04-10-2009
Creating flat file using SQLPLUS from UNIX Shell Script
I tried in command line also. I am getting the same thing again.
I executed the same sql query from command line. It's giving the output. but the flat file contains does not have any data.
The output flat file contains data as below
Usage: SQLPLUS [ [<option>] [<logon>] [<start>] ] where <option> ::= -H | -V | [ [-L] [-M <o>] [-R <n>] [-S] ]
<logon> ::= <username>[/<password>][@<connect_string>] | / | /NOLOG
<start> ::= @<URI>|<filename>[.<ext>] [<parameter> ...]
"-H" displays the SQL*Plus version banner and usage syntax
"-V" displays the SQL*Plus version banner
"-L" attempts log on just once
"-M <o>" uses HTML markup options <o>
"-R <n>" uses restricted mode <n>
"-S" uses silent mode
Pls help me to solve this problem.
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ECPG(1) PostgreSQL Client Applications ECPG(1)
NAME
ecpg - embedded SQL C preprocessor
SYNOPSIS
ecpg [ option... ] file...
DESCRIPTION
ecpg is the embedded SQL preprocessor for C programs. It converts C programs with embedded SQL statements to normal C code by replacing the
SQL invocations with special function calls. The output files can then be processed with any C compiler tool chain.
ecpg will convert each input file given on the command line to the corresponding C output file. Input files preferrably have the extension
.pgc, in which case the extension will be replaced by .c to determine the output file name. If the extension of the input file is not .pgc,
then the output file name is computed by appending .c to the full file name. The output file name can also be overridden using the -o
option.
This reference page does not describe the embedded SQL language. See the PostgreSQL Programmer's Guide for that.
OPTIONS
ecpg accepts the following command-line arguments:
-c Automatically generate C code from SQL code. Currently, this works for EXEC SQL TYPE.
-D symbol
Define a C preprocessor symbol.
-I directory
Specify an additional include path, used to find files included via EXEC SQL INCLUDE. Defaults are . (current directory),
/usr/local/include, the PostgreSQL include directory which is defined at compile time (default: /usr/local/pgsql/include), and
/usr/include, in that order.
-o filename
Specifies that ecpg should write all its output to the given filename.
-t Turn on autocommit of transactions. In this mode, each query is automatically committed unless it is inside an explicit transaction
block. In the default mode, queries are committed only when EXEC SQL COMMIT is issued.
-v Print additional information including the version and the include path.
---help
Show a brief summary of the command usage, then exit.
--version
Output version information, then exit.
NOTES
When compiling the preprocessed C code files, the compiler needs to be able to find the ECPG header files in the PostgreSQL include direc-
tory. Therefore, one might have to use the -I option when invoking the compiler (e.g., -I/usr/local/pgsql/include).
Programs using C code with embedded SQL have to be linked against the libecpg library, for example using the flags -L/usr/local/pgsql/lib
-lecpg.
The value of either of these directories that is appropriate for the installation can be found out using pg_config(1).
EXAMPLES
If you have an embedded SQL C source file named prog1.pgc, you can create an executable program using the following sequence of commands:
ecpg prog1.pgc
cc -I/usr/local/pgsql/include -c prog1.c
cc -o prog1 prog1.o -L/usr/local/pgsql/lib -lecpg
SEE ALSO
PostgreSQL Programmer's Guide for a more detailed description of the embedded SQL interface
Application 2002-11-22 ECPG(1)