query.inc

1. 7.x includes/database/sqlite/query.inc
2. 7.x includes/database/mysql/query.inc
3. 7.x includes/database/query.inc

<?php

/**
 * @ingroup database
 * @{
 */

/**
 * @file
 * Query code for PostgreSQL embedded database engine.
 */

class InsertQuery_pgsql  extends InsertQuery {
 public function execute() {
 if (!$this->preExecute()) {
 return NULL;
 }
 $stmt = $this->connection
 ->prepareQuery ((string) $this);
 // Fetch the list of blobs and sequences used on that table.
 $table_information = $this->connection
 ->schema ()
 ->queryTableInformation ($this->table);
 $max_placeholder = 0;
 $blobs = array();
 $blob_count = 0;
 foreach ($this->insertValues as $insert_values) {
 foreach ($this->insertFields as $idx => $field) {
 if (isset($table_information->blob_fields[$field])) {
 $blobs[$blob_count] = fopen ('php://memory', 'a');
 fwrite ($blobs[$blob_count], (string) $insert_values[$idx]);
 rewind ($blobs[$blob_count]);
 $stmt->bindParam(':db_insert_placeholder_' . $max_placeholder++, $blobs[$blob_count], PDO::PARAM_LOB);
 // Pre-increment is faster in PHP than increment.
 ++$blob_count;
 }
 else {
 $stmt->bindParam(':db_insert_placeholder_' . $max_placeholder++, $insert_values[$idx]);
 }
 }
 // Check if values for a serial field has been passed.
 if (!empty($table_information->serial_fields)) {
 foreach ($table_information->serial_fields as $index => $serial_field) {
 $serial_key = array_search ($serial_field, $this->insertFields);
 if ($serial_key !== FALSE) {
 $serial_value = $insert_values[$serial_key];
 // Force $last_insert_id to the specified value. This is only done
 // if $index is 0.
 if ($index == 0) {
 $last_insert_id = $serial_value;
 }
 // Set the sequence to the bigger value of either the passed
 // value or the max value of the column. It can happen that another
 // thread calls nextval() which could lead to a serial number being
 // used twice. However, trying to insert a value into a serial
 // column should only be done in very rare cases and is not thread
 // safe by definition.
 $this->connection
 ->query ("SELECT setval('" . $table_information->sequences[$index] . "', GREATEST(MAX(" . $serial_field . "), :serial_value)) FROM {" . $this->table . "}", array(
 ':serial_value' => (int) $serial_value,
 ));
 }
 }
 }
 }
 if (!empty($this->fromQuery)) {
 // bindParam stores only a reference to the variable that is followed when
 // the statement is executed. We pass $arguments[$key] instead of $value
 // because the second argument to bindParam is passed by reference and
 // the foreach statement assigns the element to the existing reference.
 $arguments = $this->fromQuery
 ->getArguments ();
 foreach ($arguments as $key => $value) {
 $stmt->bindParam($key, $arguments[$key]);
 }
 }
 // PostgreSQL requires the table name to be specified explicitly
 // when requesting the last insert ID, so we pass that in via
 // the options array.
 $options = $this->queryOptions;
 if (!empty($table_information->sequences)) {
 $options['sequence_name'] = $table_information->sequences[0];
 }
 elseif ($options['return'] == Database::RETURN_INSERT_ID) {
 $options['return'] = Database::RETURN_NULL;
 }
 // Only use the returned last_insert_id if it is not already set.
 if (!empty($last_insert_id)) {
 $this->connection
 ->query ($stmt, array(), $options);
 }
 else {
 $last_insert_id = $this->connection
 ->query ($stmt, array(), $options);
 }
 // Re-initialize the values array so that we can re-use this query.
 $this->insertValues = array();
 return $last_insert_id;
 }
 public function __toString() {
 // Create a sanitized comment string to prepend to the query.
 $comments = $this->connection
