postgresql-9.3

问题 According to their documentation the spatial objects can be of the following POINT(0 0) LINESTRING(0 0,1 1,1 2) POLYGON((0 0,4 0,4 4,0 4,0 0),(1 1, 2 1, 2 2, 1 2,1 1)) MULTIPOINT(0 0,1 2) MULTILINESTRING((0 0,1 1,1 2),(2 3,3 2,5 4)) MULTIPOLYGON(((0 0,4 0,4 4,0 4,0 0),(1 1,2 1,2 2,1 2,1 1)), ((-1 -1,-1 -2,-2 -2,-2 -1,-1 -1))) GEOMETRYCOLLECTION(POINT(2 3),LINESTRING(2 3,3 4)) However , there is no circle type, where I can just store a point and its radius. And have the same feature where I

问题 A web application can send to a function an array of arrays like [ [ [1,2], [3,4] ], [ [], [4,5,6] ] ] The outer array length is n > 0 . The middle arrays are of constant length, 2 in this example. And the inner arrays lengths are n >= 0 . I could string build it like this: with t(a, b) as ( values (1, 4), (2, 3), (1, 4), (7, 3), (7, 4) ) select distinct a, b from t where (a = any(array[1,2]) or array_length(array[1,2],1) is null) and (b = any(array[3,4]) or array_length(array[3,4],1) is null

问题 I've created a sql fiddle for this post: http://sqlfiddle.com/#!15/7b5d7/1/0 Question #1 Why does inserting a record with a daterange that has exclusive bounds actually store a range with an inclusive lower bound and an exclusive upper bound? Why doesn't pg store them both as inclusive bounds? Question #2 SELECT upper('[2016-06-19, 2016-06-21)'::daterange) returns 2016-06-21 . Note that [ signifies an inclusive lower bound and ) an exclusive upper bound. Shouldn't selecting the upper bound

问题 From the manual CREATE MATERIALIZED VIEW is similar to CREATE TABLE AS, except that it also remembers the query used to initialize the view, so that it can be refreshed later upon demand. As I understand refreshing a materialized view should have the same effect as re create view as . But it is not what happens here. Create a table with a single column drop table if exists t cascade; create table t (a int); insert into t (a) values (1); Create the materialized view create materialized view

问题 I have a table called evidence with a trigger which calls a stored procedure which basically does table partitioning by month. However I get an obscure error when I start inserting lots of rows under load: Npgsql.NpgsqlException: query string argument of EXECUTE is null Severity: ERROR Code: 22004 at Npgsql.NpgsqlState.<ProcessBackendResponses_Ver_3>d__a.MoveNext() in c:\C#Apps\github.npgsql.Npgsql.stock\src\Npgsql\NpgsqlState.cs:line890 at Npgsql.ForwardsOnlyDataReader.GetNextResponseObject(

问题 I've tried to create my Rails app with postgresql database, but when I started rails server , I got this error: fe_sendauth: no password supplied Here're my actions step by step: $ sudo apt-get install postgresql postgresql-contrib $ gem install pg $ rails new timetracker --database=postgresql --skip-unit-test My database.yml file looks like this: default: &default adapter: postgresql encoding: unicode pool: 5 host: localhost username: postgres password: development: <<: *default database:

问题 According the instructions here I have created two functions that use EXECUTE FORMAT and return the same table of (int,smallint) . Sample definitions: CREATE OR REPLACE FUNCTION function1(IN _tbl regclass, IN _tbl2 regclass, IN field1 integer) RETURNS TABLE(id integer, dist smallint) CREATE OR REPLACE FUNCTION function2(IN _tbl regclass, IN _tbl2 regclass, IN field1 integer) RETURNS TABLE(id integer, dist smallint) Both functions return the exact same number of rows. Sample result ( will be

问题 I change MySQL databese into postgreSQL in sequelize. But After migration I have issue with upper and lowercase first letter in Table or Model... Before my MySQL version was working properly but after migration I got error message: 500 SequelizeDatabaseError: relation "Users" does not exist My User model: module.exports = function(sequelize, Sequelize) { var User = sequelize.define("User", { // profile userlevel: Sequelize.STRING, restaurant: Sequelize.STRING, access: Sequelize.STRING,

问题 We convert time stamps to epoch, do some math on them and then convert them back to time stamps. All times in the database are TIMESTAMP WITHOUT TIME ZONE . Since the switch to summer time here in the UK times are off by one hour on one server but not on the other so I did a little test: SHOW SERVER_VERSION; SHOW TIMEZONE; SELECT extract(EPOCH FROM TIMESTAMP '1970-01-01'); On one server I get server_version ---------------- 9.1.15 (1 row) TimeZone ---------- GB (1 row) date_part ----------- 0

问题 I have scenario where i need to convert a json array into postgres int array and query it for the result. Below is my array ID DATA 1 {"bookIds" : [1,2,3,5], "storeIds": [2,3]} 2 {"bookIds" : [4,5,6,7], "storeIds": [1,3]} 3 {"bookIds" : [11,12,10,9], "storeIds": [4,3]} I want convert booksId array into int array and later query it. Is it possible in postgres 9.3? I know 9.4 + provides much more JSON support but i can't update my db at the moment. Below query gives me error Select data::json->