+1 with Vineet's comment. in your statement "insert into call_center select * from ext_call_center;" There are two strict restriction of how many virtual segments need to be started: 1 the bucket number of hash distributed result relation call_center (must equal to #vseg) 2 the number of locations in gpfdist ext table ext_call_center (<= #vseg)
You must set the the bucket number of call_center bigger than the the number of locations in ext_call_center Thanks Hubert On Thu, Sep 22, 2016 at 1:19 AM, Luis Macedo <lmac...@pivotal.io> wrote: > Also on your location clause you should not reference the same file more > than one time. > > If you want to scale gpfdist process you need to use different range on > each port for a same server. (Not sure if I explain myself :)) > > If you use one gpfdist per server performance should be fine. One gpfdist > process usually can do 250MB/s if underlying infra allows. > > Rgds > > --- Sent from my Nexus 5x > > Em 21 de set de 2016 12:14 PM, "Vineet Goel" <vvin...@apache.org> > escreveu: > >> Your default_hash_table_bucket_number value is set to 6. Typically, this >> should be adjusted as 6 x #_of_your_segment_hosts. With 3 segments, you >> should set this value to 18. Any time you change this parameter, you should >> redistribute your HASH distributed tables, if you have any (unless the >> table DDL has # of buckets defined, I think). >> >> Increase default_hash_table_bucket_number to 18 and retry the insert. >> Since you have 18 ext table URLs, it should work with the change. >> >> Thanks >> Vineet >> >> >> On Wed, Sep 21, 2016 at 12:26 AM 来熊 <yin....@163.com> wrote: >> >>> >>> My environment is >>>> : 1 master 3 segments >>> SQL >>>>>>: >>> CREATE TABLE call_center ( >>> cc_call_center_sk integer, >>> cc_call_center_id character varying(16), >>> cc_rec_start_date date, >>> cc_rec_end_date date, >>> cc_closed_date_sk integer, >>> cc_open_date_sk integer, >>> cc_name character varying(50), >>> cc_class character varying(50), >>> cc_employees integer, >>> cc_sq_ft integer, >>> cc_hours character varying(20), >>> cc_manager character varying(40), >>> cc_mkt_id integer, >>> cc_mkt_class character varying(50), >>> cc_mkt_desc character varying(100), >>> cc_market_manager character varying(40), >>> cc_division text, >>> cc_division_name character varying(50), >>> cc_company text, >>> cc_company_name character varying(50), >>> cc_street_number character varying(10), >>> cc_street_name character varying(60), >>> cc_street_type character varying(15), >>> cc_suite_number character varying(10), >>> cc_city character varying(60), >>> cc_county character varying(30), >>> cc_state text, >>> cc_zip character varying(10), >>> cc_country character varying(20), >>> cc_gmt_offset numeric(5,2), >>> cc_tax_percentage numeric(5,2) >>> ) >>> WITH (appendonly=true, orientation=parquet) >>> DISTRIBUTED BY (cc_call_center_sk); >>> >>> CREATE EXTERNAL TABLE ext_call_center (like call_center) >>> LOCATION ( >>> 