BTEQ script in Shell Script


 
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# 1  
Old 10-29-2018
BTEQ script in Shell Script

Hi Team,

I have a requirement where I need to check for table. If exists, drop it else do nothing. For that I written below code.



Code:
T_NAME="V_"`echo ${PARAM_BASE} | cut -d'_' -f4-` 

tab_name="UV_"${T_NAME} 

query_et() 

{ 

bteq << EOBTQ | grep '^>' | sed -e "s/^>//" 

.LOGON DEVEDW1/<username>,<password>; 

SELECT count(*) from dbc.tables where databasename = '${SCHE_NAME}' and tablename = '${tab_name}' having count(*) > 0; 

.IF ERRORCODE <> 0 THEN .QUIT 10;  

.IF ACTIVITYCOUNT = 1 THEN .GOTO DROP_TAB;  

.LABEL DROP_TAB;  

DROP TABLE ${SCHE_NAME}.${tab_name}; 

.LOGOFF 

.QUIT; 

EOBTQ 

}



The problem is, even if table does not exists, it goes to DROP statement... I do not understand why it goes there even after I put ACTIV ITY COUNT = 1. Can someonne please help me to figure out the problem?
# 2  
Old 10-30-2018
Where are SCHE_NAME and PARAM_BASE being set?
# 3  
Old 10-30-2018
At the top of the script. Issue is

Code:
SELECT count(*) from dbc.tables where databasename = '${SCHE_NAME}' and tablename = '${tab_name}' having count(*) > 0;


returns null. I have given
Code:
.IF ACTIVITYCOUNT = 1 THEN .GOTO DROP_TAB;

BUT still it goes to

Code:
DROP TABLE ${SCHE_NAME}.${tab_name};

# 4  
Old 10-30-2018
In:
Code:
SELECT count(*) from dbc.tables where databasename = '${SCHE_NAME}' and tablename = '${tab_name}'

shell variables are not expanded inside single quotes. Try:
Code:
SELECT count(*) from dbc.tables where databasename = "${SCHE_NAME}" and tablename = "${tab_name}"

but, even then, as Scrutinizer said, SCHE_NAME has to be defined before it is expanded in your script.
# 5  
Old 10-30-2018
That is not the issue. Code is working fine if table exists. BUT if table does not exists, it still goes to drop it, which I do not want it to do.
# 6  
Old 10-30-2018
Not sure if my logic fails me but to me that snippet as given reads "if activity then goto drop_table else goto drop_table". Please prove me wrong.
# 7  
Old 10-30-2018
Rudic, what chage you are suggesting in order to make it work?
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