[Firebird-checkins] SF.net SVN: firebird:[52061] firebird/trunk/src/dsql

[<asf...@us...>]

Revision: 52061
          http://firebird.svn.sourceforge.net/firebird/?rev=52061&view=rev
Author:   asfernandes
Date:     2010-12-19 21:42:32 +0000 (Sun, 19 Dec 2010)

Log Message:
-----------
Refactor DSQL's nod_field

Modified Paths:
--------------
    firebird/trunk/src/dsql/DdlNodes.epp
    firebird/trunk/src/dsql/ExprNodes.cpp
    firebird/trunk/src/dsql/ExprNodes.h
    firebird/trunk/src/dsql/gen.cpp
    firebird/trunk/src/dsql/make.cpp
    firebird/trunk/src/dsql/node.h
    firebird/trunk/src/dsql/pass1.cpp

Modified: firebird/trunk/src/dsql/DdlNodes.epp
===================================================================
--- firebird/trunk/src/dsql/DdlNodes.epp	2010-12-19 18:57:17 UTC (rev 52060)
+++ firebird/trunk/src/dsql/DdlNodes.epp	2010-12-19 21:42:32 UTC (rev 52061)
@@ -7392,9 +7392,10 @@
 		}
 
 		const dsql_fld* nameField = NULL;
+		const FieldNode* fieldNameNode = ExprNode::as<FieldNode>(nameNode);
 
-		if (nameNode->nod_type == Dsql::nod_field)
-			nameField = (dsql_fld*) nameNode->nod_arg[Dsql::e_fld_field];
+		if (fieldNameNode)
+			nameField = fieldNameNode->dsqlField;
 
 		const TEXT* fieldStr = NULL;
 
@@ -7411,10 +7412,12 @@
 		dsql_fld* field = NULL;
 		const dsql_ctx* context = NULL;
 
-		if (fieldNode->nod_type == Dsql::nod_field)
+		fieldNameNode = ExprNode::as<FieldNode>(fieldNode);
+
+		if (fieldNameNode)
 		{
-			field = (dsql_fld*) fieldNode->nod_arg[Dsql::e_fld_field];
-			context = (dsql_ctx*) fieldNode->nod_arg[Dsql::e_fld_context];
+			field = fieldNameNode->dsqlField;
+			context = fieldNameNode->dsqlContext;
 		}
 		else
 			updatable = false;
@@ -8064,8 +8067,8 @@
 				if (replaceFields)
 					replaceName = (dsql_str*) (*replace)->nod_arg[Dsql::e_fln_name];
 
-				const dsql_nod* fieldNode = *search;
-				const dsql_fld* field = (dsql_fld*) fieldNode->nod_arg[Dsql::e_fld_field];
+				const FieldNode* fieldNode = ExprNode::as<FieldNode>(*search);
+				const dsql_fld* field = fieldNode->dsqlField;
 
 				if (field->fld_name == fieldName->str_data)
 				{

Modified: firebird/trunk/src/dsql/ExprNodes.cpp
===================================================================
--- firebird/trunk/src/dsql/ExprNodes.cpp	2010-12-19 18:57:17 UTC (rev 52060)
+++ firebird/trunk/src/dsql/ExprNodes.cpp	2010-12-19 21:42:32 UTC (rev 52061)
@@ -4202,12 +4202,16 @@
 
 FieldNode::FieldNode(MemoryPool& pool)
 	: TypedNode<ValueExprNode, ExprNode::TYPE_FIELD>(pool),
+	  dsqlContext(NULL),
+	  dsqlField(NULL),
+	  dsqlIndices(NULL),
 	  byId(false),
 	  fieldStream(0),
 	  fieldId(0),
 	  format(NULL),
 	  defaultValue(NULL)
 {
+	dsqlDesc.clear();
 }
 
 // Parse a field.
@@ -4383,40 +4387,191 @@
 	ExprNode::print(text, nodes);
 }
 
-//// TODO: Implement FieldNode DSQL support.
-
 ValueExprNode* FieldNode::dsqlPass(DsqlCompilerScratch* dsqlScratch)
 {
-	fb_assert(false);
-	return NULL;
+	// AB: nod_field is an already passed node.
+	// This could be done in expand_select_list.
+	return this;
 }
 
