Файл: Tools/phpmyadmin/libraries/import/sql.php
Строк: 257
<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* SQL import plugin for phpMyAdmin
*
* @package PhpMyAdmin-Import
* @subpackage SQL
*/
if (! defined('PHPMYADMIN')) {
exit;
}
/**
*
*/
if (isset($plugin_list)) {
$plugin_list['sql'] = array(
'text' => __('SQL'),
'extension' => 'sql',
'options_text' => __('Options'),
);
$compats = PMA_DBI_getCompatibilities();
if (count($compats) > 0) {
$values = array();
foreach ($compats as $val) {
$values[$val] = $val;
}
$plugin_list['sql']['options'] = array(
array('type' => 'begin_group', 'name' => 'general_opts'),
array(
'type' => 'select',
'name' => 'compatibility',
'text' => __('SQL compatibility mode:'),
'values' => $values,
'doc' => array(
'manual_MySQL_Database_Administration',
'Server_SQL_mode',
),
),
array(
'type' => 'bool',
'name' => 'no_auto_value_on_zero',
'text' => __('Do not use <code>AUTO_INCREMENT</code> for zero values'),
'doc' => array(
'manual_MySQL_Database_Administration',
'Server_SQL_mode',
'sqlmode_no_auto_value_on_zero'
),
),
array('type' => 'end_group'),
);
}
/* We do not define function when plugin is just queried for information above */
return;
}
$buffer = '';
// Defaults for parser
$sql = '';
$start_pos = 0;
$i = 0;
$len= 0;
$big_value = 2147483647;
$delimiter_keyword = 'DELIMITER '; // include the space because it's mandatory
$length_of_delimiter_keyword = strlen($delimiter_keyword);
if (isset($_POST['sql_delimiter'])) {
$sql_delimiter = $_POST['sql_delimiter'];
} else {
$sql_delimiter = ';';
}
// Handle compatibility options
$sql_modes = array();
if (isset($_REQUEST['sql_compatibility']) && 'NONE' != $_REQUEST['sql_compatibility']) {
$sql_modes[] = $_REQUEST['sql_compatibility'];
}
if (isset($_REQUEST['sql_no_auto_value_on_zero'])) {
$sql_modes[] = 'NO_AUTO_VALUE_ON_ZERO';
}
if (count($sql_modes) > 0) {
PMA_DBI_try_query('SET SQL_MODE="' . implode(',', $sql_modes) . '"');
}
unset($sql_modes);
/**
* will be set in PMA_importGetNextChunk()
*
* @global boolean $GLOBALS['finished']
*/
$GLOBALS['finished'] = false;
while (!($GLOBALS['finished'] && $i >= $len) && !$error && !$timeout_passed) {
$data = PMA_importGetNextChunk();
if ($data === false) {
// subtract data we didn't handle yet and stop processing
$offset -= strlen($buffer);
break;
} elseif ($data === true) {
// Handle rest of buffer
} else {
// Append new data to buffer
$buffer .= $data;
// free memory
unset($data);
// Do not parse string when we're not at the end and don't have ; inside
if ((strpos($buffer, $sql_delimiter, $i) === false) && !$GLOBALS['finished']) {
continue;
}
}
// Current length of our buffer
$len = strlen($buffer);
// Grab some SQL queries out of it
while ($i < $len) {
$found_delimiter = false;
// Find first interesting character
$old_i = $i;
// this is about 7 times faster that looking for each sequence i
// one by one with strpos()
if (preg_match('/('|"|#|-- |/*|`|(?i)(?<![A-Z0-9_])' . $delimiter_keyword . ')/', $buffer, $matches, PREG_OFFSET_CAPTURE, $i)) {
// in $matches, index 0 contains the match for the complete
// expression but we don't use it
$first_position = $matches[1][1];
} else {
$first_position = $big_value;
}
/**
* @todo we should not look for a delimiter that might be
* inside quotes (or even double-quotes)
*/
// the cost of doing this one with preg_match() would be too high
$first_sql_delimiter = strpos($buffer, $sql_delimiter, $i);
if ($first_sql_delimiter === false) {
$first_sql_delimiter = $big_value;
} else {
$found_delimiter = true;
}
// set $i to the position of the first quote, comment.start or delimiter found
$i = min($first_position, $first_sql_delimiter);
if ($i == $big_value) {
// none of the above was found in the string
$i = $old_i;
if (!$GLOBALS['finished']) {
break;
}
// at the end there might be some whitespace...
if (trim($buffer) == '') {
$buffer = '';
$len = 0;
break;
}
// We hit end of query, go there!
$i = strlen($buffer) - 1;
}
// Grab current character
$ch = $buffer[$i];
// Quotes
if (strpos(''"`', $ch) !== false) {
$quote = $ch;
$endq = false;
while (!$endq) {
// Find next quote
$pos = strpos($buffer, $quote, $i + 1);
/*
* Behave same as MySQL and accept end of query as end of backtick.
