{"id":31905,"date":"2019-10-31T21:43:52","date_gmt":"2019-10-31T18:43:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/happy-party-ili-para-strok-vospominanij-o-znakomstve-s-sektsionirovaniem-v-postgresql10\/"},"modified":"2019-10-31T21:43:52","modified_gmt":"2019-10-31T18:43:52","slug":"happy-party-ili-para-strok-vospominanij-o-znakomstve-s-sektsionirovaniem-v-postgresql10","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/administrirovanie\/happy-party-ili-para-strok-vospominanij-o-znakomstve-s-sektsionirovaniem-v-postgresql10","title":{"rendered":"Happy Party vagy n\u00e9h\u00e1ny sor-eml\u00e9k a PostgreSQL10 szekci\u00f3z\u00e1s\u00e1nak megismer\u00e9s\u00e9r\u0151l","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

El\u0151sz\u00f3 vagy hogyan sz\u00fcletett a szekcion\u00e1l\u00e1s \u00f6tlete<\/h4>\n

\nA t\u00f6rt\u00e9net itt kezd\u0151dik: Eml\u00e9kszel, hogyan kezd\u0151d\u00f6tt minden? Minden el\u0151sz\u00f6r \u00e9s \u00fajra t\u00f6rt\u00e9nt.<\/a><\/noindex> Miut\u00e1n szinte minden forr\u00e1s kimer\u00fclt a lek\u00e9rdez\u00e9s optimaliz\u00e1l\u00e1s\u00e1hoz, felmer\u00fclt a k\u00e9rd\u00e9s - mi legyen tov\u00e1bb? \u00cdgy j\u00f6tt a szekcion\u00e1l\u00e1s \u00f6tlete. <\/p>\n

\"Happy
\n
\nL\u00edrai kit\u00e9r\u0151:<\/b>
\nPont ez\u00e9rt, mert ahogy kider\u00fclt, voltak kihaszn\u00e1latlan optimaliz\u00e1l\u00e1si tartal\u00e9kok<\/a><\/noindex>. K\u00f6sz\u00f6n\u00f6m asmm<\/a><\/noindex> \u00e9s a Habrnak!<\/i><\/p>\n

Teh\u00e1t, hogyan tehetj\u00fck boldogabb\u00e1 az \u00fcgyfelet, mik\u00f6zben fejlesztj\u00fck a saj\u00e1t k\u00e9szs\u00e9geinket? <\/p>\n

Ha mindent a legegyszer\u0171bbre leegyszer\u0171s\u00edt\u00fcnk,<\/b>, akkor a dr\u00e1mai jav\u00edt\u00e1s n\u00e9h\u00e1ny \u00fatja a adatb\u00e1zis teljes\u00edtm\u00e9ny\u00e9ben csup\u00e1n kett\u0151:
\n1) Extenz\u00edv megk\u00f6zel\u00edt\u00e9s - er\u0151forr\u00e1sok n\u00f6vel\u00e9se, be\u00e1ll\u00edt\u00e1sok m\u00f3dos\u00edt\u00e1sa;
\n2) Intenz\u00edv megk\u00f6zel\u00edt\u00e9s - lek\u00e9rdez\u00e9sek optimaliz\u00e1l\u00e1sa<\/p>\n

Mivel, ism\u00e9tlem, abban az id\u0151szakban m\u00e1r nem volt vil\u00e1gos, mit lehetne m\u00e9g megv\u00e1ltoztatni a lek\u00e9rdez\u00e9s gyors\u00edt\u00e1s\u00e1hoz, a megold\u00e1s az lett, hogy - t\u00e1bl\u00e1zatok diz\u00e1jnj\u00e1nak megv\u00e1ltoztat\u00e1sa.<\/b><\/p>\n

Teh\u00e1t - felmer\u00fcl a f\u0151 k\u00e9rd\u00e9s - mit \u00e9s hogyan fogunk megv\u00e1ltoztatni? <\/b>
\n<\/a><\/noindex><\/p>\n

Kezd\u0151felt\u00e9telek<\/h2>\n

\nEl\u0151sz\u00f6r is, egy ilyen ERD-nk van (\u00e1br\u00e1zolva \u00f6nk\u00e9nyesen - leegyszer\u0171s\u00edtve):
\n\"Happy
\nF\u0151bb jellemz\u0151k:<\/p>\n

    \n
  1. a 'sok a sokhoz' kapcsolatok<\/li>\n
