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* Reconstruct convertAlterTableSql.

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This commit is contained in:
tanghucheng
2023-06-20 15:29:53 +08:00
parent 21cff92e75
commit c3ac7df60c
1 changed files with 11 additions and 14 deletions
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lib/dbh/dbh.class.php
+11 -14
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@@ -459,14 +459,7 @@ class dbh
$sql = preg_replace('/\,\s*(unique|fulltext)*\s+key[\_\"0-9a-z ]+\(+[\,\_\"0-9a-z ]+\)+/i', '', $sql);
$sql = preg_replace('/ float\s*\(+[\,\_\"0-9a-z ]+\)+/i', ' float', $sql);
/* Convert "date" datetime to "date" datetime(0) to fix bug 25725, dm database datetime default 6 */
preg_match_all('/"[0-9a-zA-Z]+" datetime/', $sql, $datetimeMatch);
if(!empty($datetimeMatch))
{
foreach($datetimeMatch[0] as $match) $sql = str_replace($match, $match . '(0)', $sql);
}
$sql = $this->convertAlterTableSql($sql);
if(strpos($sql, "ALTER TABLE") !== false) $sql = $this->convertAlterTableSql($sql);
}
return $sql;
@@ -481,8 +474,15 @@ class dbh
*/
public function convertAlterTableSql($sql)
{
$pattern = '/ALTER TABLE "(.*?)" CHANGE "(.*?)" "(.*?)" (.*?)(?:;|$)/';
/* If table has datas and sql no default values defined, add default ''/0. */
if(strpos($sql, "NOT NULL") !== false && strpos($sql, "DEFAULT") === false)
{
$default = '';
if(strpos($sql, "integer") !== false) $default = 0;
$sql = str_replace("NOT NULL", "NOT NULL DEFAULT '" . $default ."'", $sql);
}
$pattern = '/ALTER TABLE "(.*?)" CHANGE "(.*?)" "(.*?)" (.*?)(?:;|$)/';
preg_match($pattern, $sql, $matches);
if(count($matches) != 5) return $sql;
@@ -490,13 +490,10 @@ class dbh
$oldColumnName = $matches[2];
$newColumnName = $matches[3];
$params = str_replace("'", "''", $matches[4]);
$tmpColumnName = $newColumnName . '_tmp';
$sql = 'begin ';
$sql .= "execute immediate 'ALTER TABLE $tableName ADD " . '"' . $tmpColumnName . '"' . " $params ';";
$sql .= "execute immediate 'UPDATE " . '"' . $tableName . '"' . ' SET "' . $tmpColumnName . '" = "' . $oldColumnName .'"' . "';";
$sql .= "execute immediate 'ALTER TABLE " . '"' . $tableName . '"' . ' DROP "' . $oldColumnName .'"' . "';";
$sql .= "execute immediate 'ALTER TABLE " . '"' . $tableName . '"' . ' ALTER "' . $tmpColumnName .'" RENAME TO "' . $newColumnName .'"' . "';";
if($oldColumnName != $newColumnName) $sql .= "execute immediate 'ALTER TABLE $tableName ALTER " . '"' . $oldColumnName . '" RENAME TO "' . $newColumnName . '"' . "';";
$sql .= "execute immediate 'ALTER TABLE $tableName MODIFY " . '"' . $newColumnName . '" ' . $params . "';";
$sql .= 'end;';
return $sql;