ProHoster > Blog > Tsamaiso > Mokete o Thabileng kapa mela e 'maloa ea mehopolo mabapi le ho tseba karohano ho PostgreSQL10

Mokete o Thabileng kapa mela e 'maloa ea mehopolo mabapi le ho tseba karohano ho PostgreSQL10

Selelekela kapa hore na mohopolo oa ho arola o hlahile joang

Pale e qala mona: Na u sa hopola hore na tsohle li qalile joang. Ntho e 'ngoe le e 'ngoe e ne e le lekhetlo la pele le hape. Ka mor'a hore hoo e batlang e le lisebelisoa tsohle tsa ho ntlafatsa kopo, ka nako eo, li ne li felile, potso e ile ea hlaha - ho latela eng? Ke kamoo mohopolo oa ho arola o ileng oa hlaha.

Mokete o Thabileng kapa mela e 'maloa ea mehopolo mabapi le ho tseba karohano ho PostgreSQL10

Phallo ea mantsoe:
Hantle-ntle 'ka nako eo', hobane joalo ka ha ho ile ha fumaneha, ho ne ho e-na le mehloli ea optimization e sa sebelisoang... kea leboha asmm le Habru!

Kahoo, u ka etsa hore moreki a thabe joang hape, 'me ka nako e ts'oanang u ntlafatse tsebo ea hau?

Ho nolofatsa tsohle ka hohle kamoo ho ka khonehang, joale ho na le mekhoa e 'meli feela ea ho ntlafatsa ntho e itseng ts'ebetsong ea database:
1) Tsela e pharaletseng - re eketsa lisebelisoa, re fetola tlhophiso;
2) Tsela e matla - ho ntlafatsa lipotso

Kaha, kea pheta, ka nako eo ho ne ho se ho sa hlaka hore na ke eng hape e lokelang ho fetoloa ka kopo ea ho potlakisa, ho ile ha khethoa tsela - liphetoho moralo oa tafole.

Kahoo, potso e ka sehloohong e hlaha: re tla fetola eng le hore na re tla fetoha joang?

Maemo a pele

Taba ea pele, ho na le ERD ena (e bontšitsoeng ka mokhoa o nolofalitsoeng ho latela maemo):
Mokete o Thabileng kapa mela e 'maloa ea mehopolo mabapi le ho tseba karohano ho PostgreSQL10
Likarolo tsa bohlokoa:

  1. likamano tse ngata ho tse ngata
  2. tafole e se e na le senotlolo sa ho arola

Kopo ea mantlha:

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' ;

Liphetho tsa ts'ebetso ho database ea liteko:
ditjeho : 502 997.55
Nako ea ho phethahatsa: Metsotsoana e 505.

Re bona eng? Kopo e tloaelehileng, e ipapisitseng le selae sa nako.
Ha re etseng monahano o bonolo ka ho fetesisa: haeba ho na le sampole ea selae sa nako, na e tla re thusa? Ho lokile - ho arola.

Ho arola eng?

Ha u habanya feela, khetho e hlakile - ho arola tafole ea "romelo" ho sebelisoa konopo ea "SHIPMENT_DATE" (ho qhomela hole haholo - qetellong ho ile ha hlaha phoso e nyane tlhahisong).

Joang ho arola?

Potso ena le eona ha e thata haholo. Ka lehlohonolo, ho PostgreSQL 10, joale ho na le mokhoa oa ho arola batho.
E le:

  1. Boloka thotobolo ea tafole ea mohloli - pg_dump source_tafole
  2. Hlakola tafole ea mantlha - theola tafole source_table
  3. Theha tafole ea motsoali e nang le likarolo tse fapaneng - theha tafole source_table
  4. Etsa likarolo - theha tafole source_table, theha index
  5. Kenya thotobolo e entsoeng mohatong oa 1 - pg_restore

Lingoliloeng tsa ho arola

Bakeng sa bonolo le boiketlo, mehato ea 2,3,4 e kopantsoe ho ba mongolo o le mong.

E le:
Boloka sebaka sa ho lahla tafole ea mohloli

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

Hlakola tafole ea mohloli + Theha tafole ea motsoali e nang le likarolo tse fapaneng + Theha likarolo

--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
$$;

Ho kenya thotobolo

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

Ho hlahloba liphetho tsa karohano

Re na le phello efe? Mongolo o felletseng oa moralo oa ts'ebetso o moholo ebile oa bora, ka hona hoa khoneha ho ipehela palo ea ho qetela.

E ne le

Litšenyehelo: 502 997.55
Nako ea ts'ebetso: Metsotsoana ea 505.

