904 lines
31 KiB
PHP
904 lines
31 KiB
PHP
<?php
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/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
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namespace Icinga\Repository;
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use Icinga\Data\Db\DbConnection;
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use Icinga\Data\Extensible;
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use Icinga\Data\Filter\Filter;
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use Icinga\Data\Reducible;
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use Icinga\Data\Updatable;
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use Icinga\Exception\IcingaException;
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use Icinga\Exception\ProgrammingError;
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use Icinga\Exception\StatementException;
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use Icinga\Util\String;
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/**
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* Abstract base class for concrete database repository implementations
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*
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* Additionally provided features:
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* <ul>
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* <li>Support for table aliases</li>
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* <li>Automatic table prefix handling</li>
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* <li>Insert, update and delete capabilities</li>
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* <li>Differentiation between statement and query columns</li>
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* <li>Capability to join additional tables depending on the columns being selected or used in a filter</li>
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* </ul>
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*/
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abstract class DbRepository extends Repository implements Extensible, Updatable, Reducible
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{
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/**
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* The datasource being used
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*
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* @var DbConnection
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*/
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protected $ds;
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/**
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* The table aliases being applied
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*
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* This must be initialized by repositories which are going to make use of table aliases. Every table for which
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* aliased columns are provided must be defined in this array using its name as key and the alias being used as
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* value. Failure to do so will result in invalid queries.
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*
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* @var array
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*/
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protected $tableAliases;
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/**
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* The statement columns being provided
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*
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* This may be initialized by repositories which are going to make use of table aliases. It allows to provide
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* alias-less column names to be used for a statement. The array needs to be in the following format:
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* <pre><code>
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* array(
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* 'table_name' => array(
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* 'column1',
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* 'alias1' => 'column2',
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* 'alias2' => 'column3'
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* )
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* )
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* <pre><code>
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*
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* @var array
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*/
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protected $statementColumns;
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/**
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* An array to map table names to statement columns/aliases
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*
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* @var array
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*/
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protected $statementAliasTableMap;
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/**
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* A flattened array to map statement columns to aliases
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*
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* @var array
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*/
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protected $statementAliasColumnMap;
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/**
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* An array to map table names to statement columns
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*
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* @var array
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*/
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protected $statementColumnTableMap;
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/**
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* A flattened array to map aliases to statement columns
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*
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* @var array
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*/
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protected $statementColumnAliasMap;
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/**
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* List of columns where the COLLATE SQL-instruction has been removed
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*
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* This list is being populated in case of a PostgreSQL backend only,
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* to ensure case-insensitive string comparison in WHERE clauses.
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*
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* @var array
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*/
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protected $columnsWithoutCollation;
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/**
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* Create a new DB repository object
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*
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* In case $this->queryColumns has already been initialized, this initializes
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* $this->columnsWithoutCollation in case of a PostgreSQL connection.
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*
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* @param DbConnection $ds The datasource to use
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*/
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public function __construct(DbConnection $ds)
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{
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parent::__construct($ds);
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$this->columnsWithoutCollation = array();
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if ($ds->getDbType() === 'pgsql' && $this->queryColumns !== null) {
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$this->queryColumns = $this->removeCollateInstruction($this->queryColumns);
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}
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}
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/**
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* Return the query columns being provided
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*
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* Initializes $this->columnsWithoutCollation in case of a PostgreSQL connection.
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*
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* @return array
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*/
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public function getQueryColumns()
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{
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if ($this->queryColumns === null) {
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$this->queryColumns = parent::getQueryColumns();
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if ($this->ds->getDbType() === 'pgsql') {
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$this->queryColumns = $this->removeCollateInstruction($this->queryColumns);
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}
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}
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return $this->queryColumns;
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}
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/**
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* Return the table aliases to be applied
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*
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* Calls $this->initializeTableAliases() in case $this->tableAliases is null.
