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| 1 | <?php |
| 2 | |
| 3 | namespace Wikimedia\Rdbms; |
| 4 | |
| 5 | use Doctrine\DBAL\Platforms\AbstractPlatform; |
| 6 | use Doctrine\DBAL\Types\Type; |
| 7 | |
| 8 | /** |
| 9 | * Custom handling for ENUM datatype |
| 10 | * |
| 11 | * NOTE: Use of this type is discouraged unless necessary. Please use |
| 12 | * alternative types where possible. See T119173 for the RFC discussion |
| 13 | * about this type and potential alternatives. |
| 14 | * |
| 15 | * @see https://phabricator.wikimedia.org/T119173 |
| 16 | */ |
| 17 | class EnumType extends Type { |
| 18 | public const ENUM = 'mwenum'; |
| 19 | |
| 20 | /** |
| 21 | * Gets the SQL declaration snippet for an ENUM column |
| 22 | * |
| 23 | * @param mixed[] $column Column definition |
| 24 | * @param AbstractPlatform $platform |
| 25 | * |
| 26 | * @return string |
| 27 | */ |
| 28 | public function getSQLDeclaration( array $column, AbstractPlatform $platform ) { |
| 29 | // SQLite does not support ENUM type |
| 30 | if ( $platform->getName() == 'sqlite' ) { |
| 31 | return 'TEXT'; |
| 32 | } |
| 33 | |
| 34 | // PostgreSQL does support but needs custom handling. |
| 35 | // This just returns a string name that references the |
| 36 | // actual ENUM which will be created by CREATE TYPE command |
| 37 | // If 'fixed' option is not passed, this field will use TEXT |
| 38 | if ( $platform->getName() == 'postgresql' ) { |
| 39 | if ( !$column['fixed'] ) { |
| 40 | return 'TEXT'; |
| 41 | } |
| 42 | |
| 43 | return strtoupper( $column['name'] . '_enum' ); |
| 44 | } |
| 45 | |
| 46 | if ( $platform->getName() == 'mysql' ) { |
| 47 | $enumValues = $this->formatValues( $column['enum_values'] ); |
| 48 | return "ENUM( $enumValues )"; |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Gets the sql portion to create ENUM for Postgres table column |
| 54 | * |
| 55 | * @param mixed[] $column |
| 56 | * @param AbstractPlatform $platform |
| 57 | * |
| 58 | * @see MWPostgreSqlPlatform::_getCreateTableSQL() |
| 59 | * @throws \InvalidArgumentException |
| 60 | * @return string |
| 61 | */ |
| 62 | public function makeEnumTypeSql( $column, $platform ) { |
| 63 | if ( $platform->getName() !== 'postgresql' ) { |
| 64 | throw new \InvalidArgumentException( |
| 65 | __METHOD__ . ' can only be called on Postgres platform' |
| 66 | ); |
| 67 | } |
| 68 | |
| 69 | $enumName = strtoupper( $column['name'] . '_enum' ); |
| 70 | $enumValues = $this->formatValues( $column['enum_values'] ); |
| 71 | $typeSql = "\n\nCREATE TYPE $enumName AS ENUM( $enumValues )"; |
| 72 | |
| 73 | return $typeSql; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Get the imploded values suitable for pushing directly into ENUM(); |
| 78 | * |
| 79 | * @param string[] $values |
| 80 | * @return string |
| 81 | */ |
| 82 | public function formatValues( $values ) { |
| 83 | $values = implode( "','", $values ); |
| 84 | $enumValues = "'" . $values . "'"; |
| 85 | |
| 86 | return $enumValues; |
| 87 | } |
| 88 | |
| 89 | public function getName() { |
| 90 | return self::ENUM; |
| 91 | } |
| 92 | } |