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更新时间：2024-12-10 GMT+08:00
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DBC.INDICES

DSC将dbc.indices迁移为对应的mig_td_ext.vw_td_dbc_indices。

示例：databasename迁移为mig_td_ext.vw_td_dbc_tables.schemaname。

输入：

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sel databasename,tablename FROM dbc.indices
WHERE tablekind='T' and trim(databasename) = '<dbname>'
AND
( NOT(TRIM(tablename) LIKE ANY  (<excludelist>))
) AND indextype IN ( 'Q','P');

输出：

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SELECT
         mig_td_ext.vw_td_dbc_indices.schemaname
                             
, mig_td_ext.vw_td_dbc_indices.tablename

     FROM
         mig_td_ext.vw_td_dbc_indices
     WHERE
                               
mig_td_ext.vw_td_dbc_indices.tablekind =  'T'
         
AND TRIM(mig_td_ext.vw_td_dbc_indices.schemaname) =
'<dbname>'
         
AND( NOT( TRIM(mig_td_ext.vw_td_dbc_indices.tablename) LIKE ANY (
ARRAY[ < excludelist > ] ) ) )
;

在dbc.indices迁移过程中，查询应包含AND indextype IN ( 'Q','P')。否则，工具不会迁移该查询，且会记录以下错误消息：

"Query/statement is not supported as indextype should be mentioned with values 'P' and 'Q'."

dbc.sessioninfoV

输入：

select username,clientsystemuserid,clientipaddress,clientprogramname 
  from dbc.sessioninfoV 
 where sessionno = 140167641814784;

输出：

select usename AS username, NULL::TEXT AS clientsystemuserid
  , client_addr AS clientipaddress, application_name AS clientprogramname 
  from pg_catalog.pg_stat_activity 
 WHERE pid = 140167641814784;

dbc.sessioninfo

输入：

SELECT  username
,clientsystemuserid
 ,clientipaddress
,clientprogramname
 FROM
dbc.sessioninfo
WHERE
sessionno = lv_mig_session ;

输出：

select usename AS username, NULL::TEXT AS clientsystemuserid
  , client_addr AS clientipaddress, application_name AS clientprogramname 
  from pg_catalog.pg_stat_activity 
 WHERE pid = lv_mig_session;

Teradata SET QUERY_BAND，指定FOR SESSION

输入：

set query_band = 'AppName=${AUTO_SYS};JobName=${AUTO_JOB};TxDate=${TX_DATE};ScriptName=${script_name};' for session ;

输出：

set query_band = 'AppName=${AUTO_SYS};JobName=${AUTO_JOB};TxDate=${TX_DATE};ScriptName=${script_name};' /* for session */;

SESSION

输入：

select Session ;
should be migrated as below:
SELECT pg_backend_pid();

输出：

SELECT pg_backend_pid();
父主题： Teradata语法迁移

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