我有一个DB2SQL语句，它成功地选择了所需的行。由于这是一个耗时的查询，我正尝试使用createview语句将其转换为视图。
WITH firstequiprrn
AS (SELECT oeord# equiporder,
Min(RRN(a)) firstrow
FROM iesqafile.OPEQUIP a
GROUP BY oeord#
ORDER BY 1),
firstequiprow
AS (SELECT oeord#,
oetrlr equipmentnumber
FROM firstequiprrn
INNER JOIN iesqafile.OPEQUIP b
ON equiporder = oeord#
AND firstrow = RRN(b)),
ordermiles
AS (SELECT mmord#,
mmtotal
FROM iesqafile.mmiles
WHERE mmord# IN(SELECT orodr#
FROM iesqafile.order)
AND mmrectype = 'O'
AND mmdsp# = '00'),
stopgroup
AS (SELECT soord stoporder,
COUNT(*) stopsremain,
Min(sostp#) nextstop,
Max(soappr) apptreq,
Max(soaptm) apptmade
FROM iesqafile.stopoff
INNER JOIN iesqafile.order
ON orodr# = soord
WHERE soardt = 0
GROUP BY soord
ORDER BY 1) SELECT a.orodr# orodr_,
orcust,
orldat,
CASE orpdat
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orpdat), 'YYYY-MM-DD')
END erdat2,
CASE orptim
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(orptim, 1, 2), ':'),
SUBSTRING(orptim, 3, 4))
END AS ertim2,
CASE orapdt
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orapdt), 'YYYY-MM-DD')
END ltdat2,
CASE oraptm
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(oraptm, 1, 2), ':'),
SUBSTRING(oraptm, 3, 4))
END AS lttim2,
CASE orddat
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orddat), 'YYYY-MM-DD')
END dldat2,
CASE ordtim
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(ordtim, 1, 2), ':'),
SUBSTRING(ordtim, 3, 4))
END AS dltim2,
orestr,
a.ordv# ordv_,
orcons,
oreqty,
orspec,
a.orstp# orstp_,
orcomc,
( CASE
WHEN mmtotal IS NOT NULL THEN mmtotal
ELSE 0
END ) mmtotal,
orwgt,
orocty,
orost,
ordcty,
ordst,
orara asarea,
orpdrv oprdrv,
orld# orld_,
ordsp# ordsp_,
orshdt,
orshtm,
ornwpk,
( CASE
WHEN equipmentnumber IS NOT NULL THEN equipmentnumber
ELSE ''
END ) EquipmentNumber,
( CASE
WHEN apptreq IS NOT NULL THEN apptreq
ELSE 'N'
END ) apptreq,
( CASE
WHEN apptmade IS NOT NULL THEN apptmade
ELSE 'N'
END ) apptmade,
( CASE
WHEN ununit IS NOT NULL THEN ununit
ELSE ' '
END ) UNUNIT,
( CASE
WHEN unsupr IS NOT NULL THEN unsupr
ELSE ' '
END ) asdrmgr,
( CASE
WHEN unfmgr IS NOT NULL THEN unfmgr
ELSE ' '
END ) asflmgr,
( CASE
WHEN untrl1 IS NOT NULL THEN untrl1
ELSE ' '
END ) UNTRL1
FROM iesqafile.order a
LEFT OUTER JOIN ordermiles
ON mmord# = a.orodr#
LEFT OUTER JOIN firstequiprow
ON a.orodr# = oeord#
LEFT OUTER JOIN stopgroup
ON a.orodr# = stoporder
LEFT OUTER JOIN iesqafile.units
ON ununit = a.orpdrv
WHERE orld# <> ordsp#
AND ( orspec = 'N# C'
OR orspec = 'N# P' )
AND orpdrv <> ''
AND orpdat >= 2018001
UNION
SELECT d.orodr# as ordddd,
orcust,
orldat,
CASE orpdat
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orpdat), 'YYYY-MM-DD')
END erdat2,
CASE orptim
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(orptim, 1, 2), ':'),
SUBSTRING(orptim, 3, 4))
END AS ertim2,
CASE orapdt
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orapdt), 'YYYY-MM-DD')
END ltdat2,
CASE oraptm
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(oraptm, 1, 2), ':'),
SUBSTRING(oraptm, 3, 4))
END AS lttim2,
CASE orddat
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orddat), 'YYYY-MM-DD')
END dldat2,
CASE ordtim
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(ordtim, 1, 2), ':'),
SUBSTRING(ordtim, 3, 4))
END AS dltim2,
orestr,
ordv#,
orcons,
oreqty,
orspec,
orstp#,
orcomc,
( CASE
WHEN mmtotal IS NOT NULL THEN mmtotal
ELSE 0
END ) mmtotal,
orwgt,
orocty,
orost,
ordcty,
ordst,
orara,
orpdrv,
orld#,
ordsp#,
orshdt,
orshtm,
ornwpk,
( CASE
WHEN equipmentnumber IS NOT NULL THEN equipmentnumber
ELSE ' '
END ) EquipmentNumber,
( CASE
WHEN apptreq IS NOT NULL THEN apptreq
ELSE 'N'
END ) apptreq,
( CASE
WHEN apptmade IS NOT NULL THEN apptmade
ELSE 'N'
END ) apptmade,
( CASE
WHEN ununit IS NOT NULL THEN ununit
ELSE ' '
END ) UNUNIT,
( CASE
WHEN unsupr IS NOT NULL THEN unsupr
ELSE ' '
END ) UNSUPR,
( CASE
WHEN unfmgr IS NOT NULL THEN unfmgr
ELSE ' '
END ) UNFMGR,
( CASE
WHEN untrl1 IS NOT NULL THEN untrl1
ELSE ' '
END ) UNTRL1
FROM iesqafile.opplan
LEFT OUTER JOIN iesqafile.order d
ON d.orodr# = opord#
LEFT OUTER JOIN ordermiles
ON mmord# = d.orodr#
LEFT OUTER JOIN firstequiprow
ON d.orodr# = oeord#
LEFT OUTER JOIN stopgroup
ON d.orodr# = stoporder
LEFT OUTER JOIN iesqafile.units
ON ununit = d.orpdrv
因此，我创建视图的第一次尝试只是在第一条语句的开头添加一个create view AS。这导致了以下错误：
A column list must be specified because the result columns are unnamed.
