missed a file (schema program from Karl)

2025-09-18 18:22:07 +08:00 · 2000-03-12 01:22:10 +00:00
parent ed04cfac15
commit 951838d3e9
1 changed files with 102 additions and 0 deletions
--- a/src/util/schema.c
+++ b/src/util/schema.c
@@ -0,0 +1,102 @@
+/* MDB Tools - A library for reading MS Access database file
+ * Copyright (C) 2000 Brian Bruns
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/* this utility dumps the schema for an existing database */
+
+#include "mdbtools.h"
+
+main (int argc, char **argv)
+{
+int   i, j, k;
+MdbHandle *mdb;
+MdbCatalogEntry entry;
+MdbTableDef *table;
+MdbColumn col;
+
+ if (argc < 2) {
+   fprintf (stderr, "Usage: schema <file>\n");
+   exit (1);
+ }
+ 
+ /* open the database */
+
+ mdb = mdb_open (argv[1]);
+
+ /* read the catalog */
+ 
+ mdb_read_catalog (mdb, MDB_TABLE);
+
+ /* loop over each entry in the catalog */
+
+ for (i=0; i < mdb->num_catalog; i++) 
+   {
+     entry = g_array_index (mdb->catalog, MdbCatalogEntry, i);
+
+     /* if it's a table */
+
+     if (entry.object_type == MDB_TABLE)
+       {
+	 /* skip the MSys tables */
+       if (strncmp (entry.object_name, "MSys", 4))
+	 {
+	   
+	   /* make sure it's a table (may be redundant) */
+
+	   if (!strcmp (mdb_get_objtype_string (entry.object_type), "Table"))
+	     {
+	       /* drop the table if it exists */
+	       fprintf (stdout, "DROP TABLE %s;\n", entry.object_name);
+
+	       /* create the table */
+	       fprintf (stdout, "CREATE TABLE %s\n", entry.object_name);
+	       fprintf (stdout, " (\n");
+	       	       
+	       table = mdb_read_table (&entry);
+
+	       /* get the columns */
+	       mdb_read_columns (table);
+
+	       /* loop over the columns, dumping the names and types */
+
+	       for (k = 0; k < table->num_cols; k++)
+		 {
+		   col = g_array_index (table->columns, MdbColumn, k);
+		   
+		   fprintf (stdout, "\t%s\t\t\t%s", col.name, 
+			    mdb_get_coltype_string (col.col_type));
+		   
+		   if (col.col_size != 0)
+		     fprintf (stdout, " (%d)", col.col_size);
+		   
+		   if (k < table->num_cols - 1)
+		     fprintf (stdout, ", \n");
+		   else
+		     fprintf (stdout, "\n");
+		 }
+
+	       fprintf (stdout, "\n);\n");
+	       fprintf (stdout, "-- CREATE ANY INDEXES ...\n");
+	       fprintf (stdout, "\n");
+	     }
+	 }
+     }
+   }
+ 
+ mdb_free_handle (mdb);
+}
+