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List: freetds
Subject: [freetds] Comment on change
From: ZIGLIO Frediano <Frediano.Ziglio () vodafoneomnitel ! it>
Date: 2003-03-05 14:56:26
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As steted yesterday some comment about Bill patch (follow a commented diff)
@ diff -u -u -1 -0 -b -r1.119 -r1.121
@ --- src/dblib/dblib.c 13 Feb 2003 21:25:11 -0000 1.119
@ +++ src/dblib/dblib.c 5 Mar 2003 09:46:31 -0000 1.121
@ @@ -1934,20 +1931,35 @@
@ if (is_blob_type(colinfo->column_type)) {
@ return (BYTE*) ((TDSBLOBINFO *) (resinfo->current_row +
colinfo->column_offset))->textvalue;
@ }
@
@ return (BYTE*) &resinfo->current_row[colinfo->column_offset];
@ }
@
@ RETCODE
@ dbcancel(DBPROCESS * dbproc)
@ {
@ +int marker;
@ +TDSSOCKET *tds;
@ +
@ + tds = (TDSSOCKET *) dbproc->tds_socket;
@ +
@ + while (tds->state != TDS_COMPLETED ) {
@ +
@ + marker = tds_get_byte(tds);
@ +
@ + tdsdump_log(TDS_DBG_INFO1, "%L dbcancel() discarding
results. marker is %x\n", marker);
@ +
@ + if (tds_process_default_tokens(tds, marker) == TDS_FAIL)
@ + return TDS_FAIL;
@ + }
@ +
@ tds_send_cancel(dbproc->tds_socket);
@ tds_process_cancel(dbproc->tds_socket);
@ return SUCCEED;
@ }
@
?? skipping data instead to send a proper cancel is quite bad... if server
is returning huge amount of data cancel take ages.... IMHO libtds (token.c)
should be encharge for processing cancel, not dblib.
@ @@ -3996,43 +4010,72 @@
@ }
@
@ RETCODE
@ dbsqlsend(DBPROCESS * dbproc)
@ {
@ int result = FAIL;
@ TDSSOCKET *tds;
@ char *cmdstr;
@ int rc;
@ TDS_INT result_type;
@ +unsigned char marker;
@ +int done_flags;
@ +int pending_error = 0;
@
@ dbproc->avail_flag = FALSE;
@ dbproc->envchange_rcv = 0;
@ dbproc->dbresults_state = DBRESINIT;
@
@ tdsdump_log(TDS_DBG_FUNC, "%L in dbsqlsend()\n");
@ tds = (TDSSOCKET *) dbproc->tds_socket;
@ - if (tds->res_info && tds->res_info->more_results) {
@ - /*
@ - * XXX If I read the documentation correctly it gets a
@ - * bit more complicated than this.
@ - *
@ - * You see if the person did a query and retrieved all
@ - * the rows but didn't call dbresults() and if the query
@ - * didn't return multiple results then this routine should
@ - * just end the TDS_DONE_TOKEN packet and be done with it.
@ - *
@ - * Unfortunately the only way we can know that is by peeking
@ - * ahead to the next byte. Peeking could block and this is
supposed
@ - * to be a non-blocking call.
