SQL translation

[moira.git] / backup / db2bkup.awk

#	$Source$
#	$Header$
#
#	This converts the file used to originally create the database
#	into a program to back it up.
#	This is not guaranteed to work for all data types; it may
#	need to be extended.

BEGIN { print "/* This file automatically generated */";
	print "/* Do not edit */";
	print "#include <stdio.h>";
	print "EXEC SQL INCLUDE sqlca;";
	print "#include \"dump_db.h\"";
	print;
	print "/* This file automatically generated */" > "bkup1.dc";
	print "/* Do not edit */" >> "bkup1.dc"
	print "#include <stdio.h>" >> "bkup1.dc"
	print "FILE *open_file();" >> "bkup1.dc"
	print "do_backups(prefix)\n\tchar *prefix;\n{" >>"bkup1.dc"
}

$1=="#" { next; }

/^create/ { printf "dump_%s(f)\nFILE *f;\n{\n\tEXEC SQL BEGIN DECLARE SECTION;\n", $3;
	printf "\tdump_%s(open_file(prefix, \"%s\"));\n", $3, $3 >> "bkup1.dc"
	tablename = $3;
	rangename = substr(tablename, 1, 1);
	count = 0;
	next;}

NF>=2 {
	vname[count] = $1; 
	printf "/* %s */\n", $0
	if ($2 ~ /INTEGER/ || $2 ~ /SMALLINT/ || $2 ~ /INTEGER1/) {
		printf "\tint\tt_%s;\n", vname[count]
		vtype[count]="int"
	} else if ($2 ~ /CHAR\([0-9]*\)/) {
		t = split($2, temp, "(")
		if (t != 2) printf "Can't parse %s\n", $2;
		t = split(temp[2], temp2, ")")
		if (t != 2) printf "Can't parse %s\n", temp[2];
		printf "\tchar\tt_%s[%d];\n", vname[count], temp2[1]+1;
		vtype[count]="str"
	} else if ($2 ~ /DATE/) {
		printf "\tchar\tt_%s[26];\n", vname[count]
		vtype[count]="str"
	} else printf "Unknown data type %s\n", $2;
	count++;
}

/^\);$/ { 
	printf "\tEXEC SQL END DECLARE SECTION;\n";
	printf "\tEXEC SQL DECLARE c_%s CURSOR FOR\n", tablename;
	printf "\t\tSELECT * FROM %s;\n", tablename;
	printf "\tEXEC SQL OPEN c_%s;\n", tablename;
	printf "\twhile(1) {\n\tEXEC SQL FETCH c_%s INTO\n", tablename;
	for (i = 0; i < count; i++) {
		if (i != 0) printf ",\n";
		printf "\t\t:t_%s", vname[i];
	}
	printf ";\n";
	printf "\tif(sqlca.sqlcode != 0) break;\n";
	for (i = 0; i < count; i++) {
		if (i != 0) print "\tdump_sep(f);"
		printf "\tdump_%s(f, t_%s);\n", vtype[i], vname[i];
	}
	printf "\t\tdump_nl(f);\n";
	printf "\t}\n";
	printf "\tEXEC SQL CLOSE c_%s;\n", tablename;
	printf "\tsafe_close(f);\n";
	printf "}\n";
}
END { print "/* All done */"
	print "}" >>"bkup1.dc"
}