COLUMN c4没有压缩。因为缺省列存储设置指定了压缩模式，COLUMN c4明确指定了 不压缩，其块尺寸从DEFAULT COLUMN ENCODING子句继承而来为65536。 =# CREATE TABLE T4 ( c1 int ENCODING (compresstype=zlib), c2 char, c3 text, c4 smallint 增的字段指定ENCODING子句，否则会报错。关于压缩列的设置，参见"在列上设置压 缩"章节。下面的例子演示了在现有的T1表上增加zlib压缩列： =# ALTER TABLE T1 ADD COLUMN c4 int DEFAULT 0 ENCODING (compresstype=zlib); 继承压缩设置 在增加一个子分区(非一级分区)时，新的分区如果没有明确指定压缩属性，将不 export LDAPCONF=/etc/openldap/ldap.conf  如果使用了PL/Java，可能需要在greenplum_path.sh文件修改 JAVA_HOME和LD_LIBRARY_PATH的设置。 最好将新版本的greenplum_path.sh文件与现有版本进行对比，对于一些扩展 功能需要使用到的设置，在新版本的greenplum_path.sh文件中进行同步的更

class_id ORDER ORDER BY BY eventdate eventdate)) AS AS id id,, c1 c1,, c2 c2,, c3 c3,, c4 c4 FROM FROM events events;; class_id class_id eventdate eventdate window_clause window_clause

Data Science Library Package 282 R Data Science Library Package 0 R Data Science Libraries 283 Installing the R Data Science Library Package 285 Uninstalling the R Data Science Library Package 286 Greenplum Environment Variables 0 Required Environment Variables 312 GPHOME 312 PATH 312 LD_LIBRARY_PATH 312 MASTER_DATA_DIRECTORY 313 Optional Environment Variables 313 PGAPPNAME 313 PGDATABASE and Images 435 Remove PL/Container Support for a Database 435 Remove PL/Container 3 Beta Shared Library 435 Uninstall the PL/Container Language Extension 436 Notes 436 Docker References 437 PL/Java

Data Science Library Package 274 R Data Science Library Package 0 R Data Science Libraries 274 Installing the R Data Science Library Package 276 Uninstalling the R Data Science Library Package 276 Greenplum Environment Variables 0 Required Environment Variables 302 GPHOME 303 PATH 303 LD_LIBRARY_PATH 303 MASTER_DATA_DIRECTORY 303 Optional Environment Variables 303 VMware Greenplum v6.18 Documentation and Images 425 Remove PL/Container Support for a Database 426 Remove PL/Container 3 Beta Shared Library 426 Uninstall the PL/Container Language Extension 427 Notes 427 Docker References 428 PL/Java

Data Science Library Package 207 R Data Science Library Package 0 R Data Science Libraries 208 Installing the R Data Science Library Package 210 Uninstalling the R Data Science Library Package 210 Greenplum Environment Variables 0 Required Environment Variables 236 GPHOME 236 PATH 236 LD_LIBRARY_PATH 236 MASTER_DATA_DIRECTORY 237 Optional Environment Variables 237 PGAPPNAME 237 PGDATABASE and Images 360 Remove PL/Container Support for a Database 361 Remove PL/Container 3 Beta Shared Library 361 Uninstall the PL/Container Language Extension 362 Notes 362 Docker References 363 PL/Java

Module Package 278 R Data Science Library Package 279 R Data Science Libraries 279 Installing the R Data Science Library Package 281 Uninstalling the R Data Science Library Package 281 Greenplum Platform Greenplum Environment Variables 306 Required Environment Variables 306 GPHOME 307 PATH 307 LD_LIBRARY_PATH 307 MASTER_DATA_DIRECTORY 307 Optional Environment Variables 307 PGAPPNAME 307 PGDATABASE and Images 430 Remove PL/Container Support for a Database 430 Remove PL/Container 3 Beta Shared Library 430 Uninstall the PL/Container Language Extension 431 Notes 431 Docker References 432 PL/Java

for Python 443 R Data Science Library Package 443 R Data Science Libraries 444 Installing the R Data Science Library Package 446 Uninstalling the R Data Science Library Package 447 Greenplum Platform Greenplum Environment Variables 497 Required Environment Variables 497 GPHOME 498 PATH 498 LD_LIBRARY_PATH 498 MASTER_DATA_DIRECTORY 498 Optional Environment Variables 498 PGAPPNAME 498 PGDATABASE and Images 950 Remove PL/Container Support for a Database 950 Remove PL/Container 3 Beta Shared Library 950 Uninstall the PL/Container Language Extension 951 Notes 951 Docker References 952 Using PL/Container

for Python 424 R Data Science Library Package 425 R Data Science Libraries 425 Installing the R Data Science Library Package 427 Uninstalling the R Data Science Library Package 428 Greenplum Platform Greenplum Environment Variables 468 Required Environment Variables 469 GPHOME 469 PATH 469 LD_LIBRARY_PATH 469 MASTER_DATA_DIRECTORY 469 Optional Environment Variables 470 PGAPPNAME 470 PGDATABASE and Images 920 Remove PL/Container Support for a Database 921 Remove PL/Container 3 Beta Shared Library 921 Uninstall the PL/Container Language Extension 921 Notes 922 Docker References 923 VMware

Science Library Package 450 R Data Science Libraries 450 VMware Greenplum 6 Documentation VMware, Inc 18 Installing the R Data Science Library Package 451 Uninstalling the R Data Science Library Package Greenplum Environment Variables 493 Required Environment Variables 493 GPHOME 493 PATH 494 LD_LIBRARY_PATH 494 MASTER_DATA_DIRECTORY 494 Optional Environment Variables 494 PGAPPNAME 494 PGDATABASE and Images 939 Remove PL/Container Support for a Database 939 Remove PL/Container 3 Beta Shared Library 940 Uninstall the PL/Container Language Extension 940 Notes 941 Docker References 941 Using PL/Container

for Python 434 R Data Science Library Package 435 R Data Science Libraries 435 Installing the R Data Science Library Package 436 Uninstalling the R Data Science Library Package 437 Greenplum Platform Variables 474 GPHOME 474 PATH 474 VMware Tanzu Greenplum 6 Documentation VMware, Inc 19 LD_LIBRARY_PATH 474 MASTER_DATA_DIRECTORY 475 Optional Environment Variables 475 PGAPPNAME 475 PGDATABASE and Images 910 Remove PL/Container Support for a Database 910 Remove PL/Container 3 Beta Shared Library 910 Uninstall the PL/Container Language Extension 911 Notes 911 Docker References 912 Using PL/Container