1 下載oracle客戶端,放到/data目錄下(主節點)
instantclient-basic-linux.x64-12.2.0.1.0.zip、
instantclient-sdk-linux.x64-12.2.0.1.0.zip、
instantclient-sqlplus-linux.x64-12.2.0.1.0.zip三個文件包
#解壓縮，並修改目錄爲instantclient
mv instantclient_12_2 instantclient
2 在root和gpadmin用戶下配置環境變量(主節點)
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export ORACLE_HOME=/data/instantclient export OCI_LIB_DIR=$ORACLE_HOME export OCI_INC_DIR=$ORACLE_HOME/sdk/include export LD_LIBRARY_PATH=$ORACLE_HOME:$LD_LIBRARY_PATH |
3 下載編譯oracle_fdw(主節點)
https://github.com/adam8157/oracle_fdw_greenplum
4 編譯(主節點)
#make
報錯如下：這裏的意思是沒有初始化事務隔離級別，那麼需要修改源碼
[root@mdw oracle_fdw_greenplum-master]# vi oracle_utils.c
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*oracleGetSession(const char *connectstring, oraIsoLevel isolation_level, char *user, char *password, const char *nls_lang, const char *tablename, int curlevel) { OCIEnv *envhp = NULL; OCIError *errhp = NULL; OCISvcCtx *svchp = NULL; OCIServer *srvhp = NULL; OCISession *userhp = NULL; OCITrans *txnhp = NULL; oracleSession *session; struct envEntry *envp; struct srvEntry *srvp; struct connEntry *connp; char pid[30], *nlscopy = NULL; ub4 is_connected; int retry = 1; ub4 isolevel = OCI_TRANS_NEW;//修改事務隔離級別，否則報錯未初始化
/* convert isolation_level to Oracle OCI value */ switch(isolation_level) { case ORA_TRANS_SERIALIZABLE: isolevel = OCI_TRANS_SERIALIZABLE; break; case ORA_TRANS_READ_COMMITTED: isolevel = OCI_TRANS_NEW; break; case ORA_TRANS_READ_ONLY: isolevel = OCI_TRANS_READONLY; break; } |
[root@mdw oracle_fdw_greenplum-master]# make
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -fno-aggressive-loop-optimizations -Wno-unused-but-set-variable -Wno-address -O3 -std=gnu99 -Werror=uninitialized -Werror=implicit-function-declaration -fPIC -shared -o oracle_fdw.so oracle_fdw.o oracle_utils.o oracle_gis.o -L/usr/local/greenplum-db-6.5.0/lib -Wl,--as-needed -Wl,-rpath,'/usr/local/greenplum-db-6.5.0/lib',--enable-new-dtags -L/data/instantclient -L/data/instantclient/bin -L/data/instantclient/lib -L/data/instantclient/lib/amd64 -lclntsh -L/usr/lib/oracle/19.6/client/lib -L/usr/lib/oracle/19.6/client64/lib -L/usr/lib/oracle/19.3/client/lib -L/usr/lib/oracle/19.3/client64/lib -L/usr/lib/oracle/18.5/client/lib -L/usr/lib/oracle/18.5/client64/lib -L/usr/lib/oracle/18.3/client/lib -L/usr/lib/oracle/18.3/client64/lib -L/usr/lib/oracle/12.2/client/lib -L/usr/lib/oracle/12.2/client64/lib -L/usr/lib/oracle/12.1/client/lib -L/usr/lib/oracle/12.1/client64/lib -L/usr/lib/oracle/11.2/client/lib -L/usr/lib/oracle/11.2/client64/lib -L/usr/lib/oracle/11.1/client/lib -L/usr/lib/oracle/11.1/client64/lib -L/usr/lib/oracle/10.2.0.5/client/lib -L/usr/lib/oracle/10.2.0.5/client64/lib -L/usr/lib/oracle/10.2.0.4/client/lib -L/usr/lib/oracle/10.2.0.4/client64/lib -L/usr/lib/oracle/10.2.0.3/client/lib -L/usr/lib/oracle/10.2.0.3/client64/lib
