This is one of the 108 Tirupatis of Lord Vishnu and the Lord here is glorified in Divya Prabhanda.
Jegath Rakshaga Perumal in Tirukoodalloor is in Ayyam Pettai. The idol of Vishnu here is in a standing positon.The Utsavar also has the same name. The thayar here is known as Pushpavalli. All the Devas gathered here to worship the Lord hence the name Tiru Koodalur.
This temple is known as Aduthurai Perumal in Vadakurangaduthurai,a village in the outskirts of Kumbakonam.
The God is believed to have appeared to sage Nandaka and Ambarisha.
A jack fruit tree with a natural shape of a conch on the stem of the tree is unique to this temple.
The legend associated and other details of the temple is given in the link here