+bool FieldNode::dsqlAggregateFinder(AggregateFinder& visitor)
+{
+	if (visitor.deepestLevel < dsqlContext->ctx_scope_level)
+		visitor.deepestLevel = dsqlContext->ctx_scope_level;
+
+	return false;
+}
+
+bool FieldNode::dsqlAggregate2Finder(Aggregate2Finder& visitor)
+{
+	return false;
+}
+
+bool FieldNode::dsqlInvalidReferenceFinder(InvalidReferenceFinder& visitor)
+{
+	// Wouldn't it be better to call an error from this point where return is true?
+	// Then we could give the fieldname that's making the trouble.
+
+	// If we come here then this field is used inside a aggregate-function. The
+	// ctx_scope_level gives the info how deep the context is inside the statement.
+
+	// If the context-scope-level from this field is lower or the same as the scope-level
+	// from the given context then it is an invalid field.
+	if (dsqlContext->ctx_scope_level == visitor.context->ctx_scope_level)
+	{
+		// Return true (invalid) if this field isn't inside the GROUP BY clause, that
+		// should already been seen in the match_node test in that routine start.
+		return true;
+	}
+
+	return false;
+}
+
+bool FieldNode::dsqlSubSelectFinder(SubSelectFinder& visitor)
+{
+	return false;
+}
+
+bool FieldNode::dsqlFieldFinder(FieldFinder& visitor)
+{
+	visitor.field = true;
+
+	switch (visitor.matchType)
+	{
+		case FIELD_MATCH_TYPE_EQUAL:
+			return dsqlContext->ctx_scope_level == visitor.checkScopeLevel;
+
+		case FIELD_MATCH_TYPE_LOWER:
+			return dsqlContext->ctx_scope_level < visitor.checkScopeLevel;
+
+		case FIELD_MATCH_TYPE_LOWER_EQUAL:
+			return dsqlContext->ctx_scope_level <= visitor.checkScopeLevel;
+
+		///case FIELD_MATCH_TYPE_HIGHER:
+		///	return dsqlContext->ctx_scope_level > visitor.checkScopeLevel;
+
+		///case FIELD_MATCH_TYPE_HIGHER_EQUAL:
+		///	return dsqlContext->ctx_scope_level >= visitor.checkScopeLevel;
+
+		default:
+			fb_assert(false);
+	}
+
+	return false;
+}
+
+bool FieldNode::dsqlFieldRemapper(FieldRemapper& visitor)
+{
+	if (dsqlContext->ctx_scope_level == visitor.context->ctx_scope_level)
+	{
+		visitor.replaceNode(PASS1_post_map(visitor.dsqlScratch, this, visitor.context,
+			visitor.partitionNode, visitor.orderNode));
+	}
+
+	return false;
+}
+
 void FieldNode::setParameterName(dsql_par* parameter) const
 {
-	fb_assert(false);
+	parameter->par_name = parameter->par_alias = dsqlField->fld_name.c_str();
+
+	if (dsqlContext->ctx_relation)
+	{
+		parameter->par_rel_name = dsqlContext->ctx_relation->rel_name.c_str();
+		parameter->par_owner_name = dsqlContext->ctx_relation->rel_owner.c_str();
+	}
+	else if (dsqlContext->ctx_procedure)
+	{
+		parameter->par_rel_name = dsqlContext->ctx_procedure->prc_name.identifier.c_str();
+		parameter->par_owner_name = dsqlContext->ctx_procedure->prc_owner.c_str();
+	}
+
+	parameter->par_rel_alias = dsqlContext->ctx_alias;
 }
 
