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





      share












      share










      share



      share










      asked 2 mins ago









      Kit SundeKit Sunde

      139110




      139110






















          0






          active

          oldest

          votes











          Your Answer








          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "182"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: false,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdba.stackexchange.com%2fquestions%2f232583%2fwhy-doesnt-tsrange2018-01-01-null-transactions-transacted-at-use-the-b%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          0






          active

          oldest

          votes








          0






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Database Administrators Stack Exchange!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdba.stackexchange.com%2fquestions%2f232583%2fwhy-doesnt-tsrange2018-01-01-null-transactions-transacted-at-use-the-b%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          Popular posts from this blog

          الفوسفات في المغرب

          Four equal circles intersect: What is the area of the small shaded portion and its height

          جامعة ليفربول