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*
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* @return array
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*/
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public function getTableAliases()
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{
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if ($this->tableAliases === null) {
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$this->tableAliases = $this->initializeTableAliases();
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}
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return $this->tableAliases;
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}
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/**
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* Overwrite this in your repository implementation in case you need to initialize the table aliases lazily
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*
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* @return array
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*/
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protected function initializeTableAliases()
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{
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return array();
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}
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/**
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* Remove each COLLATE SQL-instruction from all given query columns
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*
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* @param array $queryColumns
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*
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* @return array $queryColumns, the updated version
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*/
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protected function removeCollateInstruction($queryColumns)
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{
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foreach ($queryColumns as & $columns) {
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foreach ($columns as & $column) {
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$column = preg_replace('/ COLLATE .+$/', '', $column, -1, $count);
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if ($count > 0) {
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$this->columnsWithoutCollation[] = $column;
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}
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}
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}
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return $queryColumns;
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}
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/**
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* Return the given table with the datasource's prefix being prepended
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*
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* @param array|string $table
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*
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* @return array|string
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*
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* @throws IcingaException In case $table is not of a supported type
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*/
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protected function prependTablePrefix($table)
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{
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$prefix = $this->ds->getTablePrefix();
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if (! $prefix) {
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return $table;
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}
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if (is_array($table)) {
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foreach ($table as & $tableName) {
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if (strpos($tableName, $prefix) === false) {
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$tableName = $prefix . $tableName;
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}
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}
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} elseif (is_string($table)) {
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$table = (strpos($table, $prefix) === false ? $prefix : '') . $table;
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} else {
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throw new IcingaException('Table prefix handling for type "%s" is not supported', type($table));
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}
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return $table;
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}
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/**
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* Remove the datasource's prefix from the given table name and return the remaining part
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*
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* @param array|string $table
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*
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* @return array|string
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*
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* @throws IcingaException In case $table is not of a supported type
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*/
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protected function removeTablePrefix($table)
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{
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$prefix = $this->ds->getTablePrefix();
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if (! $prefix) {
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return $table;
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}
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if (is_array($table)) {
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foreach ($table as & $tableName) {
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if (strpos($tableName, $prefix) === 0) {
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$tableName = str_replace($prefix, '', $tableName);
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}
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}
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} elseif (is_string($table)) {
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if (strpos($table, $prefix) === 0) {
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$table = str_replace($prefix, '', $table);
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}
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} else {
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throw new IcingaException('Table prefix handling for type "%s" is not supported', type($table));
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}
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return $table;
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}
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/**
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* Return the given table with its alias being applied
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*
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* @param array|string $table
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*
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* @return array|string
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*/
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protected function applyTableAlias($table)
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{
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$tableAliases = $this->getTableAliases();
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if (is_array($table) || !isset($tableAliases[($nonPrefixedTable = $this->removeTablePrefix($table))])) {
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return $table;
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}
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return array($tableAliases[$nonPrefixedTable] => $table);
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}
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/**
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* Return the given table with its alias being cleared
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*
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* @param array|string $table
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*
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* @return string
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*
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* @throws IcingaException In case $table is not of a supported type
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*/
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protected function clearTableAlias($table)
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{
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if (is_string($table)) {
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return $table;
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}
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if (is_array($table)) {
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return reset($table);
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}
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throw new IcingaException('Table alias handling for type "%s" is not supported', type($table));
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}
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/**
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* Insert a table row with the given data
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*
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* @param string $table
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* @param array $bind
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*/
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public function insert($table, array $bind)
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{
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$this->ds->insert($this->prependTablePrefix($table), $this->requireStatementColumns($table, $bind));
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}
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/**
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* Update table rows with the given data, optionally limited by using a filter
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*
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* @param string $table
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* @param array $bind
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* @param Filter $filter
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*/
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public function update($table, array $bind, Filter $filter = null)
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{
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if ($filter) {
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$filter = $this->requireFilter($table, $filter);
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}
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$this->ds->update($this->prependTablePrefix($table), $this->requireStatementColumns($table, $bind), $filter);
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}
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/**
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* Delete table rows, optionally limited by using a filter
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*
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* @param string $table
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* @param Filter $filter
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*/
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public function delete($table, Filter $filter = null)
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{
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if ($filter) {
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$filter = $this->requireFilter($table, $filter);
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}
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$this->ds->delete($this->prependTablePrefix($table), $filter);
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}
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/**
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* Return the statement columns being provided
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*
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* Calls $this->initializeStatementColumns() in case $this->statementColumns is null.