'gpfdist://segment3:9001/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment3:9002/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment3:9003/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment3:9004/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment3:9005/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment3:9006/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment2:9001/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment2:9002/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment2:9003/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment2:9004/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment2:9005/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment2:9006/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment1:9001/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment1:9002/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment1:9003/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment1:9004/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment1:9005/call_center_[0-9]*_[0-9]*.dat', >>> 'gpfdist://segment1:9006/call_center_[0-9]*_[0-9]*.dat') >>> FORMAT 'TEXT' (DELIMITER '|' NULL AS '' ESCAPE AS E'\\'); >>> >>> insert into call_center select * from ext_call_center; >>> >>> ERROR: External scan error: There are more external files (URLs) than >>> primary segments that can read them (COptTasks.cpp:1756) >>> >>> hawq config >>>>: >>> >>> GUC : add_missing_from Value : off >>> GUC : application_name Value : >>> GUC : array_nulls Value : on >>> GUC : authentication_timeout Value : 60 >>> GUC : backslash_quote Value : safe_encoding >>> GUC : block_size Value : 32768 >>> GUC : bonjour_name Value : >>> GUC : check_function_bodies Value : on >>> GUC : client_encoding Value : UTF8 >>> GUC : client_min_messages Value : ERROR >>> GUC : cpu_index_tuple_cost Value : 0.005 >>> GUC : cpu_operator_cost Value : 0.0025 >>> GUC : cpu_tuple_cost Value : 0.01 >>> GUC : cursor_tuple_fraction Value : 1 >>> GUC : custom_variable_classes Value : >>> GUC : DateStyle Value : ISO, MDY >>> GUC : db_user_namespace Value : off >>> GUC : deadlock_timeout Value : 1000 >>> GUC : debug_assertions Value : off >>> GUC : debug_pretty_print Value : off >>> GUC : debug_print_parse Value : off >>> GUC : debug_print_plan Value : off >>> GUC : debug_print_prelim_plan Value : off >>> GUC : debug_print_rewritten Value : off >>> GUC : debug_print_slice_table Value : off >>> GUC : default_hash_table_bucket_number Value : 6 >>> GUC : default_statement_mem Value : 128000 >>> GUC : default_statistics_target Value : 25 >>> GUC : default_tablespace Value : >>> GUC : default_transaction_isolation Value : read committed >>> GUC : default_transaction_read_only Value : off >>> GUC : dfs_url Value : localhost:8020/hawq >>> GUC : dynamic_library_path Value : $libdir >>> GUC : effective_cache_size Value : 16384 >>> GUC : enable_bitmapscan Value : on >>> GUC : enable_groupagg Value : on >>> GUC : enable_hashagg Value : on >>> GUC : enable_hashjoin Value : on >>> GUC : enable_indexscan Value : on >>> GUC : enable_mergejoin Value : off >>> GUC : enable_nestloop Value : off >>> GUC : enable_secure_filesystem Value : off >>> GUC : enable_seqscan Value : on >>> GUC : enable_sort Value : on >>> GUC : enable_tidscan Value : on >>> GUC : escape_string_warning Value : on >>> GUC : explain_memory_verbosity Value : suppress >>> GUC : explain_pretty_print Value : on >>> GUC : extra_float_digits Value : 0 >>> GUC : filesystem_support_truncate Value : on >>> GUC : from_collapse_limit Value : 20 >>> GUC : gp_adjust_selectivity_for_outerjoins Value : on >>> GUC : gp_analyze_relative_error Value : 0.25 >>> GUC : gp_autostats_mode Value : NONE >>> GUC : gp_autostats_on_change_threshold Value : 2147483647 >>> GUC : gp_backup_directIO Value : off >>> GUC : gp_backup_directIO_read_chunk_mb Value : 20 >>> GUC : gp_cached_segworkers_threshold