I enabled ODBC trace . Attached trace log. Had to edit connection details and
snipped few repetitive lines as I ran the same sql multiple times
Connection Out [DSN=BLUE;UID=*;PWD=***;DATABASE=***;HOST...]
[ODBC][4248][1539734369.611042][SQLGetInfo.c][554]
Entry:
Connection = 0x2150e90
Info Type = SQL_IDENTIFIER_QUOTE_CHAR (29)
Info Value = 0x7ffdaf8700ee
Buffer Length = 2
StrLen = (nil)
[ODBC][4248][1539734369.611055][SQLGetInfo.c][617]
Exit:[SQL_SUCCESS]
[ODBC][4248][1539734369.611067][SQLGetInfo.c][554]
Entry:
Connection = 0x2150e90
Info Type = SQL_CATALOG_NAME_SEPARATOR (41)
Info Value = 0x7ffdaf8700ee
Buffer Length = 2
StrLen = (nil)
[ODBC][4248][1539734369.611075][SQLGetInfo.c][617]
Exit:[SQL_SUCCESS]
[ODBC][4248][1539734369.611092][SQLAllocHandle.c][540]
Entry:
Handle Type = 3
Input Handle = 0x2150e90
[ODBC][4248][1539734369.611122][SQLAllocHandle.c][1081]
Exit:[SQL_SUCCESS]
Output Handle = 0x2167610
[ODBC][4248][1539734369.611138][SQLExecDirect.c][240]
Entry:
Statement = 0x2167610
SQL = [select fld1,fld2 from rkrishna.fdwtest][length =
38 (SQL_NTS)]
[ODBC][4248][1539734369.612221][SQLExecDirect.c][503]
Exit:[SQL_SUCCESS]
[ODBC][4248][1539734369.612242][SQLNumResultCols.c][156]
Entry:
Statement = 0x2167610
Column Count = 0x7ffdaf87015e
[ODBC][4248][1539734369.612257][SQLNumResultCols.c][248]
Exit:[SQL_SUCCESS]
Count = 0x7ffdaf87015e -> 2
[ODBC][4248][1539734369.612282][SQLFetch.c][162]
Entry:
Statement = 0x2167610
[ODBC][4248][1539734369.612303][SQLFetch.c][348]
Exit:[SQL_SUCCESS]
[ODBC][4248][1539734369.612314][SQLNumResultCols.c][156]
Entry:
Statement = 0x2167610
Column Count = 0x7ffdaf8701ca
[ODBC][4248][1539734369.612321][SQLNumResultCols.c][248]
Exit:[SQL_SUCCESS]
Count = 0x7ffdaf8701ca -> 2
[ODBC][4248][1539734369.612334][SQLDescribeCol.c][247]
Entry:
Statement = 0x2167610
Column Number = 1
Column Name = 0x2164b78
Buffer Length = 255
Name Length = 0x7ffdaf8701cc
Data Type = 0x7ffdaf8701ce
Column Size = 0x7ffdaf8701d8
Decimal Digits = 0x7ffdaf8701d0
Nullable = 0x7ffdaf8701d2
[ODBC][4248][1539734369.612394][SQLDescribeCol.c][497]
Exit:[SQL_SUCCESS]
Column Name = [FLD1]
Data Type = 0x7ffdaf8701ce -> 4
Column Size = 0x7ffdaf8701d8 -> 10
Decimal Digits = 0x7ffdaf8701d0 -> 0
Nullable = 0x7ffdaf8701d2 -> 1
