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fcl-db: odbc: map ftWord fields to TWordField (avoid potential problem with Big Endian systems)

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git-svn-id: trunk@25035 -
This commit is contained in:
lacak 2013-07-04 06:46:45 +00:00
parent 3505ba4ee6
commit 206e5eb475
1 changed files with 24 additions and 23 deletions
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47
packages/fcl-db/src/sqldb/odbc/odbcconn.pas
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@ -843,8 +843,10 @@ begin
Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_CHAR, buffer, FieldDef.Size+1, @StrLenOrInd); Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_CHAR, buffer, FieldDef.Size+1, @StrLenOrInd);
ftSmallint: // mapped to TSmallintField ftSmallint: // mapped to TSmallintField
Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_SSHORT, buffer, SizeOf(Smallint), @StrLenOrInd); Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_SSHORT, buffer, SizeOf(Smallint), @StrLenOrInd);
ftInteger,ftWord,ftAutoInc: // mapped to TLongintField ftInteger,ftAutoInc: // mapped to TLongintField
Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_SLONG, buffer, SizeOf(Longint), @StrLenOrInd); Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_SLONG, buffer, SizeOf(Longint), @StrLenOrInd);
ftWord: // mapped to TWordField
Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_USHORT, buffer, SizeOf(Word), @StrLenOrInd);
ftLargeint: // mapped to TLargeintField ftLargeint: // mapped to TLargeintField
Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_SBIGINT, buffer, SizeOf(Largeint), @StrLenOrInd); Res:=SQLGetData(ODBCCursor.FSTMTHandle, FieldDef.Index+1, SQL_C_SBIGINT, buffer, SizeOf(Largeint), @StrLenOrInd);
ftFloat,ftCurrency: // mapped to TFloatField ftFloat,ftCurrency: // mapped to TFloatField
@ -1088,7 +1090,7 @@ var
ColName,TypeName:string; ColName,TypeName:string;
FieldType:TFieldType; FieldType:TFieldType;
FieldSize:word; FieldSize:word;
AutoIncAttr, Updatable, FixedPrecScale, Unsigned: SQLLEN; AutoIncAttr, FixedPrecScale, Unsigned, Updatable: SQLLEN;
begin begin
ODBCCursor:=cursor as TODBCCursor; ODBCCursor:=cursor as TODBCCursor;
@ -1195,7 +1197,6 @@ begin
// only one column per table can have identity attr. // only one column per table can have identity attr.
if (FieldType in [ftInteger,ftLargeInt]) and (AutoIncAttr=SQL_FALSE) then if (FieldType in [ftInteger,ftLargeInt]) and (AutoIncAttr=SQL_FALSE) then
begin begin
AutoIncAttr:=0;
ODBCCheckResult( ODBCCheckResult(
SQLColAttribute(ODBCCursor.FSTMTHandle, // statement handle SQLColAttribute(ODBCCursor.FSTMTHandle, // statement handle
i, // column number i, // column number
@ -1208,20 +1209,8 @@ begin
); );
if (AutoIncAttr=SQL_TRUE) and (FieldType=ftInteger) then if (AutoIncAttr=SQL_TRUE) and (FieldType=ftInteger) then
FieldType:=ftAutoInc; FieldType:=ftAutoInc;
end; end
else
Updatable:=0;
ODBCCheckResult(
SQLColAttribute(ODBCCursor.FSTMTHandle,
i,
SQL_DESC_UPDATABLE,
nil,
0,
nil,
@Updatable),
SQL_HANDLE_STMT, ODBCCursor.FSTMTHandle, 'Could not get updatable attribute for column %d.',[i]
);
if FieldType in [ftFloat] then if FieldType in [ftFloat] then
begin begin
FixedPrecScale:=0; FixedPrecScale:=0;
@ -1250,14 +1239,26 @@ begin
0, 0,
nil, nil,
@Unsigned), @Unsigned),
SQL_HANDLE_STMT, ODBCCursor.FSTMTHandle, 'Could not get unsigned attribute for column %d.',[i] SQL_HANDLE_STMT, ODBCCursor.FSTMTHandle, 'Could not get unsigned attribute for column %d.',[i]
); );
if Unsigned=SQL_TRUE then if Unsigned=SQL_TRUE then
case FieldType of case FieldType of
ftSmallint: FieldType:=ftWord; ftSmallint: FieldType:=ftWord;
end; end;
end; end;
Updatable:=0;
ODBCCheckResult(
SQLColAttribute(ODBCCursor.FSTMTHandle,
i,
SQL_DESC_UPDATABLE,
nil,
0,
nil,
@Updatable),
SQL_HANDLE_STMT, ODBCCursor.FSTMTHandle, 'Could not get updatable attribute for column %d.',[i]
);
if FieldType=ftUnknown then // if unknown field type encountered, try finding more specific information about the ODBC SQL DataType if FieldType=ftUnknown then // if unknown field type encountered, try finding more specific information about the ODBC SQL DataType
begin begin
SetLength(TypeName,TypeNameDefaultLength); // also garantuees uniqueness SetLength(TypeName,TypeNameDefaultLength); // also garantuees uniqueness