Value : 5 >>> GUC : gp_command_count Value : 6 >>> GUC : gp_connections_per_thread Value : 64 >>> GUC : gp_debug_linger Value : 0 >>> GUC : gp_dynamic_partition_pruning Value : on >>> GUC : gp_email_connect_avoid_duration Value : 7200 >>> GUC : gp_email_connect_failures Value : 5 >>> GUC : gp_email_connect_timeout Value : 15 >>> GUC : gp_email_from Value : >>> GUC : gp_email_smtp_password Value : >>> GUC : gp_email_smtp_server Value : localhost:25 >>> GUC : gp_email_smtp_userid Value : >>> GUC : gp_email_to Value : >>> GUC : gp_enable_agg_distinct Value : on >>> GUC : gp_enable_agg_distinct_pruning Value : on >>> GUC : gp_enable_direct_dispatch Value : on >>> GUC : gp_enable_fallback_plan Value : on >>> GUC : gp_enable_fast_sri Value : on >>> GUC : gp_enable_gpperfmon Value : off >>> GUC : gp_enable_groupext_distinct_gather Value : on >>> GUC : gp_enable_groupext_distinct_pruning Value : on >>> GUC : gp_enable_multiphase_agg Value : on >>> GUC : gp_enable_predicate_propagation Value : on >>> GUC : gp_enable_preunique Value : on >>> GUC : gp_enable_sequential_window_plans Value : on >>> GUC : gp_enable_sort_distinct Value : on >>> GUC : gp_enable_sort_limit Value : on >>> GUC : gp_external_enable_exec Value : on >>> GUC : gp_external_grant_privileges Value : off >>> GUC : gp_external_max_segs Value : 64 >>> GUC : gp_filerep_tcp_keepalives_count Value : 2 >>> GUC : gp_filerep_tcp_keepalives_idle Value : 60 >>> GUC : gp_filerep_tcp_keepalives_interval Value : 30 >>> GUC : gp_force_use_default_temporary_directory Value : off >>> GUC : gp_gpperfmon_send_interval Value : 1 >>> GUC : gp_hashjoin_tuples_per_bucket Value : 5 >>> GUC : gp_idf_deduplicate Value : auto >>> GUC : gp_interconnect_cache_future_packets Value : on >>> GUC : gp_interconnect_default_rtt Value : 20 >>> GUC : gp_interconnect_fc_method Value : LOSS >>> GUC : gp_interconnect_hash_multiplier Value : 2 >>> GUC : gp_interconnect_min_retries_before_timeout Value : 100 >>> GUC : gp_interconnect_min_rto Value : 20 >>> GUC : gp_interconnect_queue_depth Value : 4 >>> GUC : gp_interconnect_setup_timeout Value : 7200 >>> GUC : gp_interconnect_snd_queue_depth Value : 2 >>> GUC : gp_interconnect_timer_checking_period Value : 20 >>> GUC : gp_interconnect_timer_period Value : 5 >>> GUC : gp_interconnect_transmit_timeout Value : 3600 >>> GUC : gp_interconnect_type Value : UDP >>> GUC : gp_log_format Value : csv >>> GUC : gp_max_csv_line_length Value : 1048576 >>> GUC : gp_max_databases Value : 16 >>> GUC : gp_max_filespaces Value : 8 >>> GUC : gp_max_packet_size Value : 8192 >>> GUC : gp_max_partition_level Value : 0 >>> GUC : gp_max_plan_size Value : 0 >>> GUC : gp_max_relations Value : 65536 >>> GUC : gp_max_tablespaces Value : 16 >>> GUC : gp_motion_cost_per_row Value : 0 >>> GUC : gp_num_contents_in_cluster Value : -10000 >>> GUC : gp_query_context_mem_limit Value : 102400 >>> GUC : gp_reject_percent_threshold Value : 300 >>> GUC : gp_reraise_signal Value : on >>> GUC : gp_role Value : utility >>> GUC : gp_safefswritesize Value : 0 >>> GUC : gp_segment_connect_timeout Value : 600 >>> GUC : gp_segments_for_planner Value : 0 >>> GUC : gp_session_id Value : -1 >>> GUC : gp_set_proc_affinity Value : off >>> GUC : gp_snmp_community Value : public >>> GUC : gp_snmp_monitor_address Value : >>> GUC : gp_snmp_use_inform_or_trap Value : trap >>> GUC : gp_statistics_pullup_from_child_partition Value : on >>> GUC : gp_statistics_use_fkeys Value : on >>> GUC : gp_subtrans_warn_limit Value : 16777216 >>> GUC : gp_temporary_directory_mark_error Value : 0 >>> GUC : gp_udp_bufsize_k Value : 0 >>> GUC : gp_vmem_protect_segworker_cache_limit Value : 500 >>> GUC : gp_workfile_checksumming Value : on >>> GUC : gp_workfile_compress_algorithm Value : none >>> GUC : gp_workfile_limit_per_query Value : 0 >>> GUC : gp_workfile_limit_per_segment Value : 0 >>> GUC : gpperfmon_port Value : 8888 >>> GUC : hawq_global_rm_type Value : yarn >>> GUC : hawq_master_address_host Value : master.bigdata >>> GUC : hawq_master_address_port Value : 6432 >>> GUC : hawq_master_temp_directory Value : /tmp >>> GUC : hawq_metadata_cache_block_capacity Value : 2097152 >>> GUC : hawq_metadata_cache_check_interval Value : 30 >>> GUC : hawq_metadata_cache_flush_ratio Value : 0.85 >>> GUC : hawq_metadata_cache_free_block_max_ratio Value : 0.05 >>> GUC : hawq_metadata_cache_free_block_normal_ratio Value : 0.2 >>> GUC : hawq_metadata_cache_max_hdfs_file_num Value : 524288 >>> GUC : hawq_metadata_cache_reduce_ratio Value : 0.7 >>> GUC : hawq_metadata_cache_refresh_interval Value : 3600 >>> GUC : hawq_metadata_cache_refresh_max_num Value : 1000 >>> GUC : hawq_metadata_cache_refresh_timeout Value : 3600 >>> GUC : hawq_re_cgroup_hierarchy_name Value : hadoop-yarn >>> GUC : hawq_re_cgroup_mount_point Value : /sys/fs/cgroup >>> GUC : hawq_re_cpu_enable Value : off >>> GUC : hawq_re_cpu_weight Value : 1024 >>> GUC : hawq_re_memory_overcommit_max Value : 8192 >>> GUC : hawq_re_vcore_pcore_ratio Value : 1 >>> GUC : hawq_rm_cluster_report_period Value : 60 >>> GUC : hawq_rm_clusterratio_core_to_memorygb_factor Value : 5 >>> GUC : hawq_rm_connpool_sameaddr_buffersize Value : 2 >>> GUC : hawq_rm_container_batch_limit Value : 1000 >>> GUC : hawq_rm_enable_connpool Value : on >>> GUC : hawq_rm_force_alterqueue_cancel_queued_request Value : on >>> GUC : hawq_rm_force_fifo_queuing Value : on >>> GUC : hawq_rm_master_domain_port Value : 5436 >>> GUC : hawq_rm_master_port Value : 5437 >>> GUC : hawq_rm_memory_limit_perseg Value : 480GB >>> GUC : hawq_rm_min_resource_perseg Value : 2 >>> GUC : hawq_rm_nocluster_timeout Value : 60 >>> GUC : hawq_rm_nresqueue_limit Value : 128 >>> GUC : hawq_rm_nslice_perseg_limit Value : 5000 >>> GUC : hawq_rm_nvcore_limit_perseg Value : 16 >>> GUC : hawq_rm_nvseg_for_analyze_nopart_perquery_limit Value : 512 >>> GUC : hawq_rm_nvseg_for_analyze_nopart_perquery_perseg_limit Value : 8 >>> GUC : hawq_rm_nvseg_for_analyze_part_perquery_limit Value : 256 >>> GUC : hawq_rm_nvseg_for_analyze_part_perquery_perseg_limit Value : 4 >>> GUC : hawq_rm_nvseg_for_copy_from_perquery Value : 6 >>> GUC : hawq_rm_nvseg_perquery_limit Value : 512 >>> GUC : hawq_rm_nvseg_perquery_perseg_limit Value : 6 >>> GUC : hawq_rm_nvseg_variance_amon_seg_limit Value : 1 >>> GUC : hawq_rm_nvseg_variance_amon_seg_respool_limit Value : 2 >>> GUC : hawq_rm_regularize_io_factor Value : 1 >>> GUC : hawq_rm_regularize_io_max Value : 1.37439e+11 >>> GUC : hawq_rm_regularize_nvseg_factor Value : 1 >>> GUC : hawq_rm_regularize_nvseg_max Value : 300 >>> GUC : hawq_rm_regularize_usage_factor Value : 1 >>> GUC : hawq_rm_rejectrequest_nseg_limit Value : 0.25 >>> GUC : hawq_rm_request_timeoutcheck_interval Value : 1 >>> GUC : hawq_rm_resource_allocation_timeout Value : 600 >>> GUC : hawq_rm_resource_idle_timeout Value : 300 >>> GUC : hawq_rm_respool_test_file Value : >>> GUC : hawq_rm_return_percent_on_overcommit