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当您在 bteq 中加载 teradata 表时，您可以为块级压缩设置查询带。这甚至在您使用 querygrid 并从外部服务器插入时也有效。

SET QUERY_BAND = 'BlockCompression=Yes;' UPDATE FOR SESSION;

我的问题是我在 Aster 系统上创建一个表，然后使用加载到 teradata 函数。我怀疑有一个语法调用，我可以将查询带设置为 load_to_teradata 调用的一部分，但是在搜索互联网并通过大量 teradata 文档之后，我还没有找到任何东西。 

-- Load Agg data for the YYYYMM to Teradta
SELECT SUM(loaded_row_count),SUM(error_row_count)
       FROM load_to_teradata (
       ON ( select 
              Cust_id
            , cast(lst_cnf_actvy_dt_tm as date) as lst_cnf_actvy_dt
            , cast(sum(str_cnt     ) as INTEGER) as acct_open_brnch_use_cnt
            , cast(sum(phone_cnt   ) as INTEGER) as acct_open_phn_use_cnt
            , cast(sum(mail_cnt    ) as INTEGER) as acct_open_mail_use_cnt
            , cast(sum(onlnchnl_cnt) as INTEGER) as acct_open_onln_use_cnt
            , cast(sum(mblbnk_cnt  ) as INTEGER) as acct_open_mbl_dvc_use_cnt
            , cast(sum(acctopen_cnt) as INTEGER) as acct_open_trck_chnl_cnt
            from <someDB>.<someTBL>
            where acctopen_cnt > 0
              and lower(lst_cnf_actvy_typ_cd) = 'acctopen'
              and cast(lst_cnf_actvy_dt_tm as date) between
                  cast(substring('${YYYYMM}' from 1 for 4) || '-' || substring('${YYYYMM}' from 5 for 2) || '-01' as date) and
                  cast((cast(substring('${YYYYMM}' from 1 for 4) || '-' || substring('${YYYYMM}' from 5 for 2) || '-01' as date) + interval '1 month') - interval '1 day' as date)
              and (str_cnt > 0 or phone_cnt > 0 or mail_cnt > 0 or onlnchnl_cnt > 0 or mblbnk_cnt > 0)
            group by 1,2 )
       TDPID('TD_RDBMS_C2T') USERNAME('${c2tUID}') PASSWORD('${c2tPWD}') ${LDAP_IND_AST_C2T}
       TARGET_TABLE ( 'C2T.t_yyyymm_agg' ) LOG_TABLE ('C2T.t_yyyymm_aggLOG')
       MAX_SESSIONS(120));
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1 回答 1

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能够获得 load_to_teradata 选项的语法。您可以在 max_sessions 之后和 query_timeout 之前看到 query_band_sess_info 参数...

load_to_teradata(
ON (source query)
TDPID('tdpid')
TARGET_TABLE('fully-qualified table name')
[ERROR_TABLES('error table'[, 'unique constraint violation table'])]
[LOG_TABLE('table name')]
Teradata QueryGrid: Aster-Teradata Connector
Loading Data From Aster Database to Teradata
Aster Database User Guide for Aster Appliances 301
[USERNAME('username')]
[PASSWORD('password')]
[LOGON_MECHANISM('TD2' | 'LDAP' | 'KRB5')]
[LOGON_DATA('mechanism-specific logon data')]
[ACCOUNT_ID('account-id')]
[TRACE_LEVEL('trace-level')]
[NUM_INSTANCES('instance-count')]
[START_INSTANCE('start-instance')]
[MAX_SESSIONS('max-sessions-number')]
[QUERY_BAND_SESS_INFO('key1=value1;key2=value2;...')]
[QUERY_TIMEOUT('timeout-in-seconds')]
[AUTO_TUNE_INSTANCES('yes'|'no')]
[WORKINGDATABASE(‘dbname’)]
[DIAGNOSTIC_MODE('All'|['GetCOPEntries','CheckConnectivity',
'CheckAuthentication','GetTPTSessions',
'TargetTableOrQuerySchema'])])
);
于 2019-02-27T01:22:04.347 回答