Do not attempt to parse int2vector and oidvector

Fixes #68

Author: trowski

src/Internal/PgSqlHandle.php

@@ -175,7 +175,7 @@ public function __construct(
      */
     private static function fetchTypes(\PgSql\Connection $handle): array
     {
-        $result = \pg_query($handle, "SELECT t.oid, t.typcategory, t.typdelim, t.typelem
+        $result = \pg_query($handle, "SELECT t.oid, t.typcategory, t.typname, t.typdelim, t.typelem
              FROM pg_catalog.pg_type t JOIN pg_catalog.pg_namespace n ON t.typnamespace=n.oid
              WHERE t.typisdefined AND n.nspname IN ('pg_catalog', 'public') ORDER BY t.oid");
 
@@ -185,10 +185,18 @@ private static function fetchTypes(\PgSql\Connection $handle): array
 
         $types = [];
         while ($row = \pg_fetch_array($result, mode: \PGSQL_NUM)) {
-            [$oid, $type, $delimiter, $element] = $row;
-            \assert(\is_numeric($oid) && \is_numeric($element), "OID and element type expected to be integers");
-            \assert(\is_string($type) && \is_string($delimiter), "Unexpected types in type catalog query results");
-            $types[(int) $oid] = new PgSqlType($type, $delimiter, (int) $element);
+            [$oid, $typeCategory, $typeName, $delimiter, $element] = $row;
+
+            \assert(
+                \is_numeric($oid) && \is_numeric($element),
+                "OID and element type expected to be integers",
+            );
+            \assert(
+                \is_string($typeCategory) && \is_string($typeName) && \is_string($delimiter),
+                "Unexpected types in type catalog query results",
+            );
+
+            $types[(int) $oid] = new PgSqlType($typeCategory, $typeName, $delimiter, (int) $element);
         }
 
         return $types;

src/Internal/PgSqlResultIterator.php

@@ -81,23 +81,31 @@ private function cast(int $oid, ?string $value): array|bool|int|float|string|nul
 
         $type = $this->types[$oid] ?? PgSqlType::getDefaultType();
 
-        return match ($type->type) {
-            'A' => ArrayParser::parse( // Array
-                $value,
-                fn (string $data) => $this->cast($type->element, $data),
-                $type->delimiter,
-            ),
-            'B' => $value === 't', // Boolean
-            'N' => match ($oid) { // Numeric
-                700, 701 => (float) $value, // "float4" and "float8" to float
-                1700 => $value, // Return "numeric" as string to retain precision
-                790 => $value, // "money" includes currency symbol as string
-                default => (int) $value, // All other numeric types cast to an integer
+        return match ($type->category) {
+            'A' => match ($type->name) { // Array
+                'int2vector', 'oidvector' => $value, // Deprecated array types
+                default => ArrayParser::parse(
+                    $value,
+                    fn (string $data) => $this->cast($type->element, $data),
+                    $type->delimiter,
+                ),
             },
-            default => match ($oid) { // String
-                17 => \pg_unescape_bytea($value),
-                default => $value, // Return a string for all other types
+            'B' => match ($value) {
+                't' => true,
+                'f' => false,
+                default => throw new PostgresParseException('Unexpected value for boolean field: ' . $value),
+            }, // Boolean
+            'N' => match ($type->name) { // Numeric
+                'float4', 'float8' => (float) $value,
+                'int2', 'int4', 'oid' => (int) $value,
+                'int8' => \PHP_INT_SIZE >= 8 ? (int) $value : $value, // String on 32-bit systems
+                default => $value, // Return a string for all other numeric types
             },
+            'U' => match ($type->name) {
+                'bytea' => \pg_unescape_bytea($value),
+                default => $value,
+            },
+            default => $value, // Return a string for all other types
         };
     }
 }

src/Internal/PgSqlType.php

@@ -8,14 +8,15 @@ final class PgSqlType
     private static ?self $default = null;
 
     public function __construct(
-        public readonly string $type,
+        public readonly string $category,
+        public readonly string $name,
         public readonly string $delimiter,
         public readonly int $element,
     ) {
     }
 
     public static function getDefaultType(): self
     {
-        return self::$default ??= new self('S', ',', 0);
+        return self::$default ??= new self('S', 'text', ',', 0);
     }
 }