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Really support export of UPDATE queries (bug #914237), condition generation used from previous implementation in display_tbl.lib.php and moved to common.lib.php.

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This commit is contained in:
Michal Čihař
2004-04-14 12:55:00 +00:00
parent 7ddd5e4352
commit f6a7525818
4 changed files with 114 additions and 110 deletions
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94
libraries/common.lib.php
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@@ -557,10 +557,10 @@ if ($is_minimum_common == FALSE) {
* Get the complete list of Databases a user can access
*
* @param boolean whether to include check on failed 'only_db' operations
* @param ressource database handle (superuser)
* @param resource database handle (superuser)
* @param integer amount of databases inside the 'only_db' container
* @param ressource possible ressource from a failed previous query
* @param ressource database handle (user)
* @param resource possible resource from a failed previous query
* @param resource database handle (user)
* @param array configuration
* @param array previous list of databases
*
@@ -1896,6 +1896,7 @@ if (typeof(document.getElementById) != 'undefined'
*
* @access public
* @author Michal Cihar (nijel@users.sourceforge.net)
* @return bool Whether extension is valid
*/
function PMA_checkFileExtensions($file, $extension) {
if (substr($file, -1 * strlen($extension)) == $extension) {
@@ -1914,5 +1915,92 @@ if (typeof(document.getElementById) != 'undefined'
return FALSE;
} // end function
/**
* Function to generate unique condition for specified row.
*
* @param resource handle for current query
* @param integer number of fields
* @param array meta information about fields
* @param array current row
*
* @access public
* @author Michal Cihar (michal@cihar.com)
* @return string calculated condition
*/
function PMA_getUvaCondition($handle, $fields_cnt, $fields_meta, $row) {
$primary_key = '';
$unique_key = '';
$uva_nonprimary_condition = '';
for ($i = 0; $i < $fields_cnt; ++$i) {
$field_flags = PMA_DBI_field_flags($handle, $i);
$meta = $fields_meta[$i];
// do not use an alias in a condition
$column_for_condition = $meta->name;
if (isset($analyzed_sql[0]['select_expr']) && is_array($analyzed_sql[0]['select_expr'])) {
foreach($analyzed_sql[0]['select_expr'] AS $select_expr_position => $select_expr) {
$alias = $analyzed_sql[0]['select_expr'][$select_expr_position]['alias'];
if (!empty($alias)) {
$true_column = $analyzed_sql[0]['select_expr'][$select_expr_position]['column'];
if ($alias == $meta->name) {
$column_for_condition = $true_column;
} // end if
} // end if
} // end while
}
// to fix the bug where float fields (primary or not)
// can't be matched because of the imprecision of
// floating comparison, use CONCAT
// (also, the syntax "CONCAT(field) IS NULL"
// that we need on the next "if" will work)
if ($meta->type == 'real') {
$condition = ' CONCAT(' . PMA_backquote($column_for_condition) . ') ';
} else {
// string and blob fields have to be converted using
// the system character set (always utf8) since
// mysql4.1 can use different charset for fields.
if (PMA_MYSQL_INT_VERSION >= 40100 && ($meta->type == 'string' || $meta->type == 'blob')) {
$condition = ' CONVERT(' . PMA_backquote($column_for_condition) . ' USING utf8) ';
} else {
$condition = ' ' . PMA_backquote($column_for_condition) . ' ';
}
} // end if... else...
if (!isset($row[$i]) || is_null($row[$i])) {
$condition .= 'IS NULL AND';
} else {
if ($meta->type == 'blob'
// hexify only if this is a true not empty BLOB
&& stristr($field_flags, 'BINARY')
&& !empty($row[$i])) {
$condition .= 'LIKE 0x' . bin2hex($row[$i]). ' AND';
} else {
$condition .= '= \'' . PMA_sqlAddslashes($row[$i], FALSE, TRUE) . '\' AND';
}
}
if ($meta->primary_key > 0) {
$primary_key .= $condition;
} else if ($meta->unique_key > 0) {
$unique_key .= $condition;
}
$uva_nonprimary_condition .= $condition;
} // end for
// Correction uva 19991216: prefer primary or unique keys
// for condition, but use conjunction of all values if no
// primary key
if ($primary_key) {
$uva_condition = $primary_key;
} else if ($unique_key) {
$uva_condition = $unique_key;
} else {
$uva_condition = $uva_nonprimary_condition;
}
return preg_replace('|\s?AND$|', '', $uva_condition);
} // end function
} // end if: minimal common.lib needed?
?>