@ - *
@ - */
@
@ + if (tds->state == TDS_PENDING) {
@ + _dblib_client_msg(dbproc, 20019, 7, "Attempt to initiate a
new SQL Server operation with results pending.");
@ + return FAIL;
@ + }
@ +
@ + if (tds->state == TDS_LASTROW) {
@ +
@ + while(tds->state != TDS_COMPLETED && !pending_error) {
@ +
@ + marker = tds_get_byte(tds);
@ +
@ + tdsdump_log(TDS_DBG_INFO1, "%L dbsqlsend state =
lastrow marker is %x\n", marker);
@ + switch (marker) {
@ + case TDS_DONE_TOKEN:
@ + case TDS_DONEPROC_TOKEN:
@ + case TDS_DONEINPROC_TOKEN:
@ + tds_process_end(tds, marker,
&done_flags);
@ + break;
@ + case TDS_RETURNSTATUS_TOKEN:
@ + tds->has_status = 1;
@ + tds->ret_status = tds_get_int(tds);
@ + break;
@ + case TDS_PARAM_TOKEN:
@ + tds_unget_byte(tds);
@ +
tds_process_param_result_tokens(tds);
@ + break;
@ + case TDS5_PARAMFMT_TOKEN:
@ + tds_process_dyn_result(tds);
@ + break;
@ + case TDS5_PARAMS_TOKEN:
@ +
tds_process_params_result_token(tds);
@ + break;
@ + default:
@ + _dblib_client_msg(dbproc, 20019, 7,
"Attempt to initiate a new SQL Server operation with results pending.");
@ + pending_error = 1;
@ +
@ + }
@ + }
@ + }
@ +
@ + if (pending_error) {
@ dbproc->command_state = DBCMDSENT;
@ result = FAIL;
@ } else {
I don't understand the state TDS_LASTROW... Why old code didn't work?
@ diff -u -u -1 -0 -b -r1.110 -r1.114
@ --- src/tds/convert.c 26 Jan 2003 10:27:36 -0000 1.110
@ +++ src/tds/convert.c 5 Mar 2003 13:14:31 -0000 1.114
@ @@ -1928,25 +1945,29 @@
@
@ case STRING_GARBLED:
@
@ tdsdump_log(TDS_DBG_INFO1,"error_handler: Attempt to
convert data stopped by syntax error in source field \n");
@ return TDS_CONVERT_SYNTAX;
@ }
@
@ tok = strtok_r((char *)NULL, " ,", &lasts);
@ }
@
@ + if (t->tm_year == 0 && t->tm_mon == 0 && t->tm_mday == 0) {
@ + dt_days = 0;
@ + } else {
@ i = (t->tm_mon - 13) / 12;
@ dt_days = 1461 * ( t->tm_year + 300 + i ) / 4 +
@ (367 * ( t->tm_mon - 1 - 12*i ) ) / 12 -
@ (3 * ( ( t->tm_year + 400 + i ) / 100 ) ) / 4 +
@ t->tm_mday - 109544;
@ + }
@
year == month == day == 0 ???
This seem a NULL value. tds_convert should not handle null values (library
dependent).
@ diff -u -u -1 -0 -b -r1.69 -r1.72
@ --- src/tds/query.c 26 Jan 2003 10:27:36 -0000 1.69
@ +++ src/tds/query.c 5 Mar 2003 13:14:32 -0000 1.72
@ @@ -417,24 +426,107 @@
@ * @return TDS_FAIL on error or TDS_SUCCEED
@ */
@ static int
@ tds_put_data(TDSSOCKET * tds, TDSCOLINFO * curcol, unsigned char
*current_row, int i)
@ {
@ unsigned char *src;
@ TDS_NUMERIC *num;
@ TDSBLOBINFO *blob_info;
@ int colsize;
@ int is_null;
@ + const unsigned char CHARBIN_NULL[] = { 0xff, 0xff };
@ + const unsigned char GEN_NULL = 0x00;
@ +
@ +/* I don't think this is working as tds_set_null is not being called
prior to this...
@ + I can't figure out how where I should call tds_set_null() anyway....
@
@ is_null = tds_get_null(current_row, i);
@ +*/
@ colsize = curcol->column_cur_size;
@ + if (colsize == 0)
@ + is_null = 1;
@ + else
@ + is_null = 0;
@ +
Bad. Think at empty and not null string (supported in TDS7+).
