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cmp.cpp
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cmp.cpp
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/*
* PROGRAM: JRD Access Method
* MODULE: cmp.cpp
* DESCRIPTION: Request compiler
*
* The contents of this file are subject to the Interbase Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy
* of the License at http://www.Inprise.com/IPL.html
*
* Software distributed under the License is distributed on an
* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
* or implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code was created by Inprise Corporation
* and its predecessors. Portions created by Inprise Corporation are
* Copyright (C) Inprise Corporation.
*
* All Rights Reserved.
* Contributor(s): ______________________________________.
*
* 2001.07.28: John Bellardo: Added code to handle rse_skip.
* 2001.07.17 Claudio Valderrama: Stop crash when parsing user-supplied SQL plan.
* 2001.10.04 Claudio Valderrama: Fix annoying & invalid server complaint about
* triggers not having REFERENCES privilege over their owner table.
* 2002.02.24 Claudio Valderrama: substring() should signal output as string even
* if source is blob and should check implementation limits on field lengths.
* 2002.02.25 Claudio Valderrama: concatenate() should be a civilized function.
* This closes the heart of SF Bug #518282.
* 2002.09.28 Dmitry Yemanov: Reworked internal_info stuff, enhanced
* exception handling in SPs/triggers,
* implemented ROWS_AFFECTED system variable
* 2002.10.21 Nickolay Samofatov: Added support for explicit pessimistic locks
* 2002.10.29 Nickolay Samofatov: Added support for savepoints
* 2002.10.29 Sean Leyne - Removed obsolete "Netware" port
* 2002.10.30 Sean Leyne - Removed support for obsolete "PC_PLATFORM" define
* 2003.10.05 Dmitry Yemanov: Added support for explicit cursors in PSQL
* Adriano dos Santos Fernandes
*/
#include "firebird.h"
#include <string.h>
#include <stdlib.h> // abort
#include "../jrd/common.h"
#include "../jrd/ibase.h"
#include "../jrd/jrd.h"
#include "../jrd/sym.h"
#include "../jrd/req.h"
#include "../jrd/val.h"
#include "../jrd/align.h"
#include "../jrd/lls.h"
#include "../jrd/exe.h"
#include "../jrd/rse.h"
#include "../jrd/scl.h"
#include "../jrd/tra.h"
#include "../jrd/all.h"
#include "../jrd/lck.h"
#include "../jrd/irq.h"
#include "../jrd/drq.h"
//#include "../jrd/license.h"
#include "../jrd/intl.h"
#include "../jrd/btr.h"
#include "../jrd/gdsassert.h"
#include "../jrd/cmp_proto.h"
#include "../jrd/dsc_proto.h"
#include "../jrd/err_proto.h"
#include "../jrd/exe_proto.h"
#include "../jrd/fun_proto.h"
#include "../jrd/gds_proto.h"
#include "../jrd/idx_proto.h"
#include "../jrd/intl_proto.h"
#include "../jrd/jrd_proto.h"
#include "../jrd/lck_proto.h"
#include "../jrd/opt_proto.h"
#include "../jrd/par_proto.h"
#include "../jrd/scl_proto.h"
#include "../jrd/thd.h"
#include "../jrd/met_proto.h"
#include "../jrd/mov_proto.h"
#include "../jrd/dsc_proto.h"
#include "../jrd/dbg_proto.h" // DBG_supervisor
#include "../jrd/execute_statement.h"
#include "../jrd/DataTypeUtil.h"
#include "../jrd/SysFunction.h"
/* Pick up relation ids */
#include "../jrd/ini.h"
/* Firebird provides transparent conversion from string to date in
* contexts where it makes sense. This macro checks a descriptor to
* see if it is something that *could* represent a date value
*/
inline bool COULD_BE_DATE(const dsc desc) {
return ((DTYPE_IS_DATE(desc.dsc_dtype)) || (desc.dsc_dtype <= dtype_any_text));
}
