til/postgres/create-hstore-from-two-arrays.md

Create hstore From Two Arrays

PostgreSQL allows the use of the hstore type by enabling the hstore extension. One way to create an instance of hstore data is by passing two arrays to the hstore() function. The first array is a set of keys and the second array is the set of values.

> select hstore(array['one','two','three'], array['1','2','3']);
                hstore
--------------------------------------
 "one"=>"1", "two"=>"2", "three"=>"3"

The two arrays must be the same length or an error will occur.

> select hstore(array['one','two','three'], array['1','2']);
ERROR:  arrays must have same bounds