<?php
/**
* Part of the Joomla Framework Database Package
*
* @copyright Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Database;
use Joomla\Database\Exception\QueryTypeAlreadyDefinedException;
use Joomla\Database\Exception\UnknownTypeException;
use Joomla\Database\Query\LimitableInterface;
use Joomla\Database\Query\PreparableInterface;
/**
* Joomla Framework Query Building Interface.
*
* @since 2.0.0
*/
interface QueryInterface extends PreparableInterface, LimitableInterface
{
/**
* Convert the query object to a string.
*
* @return string
*
* @since 2.0.0
*/
public function __toString();
/**
* Add a single column, or array of columns to the CALL clause of the query.
*
* Usage:
* $query->call('a.*')->call('b.id');
* $query->call(array('a.*', 'b.id'));
*
* @param array|string $columns A string or an array of field names.
*
* @return $this
*
* @since 2.0.0
* @throws QueryTypeAlreadyDefinedException if the query type has already been defined
*/
public function call($columns);
/**
* Casts a value to a specified type.
*
* Ensure that the value is properly quoted before passing to the method.
*
* Usage:
* $query->select($query->castAs('CHAR', 'a'));
*
* @param string $type The type of string to cast as.
* @param string $value The value to cast as a char.
* @param string $length Optionally specify the length of the field (if the type supports it otherwise
* ignored).
*
* @return string SQL statement to cast the value as a char type.
*
* @since 2.0.0
* @throws UnknownTypeException When unsupported cast for a database driver
*/
public function castAs(string $type, string $value, ?string $length = null);
/**
* Gets the number of characters in a string.
*
* Note, use 'length' to find the number of bytes in a string.
*
* Usage:
* $query->select($query->charLength('a'));
*
* @param string $field A value.
* @param string|null $operator Comparison operator between charLength integer value and $condition
* @param string|null $condition Integer value to compare charLength with.
*
* @return string SQL statement to get the length of a character.
*
* @since 2.0.0
*/
public function charLength($field, $operator = null, $condition = null);
/**
* Clear data from the query or a specific clause of the query.
*
* @param string $clause Optionally, the name of the clause to clear, or nothing to clear the whole query.
*
* @return $this
*
* @since 2.0.0
*/
public function clear($clause = null);
/**
* Adds a column, or array of column names that would be used for an INSERT INTO statement.
*
* @param array|string $columns A column name, or array of column names.
*
* @return $this
*
* @since 2.0.0
*/
public function columns($columns);
/**
* Concatenates an array of column names or values.
*
* Usage:
* $query->select($query->concatenate(array('a', 'b')));
*
* @param string[] $values An array of values to concatenate.
* @param string|null $separator As separator to place between each value.
*
* @return string SQL statement representing the concatenated values.
*
* @since 2.0.0
*/
public function concatenate($values, $separator = null);
/**
* Gets the current date and time.
*
* Usage:
* $query->where('published_up < '.$query->currentTimestamp());
*
* @return string SQL statement to get the current timestamp.
*
* @since 2.0.0
*/
public function currentTimestamp();
/**
* Add a table name to the DELETE clause of the query.
*
* Usage:
* $query->delete('#__a')->where('id = 1');
*
* @param string $table The name of the table to delete from.
*
* @return $this
*
* @since 2.0.0
* @throws QueryTypeAlreadyDefinedException if the query type has already been defined
*/
public function delete($table = null);
/**
* Add a single column, or array of columns to the EXEC clause of the query.
*
* Usage:
* $query->exec('a.*')->exec('b.id');
* $query->exec(array('a.*', 'b.id'));
*
* @param array|string $columns A string or an array of field names.
*
* @return $this
*
* @since 2.0.0
* @throws QueryTypeAlreadyDefinedException if the query type has already been defined
*/
public function exec($columns);
/**
* Find a value in a varchar used like a set.
*
* Ensure that the value is an integer before passing to the method.
*
* Usage:
* $query->findInSet((int) $parent->id, 'a.assigned_cat_ids')
*
* @param string $value The value to search for.
* @param string $set The set of values.
*
* @return string A representation of the MySQL find_in_set() function for the driver.
*
* @since 2.0.0
*/
public function findInSet($value, $set);
/**
* Add a table to the FROM clause of the query.
*
* Usage:
* $query->select('*')->from('#__a');
* $query->select('*')->from($subquery->alias('a'));
*
* @param string|QueryInterface $table The name of the table or a QueryInterface object (or a child of it) with alias set.
