Patch from Cormac Twomey

fixes getIndexInfo throwing NullPointerException
fixes getIndexInfo improper results when multiple key indexs are used

Author: Dave Cramer

src/interfaces/jdbc/org/postgresql/jdbc1/DatabaseMetaData.java

@@ -13,7 +13,7 @@
 /*
  * This class provides information about the database as a whole.
  *
- * $Id: DatabaseMetaData.java,v 1.41 2002/01/18 17:21:51 davec Exp $
+ * $Id: DatabaseMetaData.java,v 1.42 2002/02/22 02:40:09 davec Exp $
  *
  * <p>Many of the methods here return lists of information in ResultSets.  You
  * can use the normal ResultSet methods such as getString and getInt to
@@ -2791,13 +2791,14 @@ public java.sql.ResultSet getIndexInfo(String catalog, String schema, String tab
 			{
 				columnOrdinals[o++] = Integer.parseInt(stok.nextToken());
 			}
+			java.sql.ResultSet columnNameRS = connection.ExecSQL("select a.attname FROM pg_attribute a WHERE a.attrelid = " + r.getInt(9));
 			for (int i = 0; i < columnOrdinals.length; i++)
 			{
 				byte [] [] tuple = new byte [13] [];
 				tuple[0] = "".getBytes();
 				tuple[1] = "".getBytes();
 				tuple[2] = r.getBytes(1);
-				tuple[3] = r.getBoolean(2) ? "f".getBytes() : "t".getBytes();
+				tuple[3] = r.getBoolean(2) ? "false".getBytes() : "true".getBytes();
 				tuple[4] = null;
 				tuple[5] = r.getBytes(3);
 				tuple[6] = r.getBoolean(4) ?
@@ -2806,9 +2807,14 @@ public java.sql.ResultSet getIndexInfo(String catalog, String schema, String tab
 						   Integer.toString(tableIndexHashed).getBytes() :
 						   Integer.toString(tableIndexOther).getBytes();
 				tuple[7] = Integer.toString(i + 1).getBytes();
-				java.sql.ResultSet columnNameRS = connection.ExecSQL("select a.attname FROM pg_attribute a WHERE (a.attnum = " + columnOrdinals[i] + ") AND (a.attrelid = " + r.getInt(9) + ")");
-				columnNameRS.next();
-				tuple[8] = columnNameRS.getBytes(1);
+				if (columnNameRS.next())
+				{
+					tuple[8] = columnNameRS.getBytes(1);
+				}
+				else
+				{
+					tuple[8] = "".getBytes();
+				}
 				tuple[9] = null;  // sort sequence ???
 				tuple[10] = r.getBytes(7);	// inexact
 				tuple[11] = r.getBytes(8);