Re: Table Partitioning

Interesting. I wonder what I am doing wrong. I will try and setup the database again and see if I can get it to work.

thank you for testing it out for me.

Richard

On May 21, 2013, at 1:06 PM, Raghavendra <raghavendra(dot)rao(at)enterprisedb(dot)com> wrote:

> On Tue, May 21, 2013 at 11:03 PM, Richard Onorato <richard_onorato(at)yahoo(dot)com> wrote:
> I am wanting to partition my data based on a mod of one of the bigint columns, but when I run my insert test all the data goes into the base table and not the partitions. Here is what the table looks like:
>
> CREATE table MyMappingTable ( id bigserial NOT NULL,
> c1 bigInt NOT NULL,
> c2 bigInt NOT NULL,
> c3 bigint NOT NULL,
> count bigint DEFAULT 1,
> createdTime timestamp with time zone default CURRENT_TIMESTAMP,
> CONSTRAINT MyMappingTable_index PRIMARY KEY (id) )
> with (OIDS=FALSE);
>
> CREATE TABLE MyMappingTableT1 (PRIMARY KEY (id), CHECK((c1 % 5) = 0)) INHERITS (MyMappingTable);
> CREATE TABLE MyMappingTableT2 (PRIMARY KEY (id), CHECK((c1 % 5) = 1)) INHERITS (MyMappingTable);
> CREATE TABLE MyMappingTableT3 (PRIMARY KEY (id), CHECK((c1 % 5) = 2)) INHERITS (MyMappingTable);
> CREATE TABLE MyMappingTableT4 (PRIMARY KEY (id), CHECK((c1 % 5) = 3)) INHERITS (MyMappingTable);
> CREATE TABLE MyMappingTableT5 (PRIMARY KEY (id), CHECK((c1 % 5) = 4)) INHERITS (MyMappingTable);
>
> Here is the trigger function that I added to the database:
>
> CREATE OR REPLACE FUNCTION my_mapping_table_insert_trigger()
> RETURNS trigger AS $$
> BEGIN
> IF ( (NEW.c1 % 5) = 0 ) THEN
> INSERT INTO MyMappingTableT1 VALUES (NEW.*);
> ELSIF ( (NEW.c1 % 5) = 1 ) THEN
> INSERT INTO MyMappingTableT2 VALUES (NEW.*);
> ELSIF ( (NEW.c1 % 5) = 2 ) THEN
> INSERT INTO MyMappingTableT3 VALUES (NEW.*);
> ELSIF ( (NEW.c1 % 5) = 3 ) THEN
> INSERT INTO MyMappingTableT4 VALUES (NEW.*);
> ELSIF ( (NEW.c1 % 5) = 4 ) THEN
> INSERT INTO MyMappingTableT5 VALUES (NEW.*);
> ELSE
> RAISE EXCEPTION 'c1 mod out of range. Something wrong with the my_mapping_table_insert_trigger() function!';
> END IF;
> RETURN NULL;
> END;
> $$
> LANGUAGE plpgsql;
>
> Here is the Trigger that I added to the table:
>
> CREATE TRIGGER insert_my_mapping_table_trigger
> BEFORE INSERT ON MyMappingTable
> FOR EACH ROW EXECUTE PROCEDURE my_mapping_table_insert_trigger();
>
> SET constraint_exclusion = ON;
>
> Regards,
>
> Richard
>
> I tried your test case, its working fine from my end and populating data properly to partition childs.
>
> insert into mymappingtable values (1,7,20,30,1,now());
> insert into mymappingtable values (2,6,20,30,1,now());
> insert into mymappingtable values (3,8,20,30,1,now());
> insert into mymappingtable values (4,9,20,30,1,now());
> insert into mymappingtable values (5,10,20,30,1,now());
>
> postgres=# \dt+ MyMappingTable*
> List of relations
> Schema | Name | Type | Owner | Size | Description
> --------+------------------+-------+----------+------------+-------------
> public | mymappingtable | table | postgres | 0 bytes |
> public | mymappingtablet1 | table | postgres | 8192 bytes |
> public | mymappingtablet2 | table | postgres | 8192 bytes |
> public | mymappingtablet3 | table | postgres | 8192 bytes |
> public | mymappingtablet4 | table | postgres | 8192 bytes |
> public | mymappingtablet5 | table | postgres | 8192 bytes |
>
> ---
> Regards,
> Raghavendra
> EnterpriseDB Corporation
> Blog: http://raghavt.blogspot.com/
>