PG_EXTENSION

PG_EXTENSION系统表存储关于所安装扩展的信息。GaussDB(DWS)默认有三十四个扩展，即aio_scheduler、btree_gin、cudesckv、dimsearch、dist_fdw、functional_clog、functional_extension、functional_file、functional_hudi、functional_job、functional_largeobject、functional_memory、functional_other、functional_signal、functional_vacuum、gc_fdw、hdfs_fdw、hstore、log_fdw、operational_backup、operational_cgroup、operational_cudesc、operational_other、operational_replication、operational_restoration、operational_stats、operational_xlog、packages、pgcrypto、pldbgapi、plpgsql、roach_api、tsdb和uuid-ossp。