ProHoster > Блог > Isakoso > Ayẹyẹ Idunnu tabi awọn ila meji ti awọn iranti nipa gbigba lati mọ ipin ni PostgreSQL10

Ayẹyẹ Idunnu tabi awọn ila meji ti awọn iranti nipa gbigba lati mọ ipin ni PostgreSQL10

Ọrọ Iṣaaju tabi bawo ni imọran ti apakan ṣe waye

Itan naa bẹrẹ nibi: Ṣe o ranti bi gbogbo rẹ ṣe bẹrẹ. Ohun gbogbo wà fun igba akọkọ ati lẹẹkansi. Lẹhin ti gbogbo awọn orisun fun imudara ibeere naa, ni akoko yẹn, ti rẹwẹsi, ibeere naa dide - kini atẹle? Eyi ni bii imọran ipinpin ṣe dide.

Ayẹyẹ Idunnu tabi awọn ila meji ti awọn iranti nipa gbigba lati mọ ipin ni PostgreSQL10

Digression lyrical:
Ni deede 'ni akoko yẹn', nitori bi o ti wa ni jade, nibẹ wà untapped iṣapeye ifiṣura... e dupe asmm ati Habru!

Nitorinaa, bawo ni o ṣe le mu inu alabara dun, ati ni akoko kanna mu awọn ọgbọn tirẹ dara?

Lati simplify ohun gbogbo bi o ti ṣee, lẹhinna awọn ọna meji nikan lo wa lati ṣe ilọsiwaju ohunkan ni iṣẹ ṣiṣe ti database:
1) Ọna ti o gbooro - a mu awọn ohun elo pọ si, yi iṣeto pada;
2) Ona aladanla - iṣapeye ibeere

Niwọn igba ti Mo tun sọ, ni akoko yẹn ko han kini ohun miiran lati yipada ninu ibeere lati yara, ọna ti yan - tabili design ayipada.

Nitorina, ibeere akọkọ waye: kini ati bawo ni a ṣe le yipada?

Awọn ipo ibẹrẹ

Ni akọkọ, ERD yii wa (ti o han ni ọna ti o rọrun ni majemu):
Ayẹyẹ Idunnu tabi awọn ila meji ti awọn iranti nipa gbigba lati mọ ipin ni PostgreSQL10
Awọn ẹya pataki:

  1. ọpọlọpọ-si-ọpọlọpọ awọn ibatan
  2. tabili tẹlẹ ni bọtini ipin ti o pọju

Ibere ​​atilẹba:

SELECT
            p."PARAMETER_ID" as  parameter_id,
            pc."PC_NAME" AS pc_name,
            pc."CUSTOMER_PARTNUMBER" AS customer_partnumber,
            w."LASERMARK" AS lasermark,
            w."LOTID" AS lotid,
            w."REPORTED_VALUE" AS reported_value,
            w."LOWER_SPEC_LIMIT" AS lower_spec_limit,
            w."UPPER_SPEC_LIMIT" AS upper_spec_limit,
            p."TYPE_CALCUL" AS type_calcul,
            s."SHIPMENT_NAME" AS shipment_name,
            s."SHIPMENT_DATE" AS shipment_date,
            extract(year from s."SHIPMENT_DATE") AS year,
            extract(month from s."SHIPMENT_DATE") as month,
            s."REPORT_NAME" AS report_name,
            p."SPARAM_NAME" AS SPARAM_name,
            p."CUSTOMERPARAM_NAME" AS customerparam_name
        FROM data w INNER JOIN shipment s ON s."SHIPMENT_ID" = w."SHIPMENT_ID"
             INNER JOIN parameters p ON p."PARAMETER_ID" = w."PARAMETER_ID"
             INNER JOIN shipment_pc sp ON s."SHIPMENT_ID" = sp."SHIPMENT_ID"
             INNER JOIN pc pc ON pc."PC_ID" = sp."PC_ID"
             INNER JOIN ( SELECT w2."LASERMARK" , MAX(s2."SHIPMENT_DATE") AS "SHIPMENT_DATE"
                          FROM shipment s2 INNER JOIN data w2 ON s2."SHIPMENT_ID" = w2."SHIPMENT_ID" 
                          GROUP BY w2."LASERMARK"
                         ) md ON md."SHIPMENT_DATE" = s."SHIPMENT_DATE" AND md."LASERMARK" = w."LASERMARK"
        WHERE 
             s."SHIPMENT_DATE" >= '2018-07-01' AND s."SHIPMENT_DATE" <= '2018-09-30' ;

