Teradata：如何从数据库表动态创建视图

Question

我使用的是 Teradata BTEQ 15.00 版。我有以下 SQL 代码。动态的SQL差不多了，就是格式有点不对。

.Export Report File = CViews.sql

.Rtitle ''
 .Foldline on
 .Format Off
 .set heading '';
 .set heading off;
 .set UNDERLINE OFF;
 .Omit On 4,5

Select
 CASE When ColNo = 1
 THEN 'Replace View
$view_db_name.VW_'||Tbl.Tablename||' As locking row for access
Select ('
 Else '' END (Title '')
 , Cols.Columnname (Title '')
 , CASE WHEN RevColNo = 1 THEN ')
From $db_name.'||Tbl.Tablename||';'
 Else '' END (Title '')
 , Row_Number () Over(Partition By Tbl.Tablename
 Order By Cols.ColumnId) As ColNo
 , Row_Number () Over(Partition By Tbl.Tablename
 Order By Cols.ColumnId Desc) As RevColNo
 From DBC.Tables Tbl
 Join DBC.Columns Cols
 On Tbl.Databasename = Cols.Databasename
 And Tbl.Tablename = Cols.TableName
 Where Tbl.Databasename = '$db_name'
 And Tbl.Tablekind = 'T'
 Order By Tbl.Tablename, ColNo
 ;
.Export Reset

.Run File CViews.sql

这是结果，但是"locking row for access"被截断了，所以我在编译时出错SQL。

Replace View  VIEWS_TEST.VW_LOCATION                   As loc
   ID
   LOC_TYPE_ID
   NAME
   LATITUDE
   LONGITUDE
   ADDR1
   ADDR2
   CITY
   STATE
   COUNTRY

   )  From TABLES_TEST.LOCATION                  ;

可以看到"As Loc"被截断了，所以报错如下：

*** Failure 3707 Syntax error, expected something like a 'SELECT' keyword o
 r a 'LOCK' keyword or '(' or a 'TRANSACTIONTIME' keyword between the 'As' key word and the word 'loc'.
                Statement# 1, Info =81
 *** Total elapsed time was 1 second.

我尝试了不同的方法来让它工作，但都失败了。

有什么建议吗？

Answer 1

.Export Report File = CViews.sql
.set width 200
.Rtitle ''
 .Foldline on
 .Format Off
 .set heading '';
 .set heading off;
 .set UNDERLINE OFF;
 .Omit On 4,5

Select
 CASE When ColNo = 1
 THEN 'Replace View
$view_db_name.VW_'||Tbl.Tablename||' As locking row for access
Select ('
 Else '' END (Title '')
 , Cols.Columnname (Title '')
 , CASE WHEN RevColNo = 1 THEN ')
From $db_name.'||Tbl.Tablename||';'
 Else '' END (Title '')
 , Row_Number () Over(Partition By Tbl.Tablename
 Order By Cols.ColumnId) As ColNo
 , Row_Number () Over(Partition By Tbl.Tablename
 Order By Cols.ColumnId Desc) As RevColNo
 From DBC.Tables Tbl
 Join DBC.Columns Cols
 On Tbl.Databasename = Cols.Databasename
 And Tbl.Tablename = Cols.TableName
 Where Tbl.Databasename = '$db_name'
 And Tbl.Tablekind = 'T'
 Order By Tbl.Tablename, ColNo
 ;
.Export Reset

.Run File CViews.sql

Answer 2

这是 TD 15.00 版的工作版本。我添加了缺少的“，”并更改为 dbc.tablesV 和 dbc.ColumnsV.

.os rm CViews.sql
.Export Report File = CViews.sql
.set width 300
.Rtitle ''
 .Foldline on
 .Format Off
 .set heading '';
 .set heading off;
 .set UNDERLINE OFF;
 .Omit On 4,5
Select
 CASE When ColNo = 1
 THEN 'Replace View
$view_db_name.VW_'||Tbl.Tablename||' As locking row for access
Select '
 Else ', ' END (Title '')
 , Cols.Columnname (Title '')
 , CASE WHEN RevColNo = 1 THEN '
From $db_name.'||Tbl.Tablename||';'
 Else '' END (Title '')
 , Row_Number () Over(Partition By Tbl.Tablename
 Order By Cols.ColumnId) As ColNo
 , Row_Number () Over(Partition By Tbl.Tablename
 Order By Cols.ColumnId Desc) As RevColNo
 From DBC.TablesV Tbl
 Join DBC.ColumnsV Cols
   On Tbl.Databasename = Cols.Databasename
  And Tbl.Tablename = Cols.TableName
 Where Tbl.Databasename = '$db_name'
   And Tbl.Tablekind = 'T'
   and Tbl.Tablename not like 'WRK_%'
   and Tbl.Tablename not like 'ZZ_%'
 Order By Tbl.Tablename, ColNo
 ;
.Export Reset

.Run File CViews.sql

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