E se e le

Litšenyehelo: 77 872.36
Nako ea ts'ebetso: Metsotsoana ea 79.

Sephetho se setle haholo. Litšenyehelo tse fokotsehileng le nako ea ts'ebetso. Ka hona, tšebeliso ea ho arola e fana ka phello e lebelletsoeng, 'me ka kakaretso, ha ho makatse.

Thabisa moreki

Liphetho tsa liteko li hlahisitsoe ho moreki hore a li hlahlobe. 'Me ka mor'a ho e hlahloba, ba ile ba fuoa qeto e neng e sa lebelloa: "E kholo, arola tafole ea "data".

Ho joalo, empa re hlahlobile lethathamo la "romelo" le fapaneng ka ho felletseng; tafole ea "data" ha e na sebaka sa "SHIPMENT_DATE".

Ha ho bothata, eketsa, fetola. Taba ea mantlha ke hore moreki o khotsofetse ke sephetho; lintlha tsa ts'ebetsong ha li bohlokoa haholo.

Ho arola tafole e kholo "data"

Ka kakaretso, ha ho mathata a itseng a ileng a hlaha. Leha ho le joalo, algorithm ea ho arola, ehlile, e fetohile hanyane.

E kenyelletsa kholomo ea "SHIPMENT_DATA" tafoleng ea "data".

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

Tlatsa boleng ba kholomo ea "SHIPMENT_DATA" tafoleng ea "data" ka boleng ba kholomo ea lebitso le le leng ho tsoa tafoleng ea "romello".

-----------------------------
--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
$$;

Boloka karolo ea "data" tafoleng

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

Etsa hape "data" ea tafole e arotsoeng

--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
$$;

Laola thotobolo e entsoeng mohatong oa 3.

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

Theha karolo e arohaneng bakeng sa data ea khale

---------------------------------------------------
--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
$$;

Liphetho tsa ho qetela:

E ne le
Litšenyehelo: 502 997.55
Nako ea ho phethahatsa: Metsotsoana e 505.

E se e le
Litšenyehelo: 68 533.70
Nako ea ts'ebetso: metsotsoana 69

E loketse, e loketse haholo. Mme ha re nahana hore tseleng re khonne ho tseba mokhoa oa ho arola PostgreSQL 10 - sephetho se setle haholo.

Khutlela holimo

Na hoa khoneha ho etsa betere le ho feta - YES, U KA KA!Ho etsa sena o hloka ho sebelisa MATERIALIZED VIEW.
ETSA PONO E BONANG 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 ;

Hape re ngola kopo hape:
Ho botsa ka ho sebelisa pono e entsoeng

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';

Mme re fumana sephetho se seng:
E ne le
Litšenyehelo: 502 997.55
Nako ea ho phethahatsa: Metsotsoana ea 505

E se e le
Litšenyehelo: 42 481.16
Nako ea ts'ebetso: Metsotsoana ea 43.

Leha ho le joalo, ha e le hantle, phello e joalo e tšepisang ke e thetsang; mehopolo e hloka ho tsosolosoa. Kahoo nako eohle ea ho amohela data e ke ke ea thusa haholo. Empa e le teko e khahla haholo.

Ha e le hantle, joalokaha ho ile ha etsahala, kea leboha hape asmm le Habru!- Potso e ka ntlafatsoa le ho feta.

Afterword

Kahoo, moreki o khotsofetse. LE hloka ho nka monyetla ka boemo.

Mosebetsi o mocha: U ka tla le eng ho tebisa le ho atolosa?

Ebe kea hopola - bashanyana, ha re na ho beha leihlo polokelong ea rona ea PostgreSQL.

Haufi le pelo, ho ntse ho na le leihlo le leng ka sebopeho sa Cloud Watch ho AWS. Empa molemo oa tlhahlobo ee bakeng sa DBA ke ofe? Ka kakaretso, ha ho letho.

Haeba u na le monyetla oa ho iketsetsa ntho e molemo le e thahasellisang bakeng sa hau, u ke ke ua sebelisa monyetla ona ...
BAKENG SA

Mokete o Thabileng kapa mela e 'maloa ea mehopolo mabapi le ho tseba karohano ho PostgreSQL10

Ke kamoo re fihlang karolong e khahlang haholo:

La 3 Tšitoe, 2018.
Ho etsa qeto ea ho qala lipatlisiso mabapi le bokhoni bo teng ba ho lekola ts'ebetso ea lipotso tsa PostgreSQL.

Empa eo ke pale e fapaneng ka ho felletseng.

E tla ntšetsoa pele…

Source: www.habr.com

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