Awọn abajade ti ipaniyan lori aaye data idanwo:
iye owo : 502 997.55
Akoko ipaniyan: Awọn aaya 505.

Kini a ri? Ibeere deede, da lori bibẹ akoko kan.
Jẹ ká ṣe awọn alinisoro mogbonwa arosinu: ti o ba ti wa nibẹ ni a ayẹwo ti a akoko bibẹ, yoo o ran wa? Iyẹn tọ - ipin.

Kini si apakan?

Ni iwo akọkọ, yiyan jẹ kedere - ipin asọye ti tabili “ifiranṣẹ” ni lilo bọtini “SHIPMENT_DATE” (n fo ju jina siwaju - ni ipari o wa ni aṣiṣe diẹ ninu iṣelọpọ).

Bawo ni lati pin?

Ibeere yii tun ko nira pupọ. O da, ni PostgreSQL 10, ẹrọ ipinpin eniyan wa bayi.
Nitorina:

  1. Ṣafipamọ idalẹnu tabili orisun - pg_dump orisun_tabili
  2. Pa tabili atilẹba rẹ - ju tabili source_table
  3. Ṣẹda tabili obi kan pẹlu ipin ipin - ṣẹda tabili source_table
  4. Ṣẹda awọn apakan - ṣẹda tabili source_table, ṣẹda atọka
  5. Ṣe agbewọle idalẹnu ti a ṣẹda ni igbesẹ 1 - pg_pada

Awọn iwe afọwọkọ fun ipin

Fun ayedero ati irọrun, awọn igbesẹ 2,3,4 ti ni idapo sinu iwe afọwọkọ kan.

Nitorina:
Ṣafipamọ idalẹnu tabili orisun

pg_dump postgres --file=/dump/shipment.dmp --format=c --table=shipment --verbose > /dump/shipment.log 2>&1

Pa tabili orisun rẹ + Ṣẹda tabili obi kan pẹlu ipin ipin + Ṣẹda awọn ipin

--create_partition_shipment.sql
do language plpgsql $$
declare 
rec_shipment_date RECORD ;
partition_name varchar;
index_name varchar;
current_year varchar ;
current_month varchar ;
begin_year varchar ;
begin_month varchar ;
next_year varchar ;
next_month varchar ;
first_flag boolean ;
i integer ;
begin
  RAISE NOTICE 'CREATE TEMPORARY TABLE FOR SHIPMENT_DATE';
  CREATE TEMP TABLE tmp_shipment_date as select distinct "SHIPMENT_DATE" from shipment order by "SHIPMENT_DATE" ;

  RAISE NOTICE 'DROP TABLE shipment';
  drop table shipment cascade ;
  
  CREATE TABLE public.shipment
  (
    "SHIPMENT_ID" integer NOT NULL DEFAULT nextval('shipment_shipment_id_seq'::regclass),
    "SHIPMENT_NAME" character varying(30) COLLATE pg_catalog."default",
    "SHIPMENT_DATE" timestamp without time zone,
    "REPORT_NAME" character varying(40) COLLATE pg_catalog."default"
  )
  PARTITION BY RANGE ("SHIPMENT_DATE")
  WITH (
      OIDS = FALSE
  )
  TABLESPACE pg_default;

