PostgreSQL Partition Table creation

PostgreSQL, there are no partition table creation commands that are created by creating rules such as inheritance tables and constraints, and the steps are tedious and cumbersome, encapsulating a method. Easy to create partitioned tables:

CREATE TABLE "ODL"."User_action_fatt0"("date_id" Numeric(8,0),"chnl_id" Numeric(2,0),"User_acct_type" Numeric(2,0),"user_id" Numeric( +,0),"cont_id" Numeric( +,0),"act_id" Numeric(5,0),"Act_value" Numeric)

Create a partition function

CREATE FUNCTION"Public"."Partition_generate_numeric"(in tablename varchar, in start_date varchar, in end_date varchar, in ptype varchar, in pcolumn varchar) RETURNS"Text"As $BODY $ImportReImportDatetime def udf_date_add(lstr,day):s = Datetime.datetime.strptime (Lstr,"%y%m%d") s = S+datetime.timedelta (Days=day)returnSTR (s). Replace ('-',"')[0:8] Startdate=start_date enddate=end_dateifPType not inch(' Mon ',' Day '):return "Error:\tptype only support ' mon ' or ' Day '"    ifptype==' Day ':if  notRe.match (' [0-9]{8} ', StartDate):return "Error:\tstartdate need 20130101 format"        if  notRe.match (' [0-9]{8} ', EndDate):return "Error:\tenddate need 20130101 format"    Try: table_name = Tablename.lower (). Split ('. ')[1] Table_schema = Tablename.lower (). Split ('. ')[0]except(Indexerror):return ' error:\ttablename need ' tableschema.table_name ' format '      while True:#1) Create the partition tablesql ="" " Create Table " ""+table_schema+"""."""+table_name+"""_"""+startdate+"" (Check ( "" ")+ Pcolumn +"" " >= ( " "")+ StartDate +"" :: Numeric) and " " "+ Pcolumn +"" < ( "" "+ Udf_date_add (StartDate,1) +"" " :: Numeric))) INHERITS ( "" "+table_schema+"""."""+table_name+""")"""        #plpy. info (SQL)        Try: Plpy.execute (SQL)except:Pass        #2) Create the index for the partition tablesql ="" " Create INDEX" ""+table_name+"""_"""+startdate+"""_"""+pcolumn+"" On " " "+table_schema+"""."""+table_name+"""_"""+startdate+""" ("""+pcolumn+""")"""        #plpy. info (SQL)        Try: Plpy.execute (SQL)except:PassStartdate=udf_date_add (StartDate,1)ifStartdate>enddate: Break     #2.0) Create the error tablesql ="" " Create Table " ""+table_schema+"""."""+table_name+"" " _error_ " ""+pcolumn+"" As select * from " " "+table_schema+"""."""+table_name+"" " Limit 0 " ""    Try: Plpy.execute (SQL)except:Pass    #3) Create the trigger for the partition tabletrigger_tmp=""Startdate=start_date while True: trigger_tmp=trigger_tmp+"" " elsif (NEW. " "")+pcolumn+"" " >= ( " "")+startdate+"" :: Numeric) and NEW. "" "+pcolumn+"" < ( "" "+udf_date_add (StartDate,1)+"" " :: Numeric)) Then INSERT into "" "+table_schema+"""."""+table_name+"""_"""+startdate+"" " VALUES (new.*); """Startdate=udf_date_add (StartDate,1)ifStartdate>udf_date_add (EndDate,365): Breaktrigger_tmp=trigger_tmp+"" else INSERT into " " "+table_schema+"""."""+table_name+"" " _error_ " ""+pcolumn+"" " VALUES (new.*);                    End If; """trigger_tmp=trigger_tmp[3:] sql ="" CREATE OR REPLACE FUNCTION " " "+table_schema+"""."""+table_name+"" " _insert_trigger () RETURNS trigger as $PROC $ BEGIN " ""+trigger_tmp+"" " RETURN NULL;          END; $PROC $ LANGUAGE plpgsql " " "    #plpy. info (SQL)Plpy.execute (SQL)#4) Create the Insert triggersql ="" " CREATE TRIGGER insert_ " ""+table_name+"" " _trigger before INSERT on" "+table_schema+"""."""+table_name+"" For each ROW EXECUTE PROCEDURE ""+table_schema+"""."""+table_name+"" " _insert_trigger () " ""    #plpy. info (SQL)    Try: Plpy.execute (SQL)except:Pass    return "Success"$BODY $ LANGUAGE Plpythonu Cost -Called on NULL INPUT SECURITY INVOKER VOLATILE; ALTER FUNCTION"Public"."Partition_generate_numeric"(in tablename varchar, in start_date varchar, in end_date varchar, in ptype varchar, in pcolumn varchar) OWNER to"Brecom";

PostgreSQL Partition Table creation