Value : 10 >>> GUC : hawq_rm_segment_config_refresh_interval Value : 30 >>> GUC : hawq_rm_segment_heartbeat_interval Value : 30 >>> GUC : hawq_rm_segment_heartbeat_timeout Value : 300 >>> GUC : hawq_rm_segment_port Value : 5438 >>> GUC : hawq_rm_segment_tmpdir_detect_interval Value : 300 >>> GUC : hawq_rm_session_lease_heartbeat_enable Value : on >>> GUC : hawq_rm_session_lease_heartbeat_interval Value : 10 >>> GUC : hawq_rm_session_lease_timeout Value : 180 >>> GUC : hawq_rm_stmt_nvseg Value : 0 >>> GUC : hawq_rm_stmt_vseg_memory Value : 128mb >>> GUC : hawq_rm_tolerate_nseg_limit Value : 0.25 >>> GUC : hawq_rm_yarn_address Value : worker1.bigdata:8050 >>> GUC : hawq_rm_yarn_app_name Value : hawq >>> GUC : hawq_rm_yarn_queue_name Value : default >>> GUC : hawq_rm_yarn_scheduler_address Value : worker1.bigdata:8030 >>> GUC : hawq_segment_address_port Value : 40000 >>> GUC : hawq_segment_history_keep_period Value : 365 >>> GUC : hawq_segment_temp_directory Value : /tmp >>> GUC : integer_datetimes Value : on >>> GUC : IntervalStyle Value : postgres >>> GUC : join_collapse_limit Value : 20 >>> GUC : krb5_ccname Value : /tmp/postgres.ccname >>> GUC : krb_caseins_users Value : off >>> GUC : krb_server_keyfile Value : FILE:/data/pulse2-agent/agents >>> /agent1/work/HAWQ-main-opt/rhel5_x86_64/src/hawq-db-dist/etc/krb5.keytab >>> GUC : krb_srvname Value : postgres >>> GUC : lc_collate Value : C >>> GUC : lc_ctype Value : C >>> GUC : lc_messages Value : en_US.utf8 >>> GUC : lc_monetary Value : en_US.utf8 >>> GUC : lc_numeric Value : en_US.utf8 >>> GUC : lc_time Value : en_US.utf8 >>> GUC : listen_addresses Value : * >>> GUC : local_preload_libraries Value : >>> GUC : log_autostats Value : off >>> GUC : log_connections Value : off >>> GUC : log_disconnections Value : off >>> GUC : log_dispatch_stats Value : off >>> GUC : log_duration Value : off >>> GUC : log_error_verbosity Value : default >>> GUC : log_executor_stats Value : off >>> GUC : log_hostname Value : off >>> GUC : log_min_duration_statement Value : -1 >>> GUC : log_min_error_statement Value : error >>> GUC : log_min_messages Value : warning >>> GUC : log_parser_stats Value : off >>> GUC : log_planner_stats Value : off >>> GUC : log_rotation_age Value : 1440 >>> GUC : log_rotation_size Value : 0 >>> GUC : log_statement Value : none >>> GUC : log_statement_stats Value : off >>> GUC : log_timezone Value : PRC >>> GUC : log_truncate_on_rotation Value : off >>> GUC : maintenance_work_mem Value : 65536 >>> GUC : master_directory Value : >>> GUC : max_appendonly_segfiles Value : 262144 >>> GUC : max_appendonly_tables Value : 10000 >>> GUC : max_connections Value : 1280 >>> GUC : max_files_per_process Value : 150 >>> GUC : max_fsm_pages Value : 200000 >>> GUC : max_fsm_relations Value : 1000 >>> GUC : max_function_args Value : 100 >>> GUC : max_identifier_length Value : 63 >>> GUC : max_index_keys Value : 32 >>> GUC : max_locks_per_transaction Value : 128 >>> GUC : max_prepared_transactions Value : 250 >>> GUC : max_stack_depth Value : 2048 >>> GUC : max_work_mem Value : 1024000 >>> GUC : metadata_cache_testfile Value : >>> GUC : optimizer Value : on >>> GUC : optimizer_analyze_root_partition Value : on >>> GUC : optimizer_minidump Value : onerror >>> GUC : optimizer_parts_to_force_sort_on_insert Value : 160 >>> GUC : password_encryption Value : on >>> GUC : password_hash_algorithm Value : MD5 >>> GUC : pljava_classpath