*
* @return $this
*
* @since 2.0.0
*/
public function from($table);
/**
* Add alias for current query.
*
* Usage:
* $query->select('*')->from('#__a')->alias('subquery');
*
* @param string $alias Alias used for a JDatabaseQuery.
*
* @return $this
*
* @since 2.0.0
*/
public function alias($alias);
/**
* Used to get a string to extract year from date column.
*
* Usage:
* $query->select($query->year($query->quoteName('dateColumn')));
*
* @param string $date Date column containing year to be extracted.
*
* @return string SQL statement to get the year from a date value.
*
* @since 2.0.0
*/
public function year($date);
/**
* Used to get a string to extract month from date column.
*
* Usage:
* $query->select($query->month($query->quoteName('dateColumn')));
*
* @param string $date Date column containing month to be extracted.
*
* @return string SQL statement to get the month from a date value.
*
* @since 2.0.0
*/
public function month($date);
/**
* Used to get a string to extract day from date column.
*
* Usage:
* $query->select($query->day($query->quoteName('dateColumn')));
*
* @param string $date Date column containing day to be extracted.
*
* @return string SQL statement to get the day from a date value.
*
* @since 2.0.0
*/
public function day($date);
/**
* Used to get a string to extract hour from date column.
*
* Usage:
* $query->select($query->hour($query->quoteName('dateColumn')));
*
* @param string $date Date column containing hour to be extracted.
*
* @return string SQL statement to get the hour from a date/time value.
*
* @since 2.0.0
*/
public function hour($date);
/**
* Used to get a string to extract minute from date column.
*
* Usage:
* $query->select($query->minute($query->quoteName('dateColumn')));
*
* @param string $date Date column containing minute to be extracted.
*
* @return string SQL statement to get the minute from a date/time value.
*
* @since 2.0.0
*/
public function minute($date);
/**
* Used to get a string to extract seconds from date column.
*
* Usage:
* $query->select($query->second($query->quoteName('dateColumn')));
*
* @param string $date Date column containing second to be extracted.
*
* @return string SQL statement to get the second from a date/time value.
*
* @since 2.0.0
*/
public function second($date);
/**
* Add a grouping column to the GROUP clause of the query.
*
* Usage:
* $query->group('id');
*
* @param array|string $columns A string or array of ordering columns.
*
* @return $this
*
* @since 2.0.0
*/
public function group($columns);
/**
* Aggregate function to get input values concatenated into a string, separated by delimiter
*
* Usage:
* $query->groupConcat('id', ',');
*
* @param string $expression The expression to apply concatenation to, this may be a column name or complex SQL statement.
* @param string $separator The delimiter of each concatenated value
*
* @return string Input values concatenated into a string, separated by delimiter
*
* @since 2.0.0
*/
public function groupConcat($expression, $separator = ',');
/**
* A conditions to the HAVING clause of the query.
*
* Usage:
* $query->group('id')->having('COUNT(id) > 5');
*
* @param array|string $conditions A string or array of columns.
* @param string $glue The glue by which to join the conditions. Defaults to AND.
*
* @return $this
*
* @since 2.0.0
*/
public function having($conditions, $glue = 'AND');
/**
* Add a table name to the INSERT clause of the query.
*
* Usage:
* $query->insert('#__a')->set('id = 1');
* $query->insert('#__a')->columns('id, title')->values('1,2')->values('3,4');
* $query->insert('#__a')->columns('id, title')->values(array('1,2', '3,4'));
*
* @param string $table The name of the table to insert data into.
* @param boolean $incrementField The name of the field to auto increment.
*
* @return $this
*
* @since 2.0.0
* @throws QueryTypeAlreadyDefinedException if the query type has already been defined
*/
public function insert($table, $incrementField = false);
/**
* Add a JOIN clause to the query.
*
* Usage:
* $query->join('INNER', 'b', 'b.id = a.id);
*
* @param string $type The type of join. This string is prepended to the JOIN keyword.
* @param string $table The name of table.
* @param string $condition The join condition.
*
* @return $this
*
* @since 2.0.0
*/
public function join($type, $table, $condition = null);
/**
* Get the length of a string in bytes.
*
* Note, use 'charLength' to find the number of characters in a string.
*
* Usage:
* query->where($query->length('a').' > 3');
*
* @param string $value The string to measure.
*
* @return integer
*
* @since 2.0.0
*/
public function length($value);
/**
* Get the null or zero representation of a timestamp for the database driver.
