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Org chart CTE with exact index but plan shows expensive sort node
I've got a moderately large table (148 million rows) that's got pretty common org chart attributes to it. Names are changed, but it's the same idea. I was thinking of adding a hierarchyid column to the...
View ArticleRecursive CTE to get Grandparent, parent, children [duplicate]
I have a data structure that relies on a parent/child model. The top level parent can have multiple children where they can also be parents.Here's an example of how things can look in the tree:900107...
View ArticleOptimizing a CTE hierarchy
Update belowI have a table of accounts with a typical acct/parent account architecture to represent a hierarchy of accounts (SQL Server 2012). I created a VIEW using a CTE to hash out the hierarchy,...
View ArticleOracle 17410(connection reset) when using count(*) on cross join cte with...
Met strange behavior using query with json_table in cte at oracle - connection reset from server, without details.Illustrating artificial query is:with data as ( select 5 as some_value from dual),ps as...
View ArticleImproving query performance with two inner joins on tables that have > 40M rows
ContextI have three tables - nodes, edges and sections. This is a graph network of paths from open street maps where edges are created from two neighbouring 3D nodes (that give distance, elevation gain...
View ArticleGetting Indirect parents
I have following different tablesLeafChildsChildId, ChildName1, Child12, Child2GroupGroupId, GroupName1, Group12, Group23, AllGroupChildMappingGroupId, ChildId1, 12, 12, 2GroupGroupMappingGroupId,...
View ArticleWhy can't rows inserted in a CTE be updated in the same statement?
In PostgreSQL 9.5, given a simple table created with:create table tbl ( id serial primary key, val integer);I run SQL to INSERT a value, then UPDATE it in the same statement:WITH newval AS ( INSERT...
View ArticleHow do I return all column values for the recently inserted row/rows?
I have these two tables in a PostgreSQL 12 database:CREATE TABLE public.test ( entity_id uuid PRIMARY KEY DEFAULT uuid_generate_v4());CREATE TABLE public.test_registration ( entity_id uuid REFERENCES...
View ArticleWhy can't unused columns and tables be ignored in a recursive CTE
Usually, SQL Server can optimize away any unused columns in the execution plan, and unused joined tables are not queried. But as soon as a recursive CTE comes into play, apparently all columns and...
View Articlecalculate or get price of parent items on bill of materials
i want to calculate or get the price of parent items on bill of materials queryhere is the fiddle-> https://www.db-fiddle.com/f/o3jLgZxKNLG14mna8QGdVN/6please note in the second row, betax has qty =...
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Can CTE simplify repeated and possibly recursive joins?
I have three tables organized as depicted below, showing foreign keys and unique fields (green):That represents email messages received by a server. (Sorry I couldn't simplify more. Full version here.)...
View ArticleOrder a nested table with path index according to list_order in SQLite
I have a SQL table with this nested structure:CREATE TABLE items (`id` INTEGER, `item_name` VARCHAR(6), `parent_id` INTEGER, `list_order` INTEGER);My SQLite version does not support window function,...
View ArticleUsing a key:value pair from 1 jsonb column on table A as a filter for jsonb...
Table A with JSONB column (simplified, there is more data than just 1 k:v):{"subject": "identifier": {"system": "system-value", "value": "1234-5678"}}Table B JSONB column:{["identifier": {"otherInfo":...
View ArticleUnrecognized configuration parameter when using set_config(text, text,...
I'm trying to implement a simple ABAC system using row level security, with main policy defined as following:CREATE policy resource_access ON resourceUSING ( ( org_id::varchar =...
View ArticleCTE: Get all parents and all children in one statement
I have this working CTE example.I can select all grand-parents and all children.But how can I select all grand-parents and all children in one statement?In this example I want Grandfather, Father, Son...
View ArticleINSERT duplicate rows for multiple, cascading 1:M child tables
Imagine multiple parent-child tables with 1:M relationships. I would like to "cascade"-insert duplicate rows based on root parent table row selection.Each table has IDENTITY primary key and each child...
View ArticleHow to merge multiple rows in one column with hierarchy Postgresql 12?
I have a table like this to save the catalog of 90 services:-------------------------------------------------------------------------------------| id | service | subservice | description |...
View ArticleHow can I change string output in a hierarchy tree with PostgreSQL?
I have a table like this:-------------------------------------------------| id | description | parent_id | cost--------------------------------------------------| 1 | Radiology | NULL | 0.00| 2 | Lab...
View ArticleI would want, through recursive CTEs, a query to return all cars at...
Here is both table and data for testing:CREATE TABLE if not exists cars ( id serial PRIMARY KEY, parent_code INT, descr CHARACTER VARYING(50) NOT NULL);-- Level 1INSERT INTO cars(parent_code, descr)...
View ArticleHow to execute join statement dynamically without using static group id?...
I work on SQL server 2014 I need to run this statement below dynamically withoutusing group id staticbecause I don't know maximum group id using may be 10,15,20so How to run query below dynamically...
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