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Top Forums Shell Programming and Scripting Pipe causing last command error to not function Post 302923506 by junior-helper on Monday 3rd of November 2014 11:09:47 AM
Old 11-03-2014
First of all, did you know that your log will only contain the standard output stream (stdout)?

Use yourscript $var 2>&1 | tee $LOG to capture the standard error (stderr) stream too. This might help you with the potential troubleshooting process.

In bash, there is a special internal array variable called $PIPESTATUS, which may work relatively reliable for the simple case you mention.

${PIPESTATUS[0]} should hold the exit status of the first command in the pipe.

Source: Internal Variables
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EXECUTE(7)							   SQL Commands 							EXECUTE(7)

NAME
EXECUTE - execute a prepared statement SYNOPSIS
EXECUTE name [ ( parameter [, ...] ) ] DESCRIPTION
EXECUTE is used to execute a previously prepared statement. Since prepared statements only exist for the duration of a session, the pre- pared statement must have been created by a PREPARE statement executed earlier in the current session. If the PREPARE statement that created the statement specified some parameters, a compatible set of parameters must be passed to the EXECUTE statement, or else an error is raised. Note that (unlike functions) prepared statements are not overloaded based on the type or number of their parameters; the name of a prepared statement must be unique within a database session. For more information on the creation and usage of prepared statements, see PREPARE [prepare(7)]. PARAMETERS
name The name of the prepared statement to execute. parameter The actual value of a parameter to the prepared statement. This must be an expression yielding a value that is compatible with the data type of this parameter, as was determined when the prepared statement was created. OUTPUTS
The command tag returned by EXECUTE is that of the prepared statement, and not EXECUTE. EXAMPLES
Examples are given in the Examples [prepare(7)] section of the PREPARE [prepare(7)] documentation. COMPATIBILITY
The SQL standard includes an EXECUTE statement, but it is only for use in embedded SQL. This version of the EXECUTE statement also uses a somewhat different syntax. SEE ALSO
DEALLOCATE [deallocate(7)], PREPARE [prepare(7)] SQL - Language Statements 2010-05-14 EXECUTE(7)
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