citus

Commit Graph

Author	SHA1	Message	Date
jeff-davis	4f213f293e	Columnar: use generate_series for test rather than load. (#5181 )	2021-08-16 16:12:06 -07:00
Hadi Moshayedi	4a9aebaa7b	Columnar: rename block to chunk	2020-12-03 08:50:19 -08:00
Nils Dijk	f89bd3eeb5	move columnar test files	2020-11-17 18:55:34 +01:00
SaitTalhaNisanci	39bbec0f30	add tests for local copy execution	2020-03-18 09:28:59 +03:00
Hadi Moshayedi	46608e42f9	Add hyperscale tutorial to the regression tests.	2019-07-10 10:47:55 +02:00
velioglu	72dfe4a289	Adds colocation check to local join	2018-04-04 22:49:27 +03:00
mehmet furkan şahin	1b06b2b306	The data used in regression tests is reduced This commit reduces the size of the data in users_table.data and events_table.data from 10K rows to 100 rows.	2017-11-28 14:15:46 +03:00
Onder Kalaci	1cb6a34ba8	Remove uninstantiated qual logic, use attribute equivalences In this PR, we aim to deduce whether each of the RTE_RELATION is joined with at least on another RTE_RELATION on their partition keys. If each RTE_RELATION follows the above rule, we can conclude that all RTE_RELATIONs are joined on their partition keys. In order to do that, we invented a new equivalence class namely: AttributeEquivalenceClass. In very simple words, a AttributeEquivalenceClass is identified by an unique id and consists of a list of AttributeEquivalenceMembers. Each AttributeEquivalenceMember is designed to identify attributes uniquely within the whole query. The necessity of this arise since varno attributes are defined within a single level of a query. Instead, here we want to identify each RTE_RELATION uniquely and try to find equality among each RTE_RELATION's partition key. Whenever we find an equality clause A = B, where both A and B originates from relation attributes (i.e., not random expressions), we create an AttributeEquivalenceClass to record this knowledge. If we later find another equivalence B = C, we create another AttributeEquivalenceClass. Finally, we can apply transitity rules and generate a new AttributeEquivalenceClass which includes A, B and C. Note that equality among the members are identified by the varattno and rteIdentity. Each equality among RTE_RELATION is saved using an AttributeEquivalenceClass where each member attribute is identified by a AttributeEquivalenceMember. In the final step, we try generate a common attribute equivalence class that holds as much as AttributeEquivalenceMembers whose attributes are a partition keys.	2017-04-13 11:51:26 +03:00
Onder Kalaci	136306a1fe	Initial commit of Citus 5.0	2016-02-11 04:05:32 +02:00

9 Commits (b9c5f6be76529bc6c89d0ae296fbcb85f341f1f2)