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bug #1970836 [parser] SQL parser is slow, thanks to Christian Schmidt

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This commit is contained in:
Marc Delisle
2008-07-11 13:33:31 +00:00
parent bb2c1fbb8d
commit 403b59f8f0
3 changed files with 38 additions and 60 deletions
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42
libraries/sqlparser.lib.php
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@@ -261,7 +261,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
$this_was_quote = false;
while ($count2 < $len) {
$c = PMA_substr($sql, $count2, 1);
$c = $GLOBALS['PMA_substr']($sql, $count2, 1);
$count1 = $count2;
$previous_was_space = $this_was_space;
@@ -283,7 +283,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
}
// Checks for white space
if (PMA_STR_isSpace($c)) {
if ($GLOBALS['PMA_STR_isSpace']($c)) {
$this_was_space = true;
$count2++;
continue;
@@ -294,9 +294,9 @@ if (! defined('PMA_MINIMUM_COMMON')) {
// C style /* */
// ANSI style --
if (($c == '#')
|| (($count2 + 1 < $len) && ($c == '/') && (PMA_substr($sql, $count2 + 1, 1) == '*'))
|| (($count2 + 2 == $len) && ($c == '-') && (PMA_substr($sql, $count2 + 1, 1) == '-'))
|| (($count2 + 2 < $len) && ($c == '-') && (PMA_substr($sql, $count2 + 1, 1) == '-') && ((PMA_substr($sql, $count2 + 2, 1) <= ' ')))) {
|| (($count2 + 1 < $len) && ($c == '/') && ($GLOBALS['PMA_substr']($sql, $count2 + 1, 1) == '*'))
|| (($count2 + 2 == $len) && ($c == '-') && ($GLOBALS['PMA_substr']($sql, $count2 + 1, 1) == '-'))
|| (($count2 + 2 < $len) && ($c == '-') && ($GLOBALS['PMA_substr']($sql, $count2 + 1, 1) == '-') && (($GLOBALS['PMA_substr']($sql, $count2 + 2, 1) <= ' ')))) {
$count2++;
$pos = 0;
$type = 'bad';
@@ -316,7 +316,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
break;
} // end switch
$count2 = ($pos < $count2) ? $len : $pos;
$str = PMA_substr($sql, $count1, $count2 - $count1);
$str = $GLOBALS['PMA_substr']($sql, $count1, $count2 - $count1);
PMA_SQP_arrayAdd($sql_array, 'comment_' . $type, $str, $arraysize);
continue;
} // end if
@@ -352,7 +352,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
if (($pos < $len) && PMA_STR_charIsEscaped($sql, $pos)) {
$pos ++;
continue;
} elseif (($pos + 1 < $len) && (PMA_substr($sql, $pos, 1) == $quotetype) && (PMA_substr($sql, $pos + 1, 1) == $quotetype)) {
} elseif (($pos + 1 < $len) && ($GLOBALS['PMA_substr']($sql, $pos, 1) == $quotetype) && ($GLOBALS['PMA_substr']($sql, $pos + 1, 1) == $quotetype)) {
$pos = $pos + 2;
continue;
} else {
@@ -379,7 +379,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
default:
break;
} // end switch
$data = PMA_substr($sql, $count1, $count2 - $count1);
$data = $GLOBALS['PMA_substr']($sql, $count1, $count2 - $count1);
PMA_SQP_arrayAdd($sql_array, $type, $data, $arraysize);
continue;
}
@@ -426,7 +426,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
if (PMA_STR_isSqlIdentifier($c, false)
|| $c == '@'
|| ($c == '.'
