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<?php |
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/** |
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* |
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* This file is part of Aura for PHP. |
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* |
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* @license http://opensource.org/licenses/bsd-license.php BSD |
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* |
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*/ |
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namespace Aura\SqlQuery\Common; |
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use Aura\SqlQuery\AbstractDmlQuery; |
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use Aura\SqlQuery\Exception; |
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/** |
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* An object for INSERT queries. |
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* @package Aura.SqlQuery |
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* |
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*/ |
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class Insert extends AbstractDmlQuery implements InsertInterface |
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{ |
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/** |
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* The table to insert into. |
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* |
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* @var string |
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* |
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*/ |
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protected $into; |
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/** |
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* |
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* A map of fully-qualified `table.column` names to last-insert-id names. |
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* This is used to look up the right last-insert-id name for a given table |
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* and column. Generally useful only for extended tables in Posgres. |
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* |
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* @var array |
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* |
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*/ |
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protected $last_insert_id_names; |
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/** |
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* |
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* The current row-number we are adding column values for. This comes into |
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* play only with bulk inserts. |
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* |
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* @var int |
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* |
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*/ |
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protected $row = 0; |
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/** |
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* |
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* A collection of `$col_values` for previous rows in bulk inserts. |
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* |
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* @var array |
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* |
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*/ |
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protected $col_values_bulk = array(); |
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/** |
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* |
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* A collection of `$bind_values` for previous rows in bulk inserts. |
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* |
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* @var array |
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* |
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*/ |
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protected $bind_values_bulk = array(); |
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/** |
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* |
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* The order in which columns will be bulk-inserted; this is taken from the |
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* very first inserted row. |
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* |
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* @var array |
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* |
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*/ |
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protected $col_order = array(); |
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/** |
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* |
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* Sets the map of fully-qualified `table.column` names to last-insert-id |
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* names. Generally useful only for extended tables in Posgres. |
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* |
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* @param array $last_insert_id_names The list of ID names. |
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* |
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*/ |
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public function setLastInsertIdNames(array $last_insert_id_names) |
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{ |
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$this->last_insert_id_names = $last_insert_id_names; |
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} |
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/** |
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* |
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* Sets the table to insert into. |
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* |
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* @param string $into The table to insert into. |
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* |
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* @return $this |
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* |
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*/ |
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public function into($into) |
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{ |
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// don't quote yet, we might need it for getLastInsertIdName() |
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$this->into = $into; |
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return $this; |
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} |
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/** |
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* |
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* Builds this query object into a string. |
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* |
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* @return string |
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* |
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*/ |
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protected function build() |
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{ |
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return 'INSERT' |
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. $this->buildFlags() |
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. $this->buildInto() |
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. $this->buildValuesForInsert() |
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. $this->buildReturning(); |
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} |
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/** |
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* |
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* Builds the INTO clause. |
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* |
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* @return string |
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* |
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*/ |
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protected function buildInto() |
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{ |
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return " INTO " . $this->quoter->quoteName($this->into); |
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} |
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/** |
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* |
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* Returns the proper name for passing to `PDO::lastInsertId()`. |
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* |
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* @param string $col The last insert ID column. |
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* |
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* @return mixed Normally null, since most drivers do not need a name; |
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* alternatively, a string from `$last_insert_id_names`. |
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* |
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*/ |
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public function getLastInsertIdName($col) |
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{ |
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$key = $this->into . '.' . $col; |
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if (isset($this->last_insert_id_names[$key])) { |
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return $this->last_insert_id_names[$key]; |
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} |
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} |
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/** |
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* |
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* Sets one column value placeholder; if an optional second parameter is |
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* passed, that value is bound to the placeholder. |
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* |
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* @param string $col The column name. |
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* |
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* @param mixed,... $val Optional: a value to bind to the placeholder. |
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* |
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* @return $this |
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* |
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*/ |
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public function col($col) |
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{ |
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return call_user_func_array(array($this, 'addCol'), func_get_args()); |
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} |
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/** |
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* |
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* Sets multiple column value placeholders. If an element is a key-value |
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* pair, the key is treated as the column name and the value is bound to |
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* that column. |
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* |
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* @param array $cols A list of column names, optionally as key-value |
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* pairs where the key is a column name and the value is a bind value for |
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* that column. |
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* |
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* @return $this |
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* |
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*/ |
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public function cols(array $cols) |
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{ |
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return $this->addCols($cols); |
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} |