  2. a t\u00e1bl\u00e1zat m\u00e1r potenci\u00e1lis szekcion\u00e1l\u00e1si kulccsal rendelkezik <\/li>\n<\/ol>\n

    Eredeti lek\u00e9rdez\u00e9s:<\/p>\n

    SELECT\n            p.\"PARAMETER_ID\" as parameter_id,\n            pc.\"PC_NAME\" AS pc_name,\n            pc.\"CUSTOMER_PARTNUMBER\" AS customer_partnumber,\n            w.\"LASERMARK\" AS lasermark,\n            w.\"LOTID\" AS lotid,\n            w.\"REPORTED_VALUE\" AS reported_value,\n            w.\"LOWER_SPEC_LIMIT\" AS lower_spec_limit,\n            w.\"UPPER_SPEC_LIMIT\" AS upper_spec_limit,\n            p.\"TYPE_CALCUL\" AS type_calcul,\n            s.\"SHIPMENT_NAME\" AS shipment_name,\n            s.\"SHIPMENT_DATE\" AS shipment_date,\n            extract(year from s.\"SHIPMENT_DATE\") AS year,\n            extract(month from s.\"SHIPMENT_DATE\") as month,\n            s.\"REPORT_NAME\" AS report_name,\n            p.\"SPARAM_NAME\" AS SPARAM_name,\n            p.\"CUSTOMERPARAM_NAME\" AS customerparam_name\n        FROM data w INNER JOIN shipment s ON s.\"SHIPMENT_ID\" = w.\"SHIPMENT_ID\"\n             INNER JOIN parameters p ON p.\"PARAMETER_ID\" = w.\"PARAMETER_ID\"\n             INNER JOIN shipment_pc sp ON s.\"SHIPMENT_ID\" = sp.\"SHIPMENT_ID\"\n             INNER JOIN pc pc ON pc.\"PC_ID\" = sp.\"PC_ID\"\n             INNER JOIN ( SELECT w2.\"LASERMARK\" , MAX(s2.\"SHIPMENT_DATE\") AS \"SHIPMENT_DATE\"\n                          FROM shipment s2 INNER JOIN data w2 ON s2.\"SHIPMENT_ID\" = w2.\"SHIPMENT_ID\"\n                          GROUP BY w2.\"LASERMARK\"\n                         ) md ON md.\"SHIPMENT_DATE\" = s.\"SHIPMENT_DATE\" AND md.\"LASERMARK\" = w.\"LASERMARK\"\n        WHERE \n             s.\"SHIPMENT_DATE\" >= '2018-07-01' AND s.\"SHIPMENT_DATE\" <= '2018-09-30' ;\n<\/code><\/pre>\n
    \nA v\u00e9grehajt\u00e1s eredm\u00e9nye a tesztadatb\u00e1zison:<\/b>
    \nK\u00f6lts\u00e9g <\/b>: 502 997.55
    \nV\u00e9grehajt\u00e1si id\u0151<\/b>: 505 m\u00e1sodperc.<\/p>\n
    Mit l\u00e1tunk? Egy szok\u00e1sos lek\u00e9rdez\u00e9s, id\u0151beli szeletekre. 
    \nTeh\u00e1t v\u00e9gezz\u00fcnk el egy egyszer\u0171 logikai k\u00f6vetkeztet\u00e9st: ha van egy id\u0151szakos minta, akkor seg\u00edt nek\u00fcnk? Helyes \u2014 a szegment\u00e1l\u00e1s.<\/p>\n
    Mit szegment\u00e1ljunk?<\/h2>\n
    \nEls\u0151 pillant\u00e1sra a v\u00e1laszt\u00e1s egy\u00e9rtelm\u0171 \u2014 a \"shipment\" t\u00e1bl\u00e1zat deklarat\u00edv szegment\u00e1l\u00e1sa a \"SHIPMENT_DATE\" kulcs szerint (gyorsan el\u0151reugorva \u2014 a v\u00e9g\u00e9n a produkci\u00f3 kicsit m\u00e1s lett<\/i>). <\/p>\n
    Hogyan szegment\u00e1ljunk?<\/h2>\n
    \nEz a k\u00e9rd\u00e9s sem t\u00fal neh\u00e9z. Szerencs\u00e9re a PostgreSQL 10-ben most m\u00e1r van egy emberbar\u00e1t szegment\u00e1l\u00e1si mechanizmus. 
