PrestoDB: Filter to get rows where element is contained in map column's keys












0















I have a column of type map(varchar, varchar). I would like to filter on the keys of the map to get rows of the table where the map contains a given string.



How do I check whether a varchar is contained in the keys of a map type column?






prestodb







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    0















    I have a column of type map(varchar, varchar). I would like to filter on the keys of the map to get rows of the table where the map contains a given string.



    How do I check whether a varchar is contained in the keys of a map type column?






    prestodb







    share|improve this question



























      0












      0








      0








      I have a column of type map(varchar, varchar). I would like to filter on the keys of the map to get rows of the table where the map contains a given string.



      How do I check whether a varchar is contained in the keys of a map type column?






      prestodb







      share|improve this question
















      I have a column of type map(varchar, varchar). I would like to filter on the keys of the map to get rows of the table where the map contains a given string.



      How do I check whether a varchar is contained in the keys of a map type column?






      prestodb




      prestodb






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 20 '18 at 3:38







      Omkar Neogi

















      asked Nov 20 '18 at 1:38









      Omkar NeogiOmkar Neogi

      132210




      132210
























          1 Answer
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          Get rows with a certain string (varchar) / strings as keys



          select * from planet
          
where map_keys(tags) = ARRAY['barrier'];


          Get rows where an array column contains a particular string (varchar)



          select * from planet
          
where contains(map_keys(tags), 'barrier');


          In this case,




          1. table name: planet

          2. schema of column "tags": map(varchar, varchar)

          3. String I was searching for in column tags: 'barrier'






          share|improve this answer























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            1 Answer
            1






            active

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            active

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            active

            oldest

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            0














            Get rows with a certain string (varchar) / strings as keys



            select * from planet
            
where map_keys(tags) = ARRAY['barrier'];


            Get rows where an array column contains a particular string (varchar)



            select * from planet
            
where contains(map_keys(tags), 'barrier');


            In this case,




            1. table name: planet

            2. schema of column "tags": map(varchar, varchar)

            3. String I was searching for in column tags: 'barrier'






            share|improve this answer




























              0














              Get rows with a certain string (varchar) / strings as keys



              select * from planet
              
where map_keys(tags) = ARRAY['barrier'];


              Get rows where an array column contains a particular string (varchar)



              select * from planet
              
where contains(map_keys(tags), 'barrier');


              In this case,




              1. table name: planet

              2. schema of column "tags": map(varchar, varchar)

              3. String I was searching for in column tags: 'barrier'






              share|improve this answer


























                0












                0








                0







                Get rows with a certain string (varchar) / strings as keys



                select * from planet
                
where map_keys(tags) = ARRAY['barrier'];


                Get rows where an array column contains a particular string (varchar)



                select * from planet
                
where contains(map_keys(tags), 'barrier');


                In this case,




                1. table name: planet

                2. schema of column "tags": map(varchar, varchar)

                3. String I was searching for in column tags: 'barrier'






                share|improve this answer













                Get rows with a certain string (varchar) / strings as keys



                select * from planet
                
where map_keys(tags) = ARRAY['barrier'];


                Get rows where an array column contains a particular string (varchar)



                select * from planet
                
where contains(map_keys(tags), 'barrier');


                In this case,




                1. table name: planet

                2. schema of column "tags": map(varchar, varchar)

                3. String I was searching for in column tags: 'barrier'







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 20 '18 at 3:37









                Omkar NeogiOmkar Neogi

                132210




                132210
































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