  RAISE NOTICE 'CREATE PARTITIONS FOR TABLE shipment';

  current_year:='0';
  current_month:='0';

  begin_year := '0' ;
  begin_month := '0'  ;
  next_year := '0' ;
  next_month := '0'  ;

  FOR rec_shipment_date IN SELECT * FROM tmp_shipment_date LOOP
      
      RAISE NOTICE 'SHIPMENT_DATE=%',rec_shipment_date."SHIPMENT_DATE";
      
      current_year := date_part('year' ,rec_shipment_date."SHIPMENT_DATE");
      current_month := date_part('month' ,rec_shipment_date."SHIPMENT_DATE") ; 

      IF to_number(current_month,'99') < 10 THEN
        current_month := '0'||current_month ; 
      END IF ;

      --Init borders
      IF   begin_year = '0' THEN
       first_flag := true ; --first time flag
       begin_year := current_year ;
       begin_month := current_month ;   
   
        IF current_month = '12' THEN
          next_year := date_part('year' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 year') ;
        ELSE
          next_year := current_year ;
        END IF;
     
       next_month := date_part('month' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 month') ;

      END IF;

      -- Check current date into borders NOT for First time
      IF to_date( current_year||'.'||current_month, 'YYYY.MM') >= to_date( begin_year||'.'||begin_month, 'YYYY.MM') AND 
         to_date( current_year||'.'||current_month, 'YYYY.MM') < to_date( next_year||'.'||next_month, 'YYYY.MM') AND 
         NOT first_flag 
      THEN
         CONTINUE ; 
      ELSE
       --NEW borders only for second and after time 
       begin_year := current_year ;
       begin_month := current_month ;   
   
        IF current_month = '12' THEN
          next_year := date_part('year' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 year') ;
        ELSE
          next_year := current_year ;
        END IF;
     
       next_month := date_part('month' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 month') ;

      END IF;      

      partition_name := 'shipment_shipment_date_'||begin_year||'-'||begin_month||'-01-'|| next_year||'-'||next_month||'-01'  ;
 
     EXECUTE format('CREATE TABLE ' || quote_ident(partition_name) || ' PARTITION OF shipment FOR VALUES FROM ( %L ) TO ( %L )  ' , current_year||'-'||current_month||'-01' , next_year||'-'||next_month||'-01'  ) ; 

      index_name := partition_name||'_shipment_id_idx';
      RAISE NOTICE 'INDEX NAME =%',index_name;
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_ID") TABLESPACE pg_default ' ) ; 

      --Drop first time flag
      first_flag := false ;
   
  END LOOP;

end
$$;

Nkowọle idalẹnu

pg_restore -d postgres --data-only --format=c --table=shipment --verbose  shipment.dmp > /tmp/data_dump/shipment_restore.log 2>&1

Ṣiṣayẹwo awọn abajade ipin

Kí ni a ní gẹ́gẹ́ bí ìyọrísí rẹ̀? Ọrọ kikun ti eto ipaniyan jẹ nla ati alaidun, nitorinaa o ṣee ṣe lati fi opin si ararẹ si awọn nọmba ipari.

Jẹ

Iye owo: 502 997.55
Àkókò ìmúṣẹ: 505 aaya.

Ti di

Iye owo: 77 872.36
Àkókò ìmúṣẹ: 79 aaya.

Oyimbo kan ti o dara esi. Idinku iye owo ati akoko ipaniyan. Nitorinaa, lilo ipin yoo fun ipa ti a nireti ati, ni gbogbogbo, ko si awọn iyanilẹnu.

Mu inu alabara dun

Awọn abajade idanwo ni a gbekalẹ si alabara fun atunyẹwo. Ati lẹhin atunyẹwo rẹ, wọn fun wọn ni idajọ airotẹlẹ diẹ: “Nla, pin tabili “data” naa.”

Bẹẹni, ṣugbọn a ṣe ayẹwo tabili “ikowo” ti o yatọ patapata; tabili “data” ko ni aaye “SHIPMENT_DATE”.