    \nTeh\u00e1t: <\/p>\n
      \n
    1.  Mentj\u00fck az eredeti t\u00e1bl\u00e1zat dump-j\u00e1t \u2014 pg_dump source_table<\/i><\/li>\n
    2.  T\u00f6r\u00f6lj\u00fck az eredeti t\u00e1bl\u00e1zatot \u2014 drop table source_table<\/i><\/li>\n
    3. Hozzuk l\u00e9tre a sz\u00fcl\u0151 t\u00e1bl\u00e1zatot a tartom\u00e1ny szerinti szegment\u00e1l\u00e1ssal \u2014 create table source_table<\/i><\/li>\n
    4.  Hozzuk l\u00e9tre a szegmenseket \u2014 create table source_table, create index<\/i><\/li>\n
    5.  Import\u00e1ljuk a dump-ot, amit az 1. l\u00e9p\u00e9sben k\u00e9sz\u00edtett\u00fcnk \u2014 pg_restore<\/i><\/li>\n<\/ol>\n
      <\/p>\n
      Szegment\u00e1l\u00e1si szkriptek <\/h2>\n
      \nAz egyszer\u0171s\u00e9g \u00e9s k\u00e9nyelem kedv\u00e9\u00e9rt a 2., 3. \u00e9s 4. l\u00e9p\u00e9seket egy szkriptbe \u00f6sszevontuk. <\/p>\n
      Teh\u00e1t: 
      \nMentj\u00fck az eredeti t\u00e1bl\u00e1zat dump-j\u00e1t<\/b><\/p>\n
      pg_dump postgres --file=\\\/dump\\\/shipment.dmp --format=c --table=shipment --verbose > \\\/dump\\\/shipment.log 2>&1<\/code><\/pre>\n
      \nT\u00f6r\u00f6lj\u00fck az eredeti t\u00e1bl\u00e1zatot + Hozzuk l\u00e9tre a sz\u00fcl\u0151 t\u00e1bl\u00e1zatot a tartom\u00e1ny szerinti szegment\u00e1l\u00e1ssal + Hozzuk l\u00e9tre a szegmenseket<\/b><\/p>\n
      --create_partition_shipment.sql\ndo language plpgsql $$\ndeclare \nrec_shipment_date RECORD ;\npartition_name varchar;\nindex_name varchar;\ncurrent_year varchar ;\ncurrent_month varchar ;\nbegin_year varchar ;\nbegin_month varchar ;\nnext_year varchar ;\nnext_month varchar ;\nfirst_flag boolean ;\ni integer ;\nbegin\n  RAISE NOTICE 'CREATE TEMPORARY TABLE FOR SHIPMENT_DATE';\n  CREATE TEMP TABLE tmp_shipment_date as select distinct \"SHIPMENT_DATE\" from shipment order by \"SHIPMENT_DATE\" ;\n\n  RAISE NOTICE 'DROP TABLE shipment';\n  drop table shipment cascade ;\n  \n  CREATE TABLE public.shipment\n  (\n    \"SHIPMENT_ID\" integer NOT NULL DEFAULT nextval('shipment_shipment_id_seq'::regclass),\n    \"SHIPMENT_NAME\" character varying(30) COLLATE pg_catalog.\"default\",\n    \"SHIPMENT_DATE\" timestamp without time zone,\n    \"REPORT_NAME\" character varying(40) COLLATE pg_catalog.\"default\"\n  )\n  PARTITION BY RANGE (\"SHIPMENT_DATE\")\n  WITH (\n      OIDS = FALSE\n  )\n  TABLESPACE pg_default;\n\n  RAISE NOTICE 'CREATE PARTITIONS FOR TABLE shipment';\n\n  current_year:='0';\n  current_month:='0';\n\n  begin_year := '0' ;\n  begin_month := '0'  ;\n  next_year := '0' ;\n  next_month := '0'  ;\n\n  FOR rec_shipment_date IN SELECT * FROM tmp_shipment_date LOOP\n      \n      RAISE NOTICE 'SHIPMENT_DATE=%',rec_shipment_date.\"SHIPMENT_DATE\";\n      \n      current_year := date_part('year' ,rec_shipment_date.\"SHIPMENT_DATE\");\n      current_month := date_part('month' ,rec_shipment_date.\"SHIPMENT_DATE\") ; \n\n      IF to_number(current_month,'99') = to_date( begin_year||'.'||begin_month, 'YYYY.MM') AND \n         to_date( current_year||'.'||current_month, 'YYYY.MM') < to_date( next_year||'.'||next_month, 'YYYY.MM') AND \n         NOT first_flag \n      THEN\n         CONTINUE ; \n      ELSE\n       --NEW borders only for second and after time \n       begin_year := current_year ;\n       begin_month := current_month ;   \n   \n        IF current_month = '12' THEN\n          next_year := date_part('year' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 year') ;\n        ELSE\n          next_year := current_year ;\n        END IF;\n     \n       next_month := date_part('month' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 month') ;\n\n      END IF;      \n\n      partition_name := 'shipment_shipment_date_'||begin_year||'-'||begin_month||'-01-'|| next_year||'-'||next_month||'-01'  ;\n \n     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'  ) ; \n\n      index_name := partition_name||'_shipment_id_idx';\n      RAISE NOTICE 'INDEX NAME =%',index_name;\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_ID") TABLESPACE pg_default ' ) ; \n\n      --Drop first time flag\n      first_flag := false ;\n   \n  END LOOP;\n\nend\n$$;<\/code><\/pre>\n
