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<?php
namespace Selective\Database;
use PDO;
use PDOStatement;
use RuntimeException;
/**
* Select Query.
*/
final class SelectQuery implements QueryInterface
{
/**
* @var Connection
*/
private Connection $connection;
/**
* @var PDO
*/
private PDO $pdo;
/**
* @var Quoter
*/
private Quoter $quoter;
/**
* @var array
*/
private array $columns = [];
/**
* @var string|null
*/
private ?string $alias = null;
/**
* @var string|array
*/
private $from = '';
/**
* @var array
*/
private array $join = [];
/**
* @var array
*/
private array $union = [];
/**
* @var Condition Where conditions
*/
private Condition $condition;
/**
* @var array
*/
private array $orderBy = [];
/**
* @var array
*/
private array $groupBy = [];
/**
* @var int|null
*/
private ?int $limit = null;
/**
* @var int|null
*/
private ?int $offset = null;
/**
* @var string
*/
private string $distinct = '';
/**
* @var string
*/
private string $calcFoundRows = '';
/**
* @var string
*/
private string $bufferResult = '';
/**
* @var string
*/
private string $resultSize = '';
/**
* @var string
*/
private string $straightJoin = '';
/**
* @var string
*/
private string $highPriority = '';
/**
* The constructor.
*
* @param Connection $connection The connection
*/
public function __construct(Connection $connection)
{
$this->connection = $connection;
$this->pdo = $connection->getPdo();
$this->quoter = $connection->getQuoter();
$this->condition = new Condition($connection, $this);
}
/**
* Distinct.
*
* @return self
*/
public function distinct(): self
{
$this->distinct = 'DISTINCT';
return $this;
}
/**
* Distinct row.
*
* @return self
*/
public function distinctRow(): self
{
$this->distinct = 'DISTINCTROW';
return $this;
}
/**
* Distinct row.
*
* @return self
*/
public function straightJoin(): self
{
$this->straightJoin = 'STRAIGHT_JOIN';
return $this;
}
/**
* High Priority.
*
* @return self
*/
public function highPriority(): self
{
$this->highPriority = 'HIGH_PRIORITY';
return $this;
}
/**
* Small Result.
*
* @return self
*/
public function smallResult(): self
{
$this->resultSize = 'SQL_SMALL_RESULT';
return $this;
}
/**
* Big Result.
*
* @return self
*/
public function bigResult(): self
{
$this->resultSize = 'SQL_BIG_RESULT';
return $this;
}
/**
* Buffer Result.
*
* @return self
*/
public function bufferResult(): self
{
$this->bufferResult = 'SQL_BUFFER_RESULT';
return $this;
}
/**
* Calc Found Rows.
*
* @return self
*/
public function calcFoundRows(): self
{
$this->calcFoundRows = 'SQL_CALC_FOUND_ROWS';
return $this;
}
/**
* Adds new fields to be returned by a `SELECT` statement when this query is
* executed. Fields can be passed as an array of strings, array of expression
* objects, a single expression or a single string.
*
* If an array is passed, keys will be used to alias fields using the value as the
* real field to be aliased. It is possible to alias strings, Expression objects or
* even other Query objects.
*
* This method will append any passed argument to the list of fields to be selected.
*
* @param array $columns The columns as array
*
* @return self
*/
public function columns(array $columns): self
{
if (empty($this->columns)) {
$this->columns = $columns;
} else {
foreach ($columns as $column) {
$this->columns[] = $column;
}
}
return $this;
}
/**
* Alias for sub selects.
*
* @param string $alias The alias
*
* @return self
*/
public function alias(string $alias): self
{
$this->alias = $alias;
return $this;
}
/**
* From.
*
* @param string|array $table Table name
*
* @return self
*/
public function from($table): self
{
$this->from = $table;
return $this;
}
/**
* UNION is used to combine the result from multiple
* SELECT statements into a single result set.
*
* @param SelectQuery $query The query to combine
*
* @return self
*/
public function union(SelectQuery $query): self
{
$this->union[] = ['', $query->build(false)];
return $this;
}
/**
* UNION ALL is used to combine the result from multiple
* SELECT statements into a single result set.
