[CARBONDATA-1675] Incorrect result displays after applying drop column query on a table

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.3.0
• Component/s: presto-integration
• Environment: spark 2.1
• Assignee: anubhav tarar
• Reporter: Vandana Yadav
• Created: 08/Nov/17 08:22
• Updated: 24/Nov/17 07:27
• Resolved: 24/Nov/17 07:27

Description

Incorrect result displays after applying drop column query on a table

Steps to reproduce:
1) Create table:
CREATE TABLE uniqdata(CUST_ID int,CUST_NAME String,ACTIVE_EMUI_VERSION string, DOB timestamp, DOJ timestamp, BIGINT_COLUMN1 bigint,BIGINT_COLUMN2 bigint,DECIMAL_COLUMN1 decimal(30,10), DECIMAL_COLUMN2 decimal(36,10),Double_COLUMN1 double, Double_COLUMN2 double,INTEGER_COLUMN1 int) STORED BY 'org.apache.carbondata.format' TBLPROPERTIES ("TABLE_BLOCKSIZE"= "256 MB")

2) Load data
LOAD DATA INPATH 'hdfs://localhost:54310/Data/uniqdata/2000_UniqData.csv' into table uniqdata OPTIONS('DELIMITER'=',' , 'QUOTECHAR'='"','BAD_RECORDS_ACTION'='FORCE','FILEHEADER'='CUST_ID,CUST_NAME,ACTIVE_EMUI_VERSION,DOB,DOJ,BIGINT_COLUMN1,BIGINT_COLUMN2,DECIMAL_COLUMN1,DECIMAL_COLUMN2,Double_COLUMN1,Double_COLUMN2,INTEGER_COLUMN1')

3)Execute Query:
desc uniqdata
output:
---------------------------------------------+

col_name

data_type

comment

---------------------------------------------+

CUST_ID	int	NULL
CUST_NAME	string	NULL
ACTIVE_EMUI_VERSION	string	NULL
DOB	timestamp	NULL
DOJ	timestamp	NULL
BIGINT_COLUMN1	bigint	NULL
BIGINT_COLUMN2	bigint	NULL
DECIMAL_COLUMN1	decimal(30,10)	NULL
DECIMAL_COLUMN2	decimal(36,10)	NULL
Double_COLUMN1	double	NULL
Double_COLUMN2	double	NULL
INTEGER_COLUMN1	int	NULL

---------------------------------------------+
12 rows selected (0.041 seconds)

Start Presto server
sudo ./bin/launcher run

run presto CLI:
./presto --server localhost:9000 --catalog carbondata --schema newpresto

On Presto CLI:
1) Execute Query:
a) desc uniqdata;
output:
Column | Type | Extra | Comment
---------------------------------------+--------
cust_id | integer | |
cust_name | varchar | |
active_emui_version | varchar | |
dob | timestamp | |
doj | timestamp | |
bigint_column1 | bigint | |
bigint_column2 | bigint | |
decimal_column1 | decimal(30,10) | |
decimal_column2 | decimal(36,10) | |
double_column1 | double | |
double_column2 | double | |
integer_column1 | integer | |
(12 rows)

b) Now on Beeline execute the drop column query on the table which is :
alter table uniqdata drop columns (CUST_ID)

c)desc uniqdata;

Expected output: it should display updated table description as on beeline

Actual output:
on beeline:
0: jdbc:hive2://localhost:10000> desc uniqdata;
---------------------------------------------+

col_name

data_type

comment

---------------------------------------------+

cust_name	string	NULL
active_emui_version	string	NULL
dob	timestamp	NULL
doj	timestamp	NULL
bigint_column1	bigint	NULL
bigint_column2	bigint	NULL
decimal_column1	decimal(30,10)	NULL
decimal_column2	decimal(36,10)	NULL
double_column1	double	NULL
double_column2	double	NULL
integer_column1	int	NULL

---------------------------------------------+
11 rows selected (0.039 seconds)

On presto CLI

presto:newpresto> desc uniqdata;
Column | Type | Extra | Comment
---------------------------------------+--------
cust_id | integer | |
cust_name | varchar | |
active_emui_version | varchar | |
dob | timestamp | |
doj | timestamp | |
bigint_column1 | bigint | |
bigint_column2 | bigint | |
decimal_column1 | decimal(30,10) | |
decimal_column2 | decimal(36,10) | |
double_column1 | double | |
double_column2 | double | |
integer_column1 | integer | |
(12 rows)