      \nImport\u00e1ljuk a dump-ot<\/b><\/p>\n
      pg_restore -d postgres --data-only --format=c --table=shipment --verbose  shipment.dmp > \/tmp\/data_dump\/shipment_restore.log 2>&1<\/code><\/pre>\n
      <\/p>\n
      Ellen\u0151rizz\u00fck a szekcion\u00e1l\u00e1s eredm\u00e9nyeit<\/h2>\n
      \nMit is eredm\u00e9nyezett mindez? A v\u00e9grehajt\u00e1si terv teljes sz\u00f6vege hossz\u00fa \u00e9s unalmas, \u00edgy nyugodtan lehet az \u00f6sszegz\u0151 sz\u00e1mokra korl\u00e1toz\u00f3dni.<\/p>\n
      Volt<\/h3>\n
      \nK\u00f6lts\u00e9g:<\/b> 502 997.55
      \nV\u00e9grehajt\u00e1si id\u0151:<\/b> 505 m\u00e1sodperc.<\/p>\n
      Lett<\/h3>\n
      \nK\u00f6lts\u00e9g:<\/b> 77 872.36
      \nV\u00e9grehajt\u00e1si id\u0151:<\/b> 79 m\u00e1sodperc.<\/p>\n
      Teljesen j\u00f3 eredm\u00e9ny. Cs\u00f6kkentett\u00fck a k\u00f6lts\u00e9geket \u00e9s a v\u00e9grehajt\u00e1si id\u0151t. \u00cdgy a particion\u00e1l\u00e1s haszn\u00e1lata hozza a v\u00e1rt hat\u00e1st, \u00f6sszess\u00e9g\u00e9ben meglepet\u00e9sek n\u00e9lk\u00fcl. <\/p>\n
      Meg\u00f6rvendeztetni az \u00fcgyfelet<\/h2>\n
      \nA tesztel\u00e9si eredm\u00e9nyeket az \u00fcgyf\u00e9l sz\u00e1m\u00e1ra bemutatt\u00e1k. A megismer\u00e9s ut\u00e1n kicsit v\u00e1ratlan \u00edt\u00e9letet hozott: \u201eRemek, particion\u00e1lja a 'data' t\u00e1bl\u00e1t.\u201d<\/p>\n
      Igen, de mi eg\u00e9szen m\u00e1sik t\u00e1bl\u00e1t, a 'shipment' t\u00e1bl\u00e1t vizsg\u00e1ltuk, a 'data' t\u00e1bl\u00e1nak nincsen 'SHIPMENT_DATE' mez\u0151je.<\/p>\n
      Nem probl\u00e9ma, adjon hozz\u00e1, v\u00e1ltoztasson. A l\u00e9nyeg, hogy az \u00fcgyf\u00e9l el\u00e9gedett legyen a v\u00e9geredm\u00e9nnyel, a megval\u00f3s\u00edt\u00e1s r\u00e9szletei nem annyira fontosak.<\/p>\n
      Particion\u00e1ljuk az alap 'data' t\u00e1bl\u00e1t<\/h2>\n
      \nAlapvet\u0151en k\u00fcl\u00f6n\u00f6sebb neh\u00e9zs\u00e9gek nem mer\u00fcltek fel. B\u00e1r a particion\u00e1l\u00e1si algoritmus term\u00e9szetesen kiss\u00e9 megv\u00e1ltozott.<\/p>\n
      Hozz\u00e1adjuk a 'SHIPMENT_DATE' oszlopot a 'data' t\u00e1bl\u00e1hoz<\/b><\/p>\n
      psql -h host -U database -d user\n=> ALTER TABLE data ADD COLUMN \"SHIPMENT_DATE\" timestamp without time zone ;<\/code><\/pre>\n
      Kit\u00f6ltj\u00fck a 'SHIPMENT_DATE' oszlop \u00e9rt\u00e9keit a 'data' t\u00e1bl\u00e1ban az azonos nev\u0171 oszlop \u00e9rt\u00e9keivel a 'shipment' t\u00e1bl\u00e1b\u00f3l<\/b><\/p>\n
      -----------------------------\n--update_data.sql\n--friss\u00edt\u00e9s a m\u00f3dos\u00edtott 'data' t\u00e1bl\u00e1hoz a 'shipment' t\u00e1bl\u00e1b\u00f3l a 'shipment_data' \u00e9rt\u00e9keivel\n--verzi\u00f3 1.0\ndo language plpgsql $$\ndeclare \nrec_shipment_data RECORD ;\nshipment_date timestamp without time zone ; \nrow_count integer ;\ntotal_rows integer ;\nbegin\n\n  select count(*) into total_rows from shipment ; \n  RAISE NOTICE '\u00d6sszesen %',total_rows;\n  row_count:= 0 ;\n\n  FOR rec_shipment_data IN SELECT * FROM shipment LOOP\n\n   update data set \"SHIPMENT_DATE\" = rec_shipment_data.\"SHIPMENT_DATE\" where \"SHIPMENT_ID\" = rec_shipment_data.\"SHIPMENT_ID\";\n   \n   row_count:=  row_count +1 ;\n   RAISE NOTICE 'sor sz\u00e1m = % , \u00f6sszesen %',row_count,total_rows;\n  END LOOP;\n\nend\n$$;<\/code><\/pre>\n
      \nMentj\u00fck a 'data' t\u00e1bla dump-j\u00e1t<\/b><\/p>\n
      pg_dump postgres --file=\\\/dump\\\/data.dmp --format=c --table=data --verbose > \\\/dump\\\/data.log 2>&1<\\\/source<\/code><\/pre>\n