*
* @param SelectQuery $query The query to combine
*
* @return self
*/
public function unionAll(SelectQuery $query): self
{
$this->union[] = ['ALL', $query->build(false)];
return $this;
}
/**
* UNION DISTINCT is used to combine the result from multiple
* SELECT statements into a single result set.
*
* @param SelectQuery $query The query to combine
*
* @return self
*/
public function unionDistinct(SelectQuery $query): self
{
$this->union[] = ['DISTINCT', $query->build(false)];
return $this;
}
/**
* Join.
*
* @param string|array $table Table name
* @param string $leftField Name of the left field
* @param string $comparison Comparison (=,<,>,<=,>=,<>,in, not in, between, not between)
* @param mixed $rightField Value of the right field
*
* @return self
*/
public function join($table, string $leftField, string $comparison, $rightField): self
{
$this->join[] = ['inner', $table, $leftField, $comparison, $rightField];
return $this;
}
/**
* Inner Join (alias).
*
* @param string|array $table Table name
* @param string $leftField Name of the left field
* @param string $comparison Comparison (=,<,>,<=,>=,<>,in, not in, between, not between)
* @param mixed $rightField Value of the right field
*
* @return self
*/
public function innerJoin($table, string $leftField, string $comparison, $rightField): self
{
return $this->join($table, $leftField, $comparison, $rightField);
}
/**
* Left Join.
*
* @param string|array $table Table name
* @param string $leftField Name of the left field
* @param string $comparison Comparison (=,<,>,<=,>=,<>,in, not in, between, not between)
* @param mixed $rightField Value of the right field
*
* @return self
*/
public function leftJoin($table, string $leftField, string $comparison, $rightField): self
{
$this->join[] = ['left', $table, $leftField, $comparison, $rightField];
return $this;
}
/**
* Join with complex conditions.
*
* @param string|array $table Table name
* @param string $conditions The ON conditions e.g. 'user.id = article.user_id'
*
* @return self
*/
public function joinRaw($table, string $conditions): self
{
$this->join[] = ['inner', $table, new RawExp($conditions), null, null, null];
return $this;
}
/**
* Left join with complex conditions.
*
* @param string|array $table Table name
* @param string $conditions The ON conditions e.g. 'user.id = article.user_id'
*
* @return self
*/
public function leftJoinRaw($table, string $conditions): self
{
$this->join[] = ['left', $table, new RawExp($conditions), null, null, null];
return $this;
}
/**
* Where AND condition.
*
* @param array ...$conditions The conditions (field, comparison, value)
* or (field, comparison, new RawExp('table.field'))
* or new RawExp('...')
*
* @return self
*/
public function where(...$conditions): self
{
$this->condition->where($conditions);
return $this;
}
/**
* Add a raw AND WHERE condition.
*
* @param string $condition The raw where conditions e.g. 'user.id = article.user_id'
*
* @return self
*/
public function whereRaw(string $condition): self
{
$this->condition->where([new RawExp($condition)]);
return $this;
}
/**
* Where OR condition.
*
* @param array ...$conditions The conditions (field, comparison, value)
* or (field, comparison, new RawExp('table.field'))
* or new RawExp('...')
*
* @return self
*/
public function orWhere(...$conditions): self
{
$this->condition->orWhere($conditions);
return $this;
}
/**
* Add a raw OR WHERE condition.
*
* @param string $condition The raw where conditions e.g. 'user.id = article.user_id'
*
* @return self
*/
public function orWhereRaw(string $condition): self
{
$this->condition->orWhere([new RawExp($condition)]);
return $this;
}
/**
* The whereColumn method may be used to verify that two columns are equal.
*
* @param string $column Name of the first column
* @param string $comparison The comparison type (=,>=,<=,<>,is,is not, ....)
* @param string $secondColumn Name of the second column
*
* @return self
*/
public function whereColumn(string $column, string $comparison, string $secondColumn): self
{
$secondColumn = $this->quoter->quoteName($secondColumn);
$this->condition->where([$column, $comparison, new RawExp($secondColumn)]);
return $this;
}
/**
* The whereColumn method may be used to verify that two columns are equal.
*
* @param string $column Name of the first column
* @param string $comparison The comparison (=,>=,<=,<>,is,is not, ....)
* @param string $secondColumn Name of the second column
*
* @return self
*/
public function orWhereColumn(string $column, string $comparison, string $secondColumn): self
{
$secondColumn = $this->quoter->quoteName($secondColumn);
$this->condition->orWhere([$column, $comparison, new RawExp($secondColumn)]);
return $this;
}
/**
* Order by.