//#define COULD_BE_DATE(d) ((DTYPE_IS_DATE((d).dsc_dtype)) || ((d).dsc_dtype <= dtype_any_text))
/* One of d1,d2 is time, the other is date */
inline bool IS_DATE_AND_TIME(const dsc d1, const dsc d2) {
return (((d1.dsc_dtype == dtype_sql_time) && (d2.dsc_dtype == dtype_sql_date)) ||
((d2.dsc_dtype == dtype_sql_time) && (d1.dsc_dtype == dtype_sql_date)));
}
//#define IS_DATE_AND_TIME(d1, d2)
// ((((d1).dsc_dtype==dtype_sql_time)&&((d2).dsc_dtype==dtype_sql_date)) ||
// (((d2).dsc_dtype==dtype_sql_time)&&((d1).dsc_dtype==dtype_sql_date)))
// size of req_rpb[0]
const size_t REQ_TAIL = sizeof (Jrd::jrd_req::blk_repeat_type);
const int MAP_LENGTH = 256;
/* RITTER - changed HP10 to HPUX */
#if defined (HPUX) && defined (SUPERSERVER)
const int MAX_RECURSION = 96;
#else
const int MAX_RECURSION = 128;
#endif
const int MAX_REQUEST_SIZE = 10485760; // 10 MB - just to be safe
using namespace Jrd;
static UCHAR* alloc_map(thread_db*, CompilerScratch*, USHORT);
static jrd_nod* catenate_nodes(thread_db*, NodeStack&);
static jrd_nod* copy(thread_db*, CompilerScratch*, jrd_nod*, UCHAR *, USHORT, jrd_nod*, bool);
static void expand_view_nodes(thread_db*, CompilerScratch*, USHORT, NodeStack&, NOD_T);
static void ignore_dbkey(thread_db*, CompilerScratch*, RecordSelExpr*, const jrd_rel*);
static jrd_nod* make_defaults(thread_db*, CompilerScratch*, USHORT, jrd_nod*);
static jrd_nod* make_validation(thread_db*, CompilerScratch*, USHORT);
static jrd_nod* pass1(thread_db*, CompilerScratch*, jrd_nod*, jrd_rel*, USHORT, bool);
static void pass1_erase(thread_db*, CompilerScratch*, jrd_nod*);
static jrd_nod* pass1_expand_view(thread_db*, CompilerScratch*, USHORT, USHORT, bool);
static void pass1_modify(thread_db*, CompilerScratch*, jrd_nod*);
static RecordSelExpr* pass1_rse(thread_db*, CompilerScratch*, RecordSelExpr*, jrd_rel*, USHORT);
static void pass1_source(thread_db*, CompilerScratch*, RecordSelExpr*, jrd_nod*, jrd_nod**, NodeStack&, jrd_rel*, USHORT);
static bool pass1_store(thread_db*, CompilerScratch*, jrd_nod*);
static jrd_nod* pass1_update(thread_db*, CompilerScratch*, jrd_rel*, const trig_vec*, USHORT, USHORT,
SecurityClass::flags_t, jrd_rel*, USHORT);
static jrd_nod* pass2(thread_db*, CompilerScratch*, jrd_nod* const, jrd_nod*);
static void pass2_rse(thread_db*, CompilerScratch*, RecordSelExpr*);
static jrd_nod* pass2_union(thread_db*, CompilerScratch*, jrd_nod*);
static jrd_nod* pass2_validation(thread_db*, CompilerScratch*, const Item&);
static void plan_check(const CompilerScratch*, const RecordSelExpr*);
static void plan_set(CompilerScratch*, RecordSelExpr*, jrd_nod*);
static void post_procedure_access(thread_db*, CompilerScratch*, jrd_prc*);
static RecordSource* post_rse(thread_db*, CompilerScratch*, RecordSelExpr*);
static void post_trigger_access(CompilerScratch*, jrd_rel*, ExternalAccess::exa_act, jrd_rel*);
static void process_map(thread_db*, CompilerScratch*, jrd_nod*, Format**);
static SSHORT strcmp_space(const char*, const char*);
static bool stream_in_rse(USHORT, const RecordSelExpr*);
static void build_external_access(thread_db* tdbb, ExternalAccessList& list, jrd_req* request);
static void verify_trigger_access(thread_db* tdbb, jrd_rel* owner_relation, trig_vec* triggers, jrd_rel* view);
#ifdef CMP_DEBUG
IMPLEMENT_TRACE_ROUTINE(cmp_trace, "CMP")
#endif
bool CMP_clone_is_active(const jrd_req* request)
{
/**************************************
*
* C M P _ c l o n e _ i s _ a c t i v e
*
**************************************
*
* Functional description
* Determine if a request or any of its clones are active.
