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sesam_diagnostic

(PHP 3 CVS only)

sesam_diagnostic --  Return status information for last SESAM call

Description

array sesam_diagnostic ( void )

Returns an associative array of status and return codes for the last SQL query/statement/command. Elements of the array are:

Table 1. Status information returned by sesam_diagnostic()

ElementContents
$array["sqlstate"] 5 digit SQL return code (see the SESAM manual for the description of the possible values of SQLSTATE)
$array["rowcount"] number of affected rows in last update/insert/delete (set after "immediate" statements only)
$array["errmsg"] "human readable" error message string (set after errors only)
$array["errcol"] error column number of previous error (0-based; or -1 if undefined. Set after errors only)
$array["errlin"] error line number of previous error (0-based; or -1 if undefined. Set after errors only)

In the following example, a syntax error (E SEW42AE ILLEGAL CHARACTER) is displayed by including the offending SQL statement and pointing to the error location:

Example 1. Displaying SESAM error messages with error position

<?php
// Function which prints a formatted error message,
// displaying a pointer to the syntax error in the
// SQL statement
function PrintReturncode ($exec_str) {
    $err = Sesam_Diagnostic();
    $colspan=4; // 4 cols for: sqlstate, errlin, errcol, rowcount
    if ($err["errlin"] == -1)
        --$colspan;
    if ($err["errcol"] == -1)
        --$colspan;
    if ($err["rowcount"] == 0)
        --$colspan;
    echo "<TABLE BORDER>\n";
    echo "<TR><TH COLSPAN=".$colspan."><FONT COLOR=red>ERROR:</FONT> ".
	  	htmlspecialchars($err["errmsg"])."</TH></TR>\n";
    if ($err["errcol"] >= 0) {
        echo "<TR><TD COLSPAN=".$colspan."><PRE>\n";
        $errstmt = $exec_str."\n";
        for ($lin=0; $errstmt != ""; ++$lin) {
            if ($lin != $err["errlin"]) { // $lin is less or greater than errlin
                if (!($i = strchr ($errstmt, "\n")))
                    $i = "";
                $line = substr ($errstmt, 0, strlen($errstmt)-strlen($i)+1);
                $errstmt = substr($i, 1);
                if ($line != "\n")
                    print htmlspecialchars ($line);
            } else {
                if (! ($i = strchr ($errstmt, "\n")))
                    $i = "";
                $line = substr ($errstmt, 0, strlen ($errstmt)-strlen($i)+1);
                $errstmt = substr($i, 1);
                for ($col=0; $col < $err["errcol"]; ++$col)
                    echo (substr($line, $col, 1) == "\t") ? "\t" : ".";
                echo "<FONT COLOR=RED><BLINK>\\</BLINK></FONT>\n";
                print "<FONT COLOR=\"#880000\">".htmlspecialchars($line)."</FONT>";
                for ($col=0; $col < $err["errcol"]; ++$col)
                    echo (substr ($line, $col, 1) == "\t") ? "\t" : ".";
                echo "<FONT COLOR=RED><BLINK>/</BLINK></FONT>\n";
            }
        }
        echo "</PRE></TD></TR>\n";
    }
    echo "<TR>\n";
    echo " <TD>sqlstate=" . $err["sqlstate"] . "</TD>\n";
    if ($err["errlin"] != -1)
        echo " <TD>errlin=" . $err["errlin"] . "</TD>\n";
    if ($err["errcol"] != -1)
        echo " <TD>errcol=" . $err["errcol"] . "</TD>\n";
    if ($err["rowcount"] != 0)
         echo " <TD>rowcount=" . $err["rowcount"] . "</TD>\n";
    echo "</TR>\n";
    echo "</TABLE>\n";
}

if (!sesam_connect ("mycatalog", "phoneno", "otto"))
  die ("cannot connect");

$stmt = "SELECT * FROM phone\n".
        " WHERE@ LASTNAME='KRAEMER'\n".
        " ORDER BY FIRSTNAME";
if (!($result = sesam_query ($stmt)))
    PrintReturncode ($stmt);
 ?>

See also: sesam_errormsg() for simple access to the error string only

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