protected function executeShowDatabases(ShowJob $statement, array $parameters = array()) { $result = new TemporaryResult(['DATABASE']); $list = $this->schemaManager->listSchemas(); sort($list); foreach ($list as $schemaId) { $result->addRow([$schemaId]); } return $result; }
public function executeJob(StatementJob $statement, array $parameters = array()) { /* @var $statement SelectStatement */ $defaultSchema = $this->schemaManager->getSchema(); $executionContext = new ExecutionContext($this->schemaManager, $statement, $parameters); ### COLLECT SOURCE TABLES if (!is_null($statement->getJoinDefinition())) { foreach ($statement->getJoinDefinition()->getTables() as $joinTable) { /* @var $joinTable TableJoin */ /* @var $dataSource ParenthesisPart */ $dataSource = $joinTable->getDataSource(); $tableResource = null; $alias = $dataSource->getAlias(); $dataSource = $dataSource->getContain(); if ($dataSource instanceof TableInterface) { $tableResource = $dataSource; if (is_null($alias)) { $alias = $tableResource->getName(); } } if ($dataSource instanceof SelectStatement) { /* @var $subQueryResult TemporaryResult */ $tableResource = $this->executeJob($dataSource, $parameters); } if ($dataSource instanceof TableSpecifier) { if (!is_null($dataSource->getDatabase())) { if (!$this->schemaManager->schemaExists($dataSource->getDatabase())) { throw new InvalidArgumentException("Database '{$dataSource->getDatabase()}' does not exist!"); } $schema = $this->schemaManager->getSchema($dataSource->getDatabase()); } else { $schema = $defaultSchema; } if (!$schema->tableExists($dataSource->getTable())) { throw new InvalidArgumentException("Table '{$dataSource}' does not exist!"); } if (is_null($alias)) { $alias = $dataSource->getTable(); } $tableResource = $this->tableManager->getTable($dataSource->getTable(), $dataSource->getDatabase()); } $executionContext->setTable($tableResource, (string) $alias); } } ### INIT RESULTSET $resultColumns = array(); foreach ($statement->getColumns() as $column) { if ($column === '*') { foreach ($executionContext->getTables() as $alias => $table) { /* @var $table Table */ /* @var $tableSchema TableSchema */ $tableSchema = $table->getTableSchema(); foreach ($tableSchema->getColumnIterator() as $columnPage) { /* @var $columnPage ColumnSchema */ $columnName = $columnPage->getName(); if (count($executionContext->getTables()) > 1) { $columnName = "{$alias}.{$columnName}"; } $resultColumns[] = $columnName; } } } elseif ($column instanceof ValuePart) { $resultColumns[] = $column->getAlias(); } } $result = new TemporaryResult($resultColumns); $executionContext->setCurrentResultSet(new TemporaryResult($resultColumns)); $executionContext->setCurrentSourceSet(new TemporaryResult()); ### PRE-FILTER SOURCE COLUMNS (currently not implemented) if (!is_null($statement->getCondition())) { /* @var $condition ValuePart */ $condition = $statement->getCondition(); $tableConditions = $this->findFixedConditions($condition); foreach ($executionContext->getTables() as $alias => $table) { /* @var $table TableInterface */ /* @var $tableSchema TableSchema */ $tableSchema = $table->getTableSchema(); $tableIterator = $table; $indexes = $this->findIndexesForTableConditions($tableConditions, $table, $alias); if (!empty($indexes)) { # TODO: actually choose the best index instead of using the first usable index # (We probably need table-statistics to do that.) $index = $indexes[0]; /* @var $indexSchema IndexSchema */ $indexSchema = $index->getIndexSchema(); $indexecColumns = array(); foreach ($indexSchema->getColumns() as $columnId) { $columnName = $tableSchema->getColumn($columnId)->getName(); $indexecColumns[$columnId] = $columnName; } $tableIterator = new FilteredResourceIterator($tableIterator, $condition, $this->valueResolver, $executionContext, $index, $indexecColumns); } if ($tableIterator !