+// Generate blr for a field - field id's are preferred but not for trigger or view blr.
 void FieldNode::genBlr(DsqlCompilerScratch* dsqlScratch)
 {
-	fb_assert(false);
+	// For older clients - generate an error should they try and
+	// access data types which did not exist in the older dialect.
+	if (dsqlScratch->clientDialect <= SQL_DIALECT_V5)
+	{
+		switch (dsqlField->fld_dtype)
+		{
+			case dtype_sql_date:
+			case dtype_sql_time:
+			case dtype_int64:
+				ERRD_post(Arg::Gds(isc_sqlerr) << Arg::Num(-804) <<
+						  Arg::Gds(isc_dsql_datatype_err) <<
+						  Arg::Gds(isc_sql_dialect_datatype_unsupport) <<
+								Arg::Num(dsqlScratch->clientDialect) <<
+								Arg::Str(DSC_dtype_tostring(static_cast<UCHAR>(dsqlField->fld_dtype))));
+				break;
+
+			default:
+				// No special action for other data types
+				break;
+		}
+	}
+
+	if (dsqlIndices)
+		dsqlScratch->appendUChar(blr_index);
+
+	if (DDL_ids(dsqlScratch))
+	{
+		dsqlScratch->appendUChar(blr_fid);
+		GEN_stuff_context(dsqlScratch, dsqlContext);
+		dsqlScratch->appendUShort(dsqlField->fld_id);
+	}
+	else
+	{
+		dsqlScratch->appendUChar(blr_field);
+		GEN_stuff_context(dsqlScratch, dsqlContext);
+		dsqlScratch->appendMetaString(dsqlField->fld_name.c_str());
+	}
+
+	if (dsqlIndices)
+	{
+		dsqlScratch->appendUChar(dsqlIndices->nod_count);
+		dsql_nod** ptr = dsqlIndices->nod_arg;
+
+		for (const dsql_nod* const* end = ptr + dsqlIndices->nod_count; ptr != end; ++ptr)
+			GEN_expr(dsqlScratch, *ptr);
+	}
 }
 
 void FieldNode::make(DsqlCompilerScratch* /*dsqlScratch*/, dsc* desc)
 {
-	fb_assert(false);
+	if (dsqlDesc.dsc_dtype)
+		*desc = dsqlDesc;
+	else
+	{
+		ERRD_post(Arg::Gds(isc_sqlerr) << Arg::Num(-203) <<
+				  Arg::Gds(isc_dsql_field_ref));
+	}
 }
 
 bool FieldNode::dsqlMatch(const ExprNode* other, bool ignoreMapCast) const
 {
-	fb_assert(false);
-	return false;
+	if (!ExprNode::dsqlMatch(other, ignoreMapCast))
+		return false;
+
+	const FieldNode* o = other->as<FieldNode>();
+	fb_assert(o)
+
+	if (dsqlField != o->dsqlField || dsqlContext != o->dsqlContext)
+		return false;
+
+	if (dsqlIndices || o->dsqlIndices)
+		return PASS1_node_match(dsqlIndices, o->dsqlIndices, ignoreMapCast);
+
+	return true;
 }
 
 bool FieldNode::expressionEqual(thread_db* tdbb, CompilerScratch* csb, /*const*/ ExprNode* other,
 	USHORT stream) /*const*/
 {
 	const FieldNode* o = other->as<FieldNode>();
-	// ASF: Why not test fieldStream == o->fieldStream?
 	return o && fieldId == o->fieldId && o->fieldStream == stream;
 }
 
@@ -5626,30 +5781,17 @@
 	}
 
 	const char* nameAlias = NULL;
-	const dsql_ctx* context = NULL;
-	const dsql_fld* field;
+	const FieldNode* fieldNode = NULL;
 	const dsql_nod* alias;
 	const dsql_str* str;
 
 	switch (nestNode->nod_type)
 	{
-		case Dsql::nod_field:
-			field = (dsql_fld*) nestNode->nod_arg[Dsql::e_fld_field];
-			nameAlias = field->fld_name.c_str();
-			context = (dsql_ctx*) nestNode->nod_arg[Dsql::e_fld_context];
-			break;
-
 		case Dsql::nod_alias:
 			str = (dsql_str*) nestNode->nod_arg[Dsql::e_alias_alias];
 			parameter->par_alias = str->str_data;
 			alias = nestNode->nod_arg[Dsql::e_alias_value];
-
-			if (alias->nod_type == Dsql::nod_field)
-			{
-				field = (dsql_fld*) alias->nod_arg[Dsql::e_fld_field];
-				parameter->par_name = field->fld_name.c_str();
-				context = (dsql_ctx*) alias->nod_arg[Dsql::e_fld_context];
-			}
+			fieldNode = ExprNode::as<FieldNode>(alias);
 			break;
 