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*
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* @return array
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*/
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public function getStatementColumns()
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{
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if ($this->statementColumns === null) {
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$this->statementColumns = $this->initializeStatementColumns();
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}
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return $this->statementColumns;
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}
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/**
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* Overwrite this in your repository implementation in case you need to initialize the statement columns lazily
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*
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* @return array
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*/
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protected function initializeStatementColumns()
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{
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return array();
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}
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/**
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* Return an array to map table names to statement columns/aliases
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*
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* @return array
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*/
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protected function getStatementAliasTableMap()
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{
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if ($this->statementAliasTableMap === null) {
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$this->initializeStatementMaps();
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}
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return $this->statementAliasTableMap;
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}
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/**
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* Return a flattened array to map statement columns to aliases
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*
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* @return array
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*/
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protected function getStatementAliasColumnMap()
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{
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if ($this->statementAliasColumnMap === null) {
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$this->initializeStatementMaps();
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}
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return $this->statementAliasColumnMap;
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}
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/**
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* Return an array to map table names to statement columns
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*
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* @return array
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*/
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protected function getStatementColumnTableMap()
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{
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if ($this->statementColumnTableMap === null) {
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$this->initializeStatementMaps();
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}
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return $this->statementColumnTableMap;
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}
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/**
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* Return a flattened array to map aliases to statement columns
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*
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* @return array
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*/
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protected function getStatementColumnAliasMap()
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{
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if ($this->statementColumnAliasMap === null) {
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$this->initializeStatementMaps();
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}
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return $this->statementColumnAliasMap;
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}
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/**
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* Initialize $this->statementAliasTableMap and $this->statementAliasColumnMap
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*/
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protected function initializeStatementMaps()
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{
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$this->statementAliasTableMap = array();
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$this->statementAliasColumnMap = array();
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$this->statementColumnTableMap = array();
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$this->statementColumnAliasMap = array();
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foreach ($this->getStatementColumns() as $table => $columns) {
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foreach ($columns as $alias => $column) {
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$key = is_string($alias) ? $alias : $column;
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if (array_key_exists($key, $this->statementAliasTableMap)) {
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if ($this->statementAliasTableMap[$key] !== null) {
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$existingTable = $this->statementAliasTableMap[$key];
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$existingColumn = $this->statementAliasColumnMap[$key];
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$this->statementAliasTableMap[$existingTable . '.' . $key] = $existingTable;
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$this->statementAliasColumnMap[$existingTable . '.' . $key] = $existingColumn;
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$this->statementAliasTableMap[$key] = null;
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$this->statementAliasColumnMap[$key] = null;
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}
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$this->statementAliasTableMap[$table . '.' . $key] = $table;
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$this->statementAliasColumnMap[$table . '.' . $key] = $column;
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} else {
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$this->statementAliasTableMap[$key] = $table;
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$this->statementAliasColumnMap[$key] = $column;
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}
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if (array_key_exists($column, $this->statementColumnTableMap)) {
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if ($this->statementColumnTableMap[$column] !== null) {
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$existingTable = $this->statementColumnTableMap[$column];
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$existingAlias = $this->statementColumnAliasMap[$column];
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$this->statementColumnTableMap[$existingTable . '.' . $column] = $existingTable;
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$this->statementColumnAliasMap[$existingTable . '.' . $column] = $existingAlias;
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$this->statementColumnTableMap[$column] = null;
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$this->statementColumnAliasMap[$column] = null;
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}
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$this->statementColumnTableMap[$table . '.' . $column] = $table;
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$this->statementColumnAliasMap[$table . '.' . $column] = $key;
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} else {
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$this->statementColumnTableMap[$column] = $table;
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$this->statementColumnAliasMap[$column] = $key;
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}
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}
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}
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}
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/**
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* Return whether this repository is capable of converting values for the given table and optional column
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*
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* This does not check whether any conversion for the given table is available if $column is not given, as it
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* may be possible that columns from another table where joined in which would otherwise not being converted.