&& PMA_STR_isDigit(PMA_substr($sql, $count2 + 1, 1))
&& $GLOBALS['PMA_STR_isDigit']($GLOBALS['PMA_substr']($sql, $count2 + 1, 1))
&& ($previous_was_space || $previous_was_bracket || $previous_was_listsep))) {
/* DEBUG
@@ -444,8 +444,8 @@ if (! defined('PMA_MINIMUM_COMMON')) {
$is_identifier = $previous_was_punct;
$is_sql_variable = $c == '@' && ! $previous_was_quote;
$is_user = $c == '@' && $previous_was_quote;
$is_digit = !$is_identifier && !$is_sql_variable && PMA_STR_isDigit($c);
$is_hex_digit = $is_digit && $c == '0' && $count2 < $len && PMA_substr($sql, $count2, 1) == 'x';
$is_digit = !$is_identifier && !$is_sql_variable && $GLOBALS['PMA_STR_isDigit']($c);
$is_hex_digit = $is_digit && $c == '0' && $count2 < $len && $GLOBALS['PMA_substr']($sql, $count2, 1) == 'x';
$is_float_digit = $c == '.';
$is_float_digit_exponent = FALSE;
@@ -474,8 +474,8 @@ if (! defined('PMA_MINIMUM_COMMON')) {
unset($pos);
}
while (($count2 < $len) && PMA_STR_isSqlIdentifier(PMA_substr($sql, $count2, 1), ($is_sql_variable || $is_digit))) {
$c2 = PMA_substr($sql, $count2, 1);
while (($count2 < $len) && PMA_STR_isSqlIdentifier($GLOBALS['PMA_substr']($sql, $count2, 1), ($is_sql_variable || $is_digit))) {
$c2 = $GLOBALS['PMA_substr']($sql, $count2, 1);
if ($is_sql_variable && ($c2 == '.')) {
$count2++;
continue;
@@ -503,7 +503,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
$is_float_digit = FALSE;
}
}
if (($is_hex_digit && PMA_STR_isHexDigit($c2)) || ($is_digit && PMA_STR_isDigit($c2))) {
if (($is_hex_digit && PMA_STR_isHexDigit($c2)) || ($is_digit && $GLOBALS['PMA_STR_isDigit']($c2))) {
$count2++;
continue;
} else {
@@ -515,7 +515,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
} // end while
$l = $count2 - $count1;
$str = PMA_substr($sql, $count1, $l);
$str = $GLOBALS['PMA_substr']($sql, $count1, $l);
$type = '';
if ($is_digit || $is_float_digit || $is_hex_digit) {
@@ -541,14 +541,14 @@ if (! defined('PMA_MINIMUM_COMMON')) {
// Checks for punct
if (PMA_STR_strInStr($c, $allpunct_list)) {
while (($count2 < $len) && PMA_STR_strInStr(PMA_substr($sql, $count2, 1), $allpunct_list)) {
while (($count2 < $len) && PMA_STR_strInStr($GLOBALS['PMA_substr']($sql, $count2, 1), $allpunct_list)) {
$count2++;
}
$l = $count2 - $count1;
if ($l == 1) {
$punct_data = $c;
} else {
$punct_data = PMA_substr($sql, $count1, $l);
$punct_data = $GLOBALS['PMA_substr']($sql, $count1, $l);
}
// Special case, sometimes, althought two characters are
@@ -590,12 +590,12 @@ if (! defined('PMA_MINIMUM_COMMON')) {
if (($first == ',') || ($first == ';') || ($first == '.') || ($first == '*')) {
$count2 = $count1 + 1;
$punct_data = $first;
} elseif (($last2 == '/*') || (($last2 == '--') && ($count2 == $len || PMA_substr($sql, $count2, 1) <= ' '))) {
} elseif (($last2 == '/*') || (($last2 == '--') && ($count2 == $len || $GLOBALS['PMA_substr']($sql, $count2, 1) <= ' '))) {
$count2 -= 2;
$punct_data = PMA_substr($sql, $count1, $count2 - $count1);
$punct_data = $GLOBALS['PMA_substr']($sql, $count1, $count2 - $count1);
} elseif (($last == '-') || ($last == '+') || ($last == '!')) {
$count2--;
$punct_data = PMA_substr($sql, $count1, $count2 - $count1);
$punct_data = $GLOBALS['PMA_substr']($sql, $count1, $count2 - $count1);
/**
* @todo for negation operator, split in 2 tokens ?
* "select x&~1 from t"
@@ -618,7 +618,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
$count2++;
$debugstr = 'C1 C2 LEN: ' . $count1 . ' ' . $count2 . ' ' . $len . "\n"
. 'STR: ' . PMA_substr($sql, $count1, $count2 - $count1) . "\n";
. 'STR: ' . $GLOBALS['PMA_substr']($sql, $count1, $count2 - $count1) . "\n";
PMA_SQP_bug($debugstr, $sql);
return $sql;