[
https://issues.apache.org/jira/browse/HIVE-14159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Simanchal Das updated HIVE-14159:
---------------------------------
Description:
Problem Statement:
When we are working with complex structure of data like avro.
Most of the times we are encountering array contains multiple tuples and each
tuple have struct schema.
Suppose here struct schema is like below:
{noformat}
{
"name": "employee",
"type": [{
"type": "record",
"name": "Employee",
"namespace": "com.company.Employee",
"fields": [{
"name": "empId",
"type": "int"
}, {
"name": "empName",
"type": "string"
}, {
"name": "age",
"type": "int"
}, {
"name": "salary",
"type": "double"
}]
}]
}
{noformat}
Then while running our hive query complex array looks like array of employee
objects.
{noformat}
Example:
//(array<struct<empId,empName,age,salary>>)
Array[Employee(100,Foo,20,20990),Employee(500,Boo,30,50990),Employee(700,Harry,25,40990),Employee(100,Tom,35,70990)]
{noformat}
When we are implementing business use cases day to day life we are encountering
problems like sorting a tuple array by specific field[s] like
empId,name,salary,etc by ASC or DESC order.
Proposal:
I have developed a udf 'sort_array_by' which will sort a tuple array by one or
more fields in ASC or DESC order provided by user ,default is ascending order .
{noformat}
Example:
1.Select
sort_array_by(array[struct(100,Foo,20,20990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Salary","ASC");
output:
array[struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(500,Boo,30,50990),struct(100,Tom,35,70990)]
2.Select
sort_array_by(array[struct(100,Foo,20,20990),struct(500,Boo,30,80990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Name","Salary","ASC");
output:
array[struct(500,Boo,30,50990),struct(500,Boo,30,80990),struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)]
3.Select
sort_array_by(array[struct(100,Foo,20,20990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Name","Salary","Age,"ASC");
output:
array[struct(500,Boo,30,50990),struct(500,Boo,30,80990),struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)]
{noformat}
was:
Problem Statement:
When we are working with complex structure of data like avro.
Most of the times we are encountering array contains multiple tuples and each
tuple have struct schema.
Suppose here struct schema is like below:
{noformat}
{
"name": "employee",
"type": [{
"type": "record",
"name": "Employee",
"namespace": "com.company.Employee",
"fields": [{
"name": "empId",
"type": "int"
}, {
"name": "empName",
"type": "string"
}, {
"name": "age",
"type": "int"
}, {
"name": "salary",
"type": "double"
}]
}]
}
{noformat}
Then while running our hive query complex array looks like array of employee
objects.
{noformat}
Example:
//(array<struct<empId,empName,age,salary>>)
Array[Employee(100,Foo,20,20990),Employee(500,Boo,30,50990),Employee(700,Harry,25,40990),Employee(100,Tom,35,70990)]
{noformat}
When we are implementing business use cases day to day life we are encountering
problems like sorting a tuple array by specific field[s] like
empId,name,salary,etc by ASC or DESC order.
Proposal:
I have developed a udf 'sort_array_by' which will sort a tuple array by one or
more fields in ASC or DESC order provided by user ,default is ascending order .
{noformat}
Example:
1.Select
sort_array_field(array[struct(100,Foo,20,20990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Salary","ASC");
output:
array[struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(500,Boo,30,50990),struct(100,Tom,35,70990)]
2.Select
sort_array_field(array[struct(100,Foo,20,20990),struct(500,Boo,30,80990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Name","Salary","ASC");
output:
array[struct(500,Boo,30,50990),struct(500,Boo,30,80990),struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)]
3.Select
sort_array_field(array[struct(100,Foo,20,20990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Name","Salary","Age,"ASC");
output:
array[struct(500,Boo,30,50990),struct(500,Boo,30,80990),struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)]
{noformat}
> sorting of tuple array using multiple field[s]
> ----------------------------------------------
>
> Key: HIVE-14159
> URL: https://issues.apache.org/jira/browse/HIVE-14159
> Project: Hive
> Issue Type: Improvement
> Components: UDF
> Reporter: Simanchal Das
> Assignee: Simanchal Das
> Labels: TODOC2.2, patch
> Fix For: 2.2.0
>
> Attachments: HIVE-14159.1.patch, HIVE-14159.2.patch,
> HIVE-14159.3.patch, HIVE-14159.4.patch
>
>
> Problem Statement:
> When we are working with complex structure of data like avro.
> Most of the times we are encountering array contains multiple tuples and each
> tuple have struct schema.
> Suppose here struct schema is like below:
> {noformat}
> {
> "name": "employee",
> "type": [{
> "type": "record",
> "name": "Employee",
> "namespace": "com.company.Employee",
> "fields": [{
> "name": "empId",
> "type": "int"
> }, {
> "name": "empName",
> "type": "string"
> }, {
> "name": "age",
> "type": "int"
> }, {
> "name": "salary",
> "type": "double"
> }]
> }]
> }
> {noformat}
> Then while running our hive query complex array looks like array of employee
> objects.
> {noformat}
> Example:
> //(array<struct<empId,empName,age,salary>>)
>
> Array[Employee(100,Foo,20,20990),Employee(500,Boo,30,50990),Employee(700,Harry,25,40990),Employee(100,Tom,35,70990)]
> {noformat}
> When we are implementing business use cases day to day life we are
> encountering problems like sorting a tuple array by specific field[s] like
> empId,name,salary,etc by ASC or DESC order.
> Proposal:
> I have developed a udf 'sort_array_by' which will sort a tuple array by one
> or more fields in ASC or DESC order provided by user ,default is ascending
> order .
> {noformat}
> Example:
> 1.Select
> sort_array_by(array[struct(100,Foo,20,20990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Salary","ASC");
> output:
> array[struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(500,Boo,30,50990),struct(100,Tom,35,70990)]
>
> 2.Select
> sort_array_by(array[struct(100,Foo,20,20990),struct(500,Boo,30,80990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Name","Salary","ASC");
> output:
> array[struct(500,Boo,30,50990),struct(500,Boo,30,80990),struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)]
> 3.Select
> sort_array_by(array[struct(100,Foo,20,20990),struct(500,Boo,30,50990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)],"Name","Salary","Age,"ASC");
> output:
> array[struct(500,Boo,30,50990),struct(500,Boo,30,80990),struct(100,Foo,20,20990),struct(700,Harry,25,40990),struct(100,Tom,35,70990)]
> {noformat}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