Ko si iṣoro, ṣafikun, yipada. Ohun akọkọ ni pe alabara ni itẹlọrun pẹlu abajade; awọn alaye imuse ko ṣe pataki ni pataki.

Pipin tabili akọkọ "data"

Ni gbogbogbo, ko si awọn iṣoro kan pato ti o dide. Botilẹjẹpe, algorithm ipin, dajudaju, ti yipada diẹ.

Ṣafikun iwe “SHIPMENT_DATA” si tabili “data”.

psql -h хост -U база -d юзер
=> ALTER TABLE data ADD COLUMN "SHIPMENT_DATE" timestamp without time zone ;

Fọwọsi awọn iye ti iwe “SHIPMENT_DATA” ninu tabili “data” pẹlu awọn iye ti iwe ti orukọ kanna lati tabili “firanṣẹ”

-----------------------------
--update_data.sql
--updating for altered table "data" to values of "shipment_data" from the table "shipment"
--version 1.0
do language plpgsql $$
declare 
rec_shipment_data RECORD ;
shipment_date timestamp without time zone ; 
row_count integer ;
total_rows integer ;
begin

  select count(*) into total_rows from shipment ; 
  RAISE NOTICE 'Total %',total_rows;
  row_count:= 0 ;

  FOR rec_shipment_data IN SELECT * FROM shipment LOOP

   update data set "SHIPMENT_DATE" = rec_shipment_data."SHIPMENT_DATE" where "SHIPMENT_ID" = rec_shipment_data."SHIPMENT_ID";
   
   row_count:=  row_count +1 ;
   RAISE NOTICE 'row count = % , from %',row_count,total_rows;
  END LOOP;

end
$$;

Ṣafipamọ idalẹnu tabili “data” kan

pg_dump postgres --file=/dump/data.dmp --format=c --table=data --verbose > /dump/data.log 2>&1</source

Tun tabili ti a pin si “data”

--create_partition_data.sql
--create partitions for the table "wafer data" by range column "shipment_data" with one month duration
--version 1.0
do language plpgsql $$
declare 
rec_shipment_date RECORD ;
partition_name varchar;
index_name varchar;
current_year varchar ;
current_month varchar ;
begin_year varchar ;
begin_month varchar ;
next_year varchar ;
next_month varchar ;
first_flag boolean ;
i integer ;

begin

  RAISE NOTICE 'CREATE TEMPORARY TABLE FOR SHIPMENT_DATE';
  CREATE TEMP TABLE tmp_shipment_date as select distinct "SHIPMENT_DATE" from shipment order by "SHIPMENT_DATE" ;


  RAISE NOTICE 'DROP TABLE data';
  drop table data cascade ;


  RAISE NOTICE 'CREATE PARTITIONED TABLE data';
  
  CREATE TABLE public.data
  (
    "RUN_ID" integer,
    "LASERMARK" character varying(20) COLLATE pg_catalog."default" NOT NULL,
    "LOTID" character varying(80) COLLATE pg_catalog."default",
    "SHIPMENT_ID" integer NOT NULL,
    "PARAMETER_ID" integer NOT NULL,
    "INTERNAL_VALUE" character varying(75) COLLATE pg_catalog."default",
    "REPORTED_VALUE" character varying(75) COLLATE pg_catalog."default",
    "LOWER_SPEC_LIMIT" numeric,
    "UPPER_SPEC_LIMIT" numeric , 
    "SHIPMENT_DATE" timestamp without time zone
  )
  PARTITION BY RANGE ("SHIPMENT_DATE")
  WITH (
    OIDS = FALSE
  )
  TABLESPACE pg_default ;


  RAISE NOTICE 'CREATE PARTITIONS FOR TABLE data';

  current_year:='0';
  current_month:='0';

  begin_year := '0' ;
  begin_month := '0'  ;
  next_year := '0' ;
  next_month := '0'  ;
  i := 1;

