temporal-database

Storing changes on entities: Is MySQL the proper solution?

由 情到浓时终转凉″ 提交于 2019-12-08 15:33:19
问题 i want to store changes that i do on my "entity" table. This should be like a log. Currently it is implemented with this table in MySQL: CREATE TABLE `entitychange` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `entity_id` int(10) unsigned NOT NULL, `entitytype` enum('STRING_1','STRING_2','SOMEBOOL','SOMEDOUBLE','SOMETIMESTAMP') NOT NULL DEFAULT 'STRING_1', `when` TIMESTAMP NOT NULL, `value` TEXT, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; entity_id = the primary key of my

Assign rows to a group based on spatial neighborhood and temporal criteria in R

由 喜欢而已 提交于 2019-12-07 20:16:50
问题 I have an issue that I just cannot seem to sort out. I have a dataset that was derived from a raster in arcgis. The dataset represents every fire occurrence during a 10-year period. Some raster cells had multiple fires within that time period (and, thus, will have multiple rows in my dataset) and some raster cells will not have had any fire (and, thus, will not be represented in my dataset). So, each row in the dataset has a column number (sequential integer) and a row number assigned to it

Assign rows to a group based on spatial neighborhood and temporal criteria in R

由 瘦欲@ 提交于 2019-12-06 12:38:34
I have an issue that I just cannot seem to sort out. I have a dataset that was derived from a raster in arcgis. The dataset represents every fire occurrence during a 10-year period. Some raster cells had multiple fires within that time period (and, thus, will have multiple rows in my dataset) and some raster cells will not have had any fire (and, thus, will not be represented in my dataset). So, each row in the dataset has a column number (sequential integer) and a row number assigned to it that corresponds with the row and column ID from the raster. It also has the date of the fire. I would

Insert Record in Temporal Table using C# Entity Framework

由 ℡╲_俬逩灬. 提交于 2019-12-05 06:19:13
问题 I'm having issue in Insertion of data in Temporal table using C# Entity Framework The Table schema is CREATE TABLE People( PeopleID int PRIMARY KEY NOT NULL, Name varchar(50) Null, LastName varchar(100) NULL, NickName varchar(25), StartTime datetime2 GENERATED ALWAYS AS ROW START NOT NULL, EndTime datetime2 GENERATED ALWAYS AS ROW END NOT NULL, PERIOD FOR SYSTEM_TIME (StartTime,EndTime) ) WITH (SYSTEM_VERSIONING = ON(HISTORY_TABLE = dbo.PeopleHistory)); I created an EDMX asusal and I tried to

Insert Record in Temporal Table using C# Entity Framework

由 ∥☆過路亽．° 提交于 2019-12-03 22:42:26
I'm having issue in Insertion of data in Temporal table using C# Entity Framework The Table schema is CREATE TABLE People( PeopleID int PRIMARY KEY NOT NULL, Name varchar(50) Null, LastName varchar(100) NULL, NickName varchar(25), StartTime datetime2 GENERATED ALWAYS AS ROW START NOT NULL, EndTime datetime2 GENERATED ALWAYS AS ROW END NOT NULL, PERIOD FOR SYSTEM_TIME (StartTime,EndTime) ) WITH (SYSTEM_VERSIONING = ON(HISTORY_TABLE = dbo.PeopleHistory)); I created an EDMX asusal and I tried to Insert a record using following C# Code using (var db = new DevDBEntities()) { People1 peo = new

Aggregate adjacent only records with T-SQL

由 喜夏-厌秋 提交于 2019-12-03 17:59:49
问题 I have (simplified for the example) a table with the following data Row Start Finish ID Amount --- --------- ---------- -- ------ 1 2008-10-01 2008-10-02 01 10 2 2008-10-02 2008-10-03 02 20 3 2008-10-03 2008-10-04 01 38 4 2008-10-04 2008-10-05 01 23 5 2008-10-05 2008-10-06 03 14 6 2008-10-06 2008-10-07 02 3 7 2008-10-07 2008-10-08 02 8 8 2008-10-08 2008-11-08 03 19 The dates represent a period in time, the ID is the state a system was in during that period and the amount is a value related to

What are the pros and cons of Anchor Modeling? [closed]

由 六眼飞鱼酱① 提交于 2019-12-03 11:33:35
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 8 months ago . I am currently trying to create a database where a very large percentage of the data is temporal. After reading through many techniques for doing this (most involving 6nf normalization) I ran into Anchor Modeling. The schema that I was developing strongly resembled the Anchor

How to implement a temporal table using JPA?

由 二次信任 提交于 2019-12-03 03:10:31
问题 I would like to know how to implement temporal tables in JPA 2 with EclipseLink. By temporal I mean tables who define validity period. One problem that I'm facing is that referencing tables can no longer have foreign keys constraints to the referenced tables (temporal tables) because of the nature of the referenced tables which now their primary keys include the validity period. How would I map the relationships of my entities? Would that mean that my entities can no longer have a

How to implement a temporal table using JPA?

由 时光总嘲笑我的痴心妄想 提交于 2019-12-02 16:41:07
I would like to know how to implement temporal tables in JPA 2 with EclipseLink. By temporal I mean tables who define validity period. One problem that I'm facing is that referencing tables can no longer have foreign keys constraints to the referenced tables (temporal tables) because of the nature of the referenced tables which now their primary keys include the validity period. How would I map the relationships of my entities? Would that mean that my entities can no longer have a relationship to those valid-time entities? Should the responsability to initialize those relationships now do by

Aggregate adjacent only records with T-SQL

由 感情迁移 提交于 2019-11-29 04:54:05
I have (simplified for the example) a table with the following data Row Start Finish ID Amount --- --------- ---------- -- ------ 1 2008-10-01 2008-10-02 01 10 2 2008-10-02 2008-10-03 02 20 3 2008-10-03 2008-10-04 01 38 4 2008-10-04 2008-10-05 01 23 5 2008-10-05 2008-10-06 03 14 6 2008-10-06 2008-10-07 02 3 7 2008-10-07 2008-10-08 02 8 8 2008-10-08 2008-11-08 03 19 The dates represent a period in time, the ID is the state a system was in during that period and the amount is a value related to that state. What I want to do is to aggregate the Amounts for adjacent rows with the same ID number,
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