== $table) { $executionContext->setTable($tableIterator, $alias); } } } /* @var $joinDefinition Join */ $joinDefinition = $statement->getJoinDefinition(); if (!is_null($joinDefinition)) { ### BUILD JOIN if (count($joinDefinition->getTables()) > 1) { $iterator = new JoinIterator($joinDefinition, $executionContext, $this, $this->valueResolver, $statement, null); } else { /* @var $tableJoin TableJoin */ $tableJoin = $joinDefinition->getTables()[0]; $tableSource = $tableJoin->getDataSource(); $alias = null; while ($tableSource instanceof ParenthesisPart) { if (is_null($alias)) { $alias = $tableSource->getAlias(); } $tableSource = $tableSource->getContain(); } if ($tableSource instanceof TableSpecifier) { if (is_null($alias)) { $alias = $tableSource->getTable(); } $iterator = $executionContext->getTable($alias); } elseif ($tableSource instanceof SelectStatement) { $iterator = $this->executeJob($tableSource); } else { throw new ErrorException("Unexpected object given as source for join!"); } $iterator = new AliasedResourceIterator($iterator, $alias); } ### FILTER RESULT // WHERE condition $condition = $statement->getCondition(); if (!is_null($condition)) { if ($iterator instanceof IteratorAggreagte) { $iterator = $iterator->getIterator(); } $iterator = new FilteredResourceIterator($iterator, $condition, $this->valueResolver, $executionContext); } // ON/USING conditions from joins foreach ($joinDefinition->getTables() as $joinTable) { /* @var $joinTable TableJoin */ $joinCondition = $joinTable->getCondition(); if (!is_null($joinCondition)) { if ($iterator instanceof IteratorAggreagte) { $iterator = $iterator->getIterator(); } $iterator = new FilteredResourceIterator($iterator, $joinCondition, $this->valueResolver, $executionContext); } } ### SET UP SORTING $orderColumns = $statement->getOrderColumns(); if (count($orderColumns) > 0) { $innerIterator = $iterator; $iterator = new SortedResourceIterator($iterator, $this->valueResolver); $iterator->setTemporaryBuildChildIteratorByValue($orderColumns, $innerIterator, $executionContext); } ### WRITE RESULTSET foreach ($iterator as $dataRow) { if ($iterator instanceof UsesBinaryDataInterface && $iterator->usesBinaryData()) { $dataRow = $iterator->convertDataRowToStringRow($dataRow); } $executionContext->getCurrentSourceSet()->addRow($dataRow); $executionContext->setCurrentSourceRow($dataRow); $resolvedRow = $this->valueResolver->resolveSourceRow($statement->getColumns(), $executionContext); $executionContext->getCurrentResultSet()->addRow($resolvedRow); } } else { // no joining (something like "SELECT 5+5 as foo") $resolvedRow = $this->valueResolver->resolveSourceRow($statement->getColumns(), $executionContext); $executionContext->getCurrentResultSet()->addRow($resolvedRow); } ### UNLOCK TABLES foreach ($executionContext->getTables() as $table) { # TODO: unlock tables } ### APPLY GROUPING $groupings = $statement->getGroupings(); if (count($groupings) > 0) { foreach ($groupings as $groupingDefinition) { /* @var $groupingDefinition GroupingDefinition */ /* @var $groupingValue ValuePart */ $groupingValue = $groupingDefinition->getValue(); $beforeSourceRow = $executionContext->getCurrentSourceRow(); $groupedRows = array(); foreach ($executionContext->getCurrentSourceSet() as $row) { $executionContext->setCurrentSourceRow($row); $groupId = $this->valueResolver->resolveValue($groupingValue, $executionContext); if (!isset($groupedRows[$groupId])) { $groupedRows[$groupId] = array(); } $groupedRows[$groupId][] = $row; } $groupedResultSet = new TemporaryResult($resultColumns); foreach ($groupedRows as $groupId => $rows) { if ($groupingDefinition->getDirection() === SqlToken::T_ASC()) { $groupingMainRow = reset($rows); } else { $groupingMainRow = end($rows); } $currentGroupResultSet = new TemporaryResult(); foreach ($rows as $row) { $currentGroupResultSet->addRow($row); } $executionContext->setCurrentSourceRow($groupingMainRow); $executionContext->setCurrentSourceSet($currentGroupResultSet); $resolvedRow = $this->valueResolver->resolveSourceRow($statement->getColumns(), $executionContext); $groupedResultSet->addRow($resolvedRow); } $executionContext->setCurrentSourceRow($beforeSourceRow); $executionContext->setCurrentResultSet($groupedResultSet); } } ### APPLY RESULT-FILTER (HAVING) /* @var $resultFilter ConditionJob */ $resultFilter = $statement->getResultFilter(); if (!is_null($resultFilter)) { $filteredResult = new TemporaryResult($resultColumns); foreach ($executionContext->getCurrentResultSet() as $row) { $executionContext->setCurrentSourceRow($row); $passesFilter = (bool) $this->valueResolver->resolveValue($resultFilter, $executionContext); if ($passesFilter) { $filteredResult->addRow($row); } } $executionContext->setCurrentResultSet($filteredResult); } ### APPEND UNIONED SELECT $unionSelect = $statement->getUnionSelect(); if (!is_null($unionSelect)) { $unionResult = $this->executeJob($unionSelect, $parameters); foreach ($unionResult as $unionRow) { $executionContext->getCurrentResultSet()->addRow($unionRow); } } return $executionContext->getCurrentResultSet(); }
public function executeJob(StatementJob $statement, array $parameters = array()) { /* @var $statement DescribeStatement */ $result = new TemporaryResult(['Field', 'Type', 'Null', 'Key', 'Default', 'Extra']); $schemaId = $this->schemaManager->getCurrentlyUsedDatabaseId(); /* @var $tableSchema TableSchema */ $tableSchema = $this->schemaManager->getTableSchema($statement->getTable()->getTable(), $statement->getTable()->getDatabase()); if (is_null($tableSchema)) { throw new InvalidArgumentException("Table '{$statement->getTable()}' not found!"); } foreach ($tableSchema->getColumnIterator() as $columnId => $columnPage) { /* @var $columnPage ColumnSchema */ $fieldName = $columnPage->getName(); $dataType = $columnPage->getDataType(); $length = $columnPage->getLength(); $hasIndex = !is_null($tableSchema->getIndexIdByColumns([$columnId])); $typeString = strtolower($dataType->getName()); if ($dataType->hasLength()) { if ($columnPage->getSecondLength() > 0) { $length = "{$length},{$columnPage->getSecondLength()}"; } $typeString .= "({$length})"; } $null = $columnPage->isNotNull() ? 'NO' : 'YES'; $key = ''; if ($hasIndex) { $key = 'MUL'; if ($columnPage->isUniqueKey()) { $key = 'UNI'; } if ($columnPage->isPrimaryKey()) { $key = 'PRI'; } } $default = ""; if ($columnPage->hasDefaultValue()) { if ($columnPage->isDefaultValueInFile()) { $defaultValueFilepath = sprintf(FilePathes::FILEPATH_DEFAULT_VALUE, $schemaId, $statement->getTable(), $columnId); $this->schemaManager->getFilesystem()->getFileContents($defaultValueFilepath); } else { $default = $columnPage->getDefaultValue(); } if (!$dataType->mustResolveDefaultValue()) { $default = $this->dataConverter->convertBinaryToString($default, $dataType); } } $extraArray = array(); if ($columnPage->isAutoIncrement()) { $extraArray[] = "auto_increment"; } $result->addRow([$fieldName, $typeString, $null, $key, $default, implode(" ", $extraArray)]); } return $result; }