跨多个数据源的J2EE开发: 细节探讨 - 编程入门网
作者 佚名技术
来源 NET编程
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发布时间 2012-06-17
| ltER COLUMN c_nationkey LOCAL TYPE integer; ALTER NICKNAME odbc_customer altER COLUMN c_phone LOCAL TYPE char(15); ALTER NICKNAME odbc_customer altER COLUMN c_acctbal LOCAL TYPE decimal(10,4); ALTER NICKNAME odbc_customer altER COLUMN c_mktsegment LOCAL TYPE char(10); ALTER NICKNAME odbc_customer altER COLUMN c_comment LOCAL TYPE varchar(117); -- ALTER NICKNAME odbc_partsupp altER COLUMN ps_partkey LOCAL TYPE integer; ALTER NICKNAME odbc_partsupp altER COLUMN ps_suppkey LOCAL TYPE integer; ALTER NICKNAME odbc_partsupp altER COLUMN ps_availqty LOCAL TYPE integer; ALTER NICKNAME odbc_partsupp altER COLUMN ps_supplycost LOCAL TYPE decimal(10,4); ALTER NICKNAME odbc_partsupp altER COLUMN ps_comment LOCAL TYPE varchar(199); -- ALTER NICKNAME odbc_nation altER COLUMN n_nationkey LOCAL TYPE integer; ALTER NICKNAME odbc_nation altER COLUMN n_name LOCAL TYPE char(25); ALTER NICKNAME odbc_nation altER COLUMN n_regionkey LOCAL TYPE integer; ALTER NICKNAME odbc_nation altER COLUMN n_comment LOCAL TYPE varchar(152); -- ALTER NICKNAME odbc_orders altER COLUMN o_orderkey LOCAL TYPE integer; ALTER NICKNAME odbc_orders altER COLUMN o_custkey LOCAL TYPE integer; ALTER NICKNAME odbc_orders altER COLUMN o_orderstatus LOCAL TYPE char(1); ALTER NICKNAME odbc_orders altER COLUMN o_totalprice LOCAL TYPE decimal(10,4); ALTER NICKNAME odbc_orders altER COLUMN o_orderdate LOCAL TYPE date; ALTER NICKNAME odbc_orders altER COLUMN o_orderpriority LOCAL TYPE char(15); ALTER NICKNAME odbc_orders altER COLUMN o_clerk LOCAL TYPE char(15); ALTER NICKNAME odbc_orders altER COLUMN o_shippriority LOCAL TYPE integer; ALTER NICKNAME odbc_orders altER COLUMN o_comment LOCAL TYPE varchar(79); -- ALTER NICKNAME odbc_supplier altER COLUMN s_suppkey LOCAL TYPE integer; ALTER NICKNAME odbc_supplier altER COLUMN s_name LOCAL TYPE char(25); ALTER NICKNAME odbc_supplier altER COLUMN s_address LOCAL TYPE varchar(40); ALTER NICKNAME odbc_supplier altER COLUMN s_nationkey LOCAL TYPE integer; ALTER NICKNAME odbc_supplier altER COLUMN s_phone LOCAL TYPE char(15); ALTER NICKNAME odbc_supplier altER COLUMN s_acctbal LOCAL TYPE decimal(10,4); ALTER NICKNAME odbc_supplier altER COLUMN s_comment LOCAL TYPE varchar(101); ---------------------------------------------------- -- 3. Union views over federated nicknames ---------------------------------------------------- -- -- for query #1 DROP VIEW fed_part; CREATE VIEW fed_part AS SELECT db2_part.*, ''db2'' AS p_server FROM db2_part UNION ALL SELECT ora_part.*, ''ora'' AS p_server FROM ora_part UNION ALL SELECT odbc_part.*, ''xls'' AS p_server FROM odbc_part; -- -- for query #2 DROP VIEW fed_partsupp; CREATE VIEW fed_partsupp AS SELECT db2_partsupp.*, ''db2'' AS ps_server FROM db2_partsupp UNION ALL SELECT ora_partsupp.*, ''ora'' AS ps_server FROM ora_partsupp UNION ALL SELECT |
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