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https://reviews.apache.org/r/31825/
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Review request for hive, Brock Noland, Szehon Ho, and Xuefu Zhang.


Bugs: HIVE-9877
    https://issues.apache.org/jira/browse/HIVE-9877


Repository: hive-git


Description
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This patch is to enhance Beeline to be able to run multiple commands from a 
line which is passed in via beeline console, -e or -f. In addition, it also 
fixes an NPE when reading command from a file (via -f) if that line of command 
is not terminated by ";"


Diffs
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  beeline/src/java/org/apache/hive/beeline/Commands.java 
291adbab3b5fcb2335679a32b1f812f12358a491 

Diff: https://reviews.apache.org/r/31825/diff/


Testing
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Manual tests have been done and all passed.
1. Beeline console for following commands:
 a. use a ; show tables; -- beeline executes two commands and its console 
displays all tables under db a 
 b. use a ; show tables -- beeline console prompts for more input, after typing 
in ";" it executes two commands and displays tables under db a
 c. use a ;  show databases; show tables;"   -- beeline executes all three 
commands and its console displays all databases, and tables under db a
 d. use a ;  #show databases; show tables;"  -- beeline only executes "use a" 
command and skip rest cmds like "show databases" and "show tables"
 
2. commands passed in via -e option:
 a. -e "use a ; show tables; "
 b. -e "use a ; show tables" -- display tables under db a even without ; at the 
end of line
 c. -e "use a ;  show databases; show tables"   -- display all databases, and 
display tables under db a
 d. -e "use a ;  #show databases; show tables"  -- skip cmds show databases; 
show tables

3. commands read from a file via -f option, file includes following commands:
{code}
show databases; #display all databases;
use a; show tables;
use a; show databases; #show tables; #do not show databases;
#do not have the ; at the end of following cmd
show databases
{code}


Thanks,

Chaoyu Tang

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