Value : >>> GUC : pljava_release_lingering_savepoints Value : off >>> GUC : pljava_statement_cache_size Value : 0 >>> GUC : pljava_vmoptions Value : >>> GUC : port Value : 6432 >>> GUC : pxf_enable_filter_pushdown Value : on >>> GUC : pxf_enable_locality_optimizations Value : on >>> GUC : pxf_enable_stat_collection Value : on >>> GUC : pxf_remote_service_login Value : >>> GUC : pxf_remote_service_secret Value : >>> GUC : pxf_service_address Value : localhost:51200 >>> GUC : pxf_stat_max_fragments Value : 100 >>> GUC : random_page_cost Value : 100 >>> GUC : regex_flavor Value : advanced >>> GUC : runaway_detector_activation_percent Value : 95 >>> GUC : search_path Value : "$user",public >>> GUC : seg_max_connections Value : 3000 >>> GUC : segment_directory Value : >>> GUC : seq_page_cost Value : 1 >>> GUC : server_encoding Value : UTF8 >>> GUC : server_ticket_renew_interval Value : 43200000 >>> GUC : server_version Value : 8.2.15 >>> GUC : server_version_num Value : 80215 >>> GUC : shared_buffers Value : 4000 >>> GUC : shared_preload_libraries Value : >>> GUC : ssl Value : off >>> GUC : ssl_ciphers Value : ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH >>> GUC : standard_conforming_strings Value : off >>> GUC : standby_address_host Value : localhost >>> GUC : statement_timeout Value : 0 >>> GUC : superuser_reserved_connections Value : 3 >>> GUC : tcp_keepalives_count Value : 9 >>> GUC : tcp_keepalives_idle Value : 7200 >>> GUC : tcp_keepalives_interval Value : 75 >>> GUC : temp_buffers Value : 1024 >>> GUC : TimeZone Value : PRC >>> GUC : timezone_abbreviations Value : Default >>> GUC : track_activities Value : on >>> GUC : track_counts Value : off >>> GUC : transaction_isolation Value : read committed >>> GUC : transaction_read_only Value : off >>> GUC : transform_null_equals Value : off >>> GUC : unix_socket_directory Value : >>> GUC : unix_socket_group Value : >>> GUC : unix_socket_permissions Value : 511 >>> GUC : update_process_title Value : on >>> GUC : vacuum_cost_delay Value : 0 >>> GUC : vacuum_cost_limit Value : 200 >>> GUC : vacuum_cost_page_dirty Value : 20 >>> GUC : vacuum_cost_page_miss Value : 10 >>> GUC : vacuum_freeze_min_age Value : 100000000 >>> GUC : work_mem Value : 51200 >>> >>> >>> >>> >>> >>> At 2016-09-21 13:00:41, "Vineet Goel" <vvin...@apache.org> wrote: >>> >>> Could you please post your SQL DDL statement? How many URLs do you have >>> in your external table? Also, your HASH dist table - how many buckets are >>> defined, if any? Are the # of URLs more than the # of buckets or >>> default_hash_table_bucket_number value? Perhaps you can attach your >>> hawq-site.xml file as well. >>> >>> Also see: >>> http://hdb.docs.pivotal.io/20/datamgmt/load/g-gpfdist-protocol.html >>> >>> Thanks >>> Vineet >>> >>> >>> On Tue, Sep 20, 2016 at 7:07 PM 来熊 <yin....@163.com> wrote: >>> >>>> Hi,all: >>>> I am testing hawq 2.0.0 , and I find a problem like this: >>>> I load data from an external table (created using "like target_table" >>>> statement) , >>>> if the target table was distributed by some column(s), it raise this >>>> error: >>>> External scan error: There are more external files (URLs) than primary >>>> segments that can read them (COptTasks.cpp:1756) >>>> if the target table was distributed randomly, it works well, >>>> I don't set any parameter special,does anybody know how to resolve this >>>> problem? >>>> thanks a lot. >>>> >>> -- Thanks Hubert Zhang