 ->makeComment ($this->comments);
 // Default fields are always placed first for consistency.
 $insert_fields = array_merge ($this->defaultFields, $this->insertFields);
 // If we're selecting from a SelectQuery, finish building the query and
 // pass it back, as any remaining options are irrelevant.
 if (!empty($this->fromQuery)) {
 $insert_fields_string = $insert_fields ? ' (' . implode (', ', $insert_fields) . ') ' : ' ';
 return $comments . 'INSERT INTO {' . $this->table . '}' . $insert_fields_string . $this->fromQuery;
 }
 $query = $comments . 'INSERT INTO {' . $this->table . '} (' . implode (', ', $insert_fields) . ') VALUES ';
 $max_placeholder = 0;
 $values = array();
 if (!is_array ($this->insertValues)) {
 if (version_compare (PHP_VERSION, '7.4', '>=')) {
 throw new UnexpectedValueException();
 }
 else {
 drupal_trigger_fatal_error ('Unexpected Value');
 }
 }
 if (count ($this->insertValues)) {
 foreach ($this->insertValues as $insert_values) {
 $placeholders = array();
 // Default fields aren't really placeholders, but this is the most convenient
 // way to handle them.
 $placeholders = array_pad ($placeholders, count ($this->defaultFields), 'default');
 $new_placeholder = $max_placeholder + count ($insert_values);
 for ($i = $max_placeholder; $i < $new_placeholder; ++$i) {
 $placeholders[] = ':db_insert_placeholder_' . $i;
 }
 $max_placeholder = $new_placeholder;
 $values[] = '(' . implode (', ', $placeholders) . ')';
 }
 }
 else {
 // If there are no values, then this is a default-only query. We still need to handle that.
 $placeholders = array_fill (0, count ($this->defaultFields), 'default');
 $values[] = '(' . implode (', ', $placeholders) . ')';
 }
 $query .= implode (', ', $values);
 return $query;
 }
}
class UpdateQuery_pgsql  extends UpdateQuery {
 public function execute() {
 $max_placeholder = 0;
 $blobs = array();
 $blob_count = 0;
 // Because we filter $fields the same way here and in __toString(), the
 // placeholders will all match up properly.
 $stmt = $this->connection
 ->prepareQuery ((string) $this);
 // Fetch the list of blobs and sequences used on that table.
 $table_information = $this->connection
 ->schema ()
 ->queryTableInformation ($this->table);
 // Expressions take priority over literal fields, so we process those first
 // and remove any literal fields that conflict.
 $fields = $this->fields;
 $expression_fields = array();
 foreach ($this->expressionFields as $field => $data) {
 if (!empty($data['arguments'])) {
 foreach ($data['arguments'] as $placeholder => $argument) {
 // We assume that an expression will never happen on a BLOB field,
 // which is a fairly safe assumption to make since in most cases
 // it would be an invalid query anyway.
 $stmt->bindParam($placeholder, $data['arguments'][$placeholder]);
 }
 }
 unset($fields[$field]);
 }
 foreach ($fields as $field => $value) {
 $placeholder = ':db_update_placeholder_' . $max_placeholder++;
 if (isset($table_information->blob_fields[$field])) {
 $blobs[$blob_count] = fopen ('php://memory', 'a');
 fwrite ($blobs[$blob_count], (string) $value);
 rewind ($blobs[$blob_count]);
 $stmt->bindParam($placeholder, $blobs[$blob_count], PDO::PARAM_LOB);
 ++$blob_count;
 }
 else {
 $stmt->bindParam($placeholder, $fields[$field]);
 }
 }
 if (count ($this->condition)) {
 $this->condition
 ->compile ($this->connection, $this);
 $arguments = $this->condition
 ->arguments ();
 foreach ($arguments as $placeholder => $value) {
 $stmt->bindParam($placeholder, $arguments[$placeholder]);
 }
 }
 $options = $this->queryOptions;
 $options['already_prepared'] = TRUE;
 $this->connection
 ->query ($stmt, $options);
 return $stmt->rowCount ();
 }
}