Merge pull request #424 from chegong18/master

update the gist.sgml and libpg.sgml

Author: ChenHuajun

postgresql/doc/src/sgml/ecpg.sgml

@@ -13398,7 +13398,7 @@ ____________________________________________________________________________-->
 
 <!--==========================orignal english content==========================
     <para>
-	 In typical usage, the <replaceable>string</replaceable> is a host
+     In typical usage, the <replaceable>string</replaceable> is a host
      variable reference to a string containing a dynamically-constructed
      SQL statement.  The case of a literal string is not very useful;
      you might as well just write the SQL statement directly, without
@@ -18004,7 +18004,7 @@ ____________________________________________________________________________-->
       <term><literal>ECPG_INFORMIX_DIVIDE_ZERO</literal></term>
       <listitem>
        <para>
-       如果发现尝试除零，函数会返回这个值。在内部它被定义为 -1202（<productname>Informix</productname>定义）。
+        如果发现尝试除零，函数会返回这个值。在内部它被定义为 -1202（<productname>Informix</productname>定义）。
        </para>
       </listitem>
      </varlistentry>

postgresql/doc/src/sgml/fdwhandler.sgml

@@ -544,7 +544,7 @@ ____________________________________________________________________________-->
       index's metapage.  For example:
 <screen>
 test=# SELECT * FROM bt_metap('pg_cast_oid_index');
--[ RECORD 1 ]-------------+-------
+-[ RECORD 1 ]-&minus;-&minus;-&minus;-&minus;-&minus;-+-&minus;-&minus;-&minus;-
 magic                     | 340322
 version                   | 4
 root                      | 1
@@ -599,7 +599,7 @@ ____________________________________________________________________________-->
       single pages of B-tree indexes.  For example:
 <screen>
 test=# SELECT * FROM bt_page_stats('pg_cast_oid_index', 1);
--[ RECORD 1 ]-+-----
+-[ RECORD 1 ]-+-&minus;-&minus;-
 blkno         | 1
 type          | l
 live_items    | 224
@@ -1599,4 +1599,4 @@ mapp      | {65}
   </variablelist>
  </sect2>
 
-</sect1>
+</sect1>

postgresql/doc/src/sgml/func.sgml

@@ -136,119 +136,15 @@ ____________________________________________________________________________-->
 
 <!--==========================orignal english content==========================
    <para>
-    This is a template for a procedural-language handler written in C:
-<programlisting>
-#include "postgres.h"
-#include "executor/spi.h"
-#include "commands/trigger.h"
-#include "fmgr.h"
-#include "access/heapam.h"
-#include "utils/syscache.h"
-#include "catalog/pg_proc.h"
-#include "catalog/pg_type.h"
-
-PG_MODULE_MAGIC;
-
-PG_FUNCTION_INFO_V1(plsample_call_handler);
-
-Datum
-plsample_call_handler(PG_FUNCTION_ARGS)
-{
-    Datum          retval;
-
-    if (CALLED_AS_TRIGGER(fcinfo))
-    {
-        /*
-         * Called as a trigger function
-         */
-        TriggerData    *trigdata = (TriggerData *) fcinfo-&gt;context;
-
-        retval = ...
-    }
-    else
-    {
-        /*
-         * Called as a function
-         */
-
-        retval = ...
-    }
-
-    return retval;
-}
-</programlisting>
-    Only a few thousand lines of code have to be added instead of the
-    dots to complete the call handler.
-   </para>
-____________________________________________________________________________-->
-   <para>
-    这是一个用 C 编写的过程语言处理器的模板：
-<programlisting>
-#include "postgres.h"
-#include "executor/spi.h"
-#include "commands/trigger.h"
-#include "fmgr.h"
-#include "access/heapam.h"
-#include "utils/syscache.h"
-#include "catalog/pg_proc.h"
-#include "catalog/pg_type.h"
-
-PG_MODULE_MAGIC;
-
-PG_FUNCTION_INFO_V1(plsample_call_handler);
-
-Datum
-plsample_call_handler(PG_FUNCTION_ARGS)
-{
-    Datum          retval;
-
-    if (CALLED_AS_TRIGGER(fcinfo))
-    {
-        /*
-         * Called as a trigger function
-         */
-        TriggerData    *trigdata = (TriggerData *) fcinfo-&gt;context;
-
-        retval = ...
-    }
-    else
-    {
-        /*
-         * Called as a function
-         */
-
-        retval = ...
-    }
-
-    return retval;
-}
-</programlisting>
-    要完成该调用处理器，只需要加入几千行代码来替代点号即可。
-   </para>
-
-<!--==========================orignal english content==========================
-   <para>
-    After having compiled the handler function into a loadable module
-    (see <xref linkend="dfunc"/>), the following commands then
-    register the sample procedural language:
-<programlisting>
-CREATE FUNCTION plsample_call_handler() RETURNS language_handler
-    AS '<replaceable>filename</replaceable>'
-    LANGUAGE C;
-CREATE LANGUAGE plsample
-    HANDLER plsample_call_handler;
-</programlisting>
+    A template for a procedural-language handler written as a C extension is
+    provided in <literal>src/test/modules/plsample</literal>.  This is a
+    working sample demonstrating one way to create a procedural-language
+    handler, process parameters, and return a value.
    </para>
 ____________________________________________________________________________-->
    <para>
-    在将处理器函数编译成一个可载入模块（<xref linkend="dfunc"/>）后，接着用下列命令注册例子过程语言：
-<programlisting>
-CREATE FUNCTION plsample_call_handler() RETURNS language_handler
-    AS '<replaceable>filename</replaceable>'
-    LANGUAGE C;
-CREATE LANGUAGE plsample
-    HANDLER plsample_call_handler;
-</programlisting>
+    编写为C扩展的过程-语言处理程序的模板,在<literal>src/test/modules/plsample</literal>中提供。
+    这是一个工作示例，演示了一种方法,以创建过程语言处理程序、处理参数以及返回一个值。
    </para>
 
 <!--==========================orignal english content==========================