Fixes issue #514.

framework/yii/db/pgsql/Schema.php

@@ -76,7 +76,8 @@ class Schema extends \yii\db\Schema
 	 * Creates a query builder for the MySQL database.
 	 * @return QueryBuilder query builder instance
 	 */
-	public function createQueryBuilder() {
+	public function createQueryBuilder()
+	{
 		return new QueryBuilder($this->db);
 	}
 
@@ -85,7 +86,8 @@ class Schema extends \yii\db\Schema
 	 * @param TableSchema $table the table metadata object
 	 * @param string $name the table name
 	 */
-	protected function resolveTableNames($table, $name) {
+	protected function resolveTableNames($table, $name)
+	{
 		$parts = explode('.', str_replace('"', '', $name));
 		if (isset($parts[1])) {
 			$table->schemaName = $parts[0];
@@ -104,7 +106,8 @@ class Schema extends \yii\db\Schema
 	 * @param string $name table name
 	 * @return string the properly quoted table name
 	 */
-	public function quoteSimpleTableName($name) {
+	public function quoteSimpleTableName($name)
+	{
 		return strpos($name, '"') !== false ? $name : '"' . $name . '"';
 	}
 
@@ -113,12 +116,15 @@ class Schema extends \yii\db\Schema
 	 * @param string $name table name
 	 * @return TableSchema|null driver dependent table metadata. Null if the table does not exist.
 	 */
-	public function loadTableSchema($name) {
+	public function loadTableSchema($name)
+	{
 		$table = new TableSchema();
 		$this->resolveTableNames($table, $name);
 		if ($this->findColumns($table)) {
 			$this->findConstraints($table);
 			return $table;
+		} else {
+			return null;
 		}
 	}
 
@@ -126,7 +132,8 @@ class Schema extends \yii\db\Schema
 	 * Collects the foreign key column details for the given table.
 	 * @param TableSchema $table the table metadata
 	 */
-	protected function findConstraints($table) {
+	protected function findConstraints($table)
+	{
 
 		$tableName = $this->quoteValue($table->name);
 		$tableSchema = $this->quoteValue($table->schemaName);
@@ -175,7 +182,8 @@ SQL;
 	 * @param TableSchema $table the table metadata
 	 * @return boolean whether the table exists in the database
 	 */
-	protected function findColumns($table) {
+	protected function findColumns($table)
+	{
 		$tableName = $this->db->quoteValue($table->name);
 		$schemaName = $this->db->quoteValue($table->schemaName);
 		$sql = <<<SQL
@@ -234,11 +242,11 @@ ORDER BY
 	a.attnum;
 SQL;
 
-		try {
 		$columns = $this->db->createCommand($sql)->queryAll();
-		} catch (\Exception $e) {
+		if (empty($columns)) {
 			return false;
 		}
+
 		foreach ($columns as $column) {
 			$column = $this->loadColumnSchema($column);
 			$table->columns[$column->name] = $column;
@@ -257,7 +265,8 @@ SQL;
 	 * @param array $info column information
 	 * @return ColumnSchema the column schema object
 	 */
-	protected function loadColumnSchema($info) {
+	protected function loadColumnSchema($info)
+	{
 		$column = new ColumnSchema();
 		$column->allowNull = $info['is_nullable'];
 		$column->autoIncrement = $info['is_autoinc'];
@@ -280,5 +289,4 @@ SQL;
 		$column->phpType = $this->getColumnPhpType($column);
 		return $column;
 	}
-
 }