Use StringColumn for decimal type by default

CHANGELOG.md

@@ -9,7 +9,7 @@
 - Chg #339: Replace call of `SchemaInterface::getRawTableName()` to `QuoterInterface::getRawTableName()` (@Tigrov)
 - New #342, #430: Add JSON overlaps condition builder (@Tigrov)
 - Enh #344: Update `bit` type according to main PR yiisoft/db#860 (@Tigrov)
-- New #346, #361: Implement `ColumnFactory` class (@Tigrov)
+- New #346, #361, #454: Implement `ColumnFactory` class (@Tigrov, @vjik)
 - Enh #347, #353: Raise minimum PHP version to `^8.1` with minor refactoring (@Tigrov)
 - Bug #349, #352: Restore connection if closed by connection timeout (@Tigrov)
 - Enh #354: Separate column type constants (@Tigrov)

src/Column/ColumnFactory.php

@@ -75,6 +75,7 @@ protected function getColumnClass(string $type, array $info = []): string
             ColumnType::TIME => DateTimeColumn::class,
             ColumnType::TIMETZ => DateTimeColumn::class,
             ColumnType::DATE => DateTimeColumn::class,
+            ColumnType::DECIMAL => StringColumn::class,
             default => parent::getColumnClass($type, $info),
         };
     }

tests/ColumnTest.php

@@ -50,7 +50,7 @@ public function testSelectWithPhpTypecasting(): void
         $expected = [
             'null' => null,
             1 => 1,
-            '2.5' => 2.5,
+            '2.5' => '2.5',
             'true' => 1,
             'false' => 0,
             'string' => 'string',
@@ -78,13 +78,13 @@ public function testSelectWithPhpTypecasting(): void
             ->withPhpTypecasting()
             ->queryScalar();
 
-        $this->assertSame(2.5, $result);
+        $this->assertSame('2.5', $result);
 
         $result = $db->createCommand('SELECT 2.5 UNION SELECT 3.3')
             ->withPhpTypecasting()
             ->queryColumn();
 
-        $this->assertSame([2.5, 3.3], $result);
+        $this->assertSame(['2.5', '3.3'], $result);
 
         $db->close();
     }

tests/Provider/ColumnFactoryProvider.php

@@ -32,8 +32,8 @@ public static function dbTypes(): array
             ['float', ColumnType::FLOAT, DoubleColumn::class],
             ['real', ColumnType::FLOAT, DoubleColumn::class],
             ['double', ColumnType::DOUBLE, DoubleColumn::class],
-            ['decimal', ColumnType::DECIMAL, DoubleColumn::class],
-            ['numeric', ColumnType::DECIMAL, DoubleColumn::class],
+            ['decimal', ColumnType::DECIMAL, StringColumn::class],
+            ['numeric', ColumnType::DECIMAL, StringColumn::class],
             ['char', ColumnType::CHAR, StringColumn::class],
             ['varchar', ColumnType::STRING, StringColumn::class],
             ['string', ColumnType::STRING, StringColumn::class],
@@ -63,7 +63,7 @@ public static function definitions(): array
         $definitions['text NOT NULL'][1] = new StringColumn(ColumnType::TEXT, dbType: 'text', notNull: true);
         $definitions['char(1)'][1] = new StringColumn(ColumnType::CHAR, dbType: 'char', size: 1);
         $definitions['string(126)[][]'][1] = new ArrayColumn(size: 126, dimension: 2, column: new StringColumn(size: 126));
-
+        $definitions['decimal(10,2)'][1] = new StringColumn(ColumnType::DECIMAL, dbType: 'decimal', scale: 2, size: 10);
         $definitions[] = ['bit(1)', new BooleanColumn(dbType: 'bit', size: 1)];
 
         return $definitions;

tests/Provider/QueryBuilderProvider.php

@@ -178,9 +178,9 @@ public static function upsertReturning(): array
                 true,
                 ['id_1', 'id_2'],
                 'INSERT INTO `notauto_pk` (`id_1`, `id_2`, `type`) SELECT `id_1`, `id_2`, `type`'
-                . ' FROM (SELECT 1 AS `id_1`, 2.5 AS `id_2`, :qp0 AS `type`) AS EXCLUDED'
+                . ' FROM (SELECT 1 AS `id_1`, :qp0 AS `id_2`, :qp1 AS `type`) AS EXCLUDED'
                 . ' ON DUPLICATE KEY UPDATE `type`=EXCLUDED.`type`;SELECT 1 AS `id_1`, 2.5 AS `id_2`',
-                [':qp0' => new Param('Test', DataType::STRING)],
+                [':qp0' => new Param('2.5', DataType::STRING), ':qp1' => new Param('Test', DataType::STRING)],
             ],
             'no return columns' => [
                 'type',

tests/Provider/SchemaProvider.php

@@ -102,12 +102,12 @@ public static function columns(): array
                     'blob_col' => new BinaryColumn(
                         dbType: 'blob',
                     ),
-                    'numeric_col' => new DoubleColumn(
+                    'numeric_col' => new StringColumn(
                         ColumnType::DECIMAL,
                         dbType: 'decimal',
-                        size: 5,
                         scale: 2,
-                        defaultValue: 33.22,
+                        size: 5,
+                        defaultValue: '33.22',
                     ),
                     'timestamp_col' => new DateTimeColumn(
                         ColumnType::TIMESTAMP,
@@ -358,7 +358,7 @@ public static function resultColumns(): array
                 'len' => 4,
                 'precision' => 3,
             ]],
-            [new DoubleColumn(ColumnType::DECIMAL, dbType: 'decimal', name: 'numeric_col', notNull: false, size: 5, scale: 2), [
+            [new StringColumn(ColumnType::DECIMAL, dbType: 'decimal', name: 'numeric_col', notNull: false, scale: 2, size: 5), [
                 'native_type' => 'NEWDECIMAL',
                 'pdo_type' => 2,
                 'flags' => [],
@@ -412,7 +412,7 @@ public static function resultColumns(): array
                 'len' => 1,
                 'precision' => 0,
             ]],
-            [new DoubleColumn(ColumnType::DECIMAL, dbType: 'decimal', name: '2.5', notNull: true, size: 2, scale: 1), [
+            [new StringColumn(ColumnType::DECIMAL, dbType: 'decimal', name: '2.5', notNull: true, scale: 1, size: 2), [
                 'native_type' => 'NEWDECIMAL',
                 'pdo_type' => 2,
                 'flags' => ['not_null'],