 		case Dsql::nod_class_exprnode:
@@ -5668,19 +5810,25 @@
 			{
 				parameter->par_alias = derivedField->name;
 				alias = derivedField->dsqlValue;
-
-				if (alias->nod_type == Dsql::nod_field)
-				{
-					field = (dsql_fld*) alias->nod_arg[Dsql::e_fld_field];
-					parameter->par_name = field->fld_name.c_str();
-					context = (dsql_ctx*) alias->nod_arg[Dsql::e_fld_context];
-				}
+				fieldNode = ExprNode::as<FieldNode>(alias);
 			}
+			else if ((fieldNode = ExprNode::as<FieldNode>(nestNode)))
+				nameAlias = fieldNode->dsqlField->fld_name.c_str();
 
 			break;
 		}
 	} // switch(nestNode->nod_type)
 
+	const dsql_ctx* context = NULL;
+	const dsql_fld* field;
+
+	if (fieldNode)
+	{
+		context = fieldNode->dsqlContext;
+		field = fieldNode->dsqlField;
+		parameter->par_name = field->fld_name.c_str();
+	}
+
 	if (nameAlias)
 		parameter->par_name = parameter->par_alias = nameAlias;
 
@@ -5836,13 +5984,13 @@
 void DerivedFieldNode::setParameterName(dsql_par* parameter) const
 {
 	const dsql_ctx* context = NULL;
+	const FieldNode* fieldNode;
 	const RecordKeyNode* dbKeyNode;
 
-	if (dsqlValue->nod_type == Dsql::nod_field)
+	if ((fieldNode = ExprNode::as<FieldNode>(dsqlValue)))
 	{
-		dsql_fld* field = (dsql_fld*) dsqlValue->nod_arg[Dsql::e_fld_field];
-		parameter->par_name = field->fld_name.c_str();
-		context = (dsql_ctx*) dsqlValue->nod_arg[Dsql::e_fld_context];
+		parameter->par_name = fieldNode->dsqlField->fld_name.c_str();
+		context = fieldNode->dsqlContext;
 	}
 	else if ((dbKeyNode = ExprNode::as<RecordKeyNode>(dsqlValue)))
 		dbKeyNode->setParameterName(parameter);
@@ -5872,7 +6020,7 @@
 	// a set (ORed) of contexts. If any of them are in a valid position the expression is
 	// evaluated, otherwise a NULL will be returned. This is fix for CORE-1246.
 
-	if (dsqlValue->nod_type != Dsql::nod_field &&
+	if (!ExprNode::is<FieldNode>(dsqlValue) &&
 		!ExprNode::is<DerivedFieldNode>(dsqlValue) &&
 		!ExprNode::is<RecordKeyNode>(dsqlValue) &&
 		!ExprNode::is<DsqlMapNode>(dsqlValue))

Modified: firebird/trunk/src/dsql/ExprNodes.h
===================================================================
--- firebird/trunk/src/dsql/ExprNodes.h	2010-12-19 18:57:17 UTC (rev 52060)
+++ firebird/trunk/src/dsql/ExprNodes.h	2010-12-19 21:42:32 UTC (rev 52061)
@@ -437,6 +437,14 @@
 
 	virtual void print(Firebird::string& text, Firebird::Array<dsql_nod*>& nodes) const;
 	virtual ValueExprNode* dsqlPass(DsqlCompilerScratch* dsqlScratch);
+
+	virtual bool dsqlAggregateFinder(AggregateFinder& visitor);
+	virtual bool dsqlAggregate2Finder(Aggregate2Finder& visitor);
+	virtual bool dsqlInvalidReferenceFinder(InvalidReferenceFinder& visitor);
+	virtual bool dsqlSubSelectFinder(SubSelectFinder& visitor);
+	virtual bool dsqlFieldFinder(FieldFinder& visitor);
+	virtual bool dsqlFieldRemapper(FieldRemapper& visitor);
+
 	virtual void setParameterName(dsql_par* parameter) const;
 	virtual void genBlr(DsqlCompilerScratch* dsqlScratch);
 	virtual void make(DsqlCompilerScratch* dsqlScratch, dsc* desc);
@@ -478,6 +486,10 @@
 	virtual dsc* execute(thread_db* tdbb, jrd_req* request) const;
 
 public:
+	dsql_ctx* dsqlContext;
+	dsql_fld* dsqlField;
+	dsql_nod* dsqlIndices;
+	dsc dsqlDesc;
 	bool byId;
 	USHORT fieldStream;
 	USHORT fieldId;

