sesam_query
(PHP 3 CVS only)
sesam_query -- Perform a SESAM SQL query and prepare the result
Description
string
sesam_query ( string query [, bool scrollable])
Returns: A SESAM "result identifier" on success, or
FALSE on error.
A "result_id" resource is used by other functions to retrieve the
query results.
sesam_query() sends a query to the currently
active database on the server. It can execute both "immediate"
SQL statements and "select type" queries. If an "immediate"
statement is executed, then no cursor is allocated, and any
subsequent sesam_fetch_row() or
sesam_fetch_result() call will return an empty
result (zero columns, indicating end-of-result). For "select
type" statements, a result descriptor and a (scrollable or
sequential, depending on the optional boolean
scrollable parameter) cursor will be
allocated. If scrollable is omitted, the
cursor will be sequential.
When using "scrollable" cursors, the cursor can be freely
positioned on the result set. For each "scrollable" query, there
are global default values for the scrolling type (initialized to:
SESAM_SEEK_NEXT) and the scrolling offset
which can either be set once by
sesam_seek_row() or each time when fetching a
row using sesam_fetch_row().
For "immediate" statements, the number of affected rows is saved
for retrieval by the sesam_affected_rows()
function.
See also: sesam_fetch_row() and
sesam_fetch_result().
例子 1.
Show all rows of the "phone" table as a HTML table
<?php
if (!sesam_connect("phonedb", "demo", "otto"))
die("cannot connect");
$result = sesam_query("select * from phone");
if (!$result) {
$err = sesam_diagnostic();
die $err["errmsg"]);
}
echo "<table border>\n";
// Add title header with column names above the result:
if ($cols = sesam_field_array($result)) {
echo "<tr><th colspan=" . $cols["count"] . ">Result:</th></tr>\n";
echo "<tr>\n";
for ($col = 0; $col < $cols["count"]; ++$col) {
$colattr = $cols[$col];
/* Span the table head over SESAM's "Multiple Fields": */
if ($colattr["count"] > 1) {
echo "<th colspan=\"" . $colattr["count"] . "\">" . $colattr["name"] .
"(1.." . $colattr["count"] . ")</th>\n";
$col += $colattr["count"] - 1;
} else
echo "<th>" . $colattr["name"] . "</th>\n";
}
echo "</tr>\n";
}
do {
// Fetch the result in chunks of 100 rows max.
$ok = sesam_fetch_result($result, 100);
for ($row=0; $row < $ok["rows"]; ++$row) {
echo " <tr>\n";
for ($col = 0; $col < $ok["cols"]; ++$col) {
if (isset($ok[$col][$row])) {
echo "<td>" . $ok[$col][$row] . "</td>\n";
} else {
echo "<td>-empty-</td>\n";
}
}
echo "</tr>\n";
}
} while ($ok["truncated"]); // while there may be more data
echo "</table>\n";
// free result id
sesam_free_result($result);
?>
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