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Modifications to fix db update problems

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This commit is contained in:
jacob 2010-06-08 20:31:52 +00:00
parent ee2e03df4b
commit a2239d84da
1 changed files with 107 additions and 19 deletions
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126
db/db.update.173.php
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@ -1,14 +1,12 @@
<?php
function db_update_173_pre(){
}
/****
This script takes all Latin1 character encoding in the database and converts it to UTF-8
****/
define("_DO_UPDATE", true);
function db_update_173_post(){
mysql_query("SET NAMES latin1");
// patch the committees_link table
mysql_query("ALTER TABLE `committees_link` ADD `id` INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY");
// loop through every table in the database
$data = mysql_query("SHOW TABLES");
@ -18,6 +16,7 @@ function db_update_173_post(){
while($tableInfo = mysql_fetch_array($data)){
$tableName = $tableInfo[0];
$allTables[] = $tableName;
$fieldTypes[$tableName] = array();
// loop through every field in the table
$query = mysql_query("DESCRIBE " . $tableName);
@ -25,12 +24,13 @@ function db_update_173_post(){
while($rowInfo = mysql_fetch_array($query)){
// find out if this field is a varchar, char, text, or tinytext field
if(preg_match('/.*char.*|.*text.*/', $rowInfo['Type'])){
if(preg_match('/.*char.*|.*text.*|.*enum.*/i', $rowInfo['Type'])){
// it does, so this field needs to be converted
if(!array_key_exists($tableName, $fields)){
$fields[$tableName] = array();
}
$fields[$tableName][] = $rowInfo['Field'];
$fieldTypes[$tableName][$rowInfo['Field']] = $rowInfo['Type'];
}
if($rowInfo['Key'] == 'PRI'){
$keys[$tableName][] = $rowInfo['Field'];
@ -38,6 +38,7 @@ function db_update_173_post(){
}
}
/* The array "fields" now contains the names of all fields in the database that
need to be converted (and only those that need to be converted), stored in this format:
@ -59,9 +60,18 @@ function db_update_173_post(){
Now we need to run through those tables one at a time and convert them
*/
$errorTally = 0;
echo "Updating records:\n";
$totalFailCount = 0;
foreach($fields as $tableName => $fieldSet){
// if this table does not have a primary key to reference by, we'll add one
$tempKey = false;
if(count($keys[$tableName]) == 0){
echo "table `$tableName` has no primary key. We'll create one for this update and drop it afterwards.\n";
mysql_query("ALTER TABLE `$tableName` ADD `__TEMP__id__` INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY");
$keys[$tableName][] = '__TEMP__id__';
$tempKey = true;
}
// build the query that gives us the field values we need to update in this table, as well as the primary keys
$query = "SELECT `" . implode('`, `', $fieldSet) . '`';
for($n = 0; $n < count($keys[$tableName]); $n++){
@ -75,8 +85,28 @@ function db_update_173_post(){
while($record = mysql_fetch_array($data)){
$updates[] = $record;
}
// mysql_query("SET NAMES utf8");
echo "Changing default character set on table \"$tableName\": ";
// now we have the data - let's convert the table
if(_DO_UPDATE){
$query = "ALTER TABLE `$tableName` DEFAULT CHARACTER SET 'utf8'";
$success = mysql_query($query);
if($success){
echo " success\n";
}else{
echo " Failed using query: $query\n";
$totalFailCount ++;
}
}else{
//echo "ALTER TABLE `$tableName` DEFAULT CHARACTER SET 'utf8';\n";
echo " success\n";
}
echo "\n" . 'Modifying fields: "' . implode('", "', $fieldSet) . '" in table: "' . $tableName . '"';
// now re-insert those values into the table
$failCount = 0;
foreach($updates as $update){
$query = "UPDATE $tableName SET";
$useComma = false;
@ -88,25 +118,83 @@ function db_update_173_post(){
$useComma = true;
}
$newValue = mb_convert_encoding($fieldValue, "UTF-8", "iso-8859-1");
$query .= sprintf(" `%s` = '%s'", $fieldName, mysql_real_escape_string($newValue));
$query .= " `" . $fieldName . "` = '" . mysql_real_escape_string($newValue) . "'";
//$query .= sprintf(" `%s` = '%s'", $fieldName, mysql_real_escape_string($newValue));
}
$query .= " WHERE ";
for($n = 0; $n < count($keys[$tableName]); $n++){
if($n > 0) $query .= " AND ";
$query .= "`" . $keys[$tableName][$n] . "` = '" . mysql_real_escape_string($update["__KEYFIELD_" . ($n + 1) . "__"]) . "'";
}
$success = mysql_query($query);
if($success) echo '.';
else{
echo "\nFailed to execute query: $query\n";
$errorTally ++;
if(_DO_UPDATE){
$success = mysql_query($query);
if($success){
echo '.';
}else{
echo "\nFailed to execute query: $query\n";
$failCount++;
}
}else{
echo ".";
}
}
echo "\n";
if($failCount > 0){
echo "Updating records in table $tableName failed on $failcount records.\n";
}
$totalFailCount += $failCount;
unset($updates);
// if we've created a temporary key for this table we'll remove it now
if($tempKey == true){
echo "Removing the temporary key that we used for this table\n";
$query = "ALTER TABLE `$tableName` DROP `__TEMP__id__`";
mysql_query($query);
}
// we also need to change the character encoding for the individual fields
echo "Changing character encoding for individual fields in table \"$tableName\"";
foreach($fieldTypes[$tableName] as $fieldName => $fieldType){
$query = "ALTER TABLE `$tableName` CHANGE `$fieldName` `$fieldName` ";
$query .= $fieldType;
$query .= " CHARACTER SET utf8 COLLATE utf8_general_ci";
if(_DO_UPDATE){
$success = mysql_query($query);
if($success){
echo ".";
}else{
echo "\nFailed using query: $query\n";
$totalFailCount ++;
}
}else{
echo ".";
}
}
unset($updates);
}
echo "\nComplete with $errorTally failed queries.\n";
// now drop the id column that we added to the committees_link table
$query = "ALTER TABLE `committees_link` DROP `id`";
mysql_query($query);
}
// with all of the affected tables updated, let's go ahead and update the unaffected ones
foreach($allTables as $tableName){
if(!array_key_exists($tableName, $fields)){
echo "Changing default character set on table \"$tableName\": ";
if(_DO_UPDATE){
$query = "ALTER TABLE `$tableName` DEFAULT CHARACTER SET 'utf8'";
$success = mysql_query($query);
if($success){
echo " success\n";
}else{
echo " Failed using query: $query\n";
$totalFailCount++;
}
}else{
echo " success\n";
}
}
}
echo "\nFinished updating values with $totalFailCount failed queries.\n";
}
function db_update_173_pre(){
}