我无法理解这个错误，因为列标题确实被指定为没有问题的精选作品。所有列都以适当的标题显示。
但是，我尝试通过添加以下内容而不是简单的创建视图来修改查询。
create view pavt.v1 (v1,v2,v3,v4,v5,v6,v7,v8,v9,v10,v11,v12,v13,v14,v15,v16,v17,v18,v19,v20,v21,v22,v23,v24,v25,v26,v27,v28,v29,v30,v31,v32,v33,v34,v35,v36) as
这似乎奏效了，视图是在库PAVT中创建的。然而，当我在视图上运行select时，我会得到一个算术溢出错误，DB2错误代码为-802。
我不理解这一点，因为我可以查看结果，但问题只是在尝试创建查询时出现的。有人能给我引路吗？
更详细的错误描述如下：
Message . . . . : Select or omit error on field
Cast(Translate(ORDER_14.ORPTIM, *UNNAMED Table) AS member V.
Cause . . . . . : A select or omit error occurred in record 0, record format
*FIRST, member number 1 of file V in library PAVT, because of condition 1 of
the following conditions:
1 - The data was not valid in a decimal field.
此时此刻，我真正想知道的是，我所遵循的创建视图的方法是否正确(至少就语法而言(。也许我看到的错误是数据错误
第1版：
create view pavt.CCC1 as
WITH firstequiprrn
AS (SELECT oeord# equiporder,
Min(RRN(a)) firstrow
FROM iesqafile.OPEQUIP a
GROUP BY oeord#
ORDER BY 1),
firstequiprow
AS (SELECT oeord#,
oetrlr equipmentnumber
FROM firstequiprrn
INNER JOIN iesqafile.OPEQUIP b
ON equiporder = oeord#
AND firstrow = RRN(b)),
ordermiles
AS (SELECT mmord#,
mmtotal
FROM iesqafile.mmiles
WHERE mmord# IN(SELECT orodr#
FROM iesqafile.order)
AND mmrectype = 'O'
AND mmdsp# = '00'),
stopgroup
AS (SELECT soord stoporder,
COUNT(*) stopsremain,
Min(sostp#) nextstop,
Max(soappr) apptreq,
Max(soaptm) apptmade
FROM iesqafile.stopoff
INNER JOIN iesqafile.order
ON orodr# = soord
WHERE soardt = 0
GROUP BY soord
ORDER BY 1) SELECT a.orodr# orodr_,
orcust,
orldat,
CASE orpdat
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orpdat), 'YYYY-MM-DD')
END erdat2,
CASE orptim
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(char(orptim), 1, 2), ':'),
SUBSTRING(char(orptim), 3, 4))
END AS ertim2,
CASE orapdt
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orapdt), 'YYYY-MM-DD')
END ltdat2,
CASE oraptm
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(oraptm, 1, 2), ':'),
SUBSTRING(oraptm, 3, 4))
END AS lttim2,
CASE orddat
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orddat), 'YYYY-MM-DD')
END dldat2,
CASE ordtim
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(ordtim, 1, 2), ':'),
SUBSTRING(ordtim, 3, 4))
END AS dltim2,
orestr,
a.ordv# ordv_,
orcons,
oreqty,
orspec,
a.orstp# orstp_,
orcomc,
( CASE
WHEN mmtotal IS NOT NULL THEN mmtotal
ELSE 0
END ) mmtotal,
orwgt,
orocty,
orost,
ordcty,
ordst,
orara asarea,
orpdrv oprdrv,
orld# orld_,
ordsp# ordsp_,
orshdt,
orshtm,
ornwpk,
( CASE
WHEN equipmentnumber IS NOT NULL THEN equipmentnumber
ELSE ''
END ) EquipmentNumber,
( CASE
WHEN apptreq IS NOT NULL THEN apptreq
ELSE 'N'
END ) apptreq,
( CASE
WHEN apptmade IS NOT NULL THEN apptmade
ELSE 'N'
END ) apptmade,
( CASE
WHEN ununit IS NOT NULL THEN ununit