*
**************************************/
DEV_BLKCHK(request, type_req);
if (request->req_flags & req_in_use)
return true;
vec<jrd_req*>* vector = request->req_sub_requests;
if (vector) {
for (vec<jrd_req*>::const_iterator sub_req = vector->begin(), end = vector->end();
sub_req < end; ++sub_req)
{
if (*sub_req && (*sub_req)->req_flags & req_in_use)
return true;
}
}
return false;
}
jrd_nod* CMP_clone_node(thread_db* tdbb, CompilerScratch* csb, jrd_nod* node)
{
/**************************************
*
* C M P _ c l o n e _ n o d e
*
**************************************
*
* Functional description
* Clone a value node for the optimizer. Make a copy of the node
* (if necessary) and assign impure space.
*
**************************************/
SET_TDBB(tdbb);
DEV_BLKCHK(csb, type_csb);
DEV_BLKCHK(node, type_nod);
if (node->nod_type == nod_argument) {
return node;
}
jrd_nod* clone = copy(tdbb, csb, node, NULL, 0, NULL, false);
pass2(tdbb, csb, clone, 0);
return clone;
}
inline void triggers_external_access(thread_db* tdbb, ExternalAccessList& list, trig_vec* tvec)
/**************************************
*
* t r i g g e r s _ e x t e r n a l _ a c c e s s
*
**************************************
*
* Functional description
* Invoke build_external_access for triggers in vector
*
**************************************/
{
if (tvec) {
for (size_t i = 0; i < tvec->getCount(); i++)
{
Trigger& t = (*tvec)[i];
t.compile(tdbb);
if (t.request)
{
build_external_access(tdbb, list, t.request);
}
}
}
}
static void build_external_access(thread_db* tdbb, ExternalAccessList& list, jrd_req* request)
{
/**************************************
*
* b u i l d _ e x t e r n a l _ a c c e s s
*
**************************************
*
* Functional description
* Recursively walk external dependencies (procedures, triggers) for request to assemble full
* list of requests it depends on
*
**************************************/
for (ExternalAccess *item = request->req_external.begin(); item < request->req_external.end(); item++)
{
size_t i;
if (list.find(*item, i)) continue;
list.insert(i, *item);
// Add externals recursively
if (item->exa_action == ExternalAccess::exa_procedure) {
jrd_prc* prc = MET_lookup_procedure_id(tdbb, item->exa_prc_id, false, false, 0);
if (prc && prc->prc_request)
build_external_access(tdbb, list, prc->prc_request);
}
else {
jrd_rel* relation = MET_lookup_relation_id(tdbb, item->exa_rel_id, false);
if (!relation) continue;
trig_vec *vec1, *vec2;
switch (item->exa_action) {
case ExternalAccess::exa_insert:
vec1 = relation->rel_pre_store;
vec2 = relation->rel_post_store;
break;
case ExternalAccess::exa_update:
vec1 = relation->rel_pre_modify;
vec2 = relation->rel_post_modify;
break;
case ExternalAccess::exa_delete:
vec1 = relation->rel_pre_erase;
vec2 = relation->rel_post_erase;
break;
default:
continue; // should never happen, silence the compiler
}
triggers_external_access(tdbb, list, vec1);
triggers_external_access(tdbb, list, vec2);
}
}
}
static void verify_trigger_access(thread_db* tdbb, jrd_rel* owner_relation, trig_vec* triggers, jrd_rel* view)
{
/**************************************
*
* v e r i f y _ t r i g g e r _ a c c e s s
*
**************************************
*
* Functional description
* Check that we have enough rights to access all resources this list of triggers touches
*
**************************************/
if (!triggers) {
return;
}
for (size_t i = 0; i < triggers->getCount(); i++)
{
Trigger& t = (*triggers)[i];
t.compile(tdbb);
if (!t.request)
{
continue;
}
for (const AccessItem* access = t.request->req_access.begin();
access < t.request->req_access.end(); access++)
{
// If this is not a system relation, we don't post access check if:
//
// - The table being checked is the owner of the trigger that's accessing it.
