Postgresql 约束排除

Question

I have a huge table named audittrailreference so I partitioned it on the basis of date (1 table for a day).

The table has two date fields (intime & outtime)

for any row either of them could be null but not both or it might be possible that both of them may carry date.

Now I need to put the constraint exclusion to increase the performance of my queries.

my table structure is as follows:

CREATE TABLE myschema.auditrtailreference
(
    event smallint,
    innodeid character varying(80),
    innodename character varying(80),
    sourceid character varying(300),
    intime timestamp without time zone,
    outnodeid character varying(80),
    outnodename character varying(80),
    destinationid character varying(300),
    outtime timestamp without time zone,
    bytes integer,
    cdrs integer,
    noofsubfilesinfile integer,
    recordsequencenumberlist character varying(1000),
    partial_cdrs integer,
    duplicate_cdrs integer,
    discarded_cdrs integer,
    created_cdrs integer,
    corrupted_cdrs integer,
    created_files integer,
    duplicate_files integer,
    corrupted_files integer,
    partial_files integer,
    discarded_files integer,
    empty_files integer
)
WITH (
    OIDS=FALSE
);
ALTER TABLE myschema.auditrtailreference
    OWNER TO erix;

-- Trigger: auditrtailreference_trigger on myschema.auditrtailreference

-- DROP TRIGGER auditrtailreference_trigger ON myschema.auditrtailreference;

CREATE TRIGGER auditrtailreference_trigger
    BEFORE INSERT
    ON myschema.auditrtailreference
    FOR EACH ROW
    EXECUTE PROCEDURE myschema.auditrtailreference_partition_function();

Answer 1

I have done it on my own brothers

Thanks to all for your time

CONSTRAINT "auditrtailreference_2014-10-02_intime_check" CHECK (intime >= '2014-10-02 00:00:00'::timestamp without time zone AND intime < '2014-10-03 00:00:00'::timestamp without time zone OR intime IS NULL),
  CONSTRAINT "auditrtailreference_2014-10-02_outtime_check" CHECK (outtime >= '2014-10-02 00:00:00'::timestamp without time zone AND outtime < '2014-10-03 00:00:00'::timestamp without time zone OR outtime IS NULL)