@ + tdsdump_log(TDS_DBG_INFO1, "%L tds_put_data: is_null = %d, colsize =
%d\n", is_null, colsize);
@ +
@ +
@ + if (IS_TDS7_PLUS(tds)) {
@ + src = &(current_row[curcol->column_offset]);
@ + if (is_null) {
@ +
@ + tdsdump_log(TDS_DBG_INFO1, "%L tds_put_data: null
param\n");
@ + switch(curcol->column_type) {
@ + case XSYBCHAR:
@ + case XSYBVARCHAR:
@ + case XSYBBINARY:
@ + case XSYBVARBINARY:
@ + case XSYBNCHAR:
@ + case XSYBNVARCHAR:
@ + tdsdump_log(TDS_DBG_INFO1, "%L
tds_put_data: putting CHARBIN_NULL\n");
@ + tds_put_n(tds, CHARBIN_NULL, 2);
@ + break;
@ + default:
@ + tdsdump_log(TDS_DBG_INFO1, "%L
tds_put_data: putting GEN_NULL\n");
@ + tds_put_byte(tds, GEN_NULL);
This do not take into account length (think at null text or image...)
@ + break;
@
@ + }
@ + } else {
@ + tdsdump_log(TDS_DBG_INFO1, "%L tds_put_data: not
null param varint_size = %d\n", curcol->column_varint_size);
@ + switch (curcol->column_varint_size) {
@ + case 4: /* Its a BLOB... */
@ + blob_info = (TDSBLOBINFO *) &
(current_row[curcol->column_offset]);
@ + tds_put_byte(tds, 16);
@ + tds_put_n(tds, blob_info->textptr, 16);
@ + tds_put_n(tds, blob_info->timestamp, 8);
@ + tds_put_int(tds, colsize);
@ + break;
@ + case 2:
@ + tds_put_smallint(tds, colsize);
@ + break;
@ + case 1:
@ + if (is_numeric_type(curcol->column_type))
@ + colsize =
tds_numeric_bytes_per_prec[((TDS_NUMERIC *) src)->precision];
@ + tds_put_byte(tds, colsize);
@ + break;
@ + case 0:
@ + colsize =
tds_get_size_by_type(curcol->column_type);
@ + break;
@ + }
@ +
@ + /* put real data */
@ + if (is_numeric_type(curcol->column_type)) {
@ + TDS_NUMERIC buf;
@ + num = (TDS_NUMERIC *) src;
@ + memcpy(&buf, num, sizeof(buf));
@ + tdsdump_log(TDS_DBG_INFO1, "%L swapping
numeric data...\n");
@ +
tds_swap_datatype(tds_get_conversion_type(curcol->column_type, colsize),
(unsigned char *) &buf);
@ + num = &buf;
@ + tds_put_n(tds, num->array, colsize);
@ + } else if (is_blob_type(curcol->column_type)) {
@ + blob_info = (TDSBLOBINFO *) src;
@ + tds_put_n(tds, blob_info->textvalue,
colsize);
@ + } else {
@ +#ifdef WORDS_BIGENDIAN
@ + unsigned char buf[64];
@ + if (tds->emul_little_endian &&
!is_numeric_type(curcol->column_type) && colsize < 64) {
@ + tdsdump_log(TDS_DBG_INFO1, "%L
swapping coltype %d\n", tds_get_conversion_type(curcol->column_type,
colsize));
@ + memcpy(buf, src, colsize);
@ +
tds_swap_datatype(tds_get_conversion_type(curcol->column_type, colsize),
buf);
@ + src = buf;
@ + }
@ +#endif
@ + tds_put_n(tds, src, colsize);
@ + }
@ + }
Seem a bit replicated (see also complete code in query.c) ...
@ + } else {
@ /* put size of data */
@ src = &(current_row[curcol->column_offset]);
@ switch (curcol->column_varint_size) {
@ case 4: /* Its a BLOB... */
@ blob_info = (TDSBLOBINFO *) &
(current_row[curcol->column_offset]);
@ if (!is_null) {
@ tds_put_byte(tds, 16);
@ tds_put_n(tds, blob_info->textptr, 16);
@ tds_put_n(tds, blob_info->timestamp, 8);
@ tds_put_int(tds, colsize);
freddy77
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