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Bug#45197 cp1250 character set with IBMDB2I generates 2027 error

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Running a SELECT query over an IBMDB2I table with a cp1250 character set
was producing an error 2027 (ibmdb2i error 2027: Error converting single-byte
sort sequence to UCS-2).

The QMY_DESCRIBE_RANGE API was returning error 2027 to the storage engine
because the CCSID used for a cp1250 column (870) does not match the CCSID
used by the DB2 sort sequences associated with cp1250_* collations (1153).
This was because the storage engine relies on a set of system APIs to
determine which CCSID value most closely matches a particular MySQL
character set. However, in the case of cp1250, the system is returning
CCSID 870, which does not have a codepoint for the euro symbol, making it
an incorrect match.

This patch overrides the selection of a compatible CCSID to always return
1153 for cp1250.

storage/ibmdb2i/db2i_charsetSupport.cc:
  Bug#45197 cp1250 character set with IBMDB2I generates 2027 error
  
  override the selection of a compatible CCSID to
  always return 1153 for cp1250.
This commit is contained in:
Narayanan V 2009-06-01 12:52:10 +05:30
parent 76e12894dc
commit 094ddf2266
1 changed files with 11 additions and 1 deletions
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12
storage/ibmdb2i/db2i_charsetSupport.cc
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@ -245,11 +245,16 @@ static int32 getNewTextDesc(const int32 inType,
else if ((inType == Qlg_TypeAS400CCSID) && (outType == Qlg_TypeAix41))
{
// Override non-standard charsets
if (unlikely(strcmp("1148", in) == 0))
if (strcmp("1148", in) == 0)
{
strcpy(out, "IBM-1148");
DBUG_RETURN(0);
}
else if (unlikely(strcmp("1153", in) == 0))
{
strcpy(out, "IBM-1153");
DBUG_RETURN(0);
}
}
char argBuf[sizeof(ArgList)+15];
@ -583,6 +588,11 @@ int32 getAssociatedCCSID(const uint16 inCcsid, const int inEncodingScheme, uint1
*outCcsid = 1148;
DBUG_RETURN(0);
}
else if ((inCcsid == 1250) && (inEncodingScheme == 0x1100))
{
*outCcsid = 1153;
DBUG_RETURN(0);
}
if (!ptrInited)
{