jsonb

问题 I have a table with JSONB column storing JSONB arrays/strings ( value_r column in the below example). What would be the simplest (and efficent) way to sort only content of JSONB arrays within JSONB column (storing also strings)? I've been looking for the simplest method (as query, or procedure is needed?) because I have to apply this in more complicated SQL code. Here is the test code: CREATE TABLE test_table ( id integer, ordinality bigint, key_r text, value_r jsonb ); INSERT INTO test_table

问题 Suppose I have the following parents table: create table parents ( id integer not null constraint parents_pkey primary key, name text not null, children jsonb not null ); Where children is a json array of the following structure: [ { "name": "child1", "age": 10 }, { "name": "child2", "age": 12 } ] And I need, for example, to get all parents that have children with age between 10 and 12. I create the following query: select distinct p.* from parents p, jsonb_array_elements(p.children) c where

问题 We are storing dynamic json data to a postgresql jsonb datatype field. Most of the json keys are dynamic and nested. Now I need to search one particular value inside this json data field. This value may be present with any key name. row1 = { "header": { "piecesids" : [100,200,300] }, "footer" : {"pieceids" : [500,300]} } row2 = { "header_right": { "piecesids" : [500,300,400] }, "footer_left" : {"pieceids" : [300,200]} } row3 = { "body_right": { "piecesids" : [500,300,600] }, "body_left" : {

问题 'Sup, We have a Postgres (9.6) table myTable with a row data jsonb NOT NULL : DROP TABLE myTable; CREATE TABLE myTable (data jsonb NOT NULL); We want to store object containing an array of email addresses: INSERT INTO myTable (data) VALUES ($${"email": [{"address": "A"}, {"address": "B"}]}$$); INSERT INTO myTable (data) VALUES ($${"email": [{"address": "C"}]}$$); We want to create a unique index on address to prevent insertion of row like: -- "A" NON UNIQUE, SHOULD FAIL INSERT INTO myTable

问题 Suppose I have a JSONB column called value in a table t , and inside of these blobs of JSON is a tags field which is a list of strings. I'd like to make a query for any of these JSON blobs tagged "foo" or "bar" . So suppose the table data looks like this: value --------------------- {"tags": ["other"]} {"tags": ["foo", "quux"]} {"tags": ["baz", "bar"]} {"tags": ["bar", "foo"]} {"tags": []} I want to write some sort of query like this: select value from t where value->'tags' NONEMPTY

问题 I am using Postgres 9.5, and I have the following tables: Users id UUID name TEXT Images id UUID key TEXT width INTEGER height INTEGER Posts id UUID title TEXT author_id UUID content JSONB The posts' content is like: [ { "type": "text", "text": "learning pg" }, { "type": "image", "image_id": "8f4422b4-3936-49f5-ab02-50aea5e6755f" }, { "type": "image", "image_id": "57efc97c-b9b4-4cd5-b1e1-3539f5853835" }, { "type": "text", "text": "pg is awesome" } ] Now I want to join the image type of

问题 I have the following jsonb structure: {'this': '1', 'this_that': '0', 'this_and_that': '5'} How do I select rows that contain a LIKE operator? SELECT * FROM myjson WHERE j ? 'this_%' Returns 0 rows...was hoping it would match 'this_that' and 'this_and_that'. (Note: the characters following '_' will potentially vary greatly and therefore I am not able to do an exact match). 回答1: Your example should not work because there are not implicit cast between jsonb and text types. You can enforce

问题 I'm working with Rails 4.2 and Postgres 9.4 to try out the new JSONB data type. One of the JSONB columns in my database holds an array, and I want to be able to query for records where this array contains a certain value. I figured out how to do this using the new JSONB "question mark" ("contains") operator, as documented here: http://www.postgresql.org/docs/9.4/static/functions-json.html So in raw SQL I can get this to work as in this example: SELECT * FROM people WHERE roles ? '32486d83

问题 I have structure like this: user_id, a. a is of type jsonb and has the following structure: { b: [ {ids: [1,2,3,4]}, {ids: [2,3,4]}, {ids: [1,2,4]}, ... ] } How would I make an index that enabled me to find all users (user_id) that has a certain id in the ids list? 回答1: Is a GIN index what you want? It seems that you first need to organized the IDs into a form that is more tractable. I'm more familiar with Python than I am with the PostgreSQL ways of manipulating JSON, so I used PL/Python for

问题 I have structure like this: user_id, a. a is of type jsonb and has the following structure: { b: [ {ids: [1,2,3,4]}, {ids: [2,3,4]}, {ids: [1,2,4]}, ... ] } How would I make an index that enabled me to find all users (user_id) that has a certain id in the ids list? 回答1: Is a GIN index what you want? It seems that you first need to organized the IDs into a form that is more tractable. I'm more familiar with Python than I am with the PostgreSQL ways of manipulating JSON, so I used PL/Python for