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Full Discussion: ORA-00904: invalid identifier
Top Forums UNIX for Dummies Questions & Answers ORA-00904: invalid identifier Post 302938917 by durden_tyler on Friday 20th of March 2015 04:20:41 AM
Old 03-20-2015
Quote:
Originally Posted by gmatcat
... I want to be able to know if the table exists, if it doesn't, create it. ...
#bin/ksh

OUTPUT=$(sqlplus -s ABC31/ABC31@ALPHA01 << EOF
set echo off feed off heading off tab off pagesize 0 trimspool on linesize 500
SELECT COUNT(*) from tab where tname = 'SAMPLE_TABLE';
exit;
EOF)


echo $OUTPUT

ORA-00904: "SAMPLE_TABLE": invalid identifier
Code:
$
$
$ cat -n create_table_if_needed.sh
     1  #!/usr/bin/ksh
     2  OUTPUT=$(sqlplus -s test/test@test << EOF
     3  set echo off feed off heading off tab off pagesize 0 trimspool on linesize 500 time off timing off
     4  declare
     5      v_message  varchar2(40) := 'Table did not exist and was created.';
     6  begin
     7      select 'Table exists.'
     8        into v_message
     9        from tab
    10       where tname = 'SAMPLE_TABLE' ;
    11       dbms_output.put_line(v_message);
    12  exception
    13      when no_data_found then
    14          execute immediate 'create table sample_table ( x number, y varchar2(1) )';
    15          dbms_output.put_line(v_message);
    16  end;
    17  /
    18  exit;
    19  EOF)
    20
    21  echo $OUTPUT
    22
$
$ ./create_table_if_needed.sh
Table did not exist and was created.
$
$ ./create_table_if_needed.sh
Table exists.
$
$ ./create_table_if_needed.sh
Table exists.
$
$

 

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LEARN ABOUT OPENSOLARIS

getusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

	 /bin/bash		    /bin/csh
	 /bin/jsh		    /bin/ksh
	 /bin/ksh93		    /bin/pfcsh
	 /bin/pfksh		    /bin/pfsh
	 /bin/sh		    /bin/tcsh
	 /bin/zsh		    /sbin/jsh
	 /sbin/pfsh		    /sbin/sh
	 /usr/bin/bash		    /usr/bin/csh
	 /usr/bin/jsh		    /usr/bin/ksh
	 /usr/bin/ksh93 	    /usr/bin/pfcsh
	 /usr/bin/pfksh 	    /usr/bin/pfsh
	 /usr/bin/sh		    /usr/bin/tcsh
	 /usr/bin/zsh		    /usr/sfw/bin/zsh
	 /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

NOTES

       Restricted shells should not be listed in /etc/shells.

SunOS 5.11							    1 Nov 2007							  getusershell(3C)
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