*
* This method is provided for use where the query object is passed to a function for modification.
* If you have direct access to the database object, it is recommended you use the nullDate method directly.
*
* Usage:
* $query->where('modified_date <> '.$query->nullDate());
*
* @param boolean $quoted Optionally wraps the null date in database quotes (true by default).
*
* @return string Null or zero representation of a timestamp.
*
* @since 2.0.0
* @throws \RuntimeException
*/
public function nullDate($quoted = true);
/**
* Generate a SQL statement to check if column represents a zero or null datetime.
*
* Usage:
* $query->where($query->isNullDatetime('modified_date'));
*
* @param string $column A column name.
*
* @return string
*
* @since 2.0.0
*/
public function isNullDatetime($column);
/**
* Add an ordering column to the ORDER clause of the query.
*
* Usage:
* $query->order('foo')->order('bar');
* $query->order(array('foo','bar'));
*
* @param array|string $columns A string or array of ordering columns.
*
* @return $this
*
* @since 2.0.0
*/
public function order($columns);
/**
* Wrap an SQL statement identifier name such as column, table or database names in quotes to prevent injection
* risks and reserved word conflicts.
*
* This method is provided for use where the query object is passed to a function for modification.
* If you have direct access to the database object, it is recommended you use the quoteName method directly.
*
* Note that 'qn' is an alias for this method as it is in DatabaseDriver.
*
* Usage:
* $query->quoteName('#__a');
* $query->qn('#__a');
*
* @param array|string $name The identifier name to wrap in quotes, or an array of identifier names to wrap in quotes.
* Each type supports dot-notation name.
* @param array|string $as The AS query part associated to $name. It can be string or array, in latter case it has to be
* same length of $name; if is null there will not be any AS part for string or array element.
*
* @return array|string The quote wrapped name, same type of $name.
*
* @since 1.0
* @throws \RuntimeException if the internal db property is not a valid object.
*/
public function quoteName($name, $as = null);
/**
* Get the function to return a random floating-point value
*
* Usage:
* $query->rand();
*
* @return string
*
* @since 2.0.0
*/
public function rand();
/**
* Get the regular expression operator
*
* Usage:
* $query->where('field ' . $query->regexp($search));
*
* @param string $value The regex pattern.
*
* @return string
*
* @since 2.0.0
*/
public function regexp($value);
/**
* Add a single column, or array of columns to the SELECT clause of the query.
*
* Usage:
* $query->select('a.*')->select('b.id');
* $query->select(array('a.*', 'b.id'));
*
* @param array|string $columns A string or an array of field names.
*
* @return $this
*
* @since 2.0.0
* @throws QueryTypeAlreadyDefinedException if the query type has already been defined
*/
public function select($columns);
/**
* Return the number of the current row.
*
* Usage:
* $query->select('id');
* $query->selectRowNumber('ordering,publish_up DESC', 'new_ordering');
* $query->from('#__content');
*
* @param string $orderBy An expression of ordering for window function.
* @param string $orderColumnAlias An alias for new ordering column.
*
* @return $this
*
* @since 2.0.0
* @throws \RuntimeException
*/
public function selectRowNumber($orderBy, $orderColumnAlias);
/**
* Add a single condition string, or an array of strings to the SET clause of the query.
*
* Usage:
* $query->set('a = 1')->set('b = 2');
* $query->set(array('a = 1', 'b = 2');
*
* @param array|string $conditions A string or array of string conditions.
* @param string $glue The glue by which to join the condition strings. Defaults to `,`.
* Note that the glue is set on first use and cannot be changed.
*
* @return $this
*
* @since 2.0.0
*/
public function set($conditions, $glue = ',');
/**
* Add a table name to the UPDATE clause of the query.
*
* Usage:
* $query->update('#__foo')->set(...);
*
* @param string $table A table to update.
*
* @return $this
*
* @since 2.0.0
* @throws QueryTypeAlreadyDefinedException if the query type has already been defined
*/
public function update($table);
/**
* Adds a tuple, or array of tuples that would be used as values for an INSERT INTO statement.
*
* Usage:
* $query->values('1,2,3')->values('4,5,6');
* $query->values(array('1,2,3', '4,5,6'));
*
* @param array|string $values A single tuple, or array of tuples.
*
* @return $this
*
* @since 2.0.0
*/
public function values($values);
/**
* Add a single condition, or an array of conditions to the WHERE clause of the query.
