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diff --git a/doc/src/sgml/man1/ecpg.1 b/doc/src/sgml/man1/ecpg.1 new file mode 100644 index 0000000..727866d --- /dev/null +++ b/doc/src/sgml/man1/ecpg.1 @@ -0,0 +1,208 @@ +'\" t +.\" Title: ecpg +.\" Author: The PostgreSQL Global Development Group +.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/> +.\" Date: 2024 +.\" Manual: PostgreSQL 16.2 Documentation +.\" Source: PostgreSQL 16.2 +.\" Language: English +.\" +.TH "ECPG" "1" "2024" "PostgreSQL 16.2" "PostgreSQL 16.2 Documentation" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +ecpg \- embedded SQL C preprocessor +.SH "SYNOPSIS" +.HP \w'\fBecpg\fR\ 'u +\fBecpg\fR [\fIoption\fR...] \fIfile\fR... +.SH "DESCRIPTION" +.PP +\fBecpg\fR +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\&. +.PP +\fBecpg\fR +will convert each input file given on the command line to the corresponding C output file\&. If an input file name does not have any extension, +\&.pgc +is assumed\&. The file\*(Aqs extension will be replaced by +\&.c +to construct the output file name\&. But the output file name can be overridden using the +\fB\-o\fR +option\&. +.PP +If an input file name is just +\-, +\fBecpg\fR +reads the program from standard input (and writes to standard output, unless that is overridden with +\fB\-o\fR)\&. +.PP +This reference page does not describe the embedded SQL language\&. See +Chapter\ \&36 +for more information on that topic\&. +.SH "OPTIONS" +.PP +\fBecpg\fR +accepts the following command\-line arguments: +.PP +\fB\-c\fR +.RS 4 +Automatically generate certain C code from SQL code\&. Currently, this works for +EXEC SQL TYPE\&. +.RE +.PP +\fB\-C \fR\fB\fImode\fR\fR +.RS 4 +Set a compatibility mode\&. +\fImode\fR +can be +INFORMIX, +INFORMIX_SE, or +ORACLE\&. +.RE +.PP +\fB\-D \fR\fB\fIsymbol\fR\fR +.RS 4 +Define a C preprocessor symbol\&. +.RE +.PP +\fB\-h\fR +.RS 4 +Process header files\&. When this option is specified, the output file extension becomes +\&.h +not +\&.c, and the default input file extension is +\&.pgh +not +\&.pgc\&. Also, the +\fB\-c\fR +option is forced on\&. +.RE +.PP +\fB\-i\fR +.RS 4 +Parse system include files as well\&. +.RE +.PP +\fB\-I \fR\fB\fIdirectory\fR\fR +.RS 4 +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\&. +.RE +.PP +\fB\-o \fR\fB\fIfilename\fR\fR +.RS 4 +Specifies that +\fBecpg\fR +should write all its output to the given +\fIfilename\fR\&. Write +\-o \- +to send all output to standard output\&. +.RE +.PP +\fB\-r \fR\fB\fIoption\fR\fR +.RS 4 +Selects run\-time behavior\&. +\fIOption\fR +can be one of the following: +.PP +\fBno_indicator\fR +.RS 4 +Do not use indicators but instead use special values to represent null values\&. Historically there have been databases using this approach\&. +.RE +.PP +\fBprepare\fR +.RS 4 +Prepare all statements before using them\&. Libecpg will keep a cache of prepared statements and reuse a statement if it gets executed again\&. If the cache runs full, libecpg will free the least used statement\&. +.RE +.PP +\fBquestionmarks\fR +.RS 4 +Allow question mark as placeholder for compatibility reasons\&. This used to be the default long ago\&. +.RE +.RE +.PP +\fB\-t\fR +.RS 4 +Turn on autocommit of transactions\&. In this mode, each SQL command is automatically committed unless it is inside an explicit transaction block\&. In the default mode, commands are committed only when +\fBEXEC SQL COMMIT\fR +is issued\&. +.RE +.PP +\fB\-v\fR +.RS 4 +Print additional information including the version and the "include" path\&. +.RE +.PP +\fB\-\-version\fR +.RS 4 +Print the +ecpg +version and exit\&. +.RE +.PP +\fB\-?\fR +.br +\fB\-\-help\fR +.RS 4 +Show help about +ecpg +command line arguments, and exit\&. +.RE +.SH "NOTES" +.PP +When compiling the preprocessed C code files, the compiler needs to be able to find the +ECPG +header files in the +PostgreSQL +include directory\&. Therefore, you might have to use the +\fB\-I\fR +option when invoking the compiler (e\&.g\&., +\-I/usr/local/pgsql/include)\&. +.PP +Programs using C code with embedded SQL have to be linked against the +libecpg +library, for example using the linker options +\-L/usr/local/pgsql/lib \-lecpg\&. +.PP +The value of either of these directories that is appropriate for the installation can be found out using +\fBpg_config\fR(1)\&. +.SH "EXAMPLES" +.PP +If you have an embedded SQL C source file named +prog1\&.pgc, you can create an executable program using the following sequence of commands: +.sp +.if n \{\ +.RS 4 +.\} +.nf +ecpg prog1\&.pgc +cc \-I/usr/local/pgsql/include \-c prog1\&.c +cc \-o prog1 prog1\&.o \-L/usr/local/pgsql/lib \-lecpg +.fi +.if n \{\ +.RE +.\} + |