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<?php |
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declare(strict_types=1); |
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namespace Doctrine\DBAL\Query\Expression; |
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use Doctrine\DBAL\Connection; |
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use function array_merge; |
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use function implode; |
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use function sprintf; |
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/** |
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* ExpressionBuilder class is responsible to dynamically create SQL query parts. |
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*/ |
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class ExpressionBuilder |
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{ |
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public const EQ = '='; |
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public const NEQ = '<>'; |
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public const LT = '<'; |
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public const LTE = '<='; |
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public const GT = '>'; |
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public const GTE = '>='; |
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/** |
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* The DBAL Connection. |
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* |
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* @var Connection |
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*/ |
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private $connection; |
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/** |
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* Initializes a new <tt>ExpressionBuilder</tt>. |
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* |
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* @param Connection $connection The DBAL Connection. |
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*/ |
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public function __construct(Connection $connection) |
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{ |
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$this->connection = $connection; |
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} |
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/** |
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* Creates a conjunction of the given expressions. |
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* |
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* @param string|CompositeExpression $expression |
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* @param string|CompositeExpression ...$expressions |
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*/ |
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public function and($expression, ...$expressions) : CompositeExpression |
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{ |
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return new CompositeExpression(CompositeExpression::TYPE_AND, array_merge([$expression], $expressions)); |
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} |
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/** |
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* Creates a disjunction of the given expressions. |
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* |
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* @param string|CompositeExpression $expression |
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* @param string|CompositeExpression ...$expressions |
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*/ |
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public function or($expression, ...$expressions) : CompositeExpression |
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{ |
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return new CompositeExpression(CompositeExpression::TYPE_OR, array_merge([$expression], $expressions)); |
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} |
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/** |
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* Creates a comparison expression. |
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* |
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* @param string $x The left expression. |
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* @param string $operator The comparison operator. |
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* @param string $y The right expression. |
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*/ |
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public function comparison(string $x, string $operator, string $y) : string |
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{ |
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return $x . ' ' . $operator . ' ' . $y; |
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} |
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/** |
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* Creates an equality comparison expression with the given arguments. |
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* |
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* First argument is considered the left expression and the second is the right expression. |
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* When converted to string, it will generated a <left expr> = <right expr>. Example: |
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* |
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* [php] |
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* // u.id = ? |
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* $expr->eq('u.id', '?'); |
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* |
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* @param string $x The left expression. |
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* @param string $y The right expression. |
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*/ |
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public function eq(string $x, string $y) : string |
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{ |
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return $this->comparison($x, self::EQ, $y); |
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} |
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/** |
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* Creates a non equality comparison expression with the given arguments. |
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* First argument is considered the left expression and the second is the right expression. |
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* When converted to string, it will generated a <left expr> <> <right expr>. Example: |
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* |
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* [php] |
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* // u.id <> 1 |
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* $q->where($q->expr()->neq('u.id', '1')); |
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* |
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* @param string $x The left expression. |
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* @param string $y The right expression. |
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*/ |
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public function neq(string $x, string $y) : string |
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{ |
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return $this->comparison($x, self::NEQ, $y); |
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} |
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/** |
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* Creates a lower-than comparison expression with the given arguments. |
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* First argument is considered the left expression and the second is the right expression. |
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* When converted to string, it will generated a <left expr> < <right expr>. Example: |
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* |
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* [php] |
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* // u.id < ? |
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* $q->where($q->expr()->lt('u.id', '?')); |
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* |
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* @param string $x The left expression. |
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* @param string $y The right expression. |
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*/ |
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public function lt(string $x, string $y) : string |
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{ |
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return $this->comparison($x, self::LT, $y); |
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} |
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/** |
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* Creates a lower-than-equal comparison expression with the given arguments. |
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* First argument is considered the left expression and the second is the right expression. |