      \u00dajra l\u00e9trehozzuk a particion\u00e1lt 'data' t\u00e1bl\u00e1t<\/b><\/p>\n
      --create_partition_data.sql\n--part\u00edci\u00f3k l\u00e9trehoz\u00e1sa a \"wafer data\" t\u00e1bl\u00e1hoz a \"shipment_data\" id\u0151szakos oszlop alapj\u00e1n, egy h\u00f3napos id\u0151tartammal\n--verzi\u00f3 1.0\ndo language plpgsql $$\ndeclare \nrec_shipment_date RECORD ;\npartition_name varchar;\nindex_name varchar;\ncurrent_year varchar ;\ncurrent_month varchar ;\nbegin_year varchar ;\nbegin_month varchar ;\nnext_year varchar ;\nnext_month varchar ;\nfirst_flag boolean ;\ni integer ;\n\nbegin\n\n  RAISE NOTICE 'IDEIGLENES T\u00c1BLA L\u00c9TREHOZ\u00c1SA A SZ\u00c1LL\u00cdT\u00c1SI D\u00c1TUMHOZ';\n  CREATE TEMP TABLE tmp_shipment_date as select distinct \"SHIPMENT_DATE\" from shipment order by \"SHIPMENT_DATE\" ;\n\n\n  RAISE NOTICE 'ADAT T\u00c1BLA T\u00d6RL\u00c9SE';\n  drop table data cascade ;\n\n\n  RAISE NOTICE 'PART\u00cdCION\u00c1LT ADAT T\u00c1BLA L\u00c9TREHOZ\u00c1SA';\n  \n  CREATE TABLE public.data\n  (\n    \"RUN_ID\" integer,\n    \"LASERMARK\" character varying(20) COLLATE pg_catalog.\"default\" NOT NULL,\n    \"LOTID\" character varying(80) COLLATE pg_catalog.\"default\",\n    \"SHIPMENT_ID\" integer NOT NULL,\n    \"PARAMETER_ID\" integer NOT NULL,\n    \"INTERNAL_VALUE\" character varying(75) COLLATE pg_catalog.\"default\",\n    \"REPORTED_VALUE\" character varying(75) COLLATE pg_catalog.\"default\",\n    \"LOWER_SPEC_LIMIT\" numeric,\n    \"UPPER_SPEC_LIMIT\" numeric , \n    \"SHIPMENT_DATE\" timestamp without time zone\n  )\n  PARTITION BY RANGE (\"SHIPMENT_DATE\")\n  WITH (\n    OIDS = FALSE\n  )\n  TABLESPACE pg_default ;\n\n\n  RAISE NOTICE 'PART\u00cdCION\u00c1K L\u00c9TREHOZ\u00c1SA A DATA T\u00c1BL\u00c1HOZ';\n\n  current_year:='0';\n  current_month:='0';\n\n  begin_year := '0' ;\n  begin_month := '0'  ;\n  next_year := '0' ;\n  next_month := '0'  ;\n  i := 1;\n\n  FOR rec_shipment_date IN SELECT * FROM tmp_shipment_date LOOP\n      \n      RAISE NOTICE 'SHIPMENT_DATE=%',rec_shipment_date.\"SHIPMENT_DATE\";\n      \n      current_year := date_part('year' ,rec_shipment_date.\"SHIPMENT_DATE\");\n      current_month := date_part('month' ,rec_shipment_date.\"SHIPMENT_DATE\") ; \n\n      --Hat\u00e1rok inicializ\u00e1l\u00e1sa\n      IF   begin_year = '0' THEN\n       RAISE NOTICE '***Hat\u00e1rok inicializ\u00e1l\u00e1sa';\n       first_flag := true ; --els\u0151 alkalom jelz\u0151\n       begin_year := current_year ;\n       begin_month := current_month ;   \n   \n        IF current_month = '12' THEN\n          next_year := date_part('year' ,rec_shipment_date.\"SHIPMENT_DATE\" + interval '1 year') ;\n        ELSE\n          next_year := current_year ;\n        END IF;\n     \n       next_month := date_part('month' ,rec_shipment_date.\"SHIPMENT_DATE\" + interval '1 month') ;\n\n      END IF;\n\n--      RAISE NOTICE 'current_year=% , current_month=% ',current_year,current_month;\n--      RAISE NOTICE 'begin_year=% , begin_month=% ',begin_year,begin_month;\n--      RAISE NOTICE 'next_year=% , next_month=% ',next_year,next_month;\n\n      -- Ellen\u0151rizze az aktu\u00e1lis d\u00e1tumot a hat\u00e1rok k\u00f6z\u00f6tt NEM az els\u0151 alkalomra\n\n      RAISE NOTICE 'Aktu\u00e1lis adat = %',to_char( to_date( current_year||'.'||current_month, 'YYYY.MM'), 'YYYY.MM');\n      RAISE NOTICE 'Kezd\u0151 adat = %',to_char( to_date( begin_year||'.'||begin_month, 'YYYY.MM'), 'YYYY.MM');\n      RAISE NOTICE 'K\u00f6vetkez\u0151 adat = %',to_char( to_date( next_year||'.'||next_month, 'YYYY.MM'), 'YYYY.MM');\n\n      IF to_date( current_year||'.'||current_month, 'YYYY.MM') >= to_date( begin_year||'.'||begin_month, 'YYYY.MM') AND \n         to_date( current_year||'.'||current_month, 'YYYY.MM') < to_date( next_year||'.'