PostgreSQL - SQL error when add new tag

administrator/components/com_tags/tables/tag.php

@@ -144,6 +144,52 @@ public function check()
 			$bad_characters = array("\"", "<", ">");
 			$this->metadesc = JString::str_ireplace($bad_characters, "", $this->metadesc);
 		}
+		// Not Null sanity check
+		$date	= JFactory::getDate();
+		if (empty($this->params))
+		{
+			$this->params = '{}';
+		}
+		if (empty($this->metadesc))
+		{
+			$this->metadesc = ' ';
+		}
+		if (empty($this->metakey))
+		{
+			$this->metakey = ' ';
+		}
+		if (empty($this->metadata))
+		{
+			$this->metadata = '{}';
+		}
+		if (empty($this->urls))
+		{
+			$this->urls = '{}';
+		}
+		if (empty($this->images))
+		{
+			$this->images = '{}';
+		}
+		if (!(int) $this->checked_out_time)
+		{
+			$this->checked_out_time = $date->toSql();
+		}
+		if (!(int) $this->modified_time)
+		{
+			$this->modified_time = $date->toSql();
+		}
+		if (!(int) $this->modified_time)
+		{
+			$this->modified_time = $date->toSql();
+		}
+		if (!(int) $this->publish_up)
+		{
+			$this->publish_up = $date->toSql();
+		}
+		if (!(int) $this->publish_down)
+		{
+			$this->publish_down = $date->toSql();
+		}
 
 		return true;
 	}

libraries/joomla/database/driver/postgresql.php

@@ -393,6 +393,14 @@ public function getTableColumns($table, $typeOnly = true)
 		{
 			foreach ($fields as $field)
 			{
+				if (stristr(strtolower($field->type), "character varying"))
+				{
+					$field->Default = "";
+				}
+				if (stristr(strtolower($field->type), "text"))
+				{
+					$field->Default = "";
+				}
 				// Do some dirty translation to MySQL output.
 				// TODO: Come up with and implement a standard across databases.
 				$result[$field->column_name] = (object) array(

libraries/joomla/database/driver/sqlsrv.php

@@ -362,6 +362,10 @@ public function getTableColumns($table, $typeOnly = true)
 		{
 			foreach ($fields as $field)
 			{
+				if (stristr(strtolower($field->type), "nvarchar"))
+				{
+					$field->Default = "";
+				}
 				$result[$field->Field] = $field;
 			}
 		}