postgresql

问题 Is there a way to get the JSON of the only modified fields? Now I use the following trigger but the entire line is printed in the changelog. Example tables: TABLE tbl_changelog ( tbl TEXT, op TEXT, new JSON, old JSON ); TABLE tbl_items ( f1 TEXT, f2 TEXT ); Trigger: CREATE OR REPLACE FUNCTION changelog_procedure() RETURNS trigger AS $$ BEGIN INSERT INTO tbl_changelog(tbl, op, new, old) VALUES (TG_TABLE_NAME, TG_OP, row_to_json(NEW), row_to_json(OLD)); RETURN NULL; END; $$ LANGUAGE plpgsql

问题 I'm trying to formulate a SQLAlchemy query that uses a CTE to build a table-like structure of an input list of tuples, and JOIN it with one of my tables (backend DB is Postgres). Conceptually, it would look like: WITH to_compare AS ( SELECT * FROM ( VALUES (1, 'flimflam'), (2, 'fimblefamble'), (3, 'pigglywiggly'), (4, 'beepboop') -- repeat for a couple dozen or hundred rows ) AS t (field1, field2) ) SELECT b.field1, b.field2, b.field3 FROM my_model b JOIN to_compare c ON (c.field1 = b.field1)

问题 I'm trying to formulate a SQLAlchemy query that uses a CTE to build a table-like structure of an input list of tuples, and JOIN it with one of my tables (backend DB is Postgres). Conceptually, it would look like: WITH to_compare AS ( SELECT * FROM ( VALUES (1, 'flimflam'), (2, 'fimblefamble'), (3, 'pigglywiggly'), (4, 'beepboop') -- repeat for a couple dozen or hundred rows ) AS t (field1, field2) ) SELECT b.field1, b.field2, b.field3 FROM my_model b JOIN to_compare c ON (c.field1 = b.field1)

问题 I'm trying to formulate a SQLAlchemy query that uses a CTE to build a table-like structure of an input list of tuples, and JOIN it with one of my tables (backend DB is Postgres). Conceptually, it would look like: WITH to_compare AS ( SELECT * FROM ( VALUES (1, 'flimflam'), (2, 'fimblefamble'), (3, 'pigglywiggly'), (4, 'beepboop') -- repeat for a couple dozen or hundred rows ) AS t (field1, field2) ) SELECT b.field1, b.field2, b.field3 FROM my_model b JOIN to_compare c ON (c.field1 = b.field1)

问题 Table Structure: create table example (a_id integer, b_id integer, c_id integer, flag integer); Partial Index: create unique index u_idx on example (a_id, b_id, c_id) where flag = 0; My Code for upsert: with a_ins_upd as ( Insert into example (a_id, b_id, c_id, flag) select x.a_id, x.b_id, x.c_id, x.flag from <input_tableType> x on conflict (a_id, b_id, c_id) where flag = 0 do update set a_id = excluded.a_id, b_id = excluded.b_id, c_id = excluded.c_id, flag = excluded.flag returning * )

问题 I want to obtain all rows for which, every interval of 48h in a given period of time, are satisfied the following conditions. Every time all of them are true, I put a flag with value 1 for it. This is what I did so far. DO $$ DECLARE i record; CHARTTIME TIMESTAMP; BEGIN FOR i IN SELECT * FROM schema.lab L JOIN schema.icu I ON L.ID = I.ID WHERE L.ITEM = 50912 AND L.CHARTTIME < I.INTIME AND L.CHARTTIME > (I.INTIME - INTERVAL '7 DAY') LOOP CHARTTIME := L.CHARTTIME; FOREACH CHARTTIME IN ARRAY

问题 I have the following data base which i am trying to make a mapping for it while the data base looks like the following id ----> serial (nextval('id_seq'::regclass)) fromDate_ts ---> timestamptz toDate_ts --> timestamptz creating_ts--> timestamptz so --> varchar re--> int4 while writing mapping like this: @Id @Column(name = "id", nullable = false, insertable = false) private Integer id; @Column(name = "fromDate_ts ") @Temporal(TemporalType.TIMESTAMP) private Date fromDate; @Column(name =

问题 I have the following data base which i am trying to make a mapping for it while the data base looks like the following id ----> serial (nextval('id_seq'::regclass)) fromDate_ts ---> timestamptz toDate_ts --> timestamptz creating_ts--> timestamptz so --> varchar re--> int4 while writing mapping like this: @Id @Column(name = "id", nullable = false, insertable = false) private Integer id; @Column(name = "fromDate_ts ") @Temporal(TemporalType.TIMESTAMP) private Date fromDate; @Column(name =

问题 I am trying the managed database service on DigitalOcean.com, having created a Postgres instance. Digital Ocean defaults to requiring remote connections be made with SSL (actually TLS) encryption. How does one configure a JDBC DataSource implementation for providing connections to such a database server? This Question is similar to Produce a DataSource object for Postgres JDBC, programmatically but adds the specific elements of SSL/TLS encryption and using a managed database remotely. 回答1:

问题 I am trying the managed database service on DigitalOcean.com, having created a Postgres instance. Digital Ocean defaults to requiring remote connections be made with SSL (actually TLS) encryption. How does one configure a JDBC DataSource implementation for providing connections to such a database server? This Question is similar to Produce a DataSource object for Postgres JDBC, programmatically but adds the specific elements of SSL/TLS encryption and using a managed database remotely. 回答1: