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[moira.git] / backup / db2rest.awk
1 #       $Id$
2 #
3 #       This converts the file used to originally create the database
4 #       into a program to restore it from a backup.
5 #       This is not guaranteed to work for all data types; it may
6 #       need to be extended.
7
8 BEGIN {
9         print "/* This file automatically generated */";
10         print "/* Do not edit */\n";
11         print "EXEC SQL INCLUDE sqlca;";
12         print "EXEC SQL WHENEVER SQLERROR DO dbmserr();";
13         print "#include <com_err.h>";
14         print "#include \"dump_db.h\"";
15         print "#include \"rest.h\"";
16
17         print "/* This file automatically generated */" > "rest1.pc";
18         print "/* Do not edit */\n" >> "rest1.pc";
19         print "#include \"dump_db.h\"" >> "rest1.pc";
20         print "#include \"rest.h\"" >> "rest1.pc";
21         print "void do_restores(char *prefix)\n{" >> "rest1.pc";
22
23         print "/* This file automatically generated */" > "bkup.h";
24         print "/* Do not edit */\n" >> "bkup.h";
25 }
26
27 $1=="#" { next; }
28
29 /^create/ {
30         printf "void restore_%s(FILE *f)\n", $3;
31         print "{\n  EXEC SQL BEGIN DECLARE SECTION;";
32         printf "  restore_%s(open_file(prefix, \"%s\"));\n", $3, $3 >> "rest1.pc";
33         printf "void restore_%s(FILE *f);\n", $3 >> "rest.h";
34
35         tablename = $3;
36         rangename = substr(tablename, 1, 1);
37         count = 0;
38         next;
39 }
40
41 NF >= 2 {
42         vname[count] = $1;
43         printf "  /* %s */\n", $0;
44         if ($2 ~ /INTEGER/ || $2 ~ /SMALLINT/ || $2 ~ /INTEGER1/) {
45                 printf "  char\tt_%s[39];\n", vname[count];
46                 vtype[count]="int";
47         } else if ($2 ~ /CHAR\([0-9]*\)/) {
48                 t = split($2, temp, "(");
49                 if (t != 2) printf "Can't parse %s\n", $2;
50                 t = split(temp[2], temp2, ")");
51                 if (t != 2) printf "Can't parse %s\n", temp[2];
52                 printf "  char\tt_%s[%d];\n", vname[count], temp2[1]+1;
53                 if ($1 == "signature" || $1 == "sid") {
54                         vtype[count]="bin";
55                         printf "  EXEC SQL VAR t_%s IS STRING(%d);\n", vname[count], temp2[1]+1;
56                 } else vtype[count]="str";
57                 vsize[count] = temp2[1]+1;
58         } else if ($2 ~ /DATE/) {
59                 printf "  char\tt_%s[26];\n", vname[count];
60                 vtype[count]="date";
61         } else printf "Unknown data type %s\n", $2;
62         count++;
63 }
64
65 /^\);$/ {
66         printf "  EXEC SQL END DECLARE SECTION;\n\n  int count = 0;\n";
67
68         print "  while (!feof(f))\n    {";
69         print "      if (!(++count % 100))\n        EXEC SQL COMMIT;\n";
70
71         for (i = 0; i < count; i++) {
72                 if (i != 0) print "      parse_sep(f);";
73                 if (vtype[i] ~ /int/) {
74                         printf("      parse_str(f, t_%s, 39);\n", vname[i]);
75                 } else if (vtype[i] ~ /date/) {
76                         printf "      parse_str(f, t_%s, 26);\n", vname[i];
77                 } else {
78                         printf "      parse_str(f, t_%s, %d);\n", vname[i], vsize[i];
79                 }
80                 if (i == 0) print "      if (feof(f))\n        break;";
81         }
82         printf "      parse_nl(f);\n"
83
84         printf "      EXEC SQL INSERT INTO %s (\n", tablename;
85         for (i = 0; i < count; i++) {
86                 if (i != 0) printf ",\n";
87                 printf "          %s", vname[i];
88         }
89         printf ")\n        VALUES (\n";
90         for (i = 0; i < count; i++) {
91                 if (i != 0) printf ",\n";
92                 if (vtype[i] ~ /date/) {
93                         printf "          TO_DATE(NVL(:t_%s,TO_CHAR(SYSDATE, 'DD_mon-YYYY HH24:MI:SS')), 'DD-mon-YYYY HH24:MI:SS')", vname[i];
94                 } else if(vtype[i] ~ /int/) {
95                         printf "          TO_NUMBER(:t_%s)", vname[i];
96                 } else {
97                         printf "          NVL(:t_%s,CHR(0))", vname[i];
98                 }
99         }
100         printf ");\n      if (sqlca.sqlcode != 0)\n        {\n";
101         printf "          sqlca.sqlerrm.sqlerrmc[sqlca.sqlerrm.sqlerrml] = 0;\n";
102         printf "          printf(\"%%s\\n\", sqlca.sqlerrm.sqlerrmc);\n";
103         printf "          com_err(\"restore\", 0, \"insert failed\");\n";
104         printf "          exit(2);\n        }\n    }\n";
105         printf "  fclose(f);\n";
106         printf "  EXEC SQL COMMIT;\n";
107         printf "}\n\n";
108 }
109
110
111 END {
112         print "/* All done */";
113         print "}" >> "rest1.pc";
114 }
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