  FOR rec_shipment_date IN SELECT * FROM tmp_shipment_date LOOP
      
      RAISE NOTICE 'SHIPMENT_DATE=%',rec_shipment_date."SHIPMENT_DATE";
      
      current_year := date_part('year' ,rec_shipment_date."SHIPMENT_DATE");
      current_month := date_part('month' ,rec_shipment_date."SHIPMENT_DATE") ; 

      --Init borders
      IF   begin_year = '0' THEN
       RAISE NOTICE '***Init borders';
       first_flag := true ; --first time flag
       begin_year := current_year ;
       begin_month := current_month ;   
   
        IF current_month = '12' THEN
          next_year := date_part('year' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 year') ;
        ELSE
          next_year := current_year ;
        END IF;
     
       next_month := date_part('month' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 month') ;

      END IF;

--      RAISE NOTICE 'current_year=% , current_month=% ',current_year,current_month;
--      RAISE NOTICE 'begin_year=% , begin_month=% ',begin_year,begin_month;
--      RAISE NOTICE 'next_year=% , next_month=% ',next_year,next_month;

      -- Check current date into borders NOT for First time

      RAISE NOTICE 'Current data = %',to_char( to_date( current_year||'.'||current_month, 'YYYY.MM'), 'YYYY.MM');
      RAISE NOTICE 'Begin data = %',to_char( to_date( begin_year||'.'||begin_month, 'YYYY.MM'), 'YYYY.MM');
      RAISE NOTICE 'Next data = %',to_char( to_date( next_year||'.'||next_month, 'YYYY.MM'), 'YYYY.MM');

      IF to_date( current_year||'.'||current_month, 'YYYY.MM') >= to_date( begin_year||'.'||begin_month, 'YYYY.MM') AND 
         to_date( current_year||'.'||current_month, 'YYYY.MM') < to_date( next_year||'.'||next_month, 'YYYY.MM') AND 
         NOT first_flag 
      THEN
         RAISE NOTICE '***CONTINUE';
         CONTINUE ; 
      ELSE
       --NEW borders only for second and after time 
       RAISE NOTICE '***NEW BORDERS';
       begin_year := current_year ;
       begin_month := current_month ;   
   
        IF current_month = '12' THEN
          next_year := date_part('year' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 year') ;
        ELSE
          next_year := current_year ;
        END IF;
     
       next_month := date_part('month' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 month') ;


      END IF;      

      IF to_number(current_month,'99') < 10 THEN
        current_month := '0'||current_month ; 
      END IF ;

      IF to_number(begin_month,'99') < 10 THEN
        begin_month := '0'||begin_month ; 
      END IF ;

      IF to_number(next_month,'99') < 10 THEN
        next_month := '0'||next_month ; 
      END IF ;

      RAISE NOTICE 'current_year=% , current_month=% ',current_year,current_month;
      RAISE NOTICE 'begin_year=% , begin_month=% ',begin_year,begin_month;
      RAISE NOTICE 'next_year=% , next_month=% ',next_year,next_month;

      partition_name := 'data_'||begin_year||begin_month||'01_'||next_year||next_month||'01'  ;

      RAISE NOTICE 'PARTITION NUMBER % , TABLE NAME =%',i , partition_name;
      
      EXECUTE format('CREATE TABLE ' || quote_ident(partition_name) || ' PARTITION OF data FOR VALUES FROM ( %L ) TO ( %L )  ' , begin_year||'-'||begin_month||'-01' , next_year||'-'||next_month||'-01'  ) ; 

      index_name := partition_name||'_shipment_id_parameter_id_idx';
      RAISE NOTICE 'INDEX NAME =%',index_name;
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_ID", "PARAMETER_ID") TABLESPACE pg_default ' ) ; 

      index_name := partition_name||'_lasermark_idx';
      RAISE NOTICE 'INDEX NAME =%',index_name;
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("LASERMARK" COLLATE pg_catalog."default") TABLESPACE pg_default ' ) ; 

      index_name := partition_name||'_shipment_id_idx';
      RAISE NOTICE 'INDEX NAME =%',index_name;
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_ID") TABLESPACE pg_default ' ) ; 

      index_name := partition_name||'_parameter_id_idx';
      RAISE NOTICE 'INDEX NAME =%',index_name;
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("PARAMETER_ID") TABLESPACE pg_default ' ) ; 

      index_name := partition_name||'_shipment_date_idx';
      RAISE NOTICE 'INDEX NAME =%',index_name;
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_DATE") TABLESPACE pg_default ' ) ; 

