DB2 SQL 不区分大小写

Question

我正在通过 SQL Server 执行以下 DB2 SQL（因此需要在 DB2 SQL 中）：

exec ('
  select 
    TRIM (vhitno) AS "Item",
    TRIM (mmitds) AS "Description",
    TRIM (SUBSTRING (vhitno,12,4)) AS "Size",
    vhalqt AS "Available"
  from m3fdbtest.oagrln
    left outer join m3fdbtest.mdeohe 
      on vhcono = uwcono 
        and vhcuno = uwcuno 
        and vhagno = uwagno 
        and vhitno = uwobv1
    left outer join m3fdbtest.mitmas 
      ON vhcono = mmcono 
        AND vhitno = mmitno
    where uwcono = 1
      and uwstdt >= ?
      and uwlvdt <= ?
      and uwcuno = ''JBHE0001''
      and uwagst = ''20''
      and (vhitno LIKE ''%'' || ? || ''%''
        or mmitds LIKE ''%'' || ? || ''%'')',
  @From, @To, @Search, @Search) at M3_TEST_ODBC

但是，DB2 区分大小写 - 如何使 mmitds 和 vhitno 上的两个 LIKE 不区分大小写？

Answer 1

你可以使用这样的东西：

where UPPER(mycol) like '%' || UPPER(?) || '%'

注意：这可能会影响索引选择，但您可以像这样创建索引：

create index MYINDEX on MYTABLE (UPPER(mycol))

如果您使用 RPG 中嵌入的 SQL，则可以将程序设置为使用不区分大小写的排序和比较

SET OPTION SRTSEQ=*LANGIDSHR;

要使用 JDBC 执行此操作，您需要设置以下驱动程序属性：

"sort" = "language"
"sort language" = Your language code, I use "ENU"
"sort weight" = "shared"

对于 ODBC 连接，您需要设置以下连接属性：

SORTTYPE = 2
LANGUAGE = your language code, I use ENU
SORTWEIGHT = 0