(python) [root@mdw oracle_fdw_greenplum-master]# make install
/usr/bin/mkdir -p '/usr/local/greenplum-db-6.5.0/lib/postgresql'
/usr/bin/mkdir -p '/usr/local/greenplum-db-6.5.0/share/postgresql/extension'
/usr/bin/mkdir -p '/usr/local/greenplum-db-6.5.0/share/postgresql/extension'
/usr/bin/mkdir -p '/usr/local/greenplum-db-6.5.0/share/doc/postgresql/extension'
/usr/bin/install -c -m 755 oracle_fdw.so '/usr/local/greenplum-db-6.5.0/lib/postgresql/oracle_fdw.so'
/usr/bin/install -c -m 644 oracle_fdw.control '/usr/local/greenplum-db-6.5.0/share/postgresql/extension/'
/usr/bin/install -c -m 644 oracle_fdw--1.2.sql oracle_fdw--1.0--1.1.sql oracle_fdw--1.1--1.2.sql '/usr/local/greenplum-db-6.5.0/share/postgresql/extension/'
/usr/bin/install -c -m 644 README.oracle_fdw '/usr/local/greenplum-db-6.5.0/share/doc/postgresql/extension/'
5 複製編譯文件到所有節點
將主節點/usr/local/greenplum-db-6.5.0/lib/postgresql/oracle_fdw.so放到所有節點相應目錄下
將主節點/usr/local/greenplum-db-6.5.0/share/postgresql/extension下的所有oracle_fdw相關的文件放到所有節點相應目錄下
6 分發oracle客戶端到所有節點
（1）將主節點目錄/data下的目錄instantclient分發到所有節點上
（2）在所有節點的root和gpadmin目錄下配置環境變量
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export ORACLE_HOME=/data/instantclient export OCI_LIB_DIR=$ORACLE_HOME export OCI_INC_DIR=$ORACLE_HOME/sdk/include export LD_LIBRARY_PATH=$ORACLE_HOME:$LD_LIBRARY_PATH |
（3）所有節點(包含主節點)instantclient目錄下做軟連接
[root@mdw instantclient]# ln -s libclntsh.so.12.1 libclntsh.so
[root@mdw instantclient]# ll
total 219848
-rwxrwxr-x. 1 gpadmin gpadmin 44220 Jan 26 2017 adrci
-rw-rw-r--. 1 gpadmin gpadmin 363 Jan 26 2017 BASIC_README
-rwxrwxr-x. 1 gpadmin gpadmin 57272 Jan 26 2017 genezi
-r-xr-xr-x. 1 gpadmin gpadmin 342 Jan 26 2017 glogin.sql
-rwxrwxr-x. 1 gpadmin gpadmin 8033199 Jan 26 2017 libclntshcore.so.12.1
lrwxrwxrwx. 1 root root 17 Jun 16 15:25 libclntsh.so -> libclntsh.so.12.1
.........................
7 動態連接庫增加oracle客戶端地址(所有節點執行)
所有節點執行下列操作：
# 每個節點加入oracle客戶端的庫路徑（root用戶），讓pg
# cd /etc/ld.so.conf.d/
# vi oracle-x86_64.conf
/data/instantclient
# ldconfig
注:如果不執行上述步驟，在create extension時會報錯：
8 創建oracl_fdw並測試結果(主節點)
postgres=# create extension oracle_fdw;
CREATE EXTENSION
#創建名稱爲oradb 的oracle_fdw
postgres=# CREATE SERVER oradb FOREIGN DATA WRAPPER oracle_fdw OPTIONS (dbserver '//172.30.78.2:1521/amrdb');
CREATE SERVER
#爲用戶gpadmin創建基於oradb的mapping
postgres=# CREATE USER MAPPING FOR gpadmin SERVER oradb OPTIONS (user 'amr', password 'amr');
CREATE USER MAPPING
#創建外部表，其中schema 'AMR', table 'T_FDW'爲oracle的用戶名和表名
postgres=# CREATE FOREIGN TABLE t_fdw_ora(id int)SERVER oradb OPTIONS (schema 'AMR', table 'T_FDW');
CREATE FOREIGN TABLE
#測試連接成功
postgres=# select * from t_fdw_ora;
id
----
1