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/** |
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* |
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* Sets a column value directly; the value will not be escaped, although |
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* fully-qualified identifiers in the value will be quoted. |
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* |
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* @param string $col The column name. |
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* |
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* @param string $value The column value expression. |
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* |
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* @return $this |
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* |
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*/ |
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public function set($col, $value) |
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{ |
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return $this->setCol($col, $value); |
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} |
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/** |
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* |
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* Gets the values to bind to placeholders. |
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* |
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* @return array |
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* |
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*/ |
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public function getBindValues() |
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{ |
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return array_merge(parent::getBindValues(), $this->bind_values_bulk); |
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} |
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/** |
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* |
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* Adds multiple rows for bulk insert. |
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* |
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* @param array $rows An array of rows, where each element is an array of |
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* column key-value pairs. The values are bound to placeholders. |
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* |
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* @return $this |
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* |
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*/ |
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public function addRows(array $rows) |
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{ |
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foreach ($rows as $cols) { |
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$this->addRow($cols); |
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} |
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if ($this->row > 1) { |
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$this->finishRow(); |
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} |
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return $this; |
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} |
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/** |
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* |
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* Add one row for bulk insert; increments the row counter and optionally |
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* adds columns to the new row. |
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* |
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* When adding the first row, the counter is not incremented. |
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* |
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* After calling `addRow()`, you can further call `col()`, `cols()`, and |
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* `set()` to work with the newly-added row. Calling `addRow()` again will |
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* finish off the current row and start a new one. |
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* |
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* @param array $cols An array of column key-value pairs; the values are |
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* bound to placeholders. |
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* |
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* @return $this |
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* |
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*/ |
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public function addRow(array $cols = array()) |
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{ |
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if (! $this->col_values) { |
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return $this->cols($cols); |
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} |
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if (! $this->col_order) { |
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$this->col_order = array_keys($this->col_values); |
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} |
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$this->finishRow(); |
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$this->row ++; |
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$this->cols($cols); |
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return $this; |
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} |
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/** |
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* |
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* Finishes off the current row in a bulk insert, collecting the bulk |
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* values and resetting for the next row. |
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* |
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* @return null |
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* |
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*/ |
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protected function finishRow() |
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{ |
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if (! $this->col_values) { |
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return; |
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} |
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foreach ($this->col_order as $col) { |
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$this->finishCol($col); |
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} |
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$this->col_values = array(); |
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$this->bind_values = array(); |
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} |
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/** |
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* |
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* Finishes off a single column of the current row in a bulk insert. |
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* |
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* @param string $col The column to finish off. |
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* |
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* @return null |
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* |
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* @throws Exception on named column missing from row. |
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* |
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*/ |
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protected function finishCol($col) |
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{ |
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if (! array_key_exists($col, $this->col_values)) { |
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throw new Exception("Column $col missing from row {$this->row}."); |
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} |
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// get the current col_value |
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$value = $this->col_values[$col]; |
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// is it *not* a placeholder? |
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if (substr($value, 0, 1) != ':') { |
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// copy the value as-is |
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$this->col_values_bulk[$this->row][$col] = $value; |
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return; |
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} |
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// retain col_values in bulk with the row number appended |
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$this->col_values_bulk[$this->row][$col] = "{$value}_{$this->row}"; |
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// the existing placeholder name without : or row number |
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$name = substr($value, 1); |
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// retain bind_value in bulk with new placeholder |
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if (array_key_exists($name, $this->bind_values)) { |
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$this->bind_values_bulk["{$name}_{$this->row}"] = $this->bind_values[$name]; |
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} |
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} |
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/** |
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* |
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* Builds the inserted columns and values of the statement. |
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* |
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* @return string |
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* |
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*/ |
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protected function buildValuesForInsert() |
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{ |
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if ($this->row) { |
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return $this->buildValuesForBulkInsert(); |
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} |
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return ' (' |
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. $this->indentCsv(array_keys($this->col_values)) |
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. PHP_EOL . ') VALUES (' |
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. $this->indentCsv(array_values($this->col_values)) |
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. PHP_EOL . ')'; |
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} |
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/** |
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* |
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* Builds the bulk-inserted columns and values of the statement. |
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* |
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* @return string |
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* |
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*/ |
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protected function buildValuesForBulkInsert() |
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{ |
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$this->finishRow(); |
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$cols = " (" . implode(', ', $this->col_order) . ")"; |
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$vals = array(); |
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foreach ($this->col_values_bulk as $row_values) { |
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$vals[] = " (" . implode(', ', $row_values) . ")"; |
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} |
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return PHP_EOL . $cols . PHP_EOL |
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. "VALUES" . PHP_EOL |
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. implode("," . PHP_EOL, $vals); |
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} |
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} |
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