||next_month, 'YYYY.MM') AND \n         NOT first_flag \n      THEN\n         RAISE NOTICE '***FOLYTAT\u00c1S';\n         CONTINUE ; \n      ELSE\n       --\u00daj hat\u00e1rok csak m\u00e1sodszor \u00e9s az ut\u00e1n \n       RAISE NOTICE '***\u00daJ HAT\u00c1ROK';\n       begin_year := current_year ;\n       begin_month := current_month ;   \n   \n        IF current_month = '12' THEN\n          next_year := date_part('year' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 year') ;\n        ELSE\n          next_year := current_year ;\n        END IF;\n     \n       next_month := date_part('month' ,rec_shipment_date."SHIPMENT_DATE" + interval '1 month') ;\n\n\n      END IF;      \n\n      IF to_number(current_month,'99') < 10 THEN\n        current_month := '0'||current_month ; \n      END IF ;\n\n      IF to_number(begin_month,'99') < 10 THEN\n        begin_month := '0'||begin_month ; \n      END IF ;\n\n      IF to_number(next_month,'99') < 10 THEN\n        next_month := '0'||next_month ; \n      END IF ;\n\n      RAISE NOTICE 'current_year=% , current_month=% ',current_year,current_month;\n      RAISE NOTICE 'begin_year=% , begin_month=% ',begin_year,begin_month;\n      RAISE NOTICE 'next_year=% , next_month=% ',next_year,next_month;\n\n      partition_name := 'data_'||begin_year||begin_month||'01_'||next_year||next_month||'01'  ;\n\n      RAISE NOTICE 'PART\u00cdCI\u00d3 SZ\u00c1MA % , T\u00c1BLA NEVE =%',i , partition_name;\n      \n      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'  ) ; \n\n      index_name := partition_name||'_shipment_id_parameter_id_idx';\n      RAISE NOTICE 'INDEX N\u00c9V =%',index_name;\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_ID", "PARAMETER_ID") TABLESPACE pg_default ' ) ; \n\n      index_name := partition_name||'_lasermark_idx';\n      RAISE NOTICE 'INDEX N\u00c9V =%',index_name;\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("LASERMARK" COLLATE pg_catalog."default") TABLESPACE pg_default ' ) ; \n\n      index_name := partition_name||'_shipment_id_idx';\n      RAISE NOTICE 'INDEX N\u00c9V =%',index_name;\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_ID") TABLESPACE pg_default ' ) ; \n\n      index_name := partition_name||'_parameter_id_idx';\n      RAISE NOTICE 'INDEX N\u00c9V =%',index_name;\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("PARAMETER_ID") TABLESPACE pg_default ' ) ; \n\n      index_name := partition_name||'_shipment_date_idx';\n      RAISE NOTICE 'INDEX N\u00c9V =%',index_name;\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree ("SHIPMENT_DATE") TABLESPACE pg_default ' ) ; \n\n      --T\u00f6r\u00f6lje az els\u0151 alkalom jelz\u0151t\n      first_flag := false ;\n\n  END LOOP;\nend\n$$;\n<\/code><\/pre>\n
      \nBet\u00f6ltj\u00fck a 3. l\u00e9p\u00e9sben l\u00e9trehozott dump f\u00e1jlt.<\/b><\/p>\n
      pg_restore -h host -u felhaszn\u00e1l\u00f3 -d adatb\u00e1zis --data-only --format=c --table=data --verbose data.dmp > data_restore.log 2>&1<\/code><\/pre>\n
      \nK\u00fcl\u00f6n szekci\u00f3t hozunk l\u00e9tre a r\u00e9gi adatok sz\u00e1m\u00e1ra<\/b><\/p>\n
      ---------------------------------------------------\n--create_partition_for_old_dates.sql\n--part\u00edci\u00f3k l\u00e9trehoz\u00e1sa a r\u00e9gi d\u00e1tumok t\u00e1rol\u00e1s\u00e1hoz \n--verzi\u00f3 1.0\ndo language plpgsql $$\ndeclare \nrec_shipment_date RECORD ;\npartition_name varchar;\nindex_name varchar;\n\nbegin\n\n      SELECT min(\"SHIPMENT_DATE\") AS min_date INTO rec_shipment_date from data ;\n\n      RAISE NOTICE 'R\u00e9gi d\u00e1tum: %', rec_shipment_date.min_date ;\n\n      partition_name := 'data_old_dates'  ;\n\n      RAISE NOTICE 'PART\u00cdC\u00d3 NEVE: %', partition_name;\n\n      EXECUTE format('CREATE TABLE ' || quote_ident(partition_name) || ' PARTITION OF data FOR VALUES FROM ( %L ) TO ( %L )  ', '1900-01-01' , \n              to_char( rec_shipment_date.min_date,'YYYY')||'-'||to_char(rec_shipment_date.min_date,'MM')||'-01'  ) ; \n\n      index_name := partition_name||'_shipment_id_parameter_id_idx';\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree (\"SHIPMENT_ID\", \"PARAMETER_ID\") TABLESPACE pg_default ' ) ; \n\n      index_name := partition_name||'_lasermark_idx';\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree (\"LASERMARK\" COLLATE pg_catalog.