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* When converted to string, it will generated a <left expr> <= <right expr>. Example: |
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* |
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* [php] |
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* // u.id <= ? |
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* $q->where($q->expr()->lte('u.id', '?')); |
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* |
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* @param string $x The left expression. |
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* @param string $y The right expression. |
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*/ |
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public function lte(string $x, string $y) : string |
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{ |
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return $this->comparison($x, self::LTE, $y); |
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} |
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/** |
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* Creates a greater-than comparison expression with the given arguments. |
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* First argument is considered the left expression and the second is the right expression. |
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* When converted to string, it will generated a <left expr> > <right expr>. Example: |
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* |
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* [php] |
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* // u.id > ? |
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* $q->where($q->expr()->gt('u.id', '?')); |
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* |
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* @param string $x The left expression. |
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* @param string $y The right expression. |
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*/ |
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public function gt(string $x, string $y) : string |
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{ |
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return $this->comparison($x, self::GT, $y); |
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} |
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/** |
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* Creates a greater-than-equal comparison expression with the given arguments. |
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* First argument is considered the left expression and the second is the right expression. |
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* When converted to string, it will generated a <left expr> >= <right expr>. Example: |
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* |
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* [php] |
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* // u.id >= ? |
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* $q->where($q->expr()->gte('u.id', '?')); |
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* |
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* @param string $x The left expression. |
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* @param string $y The right expression. |
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*/ |
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public function gte(string $x, string $y) : string |
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{ |
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return $this->comparison($x, self::GTE, $y); |
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} |
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/** |
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* Creates an IS NULL expression with the given arguments. |
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* |
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* @param string $x The field in string format to be restricted by IS NULL. |
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*/ |
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public function isNull(string $x) : string |
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{ |
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return $x . ' IS NULL'; |
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} |
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/** |
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* Creates an IS NOT NULL expression with the given arguments. |
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* |
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* @param string $x The field in string format to be restricted by IS NOT NULL. |
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*/ |
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public function isNotNull(string $x) : string |
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{ |
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return $x . ' IS NOT NULL'; |
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} |
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/** |
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* Creates a LIKE comparison expression. |
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* |
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* @param string $expression The expression to be inspected by the LIKE comparison |
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* @param string $pattern The pattern to compare against |
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*/ |
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public function like(string $expression, string $pattern, ?string $escapeChar = null) : string |
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{ |
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return $this->comparison($expression, 'LIKE', $pattern) . |
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($escapeChar !== null ? sprintf(' ESCAPE %s', $escapeChar) : ''); |
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} |
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/** |
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* Creates a NOT LIKE comparison expression |
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* |
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* @param string $expression The expression to be inspected by the NOT LIKE comparison |
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* @param string $pattern The pattern to compare against |
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*/ |
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public function notLike(string $expression, string $pattern, ?string $escapeChar = null) : string |
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{ |
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return $this->comparison($expression, 'NOT LIKE', $pattern) . |
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($escapeChar !== null ? sprintf(' ESCAPE %s', $escapeChar) : ''); |
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} |
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/** |
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* Creates a IN () comparison expression with the given arguments. |
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* |
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* @param string $x The field in string format to be inspected by IN() comparison. |
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* @param string|string[] $y The placeholder or the array of values to be used by IN() comparison. |
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*/ |
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public function in(string $x, $y) : string |
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{ |
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return $this->comparison($x, 'IN', '(' . implode(', ', (array) $y) . ')'); |
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} |
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/** |
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* Creates a NOT IN () comparison expression with the given arguments. |
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* |
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* @param string $x The field in string format to be inspected by NOT IN() comparison. |
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* @param string|string[] $y The placeholder or the array of values to be used by NOT IN() comparison. |
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*/ |
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public function notIn(string $x, $y) : string |
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{ |
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return $this->comparison($x, 'NOT IN', '(' . implode(', ', (array) $y) . ')'); |
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} |
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/** |
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* Creates an SQL literal expression from the string. |
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*/ |
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public function literal(string $input) : string |
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{ |
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return $this->connection->quote($input); |
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} |
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} |
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