可以使用 substring (field.name,1,maxlength) 选项创建视图并使用 PUB2.viewname 代替 pub.tablename
DROP VIEW PUB2."accounts";
CREATE VIEW PUB2."accounts" (
"ACC-TYPE",
"ACCOUNT-NAME",
ANALITIC,
ARCH,
COUNT1,
CURRENCY,
PLAN,
QUANTITY,
"RID-ANOBJECT",
"RID-APP",
TRANSIT )
AS select "acc-type",
SUBSTRING("account-name", 1, 130),
"analitic",
"arch",
"count1",
"currency",
"plan",
"quantity",
"rid-anobject",
"rid-app",
"transit"
FROM PUB."accounts";
COMMIT;
使用 sqlexp 进行自动创建：
sqlexp account -H localhost -S ' + db-port + ' -user sysprogress -password sysprogress -infile recreateSQLviews.sql -outfile recreateSQLviews.log
代码如下：
def var num-port as integer.
for first _Servers where _Servers._Server-Type = "Login" no-lock:
num-port = _Servers._Server-PortNum.
end.
if num-port < 0 then num-port = num-port + 65536.
if num-port = 0 then do:
message "Define -S parameter for Database" view-as alert-box.
RETURN.
end.
message num-port.
/* ttSQLWidth table: SQL WIDTH for all tables */
def var execstr as char.
def var rez-str as char.
def var db-port as char. /* -S port */
db-port = STRING(num-port).
DEFINE TEMP-TABLE ttSQLWidth NO-UNDO
FIELD tableName AS CHARACTER
FIELD tableNum AS INTEGER
FIELD fieldName AS CHARACTER
FIELD sqlWidth AS INTEGER
FIELD requireFix AS LOGICAL INIT FALSE
FIELD actualWidth AS INTEGER
FIELD newWidth AS INTEGER
INDEX tableNum tableNum
INDEX tableName tableName.
FOR EACH _File NO-LOCK WHERE _Tbl-Type = "T":
FOR EACH _Field OF _File WHERE _Field._Data-type = "character":
if _field._extent > 0 then next.
CREATE ttSQLWidth.
ASSIGN tableName = _File._File-name
tableNum = _File._File-num
fieldName = _Field._Field-name
sqlWidth = _Field._Width.
RELEASE ttSQLWidth.
END. /* FOR EACH _Field */
END. /* FOR EACH _File */
DEFINE VARIABLE bTab AS HANDLE NO-UNDO.
DEFINE VARIABLE hQuery AS HANDLE NO-UNDO.
DEFINE VARIABLE queryString AS CHARACTER NO-UNDO.
FOR EACH ttSQLWidth:
CREATE BUFFER bTab FOR TABLE tableName.
CREATE QUERY hQuery.
hQuery:ADD-BUFFER(bTab).
message tablename.
queryString = "FOR EACH " + tableName + " WHERE LENGTH(" + fieldName + ") >= " + STRING(sqlWidth) + " BY LENGTH(" + fieldName + ") DESC".
hQuery:QUERY-PREPARE(queryString).
hQuery:QUERY-OPEN().
IF hQuery:GET-NEXT() THEN DO:
ASSIGN actualWidth = LENGTH(bTab:BUFFER-FIELD(fieldName):BUFFER-VALUE)
requireFix = TRUE.
END. /* IF .. THEN DO */
hQuery:QUERY-CLOSE.
DELETE OBJECT hQuery.
bTab:BUFFER-RELEASE().
DELETE OBJECT bTab.
END. /* FOR EACH ttSQLWidth */
def var add-pr as integer initial 10. /* % from max */
def var maxWidth as integer initial 249. /* maxwidth */
FOR EACH ttSQLWidth WHERE ttSQLWidth.requireFix = TRUE:
ttSQLWidth.newWidth = TRUNCATE ( (ttSQLWidth.actualWidth + add-pr) / add-pr, 0 ) * add-pr.
ttSQLWidth.newWidth = INTEGER( ttSQLWidth.newWidth).
if ttSQLWidth.newWidth > maxWidth then ttSQLWidth.newWidth = maxWidth.
END.
/* sql script generation */
OUTPUT TO value("recreateSQLviews.sql").
def var lst-field as char.
FOR EACH ttSQLWidth WHERE BREAK BY ttSQLWidth.tableName:
IF FIRST-OF(ttSQLWidth.tableName)
THEN run MakeSQLViews(ttSQLWidth.tableName).
END.
OUTPUT CLOSE.
/* sql script execution */
execstr = 'sqlexp account -H localhost -S ' + db-port + ' -user sysprogress -password sysprogress -infile recreateSQLviews.sql -outfile recreateSQLviews.log'.
input through value(execstr).
repeat:
IMPORT UNFORMAT rez-str.
message rez-str.
end.
INPUT CLOSE.
RETURN.
PROCEDURE MakeSQLViews:
define input parameter tableName as character.
def var str_tmp as char.
def var str_tmp1 as char.
def var str as char initial "count,sum,double,row,date,level,area,number,primary".
def var fieldName as char.
def var fieldName1 as char.
FOR EACH _file WHERE _file._file-name = tableName AND
_file._file-num GT 0 AND _file._file-num LT 32000 NO-LOCK:
fieldName = "".
FOR EACH _Field OF _File NO-LOCK:
str_tmp = '"' + _Field._Field-name + '"'.
FOR FIRST ttSQLWidth where ttSQLWidth.tableName = _file._file-name and
ttSQLWidth.fieldName = _Field._Field-name and
ttSQLWidth.requireFix = TRUE:
str_tmp = 'SUBSTRING("' + _Field._Field-name + '", 1, ' + STRING(ttSQLWidth.newWidth) + ')'.
END.
fieldName = fieldName + (IF(fieldName = "") THEN ("") ELSE ("," + chr(10) + chr(9))) + str_tmp.
str_tmp1 = ( IF ( INDEX ( _Field._Field-name, "-" ) = 0 )
THEN ( _Field._Field-name )
ELSE ( '"' + _Field._Field-name + '"' )).
if LOOKUP ( _Field._Field-name, str, "," ) > 0 then str_tmp1 = '"' + _Field._Field-name + '"'.
fieldName1 = fieldName1 + (IF(fieldName1 = "") THEN ("") ELSE ("," + chr(10) + chr(9))) + UPPER(str_tmp1).
END. /* FOR EACH _Field */
PUT UNFORMATTED 'DROP VIEW PUB2."' + _file._file-name + '";' SKIP.
PUT UNFORMATTED 'CREATE VIEW PUB2."' + _file._file-name + '" ( ' + chr(10) chr(9) + fieldName1 + ' ) ' + chr(10) +
'AS select ' + fieldName + chr(10) +
'FROM PUB."' + _file._file-name + '";' SKIP.
PUT UNFORMATTED 'COMMIT;' SKIP(1).
END.
END.