Abstract: A database system operates by: generating first segment addendum data indicating at least one addendum part indicating at least one change to a first segment of a plurality of segments, updating segment part activation data to indicate a first ownership sequence number (OSN) range for activation of the first segment addendum data during query execution, executing a first query, having a first ownership sequence number, based on accessing the first segment in response to first data ownership information tagged with the first ownership sequence number indicating activation of the first segment, and further based on foregoing applying of the at least one addendum part for the first segment in response to the first ownership sequence number falling outside of the first OSN range indicated in the segment part activation data for the first segment addendum data, and executing a second query, having a second ownership sequence number, based on accessing the first segment in response to second data ownership informat

Abstract: A database system is operable to generate an addendum part indicating deletion of a set of rows of a plurality of rows of a dataset based on generating a row list based on identifying the set of rows for deletion from the dataset and compressing the row list in a set of compressed blocks written to disk memory resources. Based on determining to process the addendum part, the addendum part is read based on decompressing the row list based on access in the set of compressed block in the disk memory resources and emitting the row list for processing.

Abstract: A database system is operable to execute a query transaction to generate addendum part data updating a segment A target storage node receives a plurality of sets of buffered rows and a plurality of flush requests. The target storage nodes each of a plurality of addendum parts in response to receiving a corresponding one of a plurality of flush requests. The target node assigns a plurality of version numbers to the plurality of addendum parts. A coordinator operator execution module commits only a final addendum part having a most recent version number as the addendum part data for the segment.

Abstract: A database system is operable to determine a query for execution. A disjunction of a plurality of conjunctive normal form (CNF) filtering predicates is determined based on filtering predicates of the query. An IO pipeline is generated based on the disjunction of the plurality of CNF filtering predicates that includes, based on applying at least one type of optimization, at least one shared IO element common to multiple ones of plurality of the CNF filtering predicates. The IO pipeline is executed in accordance with execution of the query to generate a filtered subset of a plurality of rows that each meet at least one of the plurality of CNF filtering predicates.

Abstract: A database system is operable to determine a query for execution. A disjunction of a plurality of conjunctive normal form (CNF) filtering predicates is determined based on filtering predicates of the query. An IO pipeline is generated based on the disjunction of the plurality of CNF filtering predicates that includes, based on applying at least one type of optimization, at least one shared IO element common to multiple ones of plurality of the CNF filtering predicates. The IO pipeline is executed in accordance with execution of the query to generate a filtered subset of a plurality of rows that each meet at least one of the plurality of CNF filtering predicates.