\"default\") TABLESPACE pg_default ' ) ; \n\n      index_name := partition_name||'_shipment_id_idx';\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree (\"SHIPMENT_ID\") TABLESPACE pg_default ' ) ; \n\n      index_name := partition_name||'_parameter_id_idx';\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree (\"PARAMETER_ID\") TABLESPACE pg_default ' ) ; \n\n      index_name := partition_name||'_shipment_date_idx';\n      EXECUTE format('CREATE INDEX ' || quote_ident(index_name) || ' ON '|| quote_ident(partition_name) ||' USING btree (\"SHIPMENT_DATE\") TABLESPACE pg_default ' ) ; \n\nend\n$$;<\/code><\/pre>\n
      V\u00e9geredm\u00e9nyek:<\/h3>\n
      \nVolt<\/b>
      \nK\u00f6lts\u00e9g:<\/b> 502 997.55
      \nV\u00e9grehajt\u00e1si id\u0151<\/b>: 505 m\u00e1sodperc.<\/p>\n
      Lett<\/b>
      \nK\u00f6lts\u00e9g:<\/b> 68 533.70
      \nV\u00e9grehajt\u00e1si id\u0151:<\/b> 69 m\u00e1sodperc<\/p>\n
      Megfelel\u0151, igaz\u00e1n megfelel\u0151. Figyelembe v\u00e9ve, hogy \u00fatk\u00f6zben siker\u00fclt viszonylag elsaj\u00e1t\u00edtani a PostgreSQL 10 szekcion\u00e1l\u00f3 mechanizmus\u00e1t - Kiv\u00e1l\u00f3 eredm\u00e9ny.<\/p>\n
      L\u00edrai kit\u00e9r\u0151<\/h2>\n
      \nDe lehet m\u00e9g jobb - IGEN, LEHET!<\/b>Ehhez MATERIALIZED VIEW-t kell haszn\u00e1lni.
      \nCREATE MATERIALIZED VIEW LASERMARK_VIEW<\/b><\/p>\n
      CREATE MATERIALIZED VIEW LASERMARK_VIEW \nAS\nSELECT w.\"LASERMARK\" , MAX(s.\"SHIPMENT_DATE\") AS \"SHIPMENT_DATE\"\nFROM shipment s INNER JOIN data w ON s.\"SHIPMENT_ID\" = w.\"SHIPMENT_ID\" \nGROUP BY w.\"LASERMARK\" ;\n\nCREATE INDEX lasermark_vw_shipment_date_ind on lasermark_view USING btree (\"SHIPMENT_DATE\") TABLESPACE pg_default;\nanalyze lasermark_view ;\n<\/code><\/pre>\n
      \nIsm\u00e9t \u00e1tfogalmazzuk a lek\u00e9rdez\u00e9st:
      \nLek\u00e9rdez\u00e9s materialized view haszn\u00e1lat\u00e1val<\/b><\/p>\n
      V\u00c1LASZ\n            p.\"PARAMETER_ID\" as parameter_id,\n            pc.\"PC_NAME\" AS pc_name,\n            pc.\"CUSTOMER_PARTNUMBER\" AS customer_partnumber,\n            w.\"LASERMARK\" AS lasermark,\n            w.\"LOTID\" AS lotid,\n            w.\"REPORTED_VALUE\" AS reported_value,\n            w.\"LOWER_SPEC_LIMIT\" AS lower_spec_limit,\n            w.\"UPPER_SPEC_LIMIT\" AS upper_spec_limit,\n            p.\"TYPE_CALCUL\" AS type_calcul,\n            s.\"SHIPMENT_NAME\" AS shipment_name,\n            s.\"SHIPMENT_DATE\" AS shipment_date,\n            extract(year from s.\"SHIPMENT_DATE\") AS year,\n            extract(month from s.\"SHIPMENT_DATE\") as month,\n            s.\"REPORT_NAME\" AS report_name,\n            p.\"STC_NAME\" AS STC_name,\n            p.\"CUSTOMERPARAM_NAME\" AS customerparam_name\n        FROM data w INNER JOIN shipment s ON s.\"SHIPMENT_ID\" = w.\"SHIPMENT_ID\"\n             INNER JOIN parameters p ON p.\"PARAMETER_ID\" = w.\"PARAMETER_ID\"\n             INNER JOIN shipment_pc sp ON s.\"SHIPMENT_ID\" = sp.\"SHIPMENT_ID\"\n             INNER JOIN pc pc ON pc.\"PC_ID\" = sp.\"PC_ID\"\n             INNER JOIN LASERMARK_VIEW md ON md.\"SHIPMENT_DATE\" = s.\"SHIPMENT_DATE\" AND md.\"LASERMARK\" = w.\"LASERMARK\"\n        WHERE \n              s.\"SHIPMENT_DATE\" >= '2018-07-01' AND s.\"SHIPMENT_DATE\" <= '2018-09-30';\n<\/code><\/pre>\n
