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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\pgsql;
use yii\base\InvalidArgumentException;
use yii\db\Constraint;
use yii\db\Expression;
use yii\db\ExpressionInterface;
use yii\db\Query;
use yii\db\PdoValue;
use yii\helpers\StringHelper;
/**
* QueryBuilder is the query builder for PostgreSQL databases.
*
* @author Gevik Babakhani <gevikb@gmail.com>
* @since 2.0
*/
class QueryBuilder extends \yii\db\QueryBuilder
{
/**
* Defines a UNIQUE index for [[createIndex()]].
* @since 2.0.6
*/
const INDEX_UNIQUE = 'unique';
/**
* Defines a B-tree index for [[createIndex()]].
* @since 2.0.6
*/
const INDEX_B_TREE = 'btree';
/**
* Defines a hash index for [[createIndex()]].
* @since 2.0.6
*/
const INDEX_HASH = 'hash';
/**
* Defines a GiST index for [[createIndex()]].
* @since 2.0.6
*/
const INDEX_GIST = 'gist';
/**
* Defines a GIN index for [[createIndex()]].
* @since 2.0.6
*/
const INDEX_GIN = 'gin';
/**
* @var array mapping from abstract column types (keys) to physical column types (values).
*/
public $typeMap = [
Schema::TYPE_PK => 'serial NOT NULL PRIMARY KEY',
Schema::TYPE_UPK => 'serial NOT NULL PRIMARY KEY',
Schema::TYPE_BIGPK => 'bigserial NOT NULL PRIMARY KEY',
Schema::TYPE_UBIGPK => 'bigserial NOT NULL PRIMARY KEY',
Schema::TYPE_CHAR => 'char(1)',
Schema::TYPE_STRING => 'varchar(255)',
Schema::TYPE_TEXT => 'text',
Schema::TYPE_TINYINT => 'smallint',
Schema::TYPE_SMALLINT => 'smallint',
Schema::TYPE_INTEGER => 'integer',
Schema::TYPE_BIGINT => 'bigint',
Schema::TYPE_FLOAT => 'double precision',
Schema::TYPE_DOUBLE => 'double precision',
Schema::TYPE_DECIMAL => 'numeric(10,0)',
Schema::TYPE_DATETIME => 'timestamp(0)',
Schema::TYPE_TIMESTAMP => 'timestamp(0)',
Schema::TYPE_TIME => 'time(0)',
Schema::TYPE_DATE => 'date',
Schema::TYPE_BINARY => 'bytea',
Schema::TYPE_BOOLEAN => 'boolean',
Schema::TYPE_MONEY => 'numeric(19,4)',
Schema::TYPE_JSON => 'jsonb',
];
/**
* {@inheritdoc}
*/
protected function defaultConditionClasses()
{
return array_merge(parent::defaultConditionClasses(), [
'ILIKE' => 'yii\db\conditions\LikeCondition',
'NOT ILIKE' => 'yii\db\conditions\LikeCondition',
'OR ILIKE' => 'yii\db\conditions\LikeCondition',
'OR NOT ILIKE' => 'yii\db\conditions\LikeCondition',
]);
}
/**
* {@inheritdoc}
*/
protected function defaultExpressionBuilders()
{
return array_merge(parent::defaultExpressionBuilders(), [
'yii\db\ArrayExpression' => 'yii\db\pgsql\ArrayExpressionBuilder',
'yii\db\JsonExpression' => 'yii\db\pgsql\JsonExpressionBuilder',
]);
}
/**
* Builds a SQL statement for creating a new index.
* @param string $name the name of the index. The name will be properly quoted by the method.
* @param string $table the table that the new index will be created for. The table name will be properly quoted by the method.
* @param string|array $columns the column(s) that should be included in the index. If there are multiple columns,
* separate them with commas or use an array to represent them. Each column name will be properly quoted
* by the method, unless a parenthesis is found in the name.
* @param bool|string $unique whether to make this a UNIQUE index constraint. You can pass `true` or [[INDEX_UNIQUE]] to create
* a unique index, `false` to make a non-unique index using the default index type, or one of the following constants to specify
* the index method to use: [[INDEX_B_TREE]], [[INDEX_HASH]], [[INDEX_GIST]], [[INDEX_GIN]].
* @return string the SQL statement for creating a new index.
* @see http://www.postgresql.org/docs/8.2/static/sql-createindex.html
*/
public function createIndex($name, $table, $columns, $unique = false)
{
if ($unique === self::INDEX_UNIQUE || $unique === true) {
$index = false;
$unique = true;
} else {
$index = $unique;
$unique = false;
}
return ($unique ? 'CREATE UNIQUE INDEX ' : 'CREATE INDEX ') .
