Issue with executing diff scripts.

Question

Hi,
I have an sql file which we run thru sqlplus. The file has list of scripts to be compiled. Now based on environment i wanna choose which script to be compiled. How should i achieve that?
schema_changes.sql file
def dw_user =&1
def env =&2
alter session set current_schema=&dw_user._staging;
@EDW/dbscripts/DW/SCHEMA/BUILD_DW_SCHEMA.SQL
@EDW/dbscripts/DW/SCHEMA/BUILD_DW_SCHEMA_QA.SQL
@EDW/dbscripts/DW/SCHEMA/STAGING_TRG.SQL
/If the user inputs env as QA, it should compile BUILD_DW_SCHEMA_QA.SQL or else it should compile BUILD_DW_SCHEMA.SQL. I'm not sure SQL block IF END IF will do as we have to have to execute scripts kept on server. Please advice.
Will the below work:
def dw_user =&1
def env =&2
alter session set current_schema=&dw_user._staging;
BEGIN
IF (env = 'QA') then
@EDW/dbscripts/DW/SCHEMA/BUILD_DW_SCHEMA_QA.SQL
ELSE
@EDW/dbscripts/DW/SCHEMA/BUILD_DW_SCHEMA_QA.SQL
END IF;
END;
@EDW/dbscripts/DW/SCHEMA/STAGING_TRG.SQL
/

Answer 1

GR wrote:
Hi,
I have an sql file which we run thru sqlplus. The file has list of scripts to be compiled. Now based on environment i wanna choose which script to be compiled. How should i achieve that?
schema_changes.sql file
def dw_user =&1
def env =&2
alter session set current_schema=&dw_user._staging;
@EDW/dbscripts/DW/SCHEMA/BUILD_DW_SCHEMA.SQL
@EDW/dbscripts/DW/SCHEMA/BUILD_DW_SCHEMA_QA.SQL
@EDW/dbscripts/DW/SCHEMA/STAGING_TRG.SQL
/If the user inputs env as QA, it should compile BUILD_DW_SCHEMA_QA.SQL or else it should compile BUILD_DW_SCHEMA.SQL. I'm not sure SQL block IF END IF will do as we have to have to execute scripts kept on server. Please advice.
Will the below work:
def dw_user =&1
def env =&2
alter session set current_schema=&dw_user._staging;
BEGIN
IF (env = 'QA') then
@EDW/dbscripts/DW/SCHEMA/BUILD_DW_SCHEMA_QA.SQL
ELSE
@EDW/dbscripts/DW/SCHEMA/BUILD_DW_SCHEMA_QA.SQL
END IF;
END;
@EDW/dbscripts/DW/SCHEMA/STAGING_TRG.SQL
No, that won't work, as you cannot embed SQL*Plus commands into the PL/SQL language, they are two seperate languages. PL/SQL does not support SQL*Plus commands.
What you are trying to achieve would be more easily implemented using operating system scripting languages, though the exact script would depend on whether you are using a Windows based o/s or Unix based o/s. The o/s script would be able to prompt for input from the user and has the ability to do conditional processing, thus you can get it to call SQL*Plus with the relevant scripts as the input.