Hive: error when trying to map key and value
I have a query like this where I am trying to convert array<struct<key:string,value:array<string>> to map<string,array<string>>.
The query is
SELECT name, address, location, map(collect_set(k1),collect_set(concat_ws("",v1))) AS key_one
FROM table_a
lateral view inline(key_one) t1 as k1,v1
GROUP BY name, address, location;
I get the error as FAILED: SemanticException [Error 10016]: Line 1:62 Argument type mismatch 'v1': Primitive Type is expected but array<string>" is found
hadoop hive hiveql
asked Nov 12 at 3:14
John Constantine
1417
add a comment |
I have a query like this where I am trying to convert array<struct<key:string,value:array<string>> to map<string,array<string>>.
The query is
SELECT name, address, location, map(collect_set(k1),collect_set(concat_ws("",v1))) AS key_one
FROM table_a
lateral view inline(key_one) t1 as k1,v1
GROUP BY name, address, location;
I get the error as FAILED: SemanticException [Error 10016]: Line 1:62 Argument type mismatch 'v1': Primitive Type is expected but array<string>" is found
hadoop hive hiveql
asked Nov 12 at 3:14
John Constantine
1417
add a comment |
I have a query like this where I am trying to convert array<struct<key:string,value:array<string>> to map<string,array<string>>.
The query is
SELECT name, address, location, map(collect_set(k1),collect_set(concat_ws("",v1))) AS key_one
FROM table_a
lateral view inline(key_one) t1 as k1,v1
GROUP BY name, address, location;
I get the error as FAILED: SemanticException [Error 10016]: Line 1:62 Argument type mismatch 'v1': Primitive Type is expected but array<string>" is found
hadoop hive hiveql
asked Nov 12 at 3:14
John Constantine
1417
I have a query like this where I am trying to convert array<struct<key:string,value:array<string>> to map<string,array<string>>.
The query is
SELECT name, address, location, map(collect_set(k1),collect_set(concat_ws("",v1))) AS key_one
FROM table_a
lateral view inline(key_one) t1 as k1,v1
GROUP BY name, address, location;
I get the error as FAILED: SemanticException [Error 10016]: Line 1:62 Argument type mismatch 'v1': Primitive Type is expected but array<string>" is found
hadoop hive hiveql
hadoop hive hiveql
asked Nov 12 at 3:14
John Constantine
1417
asked Nov 12 at 3:14
John Constantine
1417
edited Nov 12 at 3:57
asked Nov 12 at 3:14
John Constantine
1417
asked Nov 12 at 3:14
John Constantine
1417
asked Nov 12 at 3:14
John Constantine
1417
1417
add a comment |
add a comment |
1 Answer
1
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votes
The error says that you can not have complex data types (i.e. array, struct, map) as a key to map.
And that make sense right. key has to be only one value so it has to be primitive (i.e String, Int, BigInt)
However, your code tries to put key as array and so the error. What you need to do is first explode the array and then try to get the key and value to form a map.
This might work.
create table
create table temp.test_struct (test array<struct<key:string,value:array<string>>>)
Insert values
insert into temp.test_struct
select array(
NAMED_STRUCT("key", "k1", "value", array("a","b","c")),
NAMED_STRUCT("key", "k2", "value", array("x","y","z"))
) from (select 'a') x
Convert Array of Struct to map
select test, map(t1.key, t1.value) map_col
from
temp.test_struct
lateral view inline(test) t1
answered Nov 13 at 16:02
Gaurang Shah
2,94611132
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The error says that you can not have complex data types (i.e. array, struct, map) as a key to map.
And that make sense right. key has to be only one value so it has to be primitive (i.e String, Int, BigInt)
However, your code tries to put key as array and so the error. What you need to do is first explode the array and then try to get the key and value to form a map.
This might work.
create table
create table temp.test_struct (test array<struct<key:string,value:array<string>>>)
Insert values
insert into temp.test_struct
select array(
NAMED_STRUCT("key", "k1", "value", array("a","b","c")),
NAMED_STRUCT("key", "k2", "value", array("x","y","z"))
) from (select 'a') x
Convert Array of Struct to map
select test, map(t1.key, t1.value) map_col
from
temp.test_struct
lateral view inline(test) t1
answered Nov 13 at 16:02
Gaurang Shah
2,94611132
add a comment |
The error says that you can not have complex data types (i.e. array, struct, map) as a key to map.
And that make sense right. key has to be only one value so it has to be primitive (i.e String, Int, BigInt)
However, your code tries to put key as array and so the error. What you need to do is first explode the array and then try to get the key and value to form a map.
This might work.
create table
create table temp.test_struct (test array<struct<key:string,value:array<string>>>)
Insert values
insert into temp.test_struct
select array(
NAMED_STRUCT("key", "k1", "value", array("a","b","c")),
NAMED_STRUCT("key", "k2", "value", array("x","y","z"))
) from (select 'a') x
Convert Array of Struct to map
select test, map(t1.key, t1.value) map_col
from
temp.test_struct
lateral view inline(test) t1
answered Nov 13 at 16:02
Gaurang Shah
2,94611132
add a comment |
The error says that you can not have complex data types (i.e. array, struct, map) as a key to map.
And that make sense right. key has to be only one value so it has to be primitive (i.e String, Int, BigInt)
However, your code tries to put key as array and so the error. What you need to do is first explode the array and then try to get the key and value to form a map.
This might work.
create table
create table temp.test_struct (test array<struct<key:string,value:array<string>>>)
Insert values
insert into temp.test_struct
select array(
NAMED_STRUCT("key", "k1", "value", array("a","b","c")),
NAMED_STRUCT("key", "k2", "value", array("x","y","z"))
) from (select 'a') x
Convert Array of Struct to map
select test, map(t1.key, t1.value) map_col
from
temp.test_struct
lateral view inline(test) t1
answered Nov 13 at 16:02
Gaurang Shah
2,94611132
The error says that you can not have complex data types (i.e. array, struct, map) as a key to map.
And that make sense right. key has to be only one value so it has to be primitive (i.e String, Int, BigInt)
However, your code tries to put key as array and so the error. What you need to do is first explode the array and then try to get the key and value to form a map.
This might work.
create table
create table temp.test_struct (test array<struct<key:string,value:array<string>>>)
Insert values
insert into temp.test_struct
select array(
NAMED_STRUCT("key", "k1", "value", array("a","b","c")),
NAMED_STRUCT("key", "k2", "value", array("x","y","z"))
) from (select 'a') x
Convert Array of Struct to map
select test, map(t1.key, t1.value) map_col
from
temp.test_struct
lateral view inline(test) t1
answered Nov 13 at 16:02
Gaurang Shah
2,94611132
answered Nov 13 at 16:02
Gaurang Shah
2,94611132
answered Nov 13 at 16:02
Gaurang Shah
2,94611132
answered Nov 13 at 16:02
Gaurang Shah
2,94611132
2,94611132
add a comment |
add a comment |
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