$this->db->quoteTableName($name) . ' ON ' .
$this->db->quoteTableName($table) .
($index !== false ? " USING $index" : '') .
' (' . $this->buildColumns($columns) . ')';
}
/**
* Builds a SQL statement for dropping an index.
* @param string $name the name of the index to be dropped. The name will be properly quoted by the method.
* @param string $table the table whose index is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping an index.
*/
public function dropIndex($name, $table)
{
if (strpos($table, '.') !== false && strpos($name, '.') === false) {
if (strpos($table, '{{') !== false) {
$table = preg_replace('/\\{\\{(.*?)\\}\\}/', '\1', $table);
list($schema, $table) = explode('.', $table);
if (strpos($schema, '%') === false)
$name = $schema.'.'.$name;
else
$name = '{{'.$schema.'.'.$name.'}}';
} else {
list($schema) = explode('.', $table);
$name = $schema.'.'.$name;
}
}
return 'DROP INDEX ' . $this->db->quoteTableName($name);
}
/**
* Builds a SQL statement for renaming a DB table.
* @param string $oldName the table to be renamed. The name will be properly quoted by the method.
* @param string $newName the new table name. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB table.
*/
public function renameTable($oldName, $newName)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($oldName) . ' RENAME TO ' . $this->db->quoteTableName($newName);
}
/**
* Creates a SQL statement for resetting the sequence value of a table's primary key.
* The sequence will be reset such that the primary key of the next new row inserted
* will have the specified value or 1.
* @param string $tableName the name of the table whose primary key sequence will be reset
* @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
* the next new row's primary key will have a value 1.
* @return string the SQL statement for resetting sequence
* @throws InvalidArgumentException if the table does not exist or there is no sequence associated with the table.
*/
public function resetSequence($tableName, $value = null)
{
$table = $this->db->getTableSchema($tableName);
if ($table !== null && $table->sequenceName !== null) {
// c.f. http://www.postgresql.org/docs/8.1/static/functions-sequence.html
$sequence = $this->db->quoteTableName($table->sequenceName);
$tableName = $this->db->quoteTableName($tableName);
if ($value === null) {
$key = $this->db->quoteColumnName(reset($table->primaryKey));
$value = "(SELECT COALESCE(MAX({$key}),0) FROM {$tableName})+1";
} else {
$value = (int) $value;
}
return "SELECT SETVAL('$sequence',$value,false)";
} elseif ($table === null) {
throw new InvalidArgumentException("Table not found: $tableName");
}
throw new InvalidArgumentException("There is not sequence associated with table '$tableName'.");
}
/**
* Builds a SQL statement for enabling or disabling integrity check.
* @param bool $check whether to turn on or off the integrity check.
* @param string $schema the schema of the tables.
* @param string $table the table name.
* @return string the SQL statement for checking integrity
*/
public function checkIntegrity($check = true, $schema = '', $table = '')
{
$enable = $check ? 'ENABLE' : 'DISABLE';
$schema = $schema ?: $this->db->getSchema()->defaultSchema;
$tableNames = $table ? [$table] : $this->db->getSchema()->getTableNames($schema);
$viewNames = $this->db->getSchema()->getViewNames($schema);
$tableNames = array_diff($tableNames, $viewNames);
$command = '';
foreach ($tableNames as $tableName) {
$tableName = $this->db->quoteTableName("{$schema}.{$tableName}");
$command .= "ALTER TABLE $tableName $enable TRIGGER ALL; ";
}
// enable to have ability to alter several tables
$this->db->getMasterPdo()->setAttribute(\PDO::ATTR_EMULATE_PREPARES, true);
return $command;
}
/**
* Builds a SQL statement for truncating a DB table.
* Explicitly restarts identity for PGSQL to be consistent with other databases which all do this by default.
* @param string $table the table to be truncated. The name will be properly quoted by the method.
* @return string the SQL statement for truncating a DB table.
*/
public function truncateTable($table)
{
return 'TRUNCATE TABLE ' . $this->db->quoteTableName($table) . ' RESTART IDENTITY';
}
/**
* Builds a SQL statement for changing the definition of a column.
* @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
* @param string $column the name of the column to be changed. The name will be properly quoted by the method.
* @param string $type the new column type. The [[getColumnType()]] method will be invoked to convert abstract
* column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept
* in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null'
* will become 'varchar(255) not null'. You can also use PostgreSQL-specific syntax such as `SET NOT NULL`.
