49 lines
1.4 KiB
PHP
49 lines
1.4 KiB
PHP
<?php
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namespace Core\Driver\SQL\Expression;
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use Core\Driver\SQL\Column\Column;
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use Core\Driver\SQL\MySQL;
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use Core\Driver\SQL\PostgreSQL;
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use Core\Driver\SQL\SQL;
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use Exception;
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class DateSub extends Expression {
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private Expression $lhs;
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private Expression $rhs;
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private string $unit;
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public function __construct(Expression $lhs, Expression $rhs, string $unit) {
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$this->lhs = $lhs;
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$this->rhs = $rhs;
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$this->unit = $unit;
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}
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public function getLHS(): Expression { return $this->lhs; }
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public function getRHS(): Expression { return $this->rhs; }
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public function getUnit(): string { return $this->unit; }
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function getExpression(SQL $sql, array &$params): string {
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if ($sql instanceof MySQL) {
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$lhs = $sql->addValue($this->getLHS(), $params);
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$rhs = $sql->addValue($this->getRHS(), $params);
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$unit = $this->getUnit();
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return "DATE_SUB($lhs, INTERVAL $rhs $unit)";
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} else if ($sql instanceof PostgreSQL) {
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$lhs = $sql->addValue($this->getLHS(), $params);
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$rhs = $sql->addValue($this->getRHS(), $params);
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$unit = $this->getUnit();
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if ($this->getRHS() instanceof Column) {
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$rhs = "$rhs * INTERVAL '1 $unit'";
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} else {
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$rhs = "$rhs $unit";
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}
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return "$lhs - $rhs";
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} else {
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throw new Exception("DateSub Not implemented for driver type: " . get_class($sql));
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}
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}
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} |