Generating DDL from ResultSetMetaData

Question

Hi, I'm new to this forum although you can occasionally spot me on some of the other forums at java.sun.com. So if this is not the correct place for my question, I would appreciate a pointer to a more appropriate location.. -- Thanks
I was wondering if anyone knew of a utility to create a DDL from a ResultSetMetaData. I'm sure I could develop one with some time, but it's for a one-off project. There is a huge Stored Procedure that someone else is going to analyze for performance. But it's speed is slowing down my testing, and I would like to create a temporary table with the results from that SP, but I don't want to manually format the hundreds of columns involved. The information needed to create the table is clearly stored in the ResultSetMetaData associated with a call to the StoredProcedure, but I don't know any way to convert that into some sort of script.
Any suggestions?
This is on SQL Server, and I'm not particularly familiar with it, so if anyone knows a native trick for this DBMS, that would be appreciated too.
Thanks,
-- Scott

Answer 1

Never mind. I got it. When I came back to this after lunch, I realized both that this would likely not be a one-off, and that it shouldn't be too hard for my limited needs. The code I used is below. This is specific to SQL Server, and only to a limited number of data types, but it would be easy to extend to other's simple needs. I'm sure there are robust versions easily available, but I didn't find them. In the following code, rs is a ResultSet:
        ResultSetMetaData rsmd = rs.getMetaData();
        int colCount = rsmd.getColumnCount();
        System.out.println("IF EXISTS (SELECT * FROM dbo.sysobjects WHERE" +
                " id = object_id(N'[dbo].["
            + tableName + "]') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)");
        System.out.println("DROP TABLE [dbo].[" + tableName + "]");
        System.out.println("GO");
        System.out.println();
        System.out.println("CREATE TABLE [dbo].[" + tableName + "] (");
        for(int i = 1; i <= colCount; i++) {
            String type = rsmd.getColumnTypeName(i);
            System.out.print("\t" + ((i > 1) ? "[" : ""));
            System.out.print(rsmd.getColumnName(i) + ((i > 1) ? "]  [" : "  "));
            System.out.print(type + ((i > 1) ? "] " : " "));
            if (type.equals("varchar") || type.equals("char")) {
                System.out.print("(" + rsmd.getPrecision(i) + ") ");
            } else if (type.equals("decimal")) {
                System.out.print("(" + rsmd.getPrecision(i) + ", " + rsmd.getScale(i) + ") ");
            } else if (!(type.equals("uniqueidentifier")
                        || type.equals("datetime") || type.equals("int"))) {
                throw new IllegalArgumentException(
                        "stupid DDL generator can't handle type \"" + type + "\".");
            int nullableInt = rsmd.isNullable(i);
            if (nullableInt == ResultSetMetaData.columnNoNulls) {
                System.out.print("NOT NULL");
            } else if (nullableInt == ResultSetMetaData.columnNullable) {
                System.out.print("NULL");
            if (i < colCount) {
                System.out.print(" ,");
            System.out.println();
        System.out.println(")");
        System.out.println("GO");
        System.out.println();
        while(rs.next()) {
            System.out.print("INSERT INTO " + tableName + " VALUES (");
            for(int i = 1; i <= colCount; i++) {
                String type = rsmd.getColumnTypeName(i);
                boolean quoted = (type.equals("char") || type.equals("varchar") ||
                         type.equals("uniqueidentifier") || type.equals("datetime"));
                if (i > 1) System.out.print(",");
                Object temp = rs.getObject(i);
                String value = (temp == null) ? "NULL" : temp.toString();
                if (quoted && temp != null) {
                    System.out.print("'");
                System.out.print(value);
                if (quoted && temp != null) {
                    System.out.print("'");
            System.out.println(");");
        }I know this is far from elegant, and too specific to my small problem, but anyone who needs something similar should be able to modify it rather easily.
-- Scott