// - The field being checked is owned by the same table than the trigger
// that's accessing the field.
// - Since the trigger name comes in the triggers vector of the table and each
// trigger can be owned by only one table for now, we know for sure that
// it's a trigger defined on our target table.
if (!(owner_relation->rel_flags & REL_system))
{
if (!strcmp(access->acc_type, object_table)
&& (owner_relation->rel_name == access->acc_name))
{
continue;
}
if (!strcmp(access->acc_type, object_column)
&& (MET_lookup_field(tdbb, owner_relation, access->acc_name, &access->acc_security_name) >= 0
|| MET_relation_default_class(tdbb, owner_relation->rel_name, access->acc_security_name)))
{
continue;
}
}
// a direct access to an object from this trigger
const SecurityClass* sec_class = SCL_get_class(access->acc_security_name.c_str());
SCL_check_access(sec_class,
(access->acc_view_id) ? access->acc_view_id :
(view ? view->rel_id : 0),
t.request->req_trg_name, NULL, access->acc_mask,
access->acc_type, access->acc_name);
}
}
}
void CMP_verify_access(thread_db* tdbb, jrd_req* request)
{
/**************************************
*
* C M P _ v e r i f y _ a c c e s s
*
**************************************
*
* Functional description
* Check that we have enough rights to access all resources this request touches including
* resources it used indirectecty via procedures or triggers
*
**************************************/
ExternalAccessList external;
build_external_access(tdbb, external, request);
for (ExternalAccess* item = external.begin(); item < external.end(); item++) {
if (item->exa_action == ExternalAccess::exa_procedure) {
jrd_prc* prc = MET_lookup_procedure_id(tdbb, item->exa_prc_id, false, false, 0);
if (!prc->prc_request) continue;
for (const AccessItem* access = prc->prc_request->req_access.begin();
access < prc->prc_request->req_access.end();
access++)
{
const SecurityClass* sec_class = SCL_get_class(access->acc_security_name.c_str());
SCL_check_access(sec_class, access->acc_view_id, NULL, prc->prc_name,
access->acc_mask, access->acc_type, access->acc_name);
}
}
else {
jrd_rel* relation = MET_lookup_relation_id(tdbb, item->exa_rel_id, false);
jrd_rel* view = NULL;
if (item->exa_view_id)
view = MET_lookup_relation_id(tdbb, item->exa_view_id, false);
if (!relation) continue;
switch (item->exa_action) {
case ExternalAccess::exa_insert:
verify_trigger_access(tdbb, relation, relation->rel_pre_store, view);
verify_trigger_access(tdbb, relation, relation->rel_post_store, view);
break;
case ExternalAccess::exa_update:
verify_trigger_access(tdbb, relation, relation->rel_pre_modify, view);
verify_trigger_access(tdbb, relation, relation->rel_post_modify, view);
break;
case ExternalAccess::exa_delete:
verify_trigger_access(tdbb, relation, relation->rel_pre_erase, view);
verify_trigger_access(tdbb, relation, relation->rel_post_erase, view);
break;
default:
continue; // should never happen, silence the compiler
}
}
}
for (const AccessItem* access = request->req_access.begin(); access < request->req_access.end();
access++)
{
const SecurityClass* sec_class = SCL_get_class(access->acc_security_name.c_str());
SCL_check_access(sec_class, access->acc_view_id, NULL, NULL,
access->acc_mask, access->acc_type, access->acc_name);
}
}
jrd_req* CMP_clone_request(thread_db* tdbb, jrd_req* request, USHORT level, bool validate)
{
/**************************************
*
* C M P _ c l o n e _ r e q u e s t
*
**************************************
*
* Functional description
* Get the incarnation of the request appropriate for a given level.
