Final answer:
In Big SQL, Hive Meta store is utilized for maintaining table definitions, locations, and input files' storage formats.
Step-by-step explanation:
In Big SQL, Hive Meta store is used for the table definitions, location, and storage format of input files. The Hive Meta store is a central repository in the Hadoop ecosystem which stores the metadata for Hive tables and partitions in a relational database and provides clients with access to this information via the Meta store service API. It contains the details such as schema and partition metadata including column and column type information, the serializes and deserializers necessary to read and write data, and the corresponding HDFS storage locations for the table data.