中的数据到 <parameter>table_name</parameter>。<parameter>rows</parameter>
       中的每个值都成为 <parameter>table_name</parameter> 中的一行。<parameter>rows</parameter>
       中的每个值都应该用字符串分割以插入到每个字段。值应该换行终止。
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>separator</parameter></term>
     <listitem>
      <para>
       <parameter>rows</parameter> 的每个元素分割为每个字段的值的标记。默认为 <literal>\t</literal>。
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>null_as</parameter></term>
     <listitem>
      <para>
       SQL <literal>NULL</literal> 值在 <parameter>rows</parameter> 中的表示方式。默认为 <literal>\\N</literal>（<literal>"\\\\N"</literal>）。
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
   <para>
    &return.success;
   </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>8.5.0</entry>
      <entry>
       <parameter>rows</parameter> 现在是 <type>iterable</type> 类型。
       之前是 <type>array</type> 类型。
      </entry>
     </row>
     &pgsql.changelog.connection-object;
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>pg_copy_from</function> 示例</title>
    <programlisting role="php">
<![CDATA[
<?php
   $db = pg_connect("dbname=publisher") or die("Could not connect");
   
   $rows = pg_copy_to($db, $table_name);
   
   pg_query($db, "DELETE FROM $table_name");
   
   pg_copy_from($db, $table_name, $rows);
?>
]]>
    </programlisting>
   </example> 
  </para>
 </refsect1>
  
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>pg_copy_to</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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