* I know this is sick, but MySQL behaves like this:
*
* SELECT * FROM `table
*
* is treated like
*
* SELECT * FROM `table`
*/
if ($pos === false && $quote == '`' && $found_delimiter) {
$pos = $first_sql_delimiter - 1;
// No quote? Too short string
} elseif ($pos === false) {
// We hit end of string => unclosed quote, but we handle it as end of query
if ($GLOBALS['finished']) {
$endq = true;
$i = $len - 1;
}
$found_delimiter = false;
break;
}
// Was not the quote escaped?
$j = $pos - 1;
while ($buffer[$j] == '\') $j--;
// Even count means it was not escaped
$endq = (((($pos - 1) - $j) % 2) == 0);
// Skip the string
$i = $pos;
if ($first_sql_delimiter < $pos) {
$found_delimiter = false;
}
}
if (!$endq) {
break;
}
$i++;
// Aren't we at the end?
if ($GLOBALS['finished'] && $i == $len) {
$i--;
} else {
continue;
}
}
// Not enough data to decide
if ((($i == ($len - 1) && ($ch == '-' || $ch == '/'))
|| ($i == ($len - 2) && (($ch == '-' && $buffer[$i + 1] == '-')
|| ($ch == '/' && $buffer[$i + 1] == '*')))) && !$GLOBALS['finished']) {
break;
}
// Comments
if ($ch == '#'
|| ($i < ($len - 1) && $ch == '-' && $buffer[$i + 1] == '-'
&& (($i < ($len - 2) && $buffer[$i + 2] <= ' ')
|| ($i == ($len - 1) && $GLOBALS['finished'])))
|| ($i < ($len - 1) && $ch == '/' && $buffer[$i + 1] == '*')
) {
// Copy current string to SQL
if ($start_pos != $i) {
$sql .= substr($buffer, $start_pos, $i - $start_pos);
}
// Skip the rest
$start_of_comment = $i;
// do not use PHP_EOL here instead of "n", because the export
// file might have been produced on a different system
$i = strpos($buffer, $ch == '/' ? '*/' : "n", $i);
// didn't we hit end of string?
if ($i === false) {
if ($GLOBALS['finished']) {
$i = $len - 1;
} else {
break;
}
}
// Skip *
if ($ch == '/') {
$i++;
}
// Skip last char
$i++;
// We need to send the comment part in case we are defining
// a procedure or function and comments in it are valuable
$sql .= substr($buffer, $start_of_comment, $i - $start_of_comment);
// Next query part will start here
$start_pos = $i;
// Aren't we at the end?
if ($i == $len) {
$i--;
} else {
continue;
}
}
// Change delimiter, if redefined, and skip it (don't send to server!)
if (strtoupper(substr($buffer, $i, $length_of_delimiter_keyword)) == $delimiter_keyword
&& ($i + $length_of_delimiter_keyword < $len)) {
// look for EOL on the character immediately after 'DELIMITER '
// (see previous comment about PHP_EOL)
$new_line_pos = strpos($buffer, "n", $i + $length_of_delimiter_keyword);
// it might happen that there is no EOL
if (false === $new_line_pos) {
$new_line_pos = $len;
}
$sql_delimiter = substr($buffer, $i + $length_of_delimiter_keyword, $new_line_pos - $i - $length_of_delimiter_keyword);
$i = $new_line_pos + 1;
// Next query part will start here
$start_pos = $i;
continue;
}
// End of SQL
if ($found_delimiter || ($GLOBALS['finished'] && ($i == $len - 1))) {
$tmp_sql = $sql;
if ($start_pos < $len) {
$length_to_grab = $i - $start_pos;
if (! $found_delimiter) {
$length_to_grab++;
}
$tmp_sql .= substr($buffer, $start_pos, $length_to_grab);
unset($length_to_grab);
}
// Do not try to execute empty SQL
if (! preg_match('/^([s]*;)*$/', trim($tmp_sql))) {
$sql = $tmp_sql;
PMA_importRunQuery($sql, substr($buffer, 0, $i + strlen($sql_delimiter)));
$buffer = substr($buffer, $i + strlen($sql_delimiter));
// Reset parser:
$len = strlen($buffer);
$sql = '';
$i = 0;
$start_pos = 0;
// Any chance we will get a complete query?
//if ((strpos($buffer, ';') === false) && !$GLOBALS['finished']) {
if ((strpos($buffer, $sql_delimiter) === false) && !$GLOBALS['finished']) {
break;
}
} else {
$i++;
$start_pos = $i;
}
}
} // End of parser loop
} // End of import loop
// Commit any possible data in buffers
PMA_importRunQuery('', substr($buffer, 0, $len));
PMA_importRunQuery();
?>