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<?php |
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/** |
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* Table Index. |
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* |
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* @package SeQura/WC |
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*/ |
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|
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namespace SeQura\WC\Dto; |
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|
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/** |
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* Table Index. |
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*/ |
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class Table_Index extends Dto { |
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|
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/** |
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* Unique identifier |
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* |
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* @var string |
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*/ |
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public $name; |
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|
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/** |
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* Columns to be indexed |
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* |
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* @var Table_Index_Column[] |
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*/ |
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public $columns; |
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|
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/** |
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* Constructor |
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* |
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* @param string $name The name of the index. |
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* @param Table_Index_Column[] $columns The columns to be indexed. |
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*/ |
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public function __construct( string $name, array $columns ) { |
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$this->name = $name; |
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$this->columns = $columns; |
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} |
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|
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/** |
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* Generate SQL definition for the index. |
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* |
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* @return string SQL statement to create the index. |
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*/ |
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public function to_sql() { |
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$index_name = \sanitize_key( $this->name ); |
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$columns = array(); |
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foreach ( $this->columns as $column ) { |
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$columns[] = '`' . \sanitize_key( $column->name ) . '`' . ( null !== $column->char_limit ? "({$column->char_limit})" : '' ); |
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} |
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$columns = implode( ', ', $columns ); |
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return "INDEX `{$index_name}` ({$columns})"; |
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} |
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} |
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|
