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<?php |
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namespace mindplay\sql\model\query; |
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use mindplay\sql\model\components\Conditions; |
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use mindplay\sql\model\Driver; |
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use mindplay\sql\model\schema\Column; |
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use mindplay\sql\model\schema\Table; |
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use mindplay\sql\model\TypeProvider; |
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/** |
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* This class represents an UPDATE query. |
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*/ |
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class UpdateQuery extends Query |
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{ |
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use Conditions; |
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protected Table $table; |
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protected Driver $driver; |
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/** |
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* @var array<string,string> map where Column name => literal SQL expression to assign |
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*/ |
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private $assignments = []; |
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/** |
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* @param Table $table |
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* @param TypeProvider $types |
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*/ |
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public function __construct(Table $table, Driver $driver, TypeProvider $types) |
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{ |
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parent::__construct($types); |
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$this->table = $table; |
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$this->driver = $driver; |
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} |
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/** |
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* @param Column|string $column Column to update (or Column name) |
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* @param mixed $value value to apply |
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* |
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* @return $this |
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*/ |
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public function setValue(Column|string $column, mixed $value): static |
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{ |
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// TODO qualify table-references to support UPDATE queries with JOINs |
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if ($column instanceof Column) { |
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$name = $this->getPlaceholder($column); |
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$type = $column->getType(); |
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$quoted_name = $this->driver->quoteName($column->getName()); |
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} else { |
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$name = $column; |
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$type = null; |
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$quoted_name = $this->driver->quoteName($name); |
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} |
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$this->assignments[$name] = "{$quoted_name} = :{$name}"; |
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$this->bind($name, $value, $type); |
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return $this; |
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} |
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/** |
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* @param Column|string $column Column to update (or Column name) |
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* @param string $expr literal SQL expression |
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* |
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* @return $this |
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*/ |
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public function setExpr(Column|string $column, string $expr): static |
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{ |
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// TODO qualify table-references to support UPDATE queries with JOINs |
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if ($column instanceof Column) { |
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$name = $this->getPlaceholder($column); |
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$quoted_name = $this->driver->quoteName($column->getName()); |
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} else { |
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$name = $column; |
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$quoted_name = $this->driver->quoteName($name); |
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} |
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$this->assignments[$name] = "{$quoted_name} = {$expr}"; |
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return $this; |
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} |
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/** |
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* @param array<string,int|string|bool|null> $values map where Column name => scalar values to assign |
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* |
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* @return $this |
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*/ |
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public function assign(array $values) |
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{ |
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$columns = $this->table->listColumns(); |
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foreach ($columns as $column) { |
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$name = $column->getName(); |
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if (array_key_exists($name, $values)) { |
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$this->setValue($column, $values[$name]); |
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} |
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} |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getSQL(): string |
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{ |
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$update = "UPDATE " . $this->table->getNode(); |
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$set = "\nSET " . implode(",\n ", $this->assignments); |
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$where = count($this->conditions) |
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? "\nWHERE " . $this->buildConditions() |
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: ''; // no conditions present |
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return "{$update}{$set}{$where}"; |
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} |
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/** |
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* @param Column $column |
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* |
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* @return string |
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*/ |
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private function getPlaceholder(Column $column): string |
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{ |
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$table = $column->getTable(); |
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$table_name = $table->getAlias() ?: $table->getName(); |
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$column_name = $column->getName(); |
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$name = "{$table_name}_{$column_name}"; |
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return $name; |
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} |
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} |
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mindplay-dk /
sql