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*
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* @param array|string $table
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* @param string $column
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*
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* @return bool
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*/
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public function providesValueConversion($table, $column = null)
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{
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if ($column !== null) {
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if ($this->validateQueryColumnAssociation($table, $column)) {
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return parent::providesValueConversion(
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$this->removeTablePrefix($this->clearTableAlias($table)),
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$column
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);
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}
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if (($tableName = $this->findTableName($column))) {
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return parent::providesValueConversion($tableName, $column);
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}
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return false;
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}
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$conversionRules = $this->getConversionRules();
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return !empty($conversionRules);
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}
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/**
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* Return the name of the conversion method for the given alias or column name and context
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*
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* If a query column or a filter column, which is part of a query filter, needs to be converted,
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* you'll need to pass $query, otherwise the column is considered a statement column.
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*
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* @param string $table The datasource's table
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* @param string $name The alias or column name for which to return a conversion method
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* @param string $context The context of the conversion: persist or retrieve
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* @param RepositoryQuery $query If given the column is considered a query column,
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* statement column otherwise
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*
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* @return string
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*
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* @throws ProgrammingError In case a conversion rule is found but not any conversion method
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*/
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protected function getConverter($table, $name, $context, RepositoryQuery $query = null)
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{
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if (
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($query !== null && $this->validateQueryColumnAssociation($table, $name))
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|| ($query === null && $this->validateStatementColumnAssociation($table, $name))
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) {
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$table = $this->removeTablePrefix($this->clearTableAlias($table));
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} else {
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$table = $this->findTableName($name);
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if (! $table) {
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throw new ProgrammingError('Column name validation seems to have failed. Did you require the column?');
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}
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}
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return parent::getConverter($table, $name, $context, $query);
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}
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/**
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* Validate that the requested table exists
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*
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* This will prepend the datasource's table prefix and will apply the table's alias, if any.
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*
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* @param string $table The table to validate
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* @param RepositoryQuery $query An optional query to pass as context
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* (unused by the base implementation)
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*
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* @return array|string
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*
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* @throws ProgrammingError In case the given table does not exist
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*/
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public function requireTable($table, RepositoryQuery $query = null)
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{
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$statementColumns = $this->getStatementColumns();
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if (! isset($statementColumns[$table])) {
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$table = parent::requireTable($table);
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}
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return $this->prependTablePrefix($this->applyTableAlias($table));
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}
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|
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/**
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* Recurse the given filter, require each column for the given table and convert all values
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*
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* In case of a PostgreSQL connection, this applies LOWER() on the column and strtolower()
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* on the value if a COLLATE SQL-instruction is part of the resolved column.
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*
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* @param string $table The table being filtered
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* @param Filter $filter The filter to recurse
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* @param RepositoryQuery $query An optional query to pass as context
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* (Directly passed through to $this->requireFilterColumn)
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* @param bool $clone Whether to clone $filter first
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*
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* @return Filter The udpated filter
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*/
|
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public function requireFilter($table, Filter $filter, RepositoryQuery $query = null, $clone = true)
|
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{
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$filter = parent::requireFilter($table, $filter, $query, $clone);
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if ($filter->isExpression()) {
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$column = $filter->getColumn();
|
|
if (in_array($column, $this->columnsWithoutCollation) && strpos($column, 'LOWER') !== 0) {
|
|
$filter->setColumn('LOWER(' . $column . ')');
|
|
$expression = $filter->getExpression();
|
|
if (is_array($expression)) {
|
|
$filter->setExpression(array_map('strtolower', $expression));
|
|
} else {
|
|
$filter->setExpression(strtolower($expression));
|
|
}
|
|
}
|
|
}
|
|
|
|
return $filter;
|
|
}
|
|
|
|
/**
|
|
* Return this repository's query columns of the given table mapped to their respective aliases
|
|
*
|
|
* @param array|string $table
|
|
*
|
|
* @return array
|
|
*
|
|
* @throws ProgrammingError In case $table does not exist
|
|
*/
|
|
public function requireAllQueryColumns($table)
|
|
{
|
|
return parent::requireAllQueryColumns($this->removeTablePrefix($this->clearTableAlias($table)));
|
|
}
|
|
|
|
/**
|
|
* Return the query column name for the given alias or null in case the alias does not exist
|
|
*
|
|
* @param array|string $table
|
|
* @param string $alias
|
|
*
|
|
* @return string|null
|
|
*/
|
|
public function resolveQueryColumnAlias($table, $alias)
|
|
{
|
|
return parent::resolveQueryColumnAlias($this->removeTablePrefix($this->clearTableAlias($table)), $alias);
|
|
}
|
|
|
|
/**
|
|
* Return the alias for the given query column name or null in case the query column name does not exist
|
|
*
|
|
* @param array|string $table
|
|
* @param string $column
|
|
*
|
|
* @return string|null
|
|
*/
|
|
public function reassembleQueryColumnAlias($table, $column)
|
|
{
|
|
$alias = parent::reassembleQueryColumnAlias($this->removeTablePrefix($this->clearTableAlias($table)), $column);
|
|
if (
|
|
$alias === null
|
|
&& !$this->validateQueryColumnAssociation($table, $column)
|
|
&& ($tableName = $this->findTableName($column))
|
|
) {
|
|
return parent::reassembleQueryColumnAlias($tableName, $column);
|
|
}
|
|
|
|
return $alias;
|
|
}
|
|
|
|
/**
|
|
* Return whether the given query column name or alias is available in the given table
|
|
*
|
|
* @param array|string $table
|
|
* @param string $column
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function validateQueryColumnAssociation($table, $column)
|
|
{
|
|
return parent::validateQueryColumnAssociation(
|
|
$this->removeTablePrefix($this->clearTableAlias($table)),
|
|
$column
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Validate that the given column is a valid query target and return it or the actual name if it's an alias
|
|
*
|
|
* Attempts to join the given column from a different table if its association to the given table cannot be
|
|
* verified.
|
|
*
|
|
* @param array|string $table The table where to look for the column or alias
|
|
* @param string $name The name or alias of the column to validate
|
|
* @param RepositoryQuery $query An optional query to pass as context,
|
|
* if not given no join will be attempted
|
|
*
|
|
* @return string The given column's name
|
|
*
|
|
* @throws QueryException In case the given column is not a valid query column
|
|
*/
|
|
public function requireQueryColumn($table, $name, RepositoryQuery $query = null)
|
|
{
|
|
if ($query === null || $this->validateQueryColumnAssociation($table, $name)) {
|
|
return parent::requireQueryColumn($this->removeTablePrefix($this->clearTableAlias($table)), $name, $query);
|
|
}
|
|
|
|
return $this->joinColumn($name, $table, $query);
|
|
}
|
|
|
|
/**
|
|
* Validate that the given column is a valid filter target and return it or the actual name if it's an alias
|
|
*
|
|
* Attempts to join the given column from a different table if its association to the given table cannot be
|
|
* verified.