ELSE ' '
END ) UNUNIT,
( CASE
WHEN unsupr IS NOT NULL THEN unsupr
ELSE ' '
END ) asdrmgr,
( CASE
WHEN unfmgr IS NOT NULL THEN unfmgr
ELSE ' '
END ) asflmgr,
( CASE
WHEN untrl1 IS NOT NULL THEN untrl1
ELSE ' '
END ) UNTRL1
FROM iesqafile.order a
LEFT OUTER JOIN ordermiles
ON mmord# = a.orodr#
LEFT OUTER JOIN firstequiprow
ON a.orodr# = oeord#
LEFT OUTER JOIN stopgroup
ON a.orodr# = stoporder
LEFT OUTER JOIN iesqafile.units
ON ununit = a.orpdrv
WHERE orld# <> ordsp#
AND ( orspec = 'N# C'
OR orspec = 'N# P' )
AND orpdrv <> ''
AND orpdat >= 2018001
UNION
SELECT d.orodr# orodr_,
orcust,
orldat,
CASE orpdat
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orpdat), 'YYYY-MM-DD')
END erdat2,
CASE orptim
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(char(orptim), 1, 2), ':'),
SUBSTRING(char(orptim), 3, 4))
END AS ertim2,
CASE orapdt
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orapdt), 'YYYY-MM-DD')
END ltdat2,
CASE oraptm
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(oraptm, 1, 2), ':'),
SUBSTRING(oraptm, 3, 4))
END AS lttim2,
CASE orddat
WHEN 0 THEN Varchar(0)
ELSE Varchar_format(CHAR(orddat), 'YYYY-MM-DD')
END dldat2,
CASE ordtim
WHEN 0 THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(ordtim, 1, 2), ':'),
SUBSTRING(ordtim, 3, 4))
END AS dltim2,
orestr,
ordv# ordv_,
orcons,
oreqty,
orspec,
orstp# orstp_,
orcomc,
( CASE
WHEN mmtotal IS NOT NULL THEN mmtotal
ELSE 0
END ) mmtotal,
orwgt,
orocty,
orost,
ordcty,
ordst,
orara asarea,
orpdrv oprdrv,
orld# orld_,
ordsp# ordsp_,
orshdt,
orshtm,
ornwpk,
( CASE
WHEN equipmentnumber IS NOT NULL THEN equipmentnumber
ELSE ' '
END ) EquipmentNumber,
( CASE
WHEN apptreq IS NOT NULL THEN apptreq
ELSE 'N'
END ) apptreq,
( CASE
WHEN apptmade IS NOT NULL THEN apptmade
ELSE 'N'
END ) apptmade,
( CASE
WHEN ununit IS NOT NULL THEN ununit
ELSE ' '
END ) UNUNIT,
( CASE
WHEN unsupr IS NOT NULL THEN unsupr
ELSE ' '
END ) asdrmgr,
( CASE
WHEN unfmgr IS NOT NULL THEN unfmgr
ELSE ' '
END ) asflmgr,
( CASE
WHEN untrl1 IS NOT NULL THEN untrl1
ELSE ' '
END ) UNTRL1
FROM iesqafile.opplan
LEFT OUTER JOIN iesqafile.order d
ON d.orodr# = opord#
LEFT OUTER JOIN ordermiles
ON mmord# = d.orodr#
LEFT OUTER JOIN firstequiprow
ON d.orodr# = oeord#
LEFT OUTER JOIN stopgroup
ON d.orodr# = stoporder
LEFT OUTER JOIN iesqafile.units
ON ununit = d.orpdrv
第一个错误是因为在您的两个主SELECT语句(UNIONed在一起(中，您有不同的列名-因此View不知道该调用它们什么，并要求您显式命名它们，例如每个语句中的第一列：
SELECT a.orodr# orodr_ ...
SELECT d.orodr# as ordddd ...
对于第二个错误，ORTIM列的数据类型是什么？
我猜是这种类型的构造导致了这个问题：
CASE orptim
WHEN 0
THEN Varchar(0)
ELSE CONCAT(CONCAT(SUBSTRING(orptim, 1, 2), ':'), SUBSTRING(orptim, 3, 4))
如果吸收比是一个数字/小数；当0〃；将起作用，但"；SUBSTRING(吸收比，1，2("；不会，因为你不能用一个数字的子串。如果吸收比是一个字符串；当0〃；w=可能造成问题。