      \n\u00c9s kapunk egy \u00fajabb eredm\u00e9nyt:<\/b>
      \nVolt<\/b>
      \nK\u00f6lts\u00e9g:<\/b> 502 997.55
      \nV\u00e9grehajt\u00e1si id\u0151<\/b>: 505 m\u00e1sodperc<\/p>\n
      Lett<\/b>
      \nK\u00f6lts\u00e9g:<\/b> 42 481.16
      \nV\u00e9grehajt\u00e1si id\u0151:<\/b> 43 m\u00e1sodperc.<\/p>\n
      B\u00e1r nyilv\u00e1nval\u00f3an, egy ilyen \u00edg\u00e9retes eredm\u00e9ny megt\u00e9veszt\u0151 lehet, a megjelen\u00e9seket friss\u00edteni kell. Teh\u00e1t az adatok megszerz\u00e9s\u00e9nek v\u00e9gs\u0151 ideje nem sokat fog seg\u00edteni. De k\u00eds\u00e9rletk\u00e9nt mindenk\u00e9ppen \u00e9rdekes.<\/p>\n
      Val\u00f3j\u00e1ban, ahogy kider\u00fclt, m\u00e9g egyszer k\u00f6sz\u00f6n\u00f6m asmm<\/a><\/noindex> \u00e9s a Habrunak !- a lek\u00e9rdez\u00e9s m\u00e9g jobb\u00e1 tehet\u0151. <\/a><\/noindex><\/p>\n
      Ut\u00f3sz\u00f3<\/h2>\n
      \nTeh\u00e1t az \u00fcgyf\u00e9l el\u00e9gedett. \u00c9s a k\u00e9sz\u00fcl\u00e9k hely\u00e9nek ismeret\u00e9re. Ha <\/b>kihaszn\u00e1lni a helyzetet. <\/p>\n
      \u00daj feladat<\/b>: Mit lehetne kital\u00e1lni, hogy m\u00e9lyebb \u00e9s sz\u00e9lesebb legyen?<\/p>\n
      \u00c9s itt jut esz\u00fcnkbe \u2014 sr\u00e1cok, de hiszen nincs monitoroz\u00e1sunk a PostgreSQL adatb\u00e1zisainkr\u00f3l.<\/p>\n
      A sz\u00edv\u00fcnkre tessz\u00fck a kez\u00fcnket, van valamif\u00e9le monitoroz\u00e1s a Cloud Watch-on az AWS-en. De mi haszna van ebb\u0151l a monitoroz\u00e1sb\u00f3l a DBA sz\u00e1m\u00e1ra? Val\u00f3j\u00e1ban szinte semmi.<\/p>\n
      Ha lehet\u0151s\u00e9g ny\u00edlt egy hasznos \u00e9s \u00e9rdekes dolog l\u00e9trehoz\u00e1s\u00e1ra magunk sz\u00e1m\u00e1ra, nem lehet elhagyni egy ilyen es\u00e9lyt ...
      \nMERT
      \n<\/b>
      \n\"Happy
      \n
      \n\u00cdgy jutottunk el a leg\u00e9rdekesebbhez:<\/p>\n
      2018. december 3.<\/b>
      \nD\u00f6nt\u00e9s a PostgreSQL lek\u00e9rdez\u00e9sek teljes\u00edtm\u00e9ny\u00e9nek monitoroz\u00e1s\u00e1nak lehet\u0151s\u00e9geinek kutat\u00e1s\u00e1r\u00f3l.\n<\/p><\/blockquote>\n
      De ez m\u00e1r egy teljesen m\u00e1sik t\u00f6rt\u00e9net.<\/b><\/p>\n
      Folytat\u00e1s, k\u00f6vetkezik...<\/i>
      \n
      Forr\u00e1s:       habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
      \u041f\u0440\u0435\u0434\u0438\u0441\u043b\u043e\u0432\u0438\u0435 \u0438\u043b\u0438 \u043a\u0430\u043a \u0432\u043e\u0437\u043d\u0438\u043a\u043b\u0430 \u0438\u0434\u0435\u044f \u0441\u0435\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u041d\u0430\u0447\u0430\u043b\u043e \u0438\u0441\u0442\u043e\u0440\u0438\u0438 \u0437\u0434\u0435\u0441\u044c: \u0422\u044b \u043f\u043e\u043c\u043d\u0438\u0448\u044c, \u043a\u0430\u043a \u0432\u0441\u0435 \u043d\u0430\u0447\u0438\u043d\u0430\u043b\u043e\u0441\u044c. \u0412\u0441\u0435 \u0431\u044b\u043b\u043e \u0432\u043f\u0435\u0440\u0432\u044b\u0435 \u0438 \u0432\u043d\u043e\u0432\u044c. \u041f\u043e\u0441\u043b\u0435 \u0442\u043e\u0433\u043e, \u043a\u0430\u043a \u043f\u043e\u0447\u0442\u0438 \u0432\u0441\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u044b \u0434\u043b\u044f \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u0437\u0430\u043f\u0440\u043e\u0441\u0430, \u043d\u0430 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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":23765,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-31905","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Happy Party vagy p\u00e1r sor-eml\u00e9k a PostgreSQL10 szekcion\u00e1l\u00e1s\u00e1nak megismer\u00e9s\u00e9r\u0151l | ProHoster","description":"El\u0151sz\u00f3 vagy hogyan sz\u00fcletett a szekcion\u00e1l\u00e1s \u00f6tlete A t\u00f6rt\u00e9net itt kezd\u0151dik: Eml\u00e9kszel, hogyan indult az 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