* If the incarnation doesn't exist, clone the request.
*
**************************************/
DEV_BLKCHK(request, type_req);
SET_TDBB(tdbb);
Database* dbb = tdbb->getDatabase();
fb_assert(dbb);
// find the request if we've got it
if (!level) {
return request;
}
jrd_req* clone;
vec<jrd_req*>* vector = request->req_sub_requests;
if (vector && level < vector->count() && (clone = (*vector)[level]))
{
return clone;
}
if (validate) {
jrd_prc* procedure = request->req_procedure;
if (procedure) {
const TEXT* prc_sec_name =
(procedure->prc_security_name.length() > 0 ?
procedure->prc_security_name.c_str() : NULL);
const SecurityClass* sec_class = SCL_get_class(prc_sec_name);
SCL_check_access(sec_class, 0, NULL, NULL, SCL_execute,
object_procedure, procedure->prc_name);
}
CMP_verify_access(tdbb, request);
}
// we need to clone the request - find someplace to put it
vector = request->req_sub_requests =
vec<jrd_req*>::newVector(*request->req_pool, request->req_sub_requests, level + 1);
// clone the request
const USHORT n =
(USHORT) ((request->req_impure_size - REQ_SIZE + REQ_TAIL - 1) / REQ_TAIL);
clone = FB_NEW_RPT(*request->req_pool, n) jrd_req(request->req_pool);
(*vector)[level] = clone;
clone->req_attachment = tdbb->getAttachment();
clone->req_count = request->req_count;
clone->req_pool = request->req_pool;
clone->req_impure_size = request->req_impure_size;
clone->req_top_node = request->req_top_node;
clone->req_trg_name = request->req_trg_name;
clone->req_procedure = request->req_procedure;
clone->req_flags = request->req_flags & REQ_FLAGS_CLONE_MASK;
clone->req_last_xcp = request->req_last_xcp;
clone->req_id = dbb->generateId();
// We are cloning full lists here, not assigning pointers
clone->req_invariants = request->req_invariants;
clone->req_fors = request->req_fors;
clone->req_exec_sta = request->req_exec_sta;
clone->req_map_field_info.assign(request->req_map_field_info);
record_param* rpb1 = clone->req_rpb;
const record_param* const end = rpb1 + clone->req_count;
for (const record_param* rpb2 = request->req_rpb; rpb1 < end; rpb1++, rpb2++)
{
if (rpb2->rpb_stream_flags & RPB_s_update) {
rpb1->rpb_stream_flags |= RPB_s_update;
}
rpb1->rpb_relation = rpb2->rpb_relation;
}
return clone;
}
jrd_req* CMP_compile(USHORT blr_length, const UCHAR* blr, USHORT internal_flag)
{
/**************************************
*
* C M P _ c o m p i l e
*
**************************************
*
* Functional description
* Compile a BLR request.
* Wrapper for CMP_compile2 - an API change
* was made for CMP_compile, but as calls to this
* are generated by gpre it's necessary to have a
* wrapper function to keep the build from breaking.
* This function can be removed after the next full
* product build is completed.
* 1997-Jan-20 David Schnepper
*
**************************************/
return CMP_compile2(JRD_get_thread_data(), blr, internal_flag);
}
jrd_req* CMP_compile2(thread_db* tdbb, const UCHAR* blr, USHORT internal_flag,
USHORT dbginfo_length, const UCHAR* dbginfo)
{
/**************************************
*
* C M P _ c o m p i l e 2
*
**************************************
*
* Functional description
* Compile a BLR request.