      --Drop first time flag
      first_flag := false ;

  END LOOP;
end
$$;

Kojọpọ idalẹnu ti a ṣẹda ni igbesẹ 3.

pg_restore -h хост -юзер -d база --data-only --format=c --table=data --verbose  data.dmp > data_restore.log 2>&1

Ṣẹda a lọtọ apakan fun atijọ data

---------------------------------------------------
--create_partition_for_old_dates.sql
--create partitions for keeping old dates 
--version 1.0
do language plpgsql $$
declare 
rec_shipment_date RECORD ;
partition_name varchar;
index_name varchar;

begin

      SELECT min("SHIPMENT_DATE") AS min_date INTO rec_shipment_date from data ;

      RAISE NOTICE 'Old date is %',rec_shipment_date.min_date ;

      partition_name := 'data_old_dates'  ;

      RAISE NOTICE 'PARTITION NAME IS %',partition_name;

      EXECUTE format('CREATE TABLE ' || quote_ident(partition_name) || ' PARTITION OF data FOR VALUES FROM ( %L ) TO ( %L )  ' , '1900-01-01' , 
              to_char( rec_shipment_date.min_date,'YYYY')||'-'||to_char(rec_shipment_date.min_date,'MM')||'-01'  ) ; 

      index_name := partition_name||'_shipment_id_parameter_id_idx';
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_ID", "PARAMETER_ID") TABLESPACE pg_default ' ) ; 

      index_name := partition_name||'_lasermark_idx';
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("LASERMARK" COLLATE pg_catalog."default") TABLESPACE pg_default ' ) ; 

      index_name := partition_name||'_shipment_id_idx';
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_ID") TABLESPACE pg_default ' ) ; 

      index_name := partition_name||'_parameter_id_idx';
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("PARAMETER_ID") TABLESPACE pg_default ' ) ; 

      index_name := partition_name||'_shipment_date_idx';
      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_DATE") TABLESPACE pg_default ' ) ; 

end
$$;

Awọn abajade ipari:

Jẹ
Iye owo: 502 997.55
Akoko ipaniyan: Awọn aaya 505.

Ti di
Iye owo: 68 533.70
Àkókò ìmúṣẹ: 69 aaya

yẹ, oyimbo yẹ. Ati pe ni ọna ti a ṣakoso lati ṣakoso diẹ sii tabi kere si ilana ti ipin ni PostgreSQL 10 - abajade to dara julọ.

Lirical digression

Ṣe o ṣee ṣe lati ṣe paapaa dara julọ - BẸẸNI, O LE!Lati ṣe eyi o nilo lati lo Iwo TITUN.
Ṣẹda wiwo LASERMARK_VIEW

CREATE MATERIALIZED VIEW LASERMARK_VIEW 
AS
SELECT w."LASERMARK" , MAX(s."SHIPMENT_DATE") AS "SHIPMENT_DATE"
FROM shipment s INNER JOIN data w ON s."SHIPMENT_ID" = w."SHIPMENT_ID" 
GROUP BY w."LASERMARK" ;

CREATE INDEX lasermark_vw_shipment_date_ind on lasermark_view USING btree ("SHIPMENT_DATE") TABLESPACE pg_default;
analyze lasermark_view ;

