Questions tagged [inheritance]
For questions about extending a base object's features into a derived object.
10 questions
5
votes
3
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Using table inheritance instead of mapping tables
This seems like a pretty common scenario: several types that all compose the same child type.
This could typically look like so:
-- 'name' is unique per parent record
CREATE TABLE sometype (
...
- 159
3
votes
1
answer
4k
views
Postgres 9.5 foreign table inheritance not using indexes
In PostgreSQL 9.5.0 I have a partitioned table that collects data by months. I tried to use the new PostgreSQL feature of foreign table inheritance and pushed one month of data to another PostgreSQL ...
2
votes
1
answer
835
views
Database relationship inheritance [closed]
I have a vehicle sales store. In my store I sale many kind of vehicles for example cars and boats. And I would like to keep track of the sales.
My vehicles has some attributes as:
Arrive on store ...
- 123
11
votes
5
answers
56k
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Insert into select into multiple related tables using INSERT_IDENTITY
Okay setting the scene. I have three tables, (Table1, Table2 and DataTable) and I want to insert into Table1 and Table2 using DataTable as source.
So for every row in DataTable I want a row in Table1 ...
- 235
7
votes
1
answer
5k
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Performance issues with inherited tables and indices
I have a PostgreSQL database with a master table and 2 child tables.
My master table:
CREATE TABLE test (
id serial PRIMARY KEY,
date timestamp without time zone
);
CREATE INDEX ON test(...
- 285
6
votes
1
answer
3k
views
Index is not used with table inheritance
I have a PostgreSQL 9.0.12 database with a master table and 2 child tables. My tables:
CREATE TABLE test2 (
id serial PRIMARY KEY,
coll character varying(15),
ts timestamp without time ...
- 285
4
votes
2
answers
4k
views
Abstract classes in SQL Server. Are they even possible?
I have a very specific question that I am surprised no one has yet asked. It involves a concrete class model and SQL Server 2016 DDL. The main point is:
In my model, some classes inherit from a base ...
- 151
2
votes
0
answers
294
views
PostgreSQL database re-design considerations
We have a 2TB PostgreSQL database, which contains two groups of tables that account for about 90% of the storage used. These two groups can be loosely described as 2 big tables partitioned, the first ...
- 1,029
1
vote
1
answer
5k
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PostgreSQL: Multiple Inheritance tables (one child to two parents)
If I have a base table and 2 or more tables that inherit from it, child1 and child2, I can insert a record into a child table and it shows up in base as you would expect.
However what I want to know ...
- 131
1
vote
0
answers
942
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Implementing a graph-like design on postgresql using CTEs and inheritance
This question is about attempting to model/design an elementary graph-like database within postgres.
The starting point is that graphs have:
Nodes
Nodes have properties
Node are connected by (bi/...
- 813