system/Database/BaseBuilder.php
public function getCompiledUpdate(bool $reset = true): string
	{
		if ($this->validateUpdate() === false)
		{
			return false;
		}

		$sql = $this->_update($this->QBFrom[0], $this->QBSet);

		if ($reset === true)
		{
			$this->resetWrite();
		}

		return $this->compileFinalQuery($sql);
	}
public function getCompiledUpdate(bool $reset = true): string
	{
		if ($this->validateUpdate() === false)
		{
			return false;
		}

		$sql = $this->_update($this->QBFrom[0], $this->QBSet);

		if ($reset === true)
		{
			$this->resetWrite();
		}

		return $this->compileFinalQuery($sql);
	}
Get UPDATE query string

Compiles an update query and returns the sql

@param boolean $reset TRUE: reset QB values; FALSE: leave QB values alone

@return string