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Top Forums Shell Programming and Scripting Calling SQL LDR and SQL plus scripts in a shell script Post 302143946 by gus2000 on Monday 5th of November 2007 01:31:04 PM
Old 11-05-2007
Using the "here document"

Using a "here" document would essentially be the same as using a long string. These are equivalent:

Code:
print "query1
query2
query3" | sqlplus

Code:
cat <<-\EOF | sqlplus
         query1
         query2
         query3
EOF

Code:
print "query1" | sqlplus
print "query2" | sqlplus
print "query3" | sqlplus

Either of the first two should be more efficient than the last. Take this example:


Code:
# This takes a long time (20-30 sec)
i=0
time while (((i+=1)<100)); do
    rsh localhost date;
done

# This is fast!  1 second!
cat <<-\EOF | rsh localhost sh
                i=0
                while (((i+=1)<100)); do
                        date
                done
                EOF

Since I use "-\EOF", the dash "-" removes any leading tabs from each line. The backslash "\" prevents all the text from being evaluated, and without it I would need to escape any special characters.
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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