*
* Usage:
* $query->where('a = 1')->where('b = 2');
* $query->where(array('a = 1', 'b = 2'));
*
* @param array|string $conditions A string or array of where conditions.
* @param string $glue The glue by which to join the conditions. Defaults to AND.
* Note that the glue is set on first use and cannot be changed.
*
* @return $this
*
* @since 2.0.0
*/
public function where($conditions, $glue = 'AND');
/**
* Add a WHERE IN statement to the query.
*
* Note that all values must be the same data type.
*
* Usage
* $query->whereIn('id', [1, 2, 3]);
*
* @param string $keyName Key name for the where clause
* @param array $keyValues Array of values to be matched
* @param array|string $dataType Constant corresponding to a SQL datatype. It can be an array, in this case it
* has to be same length of $keyValues
*
* @return $this
*
* @since 2.0.0
*/
public function whereIn(string $keyName, array $keyValues, $dataType = ParameterType::INTEGER);
/**
* Add a WHERE NOT IN statement to the query.
*
* Note that all values must be the same data type.
*
* Usage
* $query->whereNotIn('id', [1, 2, 3]);
*
* @param string $keyName Key name for the where clause
* @param array $keyValues Array of values to be matched
* @param array|string $dataType Constant corresponding to a SQL datatype. It can be an array, in this case it
* has to be same length of $keyValues
*
* @return $this
*
* @since 2.0.0
*/
public function whereNotIn(string $keyName, array $keyValues, $dataType = ParameterType::INTEGER);
/**
* Extend the WHERE clause with a single condition or an array of conditions, with a potentially different logical operator from the one in the
* current WHERE clause.
*
* Usage:
* $query->where(array('a = 1', 'b = 2'))->extendWhere('XOR', array('c = 3', 'd = 4'));
* will produce: WHERE ((a = 1 AND b = 2) XOR (c = 3 AND d = 4)
*
* @param string $outerGlue The glue by which to join the conditions to the current WHERE conditions.
* @param mixed $conditions A string or array of WHERE conditions.
* @param string $innerGlue The glue by which to join the conditions. Defaults to AND.
*
* @return $this
*
* @since 2.0.0
*/
public function extendWhere($outerGlue, $conditions, $innerGlue = 'AND');
/**
* Binds an array of values and returns an array of prepared parameter names.
*
* Note that all values must be the same data type.
*
* Usage:
* $query->whereIn('column in (' . implode(',', $query->bindArray($keyValues, $dataType)) . ')');
*
* @param array $values Values to bind
* @param array|string $dataType Constant corresponding to a SQL datatype. It can be an array, in this case it
* has to be same length of $key
*
* @return array An array with parameter names
*
* @since 2.0.0
*/
public function bindArray(array $values, $dataType = ParameterType::INTEGER);
/**
* Add a query to UNION with the current query.
*
* Usage:
* $query->union('SELECT name FROM #__foo')
* $query->union('SELECT name FROM #__foo', true)
*
* @param DatabaseQuery|string $query The DatabaseQuery object or string to union.
* @param boolean $distinct True to only return distinct rows from the union.
*
* @return $this
*
* @since 1.0
*/
public function union($query, $distinct = true);
/**
* Add a query to UNION ALL with the current query.
*
* Usage:
* $query->unionAll('SELECT name FROM #__foo')
*
* @param DatabaseQuery|string $query The DatabaseQuery object or string to union.
*
* @return $this
*
* @see union
* @since 1.5.0
*/
public function unionAll($query);
/**
* Set a single query to the query set.
* On this type of DatabaseQuery you can use union(), unionAll(), order() and setLimit()
*
* Usage:
* $query->querySet($query2->select('name')->from('#__foo')->order('id DESC')->setLimit(1))
* ->unionAll($query3->select('name')->from('#__foo')->order('id')->setLimit(1))
* ->order('name')
* ->setLimit(1)
*
* @param DatabaseQuery|string $query The DatabaseQuery object or string.
*
* @return $this
*
* @since 2.0.0
*/
public function querySet($query);
/**
* Create a DatabaseQuery object of type querySet from current query.
*
* Usage:
* $query->select('name')->from('#__foo')->order('id DESC')->setLimit(1)
* ->toQuerySet()
* ->unionAll($query2->select('name')->from('#__foo')->order('id')->setLimit(1))
* ->order('name')
* ->setLimit(1)
*
* @return DatabaseQuery A new object of the DatabaseQuery.
*
* @since 2.0.0
*/
public function toQuerySet();
}