* @return string the SQL statement for changing the definition of a column.
*/
public function alterColumn($table, $column, $type)
{
// https://github.com/yiisoft/yii2/issues/4492
// http://www.postgresql.org/docs/9.1/static/sql-altertable.html
if (!preg_match('/^(DROP|SET|RESET)\s+/i', $type)) {
$type = 'TYPE ' . $this->getColumnType($type);
}
return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ALTER COLUMN '
. $this->db->quoteColumnName($column) . ' ' . $type;
}
/**
* {@inheritdoc}
*/
public function insert($table, $columns, &$params)
{
return parent::insert($table, $this->normalizeTableRowData($table, $columns), $params);
}
/**
* {@inheritdoc}
* @see https://www.postgresql.org/docs/9.5/static/sql-insert.html#SQL-ON-CONFLICT
* @see https://stackoverflow.com/questions/1109061/insert-on-duplicate-update-in-postgresql/8702291#8702291
*/
public function upsert($table, $insertColumns, $updateColumns, &$params)
{
$insertColumns = $this->normalizeTableRowData($table, $insertColumns);
if (!is_bool($updateColumns)) {
$updateColumns = $this->normalizeTableRowData($table, $updateColumns);
}
if (version_compare($this->db->getServerVersion(), '9.5', '<')) {
return $this->oldUpsert($table, $insertColumns, $updateColumns, $params);
}
return $this->newUpsert($table, $insertColumns, $updateColumns, $params);
}
/**
* [[upsert()]] implementation for PostgreSQL 9.5 or higher.
* @param string $table
* @param array|Query $insertColumns
* @param array|bool $updateColumns
* @param array $params
* @return string
*/
private function newUpsert($table, $insertColumns, $updateColumns, &$params)
{
$insertSql = $this->insert($table, $insertColumns, $params);
list($uniqueNames, , $updateNames) = $this->prepareUpsertColumns($table, $insertColumns, $updateColumns);
if (empty($uniqueNames)) {
return $insertSql;
}
if ($updateColumns === false) {
return "$insertSql ON CONFLICT DO NOTHING";
}
if ($updateColumns === true) {
$updateColumns = [];
foreach ($updateNames as $name) {
$updateColumns[$name] = new Expression('EXCLUDED.' . $this->db->quoteColumnName($name));
}
}
list($updates, $params) = $this->prepareUpdateSets($table, $updateColumns, $params);
return $insertSql . ' ON CONFLICT (' . implode(', ', $uniqueNames) . ') DO UPDATE SET ' . implode(', ', $updates);
}
/**
* [[upsert()]] implementation for PostgreSQL older than 9.5.
* @param string $table
* @param array|Query $insertColumns
* @param array|bool $updateColumns
* @param array $params
* @return string
*/
private function oldUpsert($table, $insertColumns, $updateColumns, &$params)
{
/** @var Constraint[] $constraints */
list($uniqueNames, $insertNames, $updateNames) = $this->prepareUpsertColumns($table, $insertColumns, $updateColumns, $constraints);
if (empty($uniqueNames)) {
return $this->insert($table, $insertColumns, $params);
}
/** @var Schema $schema */
$schema = $this->db->getSchema();
if (!$insertColumns instanceof Query) {
$tableSchema = $schema->getTableSchema($table);
$columnSchemas = $tableSchema !== null ? $tableSchema->columns : [];
foreach ($insertColumns as $name => $value) {
// NULLs and numeric values must be type hinted in order to be used in SET assigments
// NVM, let's cast them all
if (isset($columnSchemas[$name])) {
$phName = self::PARAM_PREFIX . count($params);
$params[$phName] = $value;
$insertColumns[$name] = new Expression("CAST($phName AS {$columnSchemas[$name]->dbType})");
}
}
}
list(, $placeholders, $values, $params) = $this->prepareInsertValues($table, $insertColumns, $params);
$updateCondition = ['or'];
$insertCondition = ['or'];
$quotedTableName = $schema->quoteTableName($table);
foreach ($constraints as $constraint) {
$constraintUpdateCondition = ['and'];
$constraintInsertCondition = ['and'];
foreach ($constraint->columnNames as $name) {
$quotedName = $schema->quoteColumnName($name);
$constraintUpdateCondition[] = "$quotedTableName.$quotedName=\"EXCLUDED\".$quotedName";
$constraintInsertCondition[] = "\"upsert\".$quotedName=\"EXCLUDED\".$quotedName";
}
$updateCondition[] = $constraintUpdateCondition;
