Why doesn't tsrange('2018-01-01', NULL) @> transactions.transacted_at use the b-tree index?












0















Given



CREATE TABLE transactions
(
transacted_at TIMESTAMP
);

CREATE INDEX IF NOT EXISTS index_transactions_on_transacted_at
ON transactions (transacted_at);


Then this doesn't use the index:



SELECT * FROM transactions
WHERE tsrange('2018-01-01', NULL) @> transacted_at;


But this does:



SELECT * FROM transactions
WHERE transacted_at > '2018-02-01'


I realize that I can simply deconstruct the range and do the comparison that works, but I'd like to know how I can use ranges natively with an index on the transactions table.



What am I missing?









share



























    0















    Given



    CREATE TABLE transactions
    (
    transacted_at TIMESTAMP
    );

    CREATE INDEX IF NOT EXISTS index_transactions_on_transacted_at
    ON transactions (transacted_at);


    Then this doesn't use the index:



    SELECT * FROM transactions
    WHERE tsrange('2018-01-01', NULL) @> transacted_at;


    But this does:



    SELECT * FROM transactions
    WHERE transacted_at > '2018-02-01'


    I realize that I can simply deconstruct the range and do the comparison that works, but I'd like to know how I can use ranges natively with an index on the transactions table.



    What am I missing?









    share

























      0












      0








      0








      Given



      CREATE TABLE transactions
      (
      transacted_at TIMESTAMP
      );

      CREATE INDEX IF NOT EXISTS index_transactions_on_transacted_at
      ON transactions (transacted_at);


      Then this doesn't use the index:



      SELECT * FROM transactions
      WHERE tsrange('2018-01-01', NULL) @> transacted_at;


      But this does:



      SELECT * FROM transactions
      WHERE transacted_at > '2018-02-01'


      I realize that I can simply deconstruct the range and do the comparison that works, but I'd like to know how I can use ranges natively with an index on the transactions table.



      What am I missing?









      share














      Given



      CREATE TABLE transactions
      (
      transacted_at TIMESTAMP
      );

      CREATE INDEX IF NOT EXISTS index_transactions_on_transacted_at
      ON transactions (transacted_at);


      Then this doesn't use the index:



      SELECT * FROM transactions
      WHERE tsrange('2018-01-01', NULL) @> transacted_at;


      But this does:



      SELECT * FROM transactions
      WHERE transacted_at > '2018-02-01'


      I realize that I can simply deconstruct the range and do the comparison that works, but I'd like to know how I can use ranges natively with an index on the transactions table.



      What am I missing?







      postgresql-9.6





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      asked 2 mins ago









      Kit SundeKit Sunde

      139110




      139110






















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