|
|
*
|
|
* @param array|string $table The table where to look for the column or alias
|
|
* @param string $name The name or alias of the column to validate
|
|
* @param RepositoryQuery $query An optional query to pass as context,
|
|
* if not given the column is considered being used for a statement filter
|
|
*
|
|
* @return string The given column's name
|
|
*
|
|
* @throws QueryException In case the given column is not a valid filter column
|
|
*/
|
|
public function requireFilterColumn($table, $name, RepositoryQuery $query = null)
|
|
{
|
|
if ($query === null) {
|
|
return $this->requireStatementColumn($table, $name);
|
|
}
|
|
|
|
if ($this->validateQueryColumnAssociation($table, $name)) {
|
|
return parent::requireFilterColumn($this->removeTablePrefix($this->clearTableAlias($table)), $name, $query);
|
|
}
|
|
|
|
return $this->joinColumn($name, $table, $query);
|
|
}
|
|
|
|
/**
|
|
* Return the statement column name for the given alias or null in case the alias does not exist
|
|
*
|
|
* @param array|string $table
|
|
* @param string $alias
|
|
*
|
|
* @return string|null
|
|
*/
|
|
public function resolveStatementColumnAlias($table, $alias)
|
|
{
|
|
$statementAliasColumnMap = $this->getStatementAliasColumnMap();
|
|
if (isset($statementAliasColumnMap[$alias])) {
|
|
return $statementAliasColumnMap[$alias];
|
|
}
|
|
|
|
$prefixedAlias = $this->removeTablePrefix($this->clearTableAlias($table)) . '.' . $alias;
|
|
if (isset($statementAliasColumnMap[$prefixedAlias])) {
|
|
return $statementAliasColumnMap[$prefixedAlias];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return the alias for the given statement column name or null in case the statement column does not exist
|
|
*
|
|
* @param array|string $table
|
|
* @param string $column
|
|
*
|
|
* @return string|null
|
|
*/
|
|
public function reassembleStatementColumnAlias($table, $column)
|
|
{
|
|
$statementColumnAliasMap = $this->getStatementColumnAliasMap();
|
|
if (isset($statementColumnAliasMap[$column])) {
|
|
return $statementColumnAliasMap[$column];
|
|
}
|
|
|
|
$prefixedColumn = $this->removeTablePrefix($this->clearTableAlias($table)) . '.' . $column;
|
|
if (isset($statementColumnAliasMap[$prefixedColumn])) {
|
|
return $statementColumnAliasMap[$prefixedColumn];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return whether the given alias or statement column name is available in the given table
|
|
*
|
|
* @param array|string $table
|
|
* @param string $alias
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function validateStatementColumnAssociation($table, $alias)
|
|
{
|
|
$tableName = $this->removeTablePrefix($this->clearTableAlias($table));
|
|
|
|
$statementAliasTableMap = $this->getStatementAliasTableMap();
|
|
if (isset($statementAliasTableMap[$alias])) {
|
|
return $statementAliasTableMap[$alias] === $tableName;
|
|
}
|
|
|
|
$statementColumnTableMap = $this->getStatementColumnTableMap();
|
|
if (isset($statementColumnTableMap[$alias])) {
|
|
return $statementColumnTableMap[$alias] === $tableName;
|
|
}
|
|
|
|
$prefixedAlias = $tableName . '.' . $alias;
|
|
return isset($statementAliasTableMap[$prefixedAlias]) || isset($statementColumnTableMap[$prefixedAlias]);
|
|
}
|
|
|
|
/**
|
|
* Return whether the given column name or alias of the given table is a valid statement column
|
|
*
|
|
* @param array|string $table The table where to look for the column or alias
|
|
* @param string $name The column name or alias to check
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function hasStatementColumn($table, $name)
|
|
{
|
|
if (
|
|
($this->resolveStatementColumnAlias($table, $name) === null
|
|
&& $this->reassembleStatementColumnAlias($table, $name) === null)
|
|
|| !$this->validateStatementColumnAssociation($table, $name)
|
|
) {
|
|
return parent::hasStatementColumn($this->removeTablePrefix($this->clearTableAlias($table)), $name);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Validate that the given column is a valid statement column and return it or the actual name if it's an alias
|
|
*
|
|
* @param array|string $table The table for which to require the column
|
|
* @param string $name The name or alias of the column to validate
|
|
*
|
|
* @return string The given column's name
|
|
*
|
|
* @throws StatementException In case the given column is not a statement column
|
|
*/
|
|
public function requireStatementColumn($table, $name)
|
|
{
|
|
if (($column = $this->resolveStatementColumnAlias($table, $name)) !== null) {
|
|
$alias = $name;
|
|
} elseif (($alias = $this->reassembleStatementColumnAlias($table, $name)) !== null) {
|
|
$column = $name;
|
|
} else {
|
|
return parent::requireStatementColumn($this->removeTablePrefix($this->clearTableAlias($table)), $name);
|
|
}
|
|
|
|
if (! $this->validateStatementColumnAssociation($table, $alias)) {
|
|
throw new StatementException(
|
|
'Statement column "%s" not found in table "%s"',
|
|
$name,
|
|
$this->removeTablePrefix($this->clearTableAlias($table))
|
|
);
|
|
}
|
|
|
|
return $column;
|
|
}
|
|
|
|
/**
|
|
* Join alias or column $name into $table using $query
|
|
*
|
|
* Attempts to find a valid table for the given alias or column name and a method labelled join<TableName>
|
|
* to process the actual join logic. If neither of those is found, ProgrammingError will be thrown.
