Postgres Update table id with sequence - postgresql

Question

I am trying to connect a sequence for user table to auto incremental value for id field.
I created following sequence,
CREATE SEQUENCE "USER_MGMT"."USER_SEQ"
INCREMENT 1
START 1000
MINVALUE 1000
MAXVALUE 99999999
CACHE 1;
ALTER SEQUENCE "USER_MGMT"."USER_SEQ"
OWNER TO postgres;
following is my table,
-- Table: "USER_MGMT"."USER"
-- DROP TABLE "USER_MGMT"."USER";
CREATE TABLE "USER_MGMT"."USER"
(
"USER_ID" bigint NOT NULL,
"FIRST_NAME" character varying(50) COLLATE pg_catalog."default" NOT NULL,
"LAST_NAME" character varying(50) COLLATE pg_catalog."default" NOT NULL,
"EMAIL_ID" character varying(100) COLLATE pg_catalog."default" NOT NULL,
"DESK_NUMBER" bigint,
"MOBILE_NUMBER" bigint,
"IS_ACTIVE" boolean NOT NULL DEFAULT true,
"CREATED_BY" character varying(100) COLLATE pg_catalog."default",
"MODIFIED_BY" character varying(100) COLLATE pg_catalog."default",
"DATE_CREATED" timestamp without time zone NOT NULL,
"DATE_MODIFIED" timestamp without time zone,
CONSTRAINT "USER_ID_PK" PRIMARY KEY ("USER_ID"),
CONSTRAINT "EMAIL_ID_UK" UNIQUE ("EMAIL_ID"),
CONSTRAINT "MOBILE_NUMBER_UK" UNIQUE ("MOBILE_NUMBER"),
CONSTRAINT "USER_ID_UK" UNIQUE ("USER_ID")
)
WITH (
OIDS = FALSE
)
TABLESPACE pg_default;
ALTER TABLE "USER_MGMT"."USER"
OWNER to postgres;
I want to connect this sequence to USER_ID column, so it will be auto incremented.
Table name and fields should be in upper case,
I am trying to execute the following query, but its not working
ALTER TABLE USER_MGMT.USER ALTER COLUMN USER_ID SET DEFAULT nextval('USER_MGMT.USER_SEQ');
It says the following error message in console.
ERROR: schema "user_mgmt" does not exist
********** Error **********

Answer 1

That is because when you use double quotes then you are creating case sensitive object identifier or to be more precise - this object will have identifier with exact case as given in the query during creation. If you do not double quote them, then they are converted to lower case.
So what you need is to either stop using double quotes, create objects in lower case or use double quotes in your alter query:
ALTER TABLE "USER_MGMT"."USER" ALTER COLUMN "USER_ID" SET DEFAULT nextval('"USER_MGMT"."USER_SEQ"');