*
* @param array ...$fields Column name(s)
*
* @return self
*/
public function orderBy(...$fields): self
{
$this->orderBy = $fields;
return $this;
}
/**
* Group by.
*
* @param array ...$fields The fields
*
* @return self
*/
public function groupBy(...$fields): self
{
$this->groupBy = $fields;
return $this;
}
/**
* Add AND having condition.
*
* @param array ...$conditions The conditions (field, comparison, value)
* or (field, comparison, new RawExp('table.field'))
* or new RawExp('...')
*
* @return self
*/
public function having(...$conditions): self
{
$this->condition->having($conditions);
return $this;
}
/**
* Add OR having condition.
*
* @param array ...$conditions The conditions (field, comparison, value)
* or (field, comparison, new RawExp('table.field'))
* or new RawExp('...')
*
* @return self
*/
public function orHaving(...$conditions): self
{
$this->condition->orHaving($conditions);
return $this;
}
/**
* Add AND having condition.
*
* @param string $condition The raw HAVING conditions e.g. 'user.id = article.user_id'
*
* @return self
*/
public function havingRaw(string $condition): self
{
$this->condition->having([new RawExp($condition)]);
return $this;
}
/**
* Add OR having condition.
*
* @param string $condition The raw HAVING conditions e.g. 'user.id = article.user_id'
*
* @return self
*/
public function orHavingRaw(string $condition): self
{
$this->condition->orHaving([new RawExp($condition)]);
return $this;
}
/**
* Limit the number of rows returned.
*
* @param int $rowCount Row count
*
* @return self
*/
public function limit(int $rowCount): self
{
$this->limit = $rowCount;
return $this;
}
/**
* Offset of the first row to return.
*
* @param int $offset Offset
*
* @return self
*/
public function offset(int $offset): self
{
$this->offset = $offset;
return $this;
}
/**
* Returns a Raw Expression.
*
* @param string $value A raw value. Be careful!
*
* @return RawExp Raw Expression
*/
public function raw(string $value): RawExp
{
return new RawExp($value);
}
/**
* Executes an SQL statement, returning a result set as a PDOStatement object.
*
* @throws RuntimeException
*
* @return PDOStatement The pdo statement
*/
public function execute(): PDOStatement
{
$statement = $this->pdo->query($this->build());
if (!$statement instanceof PDOStatement) {
throw new RuntimeException('Query could not be created');
}
return $statement;
}
/**
* Prepares a statement for execution and returns a statement object.
*
* @throws RuntimeException
*
* @return PDOStatement The pdo statement
*/
public function prepare(): PDOStatement
{
$statement = $this->pdo->prepare($this->build());
if (!$statement instanceof PDOStatement) {
throw new RuntimeException('The database statement could not be prepared.');
}
return $statement;
}
/**
* SQL functions.
*
* @return FunctionBuilder The function builder
*/
public function func(): FunctionBuilder
{
return new FunctionBuilder($this->connection);
}
/**
* Build a SQL string.
*
* @param bool $complete The complete
*
* @return string SQL string
*/
public function build(bool $complete = true): string
{
$builder = new SelectQueryBuilder($this->connection);
$sql = [];
$sql = $builder->getSelectSql(
$sql,
[
$this->distinct,
$this->highPriority,
$this->straightJoin,
$this->resultSize,
$this->bufferResult,
$this->calcFoundRows,
]
);
$sql = $builder->getColumnsSql($sql, $this->columns);
$sql = $builder->getFromSql($sql, $this->from);
$sql = $builder->getJoinSql($sql, $this->join);
$sql = $this->condition->getWhereSql($sql);
$sql = $builder->getGroupBySql($sql, $this->groupBy);
$sql = $this->condition->getHavingSql($sql);
$sql = $builder->getOrderBySql($sql, $this->orderBy);
$sql = $builder->getLimitSql($sql, $this->limit, $this->offset);
$sql = $builder->getUnionSql($sql, $this->union);
$result = trim(implode(' ', $sql));
$result = $builder->getAliasSql($result, $this->alias);
if ($complete) {
$result = trim($result) . ';';
}
return $result;
}
}