*
**************************************/
jrd_req* request = 0;
SET_TDBB(tdbb);
// 26.09.2002 Nickolay Samofatov: default memory pool will become statement pool
// and will be freed by CMP_release
JrdMemoryPool* new_pool = 0;
try
{
new_pool = JrdMemoryPool::createPool();
Jrd::ContextPoolHolder context(tdbb, new_pool);
CompilerScratch* csb = PAR_parse(tdbb, blr, internal_flag, dbginfo_length, dbginfo);
request = CMP_make_request(tdbb, csb);
if (internal_flag) {
request->req_flags |= req_internal;
}
CMP_verify_access(tdbb, request);
delete csb;
}
catch (const Firebird::Exception& ex)
{
Firebird::stuff_exception(tdbb->tdbb_status_vector, ex);
if (request) {
CMP_release(tdbb, request);
}
else if (new_pool) {
JrdMemoryPool::deletePool(new_pool);
}
ERR_punt();
}
return request;
}
CompilerScratch::csb_repeat* CMP_csb_element(CompilerScratch* csb, USHORT element)
{
/**************************************
*
* C M P _ c s b _ e l e m e n t
*
**************************************
*
* Functional description
* Find tail element of compiler scratch block. If the csb isn't big
* enough, extend it.
*
**************************************/
DEV_BLKCHK(csb, type_csb);
CompilerScratch::csb_repeat empty_item;
while (element >= csb->csb_rpt.getCount()) {
csb->csb_rpt.add(empty_item);
}
return &csb->csb_rpt[element];
}
jrd_req* CMP_find_request(thread_db* tdbb, USHORT id, USHORT which)
{
/**************************************
*
* C M P _ f i n d _ r e q u e s t
*
**************************************
*
* Functional description
* Find an inactive incarnation of a system request. If necessary,
* clone it.
*
**************************************/
SET_TDBB(tdbb);
Database* dbb = tdbb->getDatabase();
CHECK_DBB(dbb);
// if the request hasn't been compiled or isn't active,
// there're nothing to do
dbb->dbb_mutexes[DBB_MUTX_cmp_clone].enter();
jrd_req* request;
if ((which == IRQ_REQUESTS && !(request = REQUEST(id))) ||
(which == DYN_REQUESTS && !(request = DYN_REQUEST(id))) ||
!(request->req_flags & (req_active | req_reserved)))
{
if (request) {
request->req_flags |= req_reserved;
}
dbb->dbb_mutexes[DBB_MUTX_cmp_clone].leave();
return request;
}
// Request exists and is in use. Look for clones until we find
// one that is available.
for (int n = 1; true; n++) {
if (n > MAX_RECURSION) {
dbb->dbb_mutexes[DBB_MUTX_cmp_clone].leave();
ERR_post(isc_no_meta_update,
isc_arg_gds, isc_req_depth_exceeded,
isc_arg_number, (SLONG) MAX_RECURSION, 0);
// Msg363 "request depth exceeded. (Recursive definition?)"
}
jrd_req* clone = CMP_clone_request(tdbb, request, n, false);
if (!(clone->req_flags & (req_active | req_reserved))) {
clone->req_flags |= req_reserved;
dbb->dbb_mutexes[DBB_MUTX_cmp_clone].leave();
return clone;
}
}
}
void CMP_fini(thread_db* tdbb)
{
/**************************************
*
* C M P _ f i n i
*
**************************************
*
* Functional description
* Get rid of resource locks during shutdown.
*
**************************************/
SET_TDBB(tdbb);
CMP_shutdown_database(tdbb);
}
Format* CMP_format(thread_db* tdbb, CompilerScratch* csb, USHORT stream)
{
/**************************************
*
* C M P _ f o r m a t
*
**************************************
*
* Functional description
* Pick up a format for a stream.
