1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
<?xml version="1.0" encoding="UTF-8"?>
<refentry version="5.0-subset Scilab" xml:id="mysql_error" xml:lang="en"
xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns:ns3="http://www.w3.org/1999/xhtml"
xmlns:mml="http://www.w3.org/1998/Math/MathML"
xmlns:db="http://docbook.org/ns/docbook">
<refnamediv>
<refname>mysql_error</refname>
<refpurpose>Returns the last error message.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>err_string = mysql_error(mysql)</synopsis>
</refsynopsisdiv>
<refsection>
<title>Description</title>
<para>For the connection specified by mysql, <literal>mysql_error</literal>
returns a null-terminated string containing the error message for
the most recently invoked API function that failed.</para>
<para>If a function didn't fail, the return value of <literal>mysql_error</literal>
may be the previous error or an empty string to indicate no error.</para>
<para>A rule of thumb is that all functions that have to ask the server
for information reset <literal>mysql_error</literal> if they succeed.</para>
<para>The language of the client error messages may be changed by
recompiling the MySQL client library.</para>
<para>Currently, you can choose error messages in several different languages.</para>
</refsection>
<refsection>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term>mysql</term>
<listitem>
<para>a MySQL pointer</para>
</listitem>
</varlistentry>
<varlistentry>
<term>err_string</term>
<listitem>
<para>the error message.</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
username = 'glpk'; // Put your username
password = 'gnu'; // Put your password
database = 'glpk';
port = 3306; // use netstat -a | grep mysql to locate the mysql port
// or ps -elf | grep mysql and locate --port
myhost = 'localhost'; // localhost most of the time
sql_ptr = mysql_init();
status = mysql_real_connect(sql_ptr, myhost, username, password, database, port);
if (status) then
printf('Error message: %s, error number: %d\n', mysql_error(sql_ptr), mysql_errno(sql_ptr));
end
mysql_close(sql_ptr);
]]></programlisting>
</refsection>
<refsection>
<title>See Also</title>
<simplelist type="inline">
<member><link linkend="mysql_init">mysql_init</link></member>
<member><link linkend="mysql_real_connect">mysql_real_connect</link></member>
<member><link linkend="mysql_close">mysql_close</link></member>
<member><link linkend="mysql_errno">mysql_errno</link></member>
</simplelist>
</refsection>
<refsection>
<title>Authors</title>
<simplelist type="vert">
<member>Yann COLLETTE</member>
</simplelist>
</refsection>
</refentry>
|
