Re: [ODBC] New bug or regression between 9.6 releases 0410 and 0310 - Mailing list pgsql-odbc

Hi Matej,

Thanks for the report.
Please give me some time.

regards,
Hiroshi Inoue

On 2017/08/03 21:55, Matej Mihelič wrote:

* New bug or regression between 9.6 releases 0410 and 0310

Win64/Win32 ODBC: With the 0410 release we are seeing a ODBC manager error "[Microsoft][ODBC Driver Manager] Invalid string or buffer length" on a particular row when fetching a BYTEA field. This was a single field SELECT. We can read the value from all preceding rows so it to do something with this field value.

The error disappears when we revert back to the 0310 ODBC release.

I can send you the exact value of the BLOB in a private email if necessary. I've double check the following:

a) LENGTH(contents) from the database does return the expected length: 25560.

b) I took the hex- encoded value from the log file and compared it with the value in the database. The value is the same.
( select LENGTH(contents)=length(test) LenIsEqual, contents=test as ContentIsEqual, * from ( select contents, CAST(E'\\xff0a0054465... )



Excerpt from the log:


[6976-45.657]ColAttSet in
[6976-45.657]updatable=1 tab=1 fields=1[6976-45.657]->1
[6976-45.657]PARSE: searchColInfo by attnum=5
[6976-45.657]PARSE: fieldtype=17, col_name='contents', column_size=-4
[6976-45.658]describeCol: col 0 fieldname = 'contents'
[6976-45.658]describeCol: col 0 fieldtype = 17
[6976-45.658]describeCol: col 0 column_size = -4
[6976-45.658]describeCol: col 0 *pfSqlType = -4
[6976-45.658]describeCol: col 0  *pcbColDef = 0
[6976-45.658]describeCol: col 0  *pibScale = 0
[6976-45.658]describeCol: col 0  *pfNullable = 1
[6976-45.659]DiscardStatementSvp:in_progress=0 previous=0
[6976-45.659][SQLBindCol][6976-45.659]PGAPI_BindCol: entering...
[6976-45.659]**** PGAPI_BindCol: stmt = 044D2F00, icol = 1
[6976-45.659]**** : fCType=-2 rgb=00000000 valusMax=0 pcb=03623A84
[6976-45.659]extend_getdata_info: entering ... self=044D3088, gdata_allocated=0, num_columns=1
[6976-45.660]exit extend_gdata_info=044D79C8
[6976-45.660][SQLNumResultCols][6976-45.660]PGAPI_NumResultCols: entering...
[6976-45.660]SC_describe: status = 3
[6976-45.660]PGAPI_NumResultCols: result = 04473E90, status = 3, numcols = 1
[6976-45.661][[SQLGetDiagField]] Handle=(3,044D2F00) Rec=1 Id=12 info=(06C1FD2C,-6)
[6976-45.661]PGAPI_GetDiagField entering rec=1[6976-45.661]PGAPI_GetDiagField exiting -1
[6976-45.661][SQLDescribeCol][6976-45.661]PGAPI_DescribeCol: entering.1..
[6976-45.661]PARSE: fieldtype=17, col_name='contents', column_size=-4
[6976-45.661]describeCol: col 0 fieldname = 'contents'
[6976-45.662]describeCol: col 0 fieldtype = 17
[6976-45.662]describeCol: col 0 column_size = -4
[6976-45.662]describeCol: col 0 *pfSqlType = -4
[6976-45.662]describeCol: col 0  *pcbColDef = 0
[6976-45.662]describeCol: col 0  *pibScale = 0
[6976-45.662]describeCol: col 0  *pfNullable = 1
[6976-45.663][SQLFreeStmt][6976-45.663]PGAPI_FreeStmt: entering...hstmt=044D2F00, fOption=2
[6976-45.663]reset_a_column_binding: entering ... self=044D2F90, bindings_allocated=1, icol=1
[6976-45.663][SQLRowCount][6976-45.663]PGAPI_RowCount: entering...
[6976-45.663]RowCount=-1
[6976-45.663][SQLBindCol][6976-45.664]PGAPI_BindCol: entering...
[6976-45.664]**** PGAPI_BindCol: stmt = 044D2F00, icol = 1
[6976-45.664]**** : fCType=-2 rgb=00000000 valusMax=0 pcb=03623A84
[6976-45.664][[SQLFetch]][6976-45.664]PGAPI_ExtendedFetch: stmt=044D2F00 rowsetSize=1
[6976-45.664]SQL_FETCH_NEXT: num_tuples=2147483647, currtuple=-1, rowst=-1
[6976-45.665]PGAPI_ExtendedFetch: new currTuple = -1
[6976-45.665]fetch_cursor=1, 04473E90->total_read=100
[6976-45.665]QR_next_tuple: fetch_number < fcount: returning tuple 0, fcount = 100
[6976-45.665]fetch: cols=1, lf=0, opts = 044D2F90, opts->bindings = 044D79A8, buffer[] = 00000000
[6976-45.665][SQLGetData][6976-45.665]PGAPI_GetData: enter, stmt=044D2F00 icol=1
[6976-45.666]  socket: value = '\xff0a005446524d4142435f534b4c455049003010b825000054504630f10e5466726d4142435f736b6c6570690d66726d4142435f736b6c657069044c65667403b20203546f7003ea000743617074696f6e062d536b72626e696b20696e20646174756d206f6264656c616e65676120
...
20546f70203d203136320d0a2020656e640d0a656e640d0a'
[6976-45.817]**** PGAPI_GetData: icol = 0, target_type = -2, field_type = 17, value = '\xff0a005446524d4142435f534b4c455049003010b825000054504630f10e5466726d4142435f736b6c6570690d66726d4142435f736b6c657069044c65667403b20203546f7003ea000743617074696f6e062d536b72626e696b20696e20646174756d206f6264656c616e65676120
...
20546f70203d203136320d0a2020656e640d0a656e640d0a'
[6976-45.968]copy_and_convert: field_type = 17, fctype = -2, value = '\xff0a005446524d4142435f534b4c455049003010b825000054504630f10e5466726d4142435f736b6c6570690d66726d4142435f736b6c657069044c65667403b20203546f7003ea000743617074696f6e062d536b72626e696b20696e20646174756d206f6264656c616e65676120
...
20546f70203d203136320d0a2020656e640d0a656e640d0a', cbValueMax=32752
[6976-46.123]convert_text_field_to_sql_c:field_type=17 type=-2
[6976-46.123]convert_from_pgbinary: in=51120, out = 25560
[6976-46.123]convert_from_pgbinary: in=51120, out = 25560
[6976-46.124]DEFAULT: len = 25560, ptr = '��[6976-46.124]    SQL_C_BINARY, default: len = 25560, cbValueMax = 32752, rgbValueBindRow = '��[6976-46.124]STATEMENT WARNING: func=PGAPI_GetData, desc='', errnum=-2, errmsg='The buffer was too small for the GetData.'
[6976-46.125][SQLCancel][6976-46.125]PGAPI_Cancel: entering...
[6736-54.703][SQLFreeStmt][6736-54.703]PGAPI_FreeStmt: entering...hstmt=044D2F00, fOption=0
[6736-54.703]SC_recycle_statement: self= 044D2F00
[6736-54.703]!!!refcnt 044DA020:1 -> 0
[6736-54.703]SC_set_Result(44d2f00, 0)[6736-54.704]QResult: enter DESTRUCTOR

-- Regards, Matej.