[ODBC][4248][1539734369.612409][SQLDescribeCol.c][247]
Entry:
Statement = 0x2167610
Column Number = 2
Column Name = 0x2164b78
Buffer Length = 255
Name Length = 0x7ffdaf8701cc
Data Type = 0x7ffdaf8701ce
Column Size = 0x7ffdaf8701d8
Decimal Digits = 0x7ffdaf8701d0
Nullable = 0x7ffdaf8701d2
[ODBC][4248][1539734369.612419][SQLDescribeCol.c][497]
Exit:[SQL_SUCCESS]
Column Name = [FLD2]
Data Type = 0x7ffdaf8701ce -> 1
Column Size = 0x7ffdaf8701d8 -> 1
Decimal Digits = 0x7ffdaf8701d0 -> 0
Nullable = 0x7ffdaf8701d2 -> 1
[ODBC][4787][1539734703.466709][__handles.c][460]
Exit:[SQL_SUCCESS]
Environment = 0x2432cd0
[ODBC][4787][1539734703.466760][SQLSetEnvAttr.c][189]
Entry:
Environment = 0x2432cd0
Attribute = SQL_ATTR_ODBC_VERSION
Value = 0x3
StrLen = 0
[ODBC][4787][1539734703.466769][SQLSetEnvAttr.c][363]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734703.466776][SQLAllocHandle.c][375]
Entry:
Handle Type = 2
Input Handle = 0x2432cd0
[ODBC][4787][1539734703.466783][SQLAllocHandle.c][493]
Exit:[SQL_SUCCESS]
Output Handle = 0x24bc7f0
[ODBC][4787][1539734703.466794][SQLDriverConnect.c][726]
Entry:
Connection = 0x24bc7f0
Window Hdl = (nil)
Str In = [DSN=BLUE][length = 8 (SQL_NTS)]
Str Out = 0x7ffec5a2d370
Str Out Max = 1024
Str Out Ptr = 0x7ffec5a2d34e
Completion = 1
UNICODE Using encoding ASCII 'ISO8859-1' and UNICODE ''
connection details removed.
[ODBC][4787][1539734705.934065][SQLAllocHandle.c][540]
Entry:
Handle Type = 3
Input Handle = 0x24bc7f0
[ODBC][4787][1539734705.934091][SQLAllocHandle.c][1081]
Exit:[SQL_SUCCESS]
Output Handle = 0x24fc9e0
[ODBC][4787][1539734705.934106][SQLExecDirect.c][240]
Entry:
Statement = 0x24fc9e0
SQL = [select count(*) from rkrishna.fdwtest][length =
37 (SQL_NTS)]
[ODBC][4787][1539734705.935348][SQLExecDirect.c][503]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734705.935389][SQLFetch.c][162]
Entry:
Statement = 0x24fc9e0
[ODBC][4787][1539734705.935431][SQLFetch.c][348]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734705.935466][SQLGetData.c][237]
Entry:
Statement = 0x24fc9e0
Column Number = 1
Target Type = -27 SQL_C_SBIGINT
Buffer Length = 0
Target Value = 0x7ffec5a2d7d0
StrLen Or Ind = 0x7ffec5a2d7d8
[ODBC][4787][1539734705.935515][SQLGetData.c][501]
Exit:[SQL_SUCCESS]
Buffer = [Data...]
