{"id":15524,"date":"2023-04-03T10:08:20","date_gmt":"2023-04-03T06:38:20","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/filtering-on-denserank-optimized-as-pushed-down-distinct-in-yugabytedb-5mp\/"},"modified":"2023-04-03T10:08:20","modified_gmt":"2023-04-03T06:38:20","slug":"filtering-on-denserank-optimized-as-pushed-down-distinct-in-yugabytedb-5mp","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/filtering-on-denserank-optimized-as-pushed-down-distinct-in-yugabytedb-5mp\/","title":{"rendered":"\u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0628\u0631 \u0631\u0648\u06cc DENSE_RANK() \u0628\u0647\u06cc\u0646\u0647 \u0634\u062f\u0647 \u0628\u0647 \u0635\u0648\u0631\u062a DISTINCT \u067e\u0627\u06cc\u06cc\u0646\u200c\u0631\u0641\u062a\u0647 \u062f\u0631 YugabyteDB"},"content":{"rendered":"
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\u062a\u0648\u0627\u0628\u0639 \u062a\u062d\u0644\u06cc\u0644\u06cc SQL (\u0628\u0627 \u0646\u0627\u0645 \u0645\u0633\u062a\u0639\u0627\u0631 \u062a\u0648\u0627\u0628\u0639 \u067e\u0646\u062c\u0631\u0647) \u0642\u062f\u0631\u062a\u0645\u0646\u062f \u0647\u0633\u062a\u0646\u062f \u0648 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0627\u0632 \u0622\u0646\u0647\u0627 \u0628\u0631\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0631\u062f\u06cc\u0641 \u0627\u0648\u0644 \u062f\u0631 \u06cc\u06a9 \u067e\u0646\u062c\u0631\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f. \u0628\u0627 \u0627\u06cc\u0646 \u062d\u0627\u0644\u060c \u062a\u0627\u0628\u0639 \u062a\u062d\u0644\u06cc\u0644\u06cc \u062f\u0631 \u06cc\u06a9 \u067e\u0631\u0633\u0634 \u0641\u0631\u0639\u06cc \u067e\u0631\u062f\u0627\u0632\u0634 \u0645\u06cc \u0634\u0648\u062f \u062a\u0627 \u0628\u0639\u062f\u0627 \u0641\u06cc\u0644\u062a\u0631 \u0634\u0648\u062f\u060c \u06a9\u0647 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0627\u0632 \u0628\u0631\u062e\u06cc \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0647\u0627 \u062f\u0631 \u062f\u0633\u062a\u0631\u0633\u06cc \u0628\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u06a9\u0646\u062f. \u0645\u0646 \u0646\u0634\u0627\u0646 \u062e\u0648\u0627\u0647\u0645 \u062f\u0627\u062f \u06a9\u0647 \u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0627 \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u062f\u0631 \u0637\u0648\u0644 \u0627\u0633\u06a9\u0646 \u0634\u0627\u062e\u0635\u060c \u0647\u0645\u06cc\u0646 \u06a9\u0627\u0631 \u0631\u0627 \u0628\u0627 \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0628\u06cc\u0634\u062a\u0631\u06cc \u0627\u0646\u062c\u0627\u0645 \u062f\u0627\u062f.<\/p>\n

\u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u06cc\u06a9 \u062c\u062f\u0648\u0644 \u0633\u0627\u062f\u0647 \u0628\u0627 \u0646\u0648\u0639 \u0645\u0634\u0627\u0647\u062f\u0647\u060c \u0646\u0627\u0645\u060c \u0645\u062a\u0646 \u0648 \u0645\u0647\u0631 \u0632\u0645\u0627\u0646\u06cc \u0622\u0645\u062f\u0647 \u0627\u0633\u062a:<\/p>\n

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drop<\/span> table<\/span> observations<\/span>;<\/span>\ncreate<\/span> extension<\/span> if<\/span> not<\/span> exists<\/span> orafce<\/span>;<\/span>\ncreate<\/span> table<\/span> observations<\/span> (<\/span>\n primary<\/span> key<\/span> (<\/span> observation_type<\/span> asc<\/span>,<\/span>observation_name<\/span> asc<\/span>,<\/span> observation_date<\/span> desc<\/span> )<\/span>\n ,<\/span> observation_type<\/span> text<\/span>\n ,<\/span> observation_name<\/span> text<\/span>\n ,<\/span> observation_date<\/span> timestamptz<\/span>\n ,<\/span> observation_text<\/span> text<\/span>\n);<\/span>\ninsert<\/span> into<\/span> observations<\/span> select<\/span> \ndbms_random<\/span>.<\/span>string<\/span>(<\/span>'U'<\/span>,<\/span>1<\/span>),<\/span>dbms_random<\/span>.<\/span>string<\/span>(<\/span>'U'<\/span>,<\/span>2<\/span>),<\/span>clock_timestamp<\/span>(),<\/span> dbms_random<\/span>.<\/span>string<\/span>(<\/span>'L'<\/span>,<\/span>100<\/span>)<\/span> from<\/span> generate_series<\/span>(<\/span>1<\/span>,<\/span>1000<\/span>);<\/span>\n\\<\/span>watch<\/span> 0<\/span>.<\/span>01<\/span>\n<\/code><\/pre>\n
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\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
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\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/p>\nToggle<\/span><\/path><\/svg><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n