Attached is a patch to fix the current issues with building under jdbc1.

This patch moves the logic that looks up TypeOid, PGTypeName, and
SQLTypeName from Field to Connection.  It is moved to connection since
it needs to differ from the jdbc1 to jdbc2 versions and Connection
already has different subclasses for the two driver versions.  It also
made sense to move the logic to Connection as some of the logic was
already there anyway.

Barry Lind

src/interfaces/jdbc/org/postgresql/Connection.java

@@ -11,7 +11,7 @@ import org.postgresql.util.*;
 import org.postgresql.core.Encoding;
 
 /**
- * $Id: Connection.java,v 1.25 2001/08/10 14:42:07 momjian Exp $
+ * $Id: Connection.java,v 1.26 2001/08/24 16:50:12 momjian Exp $
  *
  * This abstract class is used by org.postgresql.Driver to open either the JDBC1 or
  * JDBC2 versions of the Connection class.
@@ -69,11 +69,10 @@ public abstract class Connection
   // New for 6.3, salt value for crypt authorisation
   private String salt;
 
-  // This is used by Field to cache oid -> names.
-  // It's here, because it's shared across this connection only.
-  // Hence it cannot be static within the Field class, because it would then
-  // be across all connections, which could be to different backends.
-  public Hashtable fieldCache = new Hashtable();
+  // These are used to cache oids, PGTypes and SQLTypes
+  private static Hashtable sqlTypeCache = new Hashtable();  // oid -> SQLType
+  private static Hashtable pgTypeCache = new Hashtable();  // oid -> PGType
+  private static Hashtable typeOidCache = new Hashtable();  //PGType -> oid
 
   // Now handle notices as warnings, so things like "show" now work
   public SQLWarning firstWarning = null;
@@ -1108,5 +1107,86 @@ public abstract class Connection
   {
       return (getDBVersionNumber().compareTo(ver) >= 0);
   }
+
+
+  /**
+   * This returns the java.sql.Types type for a PG type oid
+   *
+   * @param oid PostgreSQL type oid
+   * @return the java.sql.Types type
+   * @exception SQLException if a database access error occurs
+   */
+  public int getSQLType(int oid) throws SQLException
+  {
+    Integer sqlType = (Integer)typeOidCache.get(new Integer(oid));
+
+    // it's not in the cache, so perform a query, and add the result to the cache
+    if(sqlType==null) {
+      ResultSet result = (org.postgresql.ResultSet)ExecSQL("select typname from pg_type where oid = " + oid);
+      if (result.getColumnCount() != 1 || result.getTupleCount() != 1)
+        throw new PSQLException("postgresql.unexpected");
+      result.next();
+      String pgType = result.getString(1);
+      Integer iOid = new Integer(oid);
+      sqlType = new Integer(getSQLType(result.getString(1)));
+      sqlTypeCache.put(iOid,sqlType);
+      pgTypeCache.put(iOid,pgType);
+      result.close();
+    }
+
+    return sqlType.intValue();
+  }
+
+  /**
+   * This returns the java.sql.Types type for a PG type
+   *
+   * @param pgTypeName PostgreSQL type name
+   * @return the java.sql.Types type
+   */
+  public abstract int getSQLType(String pgTypeName);
+
+  /**
+   * This returns the oid for a given PG data type
+   * @param typeName PostgreSQL type name
+   * @return PostgreSQL oid value for a field of this type
+   */
+  public int getOID(String typeName) throws SQLException
+  {
+        int oid = -1;
+        if(typeName != null) {
+          Integer oidValue = (Integer) typeOidCache.get(typeName);
+          if(oidValue != null) {
+            oid = oidValue.intValue();
+          } else {
+            // it's not in the cache, so perform a query, and add the result to the cache
+            ResultSet result = (org.postgresql.ResultSet)ExecSQL("select oid from pg_type where typname='"
+                                + typeName + "'");
+            if (result.getColumnCount() != 1 || result.getTupleCount() != 1)
+              throw new PSQLException("postgresql.unexpected");
+            result.next();
+            oid = Integer.parseInt(result.getString(1));
+            typeOidCache.put(typeName, new Integer(oid));
+            result.close();
+          }
+        }
+        return oid;
+  }
+
+  /**
+   * We also need to get the PG type name as returned by the back end.
+   *
+   * @return the String representation of the type of this field
+   * @exception SQLException if a database access error occurs
+   */
+  public String getPGType(int oid) throws SQLException
+  {
+    String pgType = (String) pgTypeCache.get(new Integer(oid));
+    if(pgType == null) {
+      getSQLType(oid);
+      pgType = (String) pgTypeCache.get(new Integer(oid));
+    }
+    return pgType;
+  }
+
 }