Strlen Or Ind = 0x7ffec5a2d7d8 -> 8
[ODBC][4787][1539734705.935552][SQLFreeHandle.c][381]
Entry:
Handle Type = 3
Input Handle = 0x24fc9e0
[ODBC][4787][1539734705.936176][SQLFreeHandle.c][491]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734705.936195][SQLFreeHandle.c][284]
Entry:
Handle Type = 2
Input Handle = 0x24bc7f0
[ODBC][4787][1539734705.936205][SQLFreeHandle.c][298]Error: HY010
[ODBC][4787][1539734705.936222][SQLFreeHandle.c][219]
Entry:
Handle Type = 1
Input Handle = 0x2432cd0
[ODBC][4787][1539734705.936233][SQLFreeHandle.c][233]Error: HY010
[ODBC][4787][1539734705.936362][__handles.c][460]
Exit:[SQL_SUCCESS]
Environment = 0x24fbb30
[ODBC][4787][1539734705.936407][SQLSetEnvAttr.c][189]
Entry:
Environment = 0x24fbb30
Attribute = SQL_ATTR_ODBC_VERSION
Value = 0x3
StrLen = 0
[ODBC][4787][1539734705.936419][SQLSetEnvAttr.c][363]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734705.936431][SQLAllocHandle.c][375]
Entry:
Handle Type = 2
Input Handle = 0x24fbb30
[ODBC][4787][1539734705.936453][SQLAllocHandle.c][493]
Exit:[SQL_SUCCESS]
Output Handle = 0x2526b90
[ODBC][4787][1539734705.936466][SQLDriverConnect.c][726]
Entry:
Connection = 0x2526b90
Window Hdl = (nil)
Str In = [DSN=BLUE][length = 8 (SQL_NTS)]
Str Out = 0x7ffec5a2d3a0
Str Out Max = 1024
Str Out Ptr = 0x7ffec5a2d37e
Completion = 1
UNICODE Using encoding ASCII 'ISO8859-1' and UNICODE ''
[ODBC][4787][1539734708.340223][SQLExecDirect.c][240]
Entry:
Statement = 0x24fe2e0
SQL = [select count(*) from rkrishna.fdwtest][length =
37 (SQL_NTS)]
[ODBC][4787][1539734708.380473][SQLExecDirect.c][503]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734708.380501][SQLFetch.c][162]
Entry:
Statement = 0x24fe2e0
[ODBC][4787][1539734708.380523][SQLFetch.c][348]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734708.380536][SQLGetData.c][237]
Entry:
Statement = 0x24fe2e0
Column Number = 1
Target Type = -27 SQL_C_SBIGINT
Buffer Length = 0
Target Value = 0x7ffec5a2d800
StrLen Or Ind = 0x7ffec5a2d808
[ODBC][4787][1539734708.380555][SQLGetData.c][501]
Exit:[SQL_SUCCESS]
Buffer = [Data...]
Strlen Or Ind = 0x7ffec5a2d808 -> 8
[ODBC][4787][1539734708.380567][SQLFreeHandle.c][381]
Entry:
Handle Type = 3
Input Handle = 0x24fe2e0
[ODBC][4787][1539734708.381263][SQLFreeHandle.c][491]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734708.381281][SQLFreeHandle.c][284]
Entry:
Handle Type = 2
Input Handle = 0x2526b90
[ODBC][4787][1539734708.381292][SQLFreeHandle.c][298]Error: HY010
[ODBC][4787][1539734708.381314][SQLFreeHandle.c][219]
Entry:
Handle Type = 1
Input Handle = 0x24fbb30
[ODBC][4787][1539734708.381326][SQLFreeHandle.c][233]Error: HY010
[ODBC][4787][1539734708.381400][__handles.c][460]
Exit:[SQL_SUCCESS]
Environment = 0x2519280
[ODBC][4787][1539734708.381418][SQLSetEnvAttr.c][189]
Entry:
Environment = 0x2519280
Attribute = SQL_ATTR_ODBC_VERSION
Value = 0x3
StrLen = 0
[ODBC][4787][1539734708.381429][SQLSetEnvAttr.c][363]
Exit:[SQL_SUCCESS]
[ODBC][4787][1539734708.381440][SQLAllocHandle.c][375]
Entry:
Handle Type = 2
Input Handle = 0x2519280
[ODBC][4787][1539734708.381452][SQLAllocHandle.c][493]
Exit:[SQL_SUCCESS]
Output Handle = 0x253d320
[ODBC][4787][1539734708.381465][SQLDriverConnect.c][726]
Entry:
Connection = 0x253d320
Window Hdl = (nil)
Str In = [DSN=BLUE][length = 8 (SQL_NTS)]
Str Out = 0x7ffec5a2d5b0
Str Out Max = 1024
Str Out Ptr = 0x7ffec5a2d58e
Completion = 1
UNICODE Using encoding ASCII 'ISO8859-1' and UNICODE ''