$insertCondition[] = $constraintInsertCondition;
}
$withSql = 'WITH "EXCLUDED" (' . implode(', ', $insertNames)
. ') AS (' . (!empty($placeholders) ? 'VALUES (' . implode(', ', $placeholders) . ')' : ltrim($values, ' ')) . ')';
if ($updateColumns === false) {
$selectSubQuery = (new Query())
->select(new Expression('1'))
->from($table)
->where($updateCondition);
$insertSelectSubQuery = (new Query())
->select($insertNames)
->from('EXCLUDED')
->where(['not exists', $selectSubQuery]);
$insertSql = $this->insert($table, $insertSelectSubQuery, $params);
return "$withSql $insertSql";
}
if ($updateColumns === true) {
$updateColumns = [];
foreach ($updateNames as $name) {
$quotedName = $this->db->quoteColumnName($name);
if (strrpos($quotedName, '.') === false) {
$quotedName = '"EXCLUDED".' . $quotedName;
}
$updateColumns[$name] = new Expression($quotedName);
}
}
list($updates, $params) = $this->prepareUpdateSets($table, $updateColumns, $params);
$updateSql = 'UPDATE ' . $this->db->quoteTableName($table) . ' SET ' . implode(', ', $updates)
. ' FROM "EXCLUDED" ' . $this->buildWhere($updateCondition, $params)
. ' RETURNING ' . $this->db->quoteTableName($table) .'.*';
$selectUpsertSubQuery = (new Query())
->select(new Expression('1'))
->from('upsert')
->where($insertCondition);
$insertSelectSubQuery = (new Query())
->select($insertNames)
->from('EXCLUDED')
->where(['not exists', $selectUpsertSubQuery]);
$insertSql = $this->insert($table, $insertSelectSubQuery, $params);
return "$withSql, \"upsert\" AS ($updateSql) $insertSql";
}
/**
* {@inheritdoc}
*/
public function update($table, $columns, $condition, &$params)
{
return parent::update($table, $this->normalizeTableRowData($table, $columns), $condition, $params);
}
/**
* Normalizes data to be saved into the table, performing extra preparations and type converting, if necessary.
*
* @param string $table the table that data will be saved into.
* @param array|Query $columns the column data (name => value) to be saved into the table or instance
* of [[yii\db\Query|Query]] to perform INSERT INTO ... SELECT SQL statement.
* Passing of [[yii\db\Query|Query]] is available since version 2.0.11.
* @return array normalized columns
* @since 2.0.9
*/
private function normalizeTableRowData($table, $columns)
{
if ($columns instanceof Query) {
return $columns;
}
if (($tableSchema = $this->db->getSchema()->getTableSchema($table)) !== null) {
$columnSchemas = $tableSchema->columns;
foreach ($columns as $name => $value) {
if (isset($columnSchemas[$name]) && $columnSchemas[$name]->type === Schema::TYPE_BINARY && is_string($value)) {
$columns[$name] = new PdoValue($value, \PDO::PARAM_LOB); // explicitly setup PDO param type for binary column
}
}
}
return $columns;
}
/**
* {@inheritdoc}
*/
public function batchInsert($table, $columns, $rows, &$params = [])
{
if (empty($rows)) {
return '';
}
$schema = $this->db->getSchema();
if (($tableSchema = $schema->getTableSchema($table)) !== null) {
$columnSchemas = $tableSchema->columns;
} else {
$columnSchemas = [];
}
$values = [];
foreach ($rows as $row) {
$vs = [];
foreach ($row as $i => $value) {
if (isset($columns[$i], $columnSchemas[$columns[$i]])) {
$value = $columnSchemas[$columns[$i]]->dbTypecast($value);
}
if (is_string($value)) {
$value = $schema->quoteValue($value);
} elseif (is_float($value)) {
// ensure type cast always has . as decimal separator in all locales
$value = StringHelper::floatToString($value);
} elseif ($value === true) {
$value = 'TRUE';
} elseif ($value === false) {
$value = 'FALSE';
} elseif ($value === null) {
$value = 'NULL';
} elseif ($value instanceof ExpressionInterface) {
$value = $this->buildExpression($value, $params);
}
$vs[] = $value;
}
$values[] = '(' . implode(', ', $vs) . ')';
}
if (empty($values)) {
return '';
}
foreach ($columns as $i => $name) {
$columns[$i] = $schema->quoteColumnName($name);
}
return 'INSERT INTO ' . $schema->quoteTableName($table)
. ' (' . implode(', ', $columns) . ') VALUES ' . implode(', ', $values);
}
}