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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.8 $ -->
<!-- splitted from ./en/functions/ifx.xml, last change in rev 1.2 -->
<refentry id="function.ifx-query">
<refnamediv>
<refname>ifx_query</refname>
<refpurpose>Send Informix query</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>resource</type><methodname>ifx_query</methodname>
<methodparam><type>string</type><parameter>query</parameter></methodparam>
<methodparam><type>resource</type><parameter>link_identifier</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>cursor_type</parameter></methodparam>
<methodparam choice="opt"><type>mixed</type><parameter>
blobidarray
</parameter></methodparam>
</methodsynopsis>
<para>
Returns valid Informix result identifier on success, or
&false; on error.
</para>
<para>
A "result_id" resource used by other functions to retrieve the
query results. Sets "affected_rows" for retrieval by the
<function>ifx_affected_rows</function> function.
</para>
<para>
<function>ifx_query</function> sends a query to the currently
active database on the server that's associated with the
specified link identifier. <!-- If the link identifier isn't
specified, the last opened link is assumed. If no link is open,
the function tries to establish a link as if
<function>ifx_connect</function> was called, and use it. -->
</para>
<para>
Executes <parameter>query</parameter> on connection
<parameter>conn_id</parameter>. For "select-type" queries a
cursor is declared and opened. The optional
<parameter>cursor_type</parameter> parameter allows you to make
this a "scroll" and/or "hold" cursor. It's a bitmask and can be
either IFX_SCROLL, IFX_HOLD, or both or'ed together. Non-select
queries are "execute immediate". IFX_SCROLL and IFX_HOLD are
symbolic constants and as such shouldn't be between quotes. I you
omit this parameter the cursor is a normal sequential cursor.
</para>
<para>
For either query type the number of (estimated or real) affected
rows is saved for retrieval by
<function>ifx_affected_rows</function>.
</para>
<para>
If you have BLOB (BYTE or TEXT) columns in an update query, you
can add a <parameter>blobidarray</parameter> parameter containing
the corresponding "blob ids", and you should replace those
columns with a "?" in the query text.
</para>
<para>
If the contents of the TEXT (or BYTE) column allow it, you can
also use "ifx_textasvarchar(1)" and "ifx_byteasvarchar(1)". This
allows you to treat TEXT (or BYTE) columns just as if they were
ordinary (but long) VARCHAR columns for select queries, and you
don't need to bother with blob id's.
</para><para>
With ifx_textasvarchar(0) or ifx_byteasvarchar(0) (the default
situation), select queries will return BLOB columns as blob id's
(integer value). You can get the value of the blob as a string
or file with the blob functions (see below).
</para>
<para>
<example>
<title>
Show all rows of the "orders" table as a HTML table
</title>
<programlisting role="php">
<![CDATA[
<?php
ifx_textasvarchar(1); // use "text mode" for blobs
$res_id = ifx_query("select * from orders", $conn_id);
if (! $res_id) {
printf("Can't select orders : %s\n<br />%s<br />\n", ifx_error());
ifx_errormsg();
die;
}
ifx_htmltbl_result($res_id, "border=\"1\"");
ifx_free_result($res_id);
?>
]]>
</programlisting>
</example>
<example>
<title>Insert some values into the "catalog" table</title>
<programlisting role="php">
<![CDATA[
<?php
// create blob id's for a byte and text column
$textid = ifx_create_blob(0, 0, "Text column in memory");
$byteid = ifx_create_blob(1, 0, "Byte column in memory");
// store blob id's in a blobid array
$blobidarray[] = $textid;
$blobidarray[] = $byteid;
// launch query
$query = "insert into catalog (stock_num, manu_code, " .
"cat_descr,cat_picture) values(1,'HRO',?,?)";
$res_id = ifx_query($query, $conn_id, $blobidarray);
if (! $res_id) {
/* ... error ... */
}
// free result id
ifx_free_result($res_id);
?>
]]>
</programlisting>
</example>
</para>
<para>
See also <function>ifx_connect</function>.
</para>
</refsect1>
</refentry>
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