|
|
* The method is called with the same parameters but in reversed order.
|
|
*
|
|
* @param string $name The alias or column name to join into $target
|
|
* @param array|string $target The table to join $name into
|
|
* @param RepositoryQUery $query The query to apply the JOIN-clause on
|
|
*
|
|
* @return string The resolved alias or $name
|
|
*
|
|
* @throws ProgrammingError In case no valid table or join<TableName>-method is found
|
|
*/
|
|
public function joinColumn($name, $target, RepositoryQuery $query)
|
|
{
|
|
$tableName = $this->findTableName($name);
|
|
if (! $tableName) {
|
|
throw new ProgrammingError(
|
|
'Unable to find a valid table for column "%s" to join into "%s"',
|
|
$name,
|
|
$this->removeTablePrefix($this->clearTableAlias($target))
|
|
);
|
|
}
|
|
|
|
if (($column = $this->resolveQueryColumnAlias($tableName, $name)) === null) {
|
|
$column = $name;
|
|
}
|
|
|
|
$prefixedTableName = $this->prependTablePrefix($tableName);
|
|
if ($query->getQuery()->hasJoinedTable($prefixedTableName)) {
|
|
return $column;
|
|
}
|
|
|
|
$joinMethod = 'join' . String::cname($tableName);
|
|
if (! method_exists($this, $joinMethod)) {
|
|
throw new ProgrammingError(
|
|
'Unable to join table "%s" into "%s". Method "%s" not found',
|
|
$tableName,
|
|
$this->removeTablePrefix($this->clearTableAlias($target)),
|
|
$joinMethod
|
|
);
|
|
}
|
|
|
|
$this->$joinMethod($query, $target, $name);
|
|
return $column;
|
|
}
|
|
|
|
/**
|
|
* Return the table name for the given alias or column name
|
|
*
|
|
* @param string $column
|
|
*
|
|
* @return string|null null in case no table is found
|
|
*/
|
|
protected function findTableName($column)
|
|
{
|
|
$aliasTableMap = $this->getAliasTableMap();
|
|
if (isset($aliasTableMap[$column])) {
|
|
return $aliasTableMap[$column];
|
|
}
|
|
|
|
$columnTableMap = $this->getColumnTableMap();
|
|
if (isset($columnTableMap[$column])) {
|
|
return $columnTableMap[$column];
|
|
}
|
|
|
|
// TODO(jom): Elaborate whether it makes sense to throw ProgrammingError
|
|
// instead (duplicate aliases in different tables?)
|
|
foreach ($aliasTableMap as $prefixedAlias => $table) {
|
|
if (strpos($prefixedAlias, '.') !== false) {
|
|
list($_, $alias) = explode('.', $prefixedAlias, 2);
|
|
if ($alias === $column) {
|
|
return $table;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|