Lekan si a tun kọ ibeere naa:
Ibeere nipa lilo wiwo ohun elo

SELECT
            p."PARAMETER_ID" as  parameter_id,
            pc."PC_NAME" AS pc_name,
            pc."CUSTOMER_PARTNUMBER" AS customer_partnumber,
            w."LASERMARK" AS lasermark,
            w."LOTID" AS lotid,
            w."REPORTED_VALUE" AS reported_value,
            w."LOWER_SPEC_LIMIT" AS lower_spec_limit,
            w."UPPER_SPEC_LIMIT" AS upper_spec_limit,
            p."TYPE_CALCUL" AS type_calcul,
            s."SHIPMENT_NAME" AS shipment_name,
            s."SHIPMENT_DATE" AS shipment_date,
            extract(year from s."SHIPMENT_DATE") AS year,
            extract(month from s."SHIPMENT_DATE") as month,
            s."REPORT_NAME" AS report_name,
            p."STC_NAME" AS STC_name,
            p."CUSTOMERPARAM_NAME" AS customerparam_name
        FROM data w INNER JOIN shipment s ON s."SHIPMENT_ID" = w."SHIPMENT_ID"
             INNER JOIN parameters p ON p."PARAMETER_ID" = w."PARAMETER_ID"
             INNER JOIN shipment_pc sp ON s."SHIPMENT_ID" = sp."SHIPMENT_ID"
             INNER JOIN pc pc ON pc."PC_ID" = sp."PC_ID"
             INNER JOIN LASERMARK_VIEW md ON md."SHIPMENT_DATE" = s."SHIPMENT_DATE" AND md."LASERMARK" = w."LASERMARK"
        WHERE 
              s."SHIPMENT_DATE" >= '2018-07-01' AND s."SHIPMENT_DATE" <= '2018-09-30';

Ati pe a gba abajade miiran:
Jẹ
Iye owo: 502 997.55
Akoko ipaniyan: 505 aaya

Ti di
Iye owo: 42 481.16
Àkókò ìmúṣẹ: 43 aaya.

Bí ó tilẹ̀ jẹ́ pé, ní ti tòótọ́, irú àbájáde tí ń ṣèlérí bẹ́ẹ̀ jẹ́ ẹ̀tàn; àwọn èrò-ìmọ̀lára níláti tutù. Nitorinaa akoko lapapọ lati gba data kii yoo ṣe iranlọwọ pupọ. Sugbon bi ohun ṣàdánwò o jẹ ohun awon.

Lootọ, bi o ti wa ni jade, o ṣeun lẹẹkansi asmm ati Habru!- Ibeere naa le ni ilọsiwaju siwaju sii.

Lẹhin Ọrọ

Nitorinaa, alabara ni itẹlọrun. ATI nilo lo anfani ti ipo naa.

Iṣẹ tuntun: Kini o le wa pẹlu lati jinlẹ ati faagun?

Ati lẹhinna Mo ranti - eniyan, a ko ni abojuto ti awọn apoti isura data PostgreSQL wa.

Ọwọ lori ọkan, ibojuwo tun wa ni irisi Cloud Watch lori AWS. Ṣugbọn kini anfani ti ibojuwo yii fun DBA? Ni gbogbogbo, Oba ko si.

Ti o ba ni aye lati ṣe nkan ti o wulo ati ti o nifẹ fun ararẹ, iwọ ko le lo anfani yii…
FUN

Ayẹyẹ Idunnu tabi awọn ila meji ti awọn iranti nipa gbigba lati mọ ipin ni PostgreSQL10

Eyi ni bii a ṣe wa si apakan ti o nifẹ julọ:

Oṣu kejila ọjọ 3, ọdun 2018.
Ṣiṣe ipinnu lati bẹrẹ iwadii sinu awọn agbara ti o wa fun mimojuto iṣẹ ṣiṣe ti awọn ibeere PostgreSQL.

Ṣugbọn iyẹn jẹ itan ti o yatọ patapata.

A tun ma a se ni ojo iwaju…

orisun: www.habr.com

Fi ọrọìwòye kun