*
**************************************/
SET_TDBB(tdbb);
DEV_BLKCHK(csb, type_csb);
CompilerScratch::csb_repeat* tail = &csb->csb_rpt[stream];
if (tail->csb_format) {
return tail->csb_format;
}
if (tail->csb_relation) {
return tail->csb_format = MET_current(tdbb, tail->csb_relation);
}
else if (tail->csb_procedure) {
return tail->csb_format = tail->csb_procedure->prc_format;
}
IBERROR(222); // msg 222 bad blr - invalid stream
return NULL;
}
void CMP_get_desc(thread_db* tdbb, CompilerScratch* csb, jrd_nod* node, DSC * desc)
{
/**************************************
*
* C M P _ g e t _ d e s c
*
**************************************
*
* Functional description
* Compute descriptor for value expression.
*
**************************************/
USHORT dtype = dtype_unknown;
SET_TDBB(tdbb);
DEV_BLKCHK(csb, type_csb);
DEV_BLKCHK(node, type_nod);
switch (node->nod_type) {
case nod_max:
case nod_min:
case nod_from:
CMP_get_desc(tdbb, csb, node->nod_arg[e_stat_value], desc);
return;
case nod_agg_total:
case nod_agg_total_distinct:
case nod_total:
if (node->nod_type == nod_total)
CMP_get_desc(tdbb, csb, node->nod_arg[e_stat_value], desc);
else
CMP_get_desc(tdbb, csb, node->nod_arg[0], desc);
switch (dtype = desc->dsc_dtype) {
case dtype_short:
desc->dsc_dtype = dtype_long;
desc->dsc_length = sizeof(SLONG);
node->nod_scale = desc->dsc_scale;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
return;
case dtype_unknown:
desc->dsc_dtype = dtype_unknown;
desc->dsc_length = 0;
node->nod_scale = 0;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
return;
case dtype_long:
case dtype_int64:
case dtype_real:
case dtype_double:
#ifdef VMS
case dtype_d_float:
#endif
case dtype_text:
case dtype_cstring:
case dtype_varying:
desc->dsc_dtype = DEFAULT_DOUBLE;
desc->dsc_length = sizeof(double);
desc->dsc_scale = 0;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
node->nod_flags |= nod_double;
return;
case dtype_quad:
desc->dsc_dtype = dtype_quad;
desc->dsc_length = sizeof(SQUAD);
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
node->nod_scale = desc->dsc_scale;
node->nod_flags |= nod_quad;
#ifdef NATIVE_QUAD
return;
#endif
default:
fb_assert(false);
// FALLINTO
case dtype_sql_time:
case dtype_sql_date:
case dtype_timestamp:
case dtype_blob:
case dtype_array:
// break to error reporting code
break;
}
break;
case nod_agg_total2:
case nod_agg_total_distinct2:
CMP_get_desc(tdbb, csb, node->nod_arg[0], desc);
switch (dtype = desc->dsc_dtype) {
case dtype_short:
case dtype_long:
case dtype_int64:
desc->dsc_dtype = dtype_int64;
desc->dsc_length = sizeof(SINT64);
node->nod_scale = desc->dsc_scale;
desc->dsc_flags = 0;
return;
case dtype_unknown:
desc->dsc_dtype = dtype_unknown;
desc->dsc_length = 0;
node->nod_scale = 0;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
return;
case dtype_real:
case dtype_double:
#ifdef VMS
case dtype_d_float:
#endif
case dtype_text:
case dtype_cstring:
case dtype_varying:
desc->dsc_dtype = DEFAULT_DOUBLE;
desc->dsc_length = sizeof(double);
desc->dsc_scale = 0;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
node->nod_flags |= nod_double;
return;
case dtype_quad:
desc->dsc_dtype = dtype_quad;
desc->dsc_length = sizeof(SQUAD);
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
node->nod_scale = desc->dsc_scale;
node->nod_flags |= nod_quad;
#ifdef NATIVE_QUAD
return;
#endif
default:
fb_assert(false);
// FALLINTO
case dtype_sql_time:
case dtype_sql_date:
case dtype_timestamp:
case dtype_blob:
case dtype_array:
// break to error reporting code
break;
}
break;
case nod_prot_mask:
case nod_null:
case nod_agg_count:
case nod_agg_count2:
case nod_agg_count_distinct:
//case nod_count2:
case nod_count:
case nod_gen_id:
case nod_lock_state:
#ifdef SCROLLABLE_CURSORS
case nod_seek:
#endif
desc->dsc_dtype = dtype_long;
desc->dsc_length = sizeof(SLONG);
desc->dsc_scale = 0;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
return;
case nod_field:
{
const USHORT id = (USHORT) (IPTR) node->nod_arg[e_fld_id];
const Format* format =
CMP_format(tdbb, csb, (USHORT) (IPTR) node->nod_arg[e_fld_stream]);
if (id >= format->fmt_count) {
desc->dsc_dtype = dtype_unknown;
desc->dsc_length = 0;
desc->dsc_scale = 0;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
}
else {
*desc = format->fmt_desc[id];
}
return;
}
case nod_scalar:
{
jrd_nod* sub = node->nod_arg[e_scl_field];
jrd_rel* relation =
csb->csb_rpt[(USHORT)(IPTR) sub->
nod_arg[e_fld_stream]].csb_relation;
const USHORT id = (USHORT)(IPTR) sub->nod_arg[e_fld_id];
const jrd_fld* field = MET_get_field(relation, id);
const ArrayField* array;
if (!field || !(array = field->fld_array)) {
IBERROR(223); // msg 223 argument of scalar operation must be an array
}
*desc = array->arr_desc.iad_rpt[0].iad_desc;
if (array->arr_desc.iad_dimensions > MAX_ARRAY_DIMENSIONS)
IBERROR(306); // Found array data type with more than 16 dimensions
return;
}
case nod_divide:
{
DSC desc1, desc2;
CMP_get_desc(tdbb, csb, node->nod_arg[0], &desc1);
CMP_get_desc(tdbb, csb, node->nod_arg[1], &desc2);
// for compatibility with older versions of the product, we accept
// text types for division in blr_version4 (dialect <= 1) only
if (!(DTYPE_IS_NUMERIC(desc1.dsc_dtype) ||
DTYPE_IS_TEXT(desc1.dsc_dtype)))
{
if (desc1.dsc_dtype != dtype_unknown) {
break; // error, dtype not supported by arithmetic
}
}
if (!(DTYPE_IS_NUMERIC(desc2.dsc_dtype) ||
DTYPE_IS_TEXT(desc2.dsc_dtype)))
{
if (desc2.dsc_dtype != dtype_unknown) {
break; // error, dtype not supported by arithmetic
}
}
}
desc->dsc_dtype = DEFAULT_DOUBLE;
desc->dsc_length = sizeof(double);
desc->dsc_scale = 0;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
return;
case nod_agg_average:
case nod_agg_average_distinct:
CMP_get_desc(tdbb, csb, node->nod_arg[0], desc);
// FALL INTO
case nod_average:
if (node->nod_type == nod_average) {
CMP_get_desc(tdbb, csb, node->nod_arg[e_stat_value], desc);
}
if (!(DTYPE_IS_NUMERIC(desc->dsc_dtype) ||
DTYPE_IS_TEXT(desc->dsc_dtype)))
{
if (desc->dsc_dtype != dtype_unknown) {
break;
}
}
desc->dsc_dtype = DEFAULT_DOUBLE;
desc->dsc_length = sizeof(double);
desc->dsc_scale = 0;
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
return;
// In 6.0, the AVERAGE of an exact numeric type is int64 with the
// same scale. Only AVERAGE on an approximate numeric type can
// return a double.
case nod_agg_average2:
case nod_agg_average_distinct2:
CMP_get_desc(tdbb, csb, node->nod_arg[0], desc);
// In V6, the average of an exact type is computed in SINT64,
// rather than double as in prior releases
switch (dtype = desc->dsc_dtype) {
case dtype_short:
case dtype_long:
case dtype_int64:
desc->dsc_dtype = dtype_int64;
desc->dsc_length = sizeof(SINT64);
desc->dsc_sub_type = 0;
desc->dsc_flags = 0;
node->nod_scale = desc->dsc_scale;