Abstract: Systems, methods, and devices for implementing secure views for zero-copy data sharing in a multi-tenant database system are disclosed. A method includes generating a share object in a first account comprising a share role. The method includes associating view privileges for the share object such that an underlying detail of the share object comprises a secure view definition. The method includes granting, to a second account, cross-account access rights to the share role or share object in the first account. The method includes receiving a request from the second account to access data or services of the first account and providing a response to the second account based on the data or services of the first account. The method is such that the underlying detail of the share object that comprises the secure view definition is hidden from the second account and visible to the first account.

Abstract: A method, apparatus, and system for join operations of a plurality of relations that are distributed over a plurality of storage locations over a network of computing components.

Abstract: A system and method for managing data storage and data access with querying data in a distributed system without buffering the results on intermediate operations in disk storage.

Abstract: A system and method for managing data storage and data access with querying data in a distributed system without buffering the results on intermediate operations in disk storage.

Abstract: A query directed to database data stored across a set of files is received. The query includes predicates and each file from the set of files is associated with metadata stored in a metadata store that is separate from a storage platform that stores the set of files. One or more files are removed from the set of files whose metadata does not satisfy a predicate of the plurality of predicates to generate a pruned set of files. One or more predicates are removed that are satisfied by the metadata of the pruned set of files to generate a modified query.

Abstract: Systems, methods, and devices for implementing secure views for zero-copy data sharing in a multi-tenant database system are disclosed. A method includes generating a share object in a first account comprising a share role. The method includes associating view privileges for the share object such that an underlying detail of the share object comprises a secure user-defined function definition. The method includes granting, to a second account, cross-account access rights to the share role or share object in the first account. The method includes receiving a request from the second account to access data or services of the first account and providing a response to the second account based on the data or services of the first account. The method is such that the underlying detail of the share object that comprises the secure user-defined function definition is hidden from the second account and visible to the first account.

Abstract: A method, apparatus, and system for join operations of a plurality of relations that are distributed over a plurality of storage locations over a network of computing components.

Abstract: The subject technology receives a query plan, the query plan comprising a set of query operations, the set of query operations including at least one aggregation and at least one join operation. The subject technology analyzes the query plan to identify an aggregation that is redundant. The subject technology removes the aggregation based at least in part on the analyzing. The subject technology determines at least one aggregation property corresponding to at least one query operation of the query plan. The subject technology inserts at least one adaptive aggregation operator in the query plan based at least in part on the at least one aggregation property, the at least one aggregation property comprising a set of aggregation properties. The subject technology provides a modified query plan based at least in part on the inserted at least one adaptive aggregation operator in the query plan.

Abstract: A method, apparatus, and system for join operations of a plurality of relations that are distributed over a plurality of storage locations over a network of computing components.

Abstract: The subject technology receives a query plan, the query plan comprising a set of query operations, the set of query operations including at least one aggregation and at least one join operation. The subject technology analyzes the query plan to identify an aggregation that is redundant. The subject technology removes the aggregation based at least in part on the analyzing. The subject technology determines at least one aggregation property corresponding to at least one query operation of the query plan. The subject technology inserts at least one adaptive aggregation operator in the query plan based at least in part on the at least one aggregation property. The subject technology provides a modified query plan based at least in part on the inserted at least one adaptive aggregation operator in the query plan.

Abstract: Using one or more processors, generating a materialized view over a share object, the share object, including data associated with a first account. Using the one or more processors, merging the materialized view and the share object. Using the one or more processors, updating the data associated with the first account subsequent to generating the materialized view. Using the one or more processors, generating a refreshed materialized view with respect to the share object in response to detecting the updated data. Using the one or more processors, sharing the refreshed materialized view to a second account in response to a request from the second account.

Abstract: A method, apparatus, and system for join operations of a plurality of relations that are distributed over a plurality of storage locations over a network of computing components.

Abstract: A system and method for managing data storage and data access with querying data in a distributed system without buffering the results on intermediate operations in disk storage.

Abstract: The subject technology generates, using one or more processors, a materialized view over a share object, the share object including data associated with a first account. The subject technology merges, using the one or more processors, the materialized view and the share object. The subject technology updates, using the one or more processors, the data associated with the first account subsequent to generating the materialized view. The subject technology generates, using the one or more processors, a refreshed materialized view with respect to the share object in response to detecting the updated data. The subject technology shares, using the one or more processors, the refreshed materialized view to a second account in response to a request from the second account.

Abstract: The subject technology generates a materialized view over a share object, the share object including data associated with a first account. The subject technology merges the materialized view and the share object. The subject technology determines that the materialized view is stale with respect to the share object based at least in part on the merging. The subject technology generates a refreshed materialized view with respect to the share object in response to the determining. The subject technology shares the refreshed materialized view to a second account in response to a request from the second account.

Abstract: A system, apparatus, and method for processing queries wherein the query includes a request to access or delete data and accessing metadata associated with the set of data, the metadata defining data characteristics of the set of data and identifying at least sets of data that need or not need to be accessed or deleted based on the metadata without accessing the actual data in the set of data; also methods to optimize processing of some operations based on the collected metadata on data.

Abstract: The subject technology receives a query plan, the query plan comprising a set of query operations, the set of query operations including at least one aggregation and at least one join operation. The subject technology analyzes the query plan to identify an aggregation that is redundant. The subject technology removes the aggregation based at least in part on the analyzing. The subject technology determines at least one aggregation property corresponding to at least one query operation of the query plan. The subject technology inserts at least one adaptive aggregation operator in the query plan based at least in part on the at least one aggregation property. The subject technology provides a modified query plan based at least in part on the inserted at least one adaptive aggregation operator in the query plan.

Abstract: The subject technology receives a query plan, the query plan comprising a set of query operations, the set of query operations including at least one aggregation and a join operation, the join operation including a build side and a probe side. The subject technology inserts an aggregation operator below the probe side of the join operation. The subject technology causes the build side of the join operation to generate a hash table. The subject technology causes the build side of the join operation to generate a bloom filter based at least in part on the hash table and provide information, corresponding to properties of the build side, to a bloom filter. Based at least in part on the information, the subject technology determines at least one property of the join operation to determine whether to switch the aggregation operator to a pass through mode.

Abstract: A system and method for managing data storage and data access with querying data in a distributed system without buffering the results on intermediate operations in disk storage.

Abstract: A system and method for managing data storage and data access with querying data in a distributed system without buffering the results on intermediate operations in disk storage.