Code coverage fixes

lib/Db/PDODriver.php

@@ -28,9 +28,9 @@ trait PDODriver {
         }
         $changes = $r->rowCount();
         try {
+            $lastId = 0;
             $lastId = ($changes) ? $this->db->lastInsertId() : 0;
         } catch (\PDOException $e) { // @codeCoverageIgnore
-            $lastId = 0;
         }
         return new PDOResult($r, [$changes, $lastId]);
     }

lib/Db/PDOStatement.php

@@ -42,9 +42,9 @@ class PDOStatement extends AbstractStatement {
         }
         $changes = $this->st->rowCount();
         try {
+            $lastId = 0;
             $lastId = ($changes) ? $this->db->lastInsertId() : 0;
         } catch (\PDOException $e) { // @codeCoverageIgnore
-            $lastId = 0;
         }
         return new PDOResult($this->st, [$changes, $lastId]);
     }

lib/Db/PostgreSQL/PDOStatement.php

@@ -42,12 +42,13 @@ class PDOStatement extends \JKingWeb\Arsse\Db\AbstractStatement {
             parent::retypeArray($bindings, $append);
             $this->qMunged = self::mungeQuery($this->qOriginal, $this->types, false);
             try {
+                // statement creation with PostgreSQL should never fail (it is not evaluated at creation time)
                 $s = $this->db->prepare($this->qMunged);
-                $this->st = new \JKingWeb\Arsse\Db\PDOStatement($this->db, $s, $this->bindings);
-            } catch (\PDOException $e) {
-                list($excClass, $excMsg, $excData) = $this->exceptionBuild(true);
-                throw new $excClass($excMsg, $excData);
+            } catch (\PDOException $e) { // @codeCoverageIgnore
+                list($excClass, $excMsg, $excData) = $this->exceptionBuild(true); // @codeCoverageIgnore
+                throw new $excClass($excMsg, $excData); // @codeCoverageIgnore
             }
+            $this->st = new \JKingWeb\Arsse\Db\PDOStatement($this->db, $s, $this->bindings);
         }
         return true;
     }

tests/cases/Db/PostgreSQL/TestStatement.php

@@ -7,7 +7,7 @@ declare(strict_types=1);
 namespace JKingWeb\Arsse\TestCase\Db\PostgreSQL;
 
 /**
- * @covers \JKingWeb\Arsse\Db\PDOStatement<extended>
+ * @covers \JKingWeb\Arsse\Db\PostgreSQL\PDOStatement<extended>
  * @covers \JKingWeb\Arsse\Db\PDOError */
 class TestStatement extends \JKingWeb\Arsse\TestCase\Db\BaseStatement {
     protected static $implementation = "PDO PostgreSQL";