External Data Source: Frontend and catalog changes

Initial frontend and catalog changes for external data sources.

Change-Id: Ia0e61ef97cfd7a4e138ef555c17f2e45bbf08c18
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2224
Reviewed-by: Matthew Jacobs <mj@cloudera.com>
Tested-by: jenkins
(cherry picked from commit dfa14c828957f751db9c89bae0bdc040ce6f648c)
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2485

testdata/bin/create-data-source-table.sql

@@ -0,0 +1,45 @@
+-- Copyright 2012 Cloudera Inc.
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+-- http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+
+-- Create test data sources and tables
+
+USE functional;
+
+DROP DATA SOURCE IF EXISTS AllTypesDataSource;
+CREATE DATA SOURCE AllTypesDataSource
+LOCATION '/test-warehouse/data-sources/test-data-source.jar'
+CLASS 'com.cloudera.impala.extdatasource.AllTypesDataSource'
+API_VERSION 'V1';
+
+DROP TABLE IF EXISTS alltypes_datasource;
+CREATE TABLE alltypes_datasource (
+  bool_col BOOLEAN,
+  tinyint_col TINYINT,
+  smallint_col SMALLINT,
+  int_col INT,
+  bigint_col BIGINT,
+  float_col FLOAT,
+  double_col DOUBLE,
+  timestamp_col TIMESTAMP,
+  string_col STRING)
+PRODUCED BY DATA SOURCE AllTypesDataSource("TestInitString");
+
+DROP TABLE IF EXISTS decimal_datasource;
+CREATE TABLE decimal_datasource (
+  d1 DECIMAL(9,0),
+  d2 DECIMAL(10,0),
+  d3 DECIMAL(20,10),
+  d4 DECIMAL(38,37),
+  d5 DECIMAL(10,5))
+PRODUCED BY DATA SOURCE AllTypesDataSource;