Modified: firebird/trunk/src/dsql/gen.cpp
===================================================================
--- firebird/trunk/src/dsql/gen.cpp	2010-12-19 18:57:17 UTC (rev 52060)
+++ firebird/trunk/src/dsql/gen.cpp	2010-12-19 21:42:32 UTC (rev 52061)
@@ -67,7 +67,6 @@
 static void gen_coalesce(DsqlCompilerScratch*, const dsql_nod*);
 static void gen_error_condition(DsqlCompilerScratch*, const dsql_nod*);
 static void gen_exec_stmt(DsqlCompilerScratch* dsqlScratch, const dsql_nod* node);
-static void gen_field(DsqlCompilerScratch*, const dsql_ctx*, const dsql_fld*, dsql_nod*);
 static void gen_join_rse(DsqlCompilerScratch*, const dsql_nod*);
 static void gen_map(DsqlCompilerScratch*, dsql_map*);
 static inline void gen_optional_expr(DsqlCompilerScratch*, const UCHAR code, dsql_nod*);
@@ -182,13 +181,6 @@
 		dsqlScratch->appendUShort(0);		// Field id
 		return;
 
-	case nod_field:
-		gen_field(dsqlScratch,
-				  (dsql_ctx*) node->nod_arg[e_fld_context],
-				  (dsql_fld*) node->nod_arg[e_fld_field],
-				  node->nod_arg[e_fld_indices]);
-		return;
-
 	case nod_join:
 		gen_join_rse(dsqlScratch, node);
 		return;
@@ -1244,72 +1236,6 @@
 
 /**
 
- 	gen_field
-
-    @brief	Generate blr for a field - field id's
- 	are preferred but not for trigger or view blr.
-
-
-    @param dsqlScratch
-    @param context
-    @param field
-    @param indices
-
- **/
-static void gen_field( DsqlCompilerScratch* dsqlScratch, const dsql_ctx* context,
-	const dsql_fld* field, dsql_nod* indices)
-{
-	// For older clients - generate an error should they try and
-	// access data types which did not exist in the older dialect
-	if (dsqlScratch->clientDialect <= SQL_DIALECT_V5)
-	{
-		switch (field->fld_dtype)
-		{
-		case dtype_sql_date:
-		case dtype_sql_time:
-		case dtype_int64:
-			ERRD_post(Arg::Gds(isc_sqlerr) << Arg::Num(-804) <<
-					  Arg::Gds(isc_dsql_datatype_err) <<
-					  Arg::Gds(isc_sql_dialect_datatype_unsupport) <<
-					  			Arg::Num(dsqlScratch->clientDialect) <<
-					  			Arg::Str(DSC_dtype_tostring(static_cast<UCHAR>(field->fld_dtype))));
-			break;
-		default:
-			// No special action for other data types
-			break;
-		}
-	}
-
-	if (indices)
-		dsqlScratch->appendUChar(blr_index);
-
-	if (DDL_ids(dsqlScratch))
-	{
-		dsqlScratch->appendUChar(blr_fid);
-		GEN_stuff_context(dsqlScratch, context);
-		dsqlScratch->appendUShort(field->fld_id);
-	}
-	else
-	{
-		dsqlScratch->appendUChar(blr_field);
-		GEN_stuff_context(dsqlScratch, context);
-		dsqlScratch->appendMetaString(field->fld_name.c_str());
-	}
-
-	if (indices)
-	{
-		dsqlScratch->appendUChar(indices->nod_count);
-		dsql_nod** ptr = indices->nod_arg;
-		for (const dsql_nod* const* end = ptr + indices->nod_count; ptr < end; ptr++)
-		{
-			GEN_expr(dsqlScratch, *ptr);
-		}
-	}
-}
-
-
-/**
-
  	gen_join_rse
 
     @brief	Generate a record selection expression

Modified: firebird/trunk/src/dsql/make.cpp
===================================================================
--- firebird/trunk/src/dsql/make.cpp	2010-12-19 18:57:17 UTC (rev 52060)
+++ firebird/trunk/src/dsql/make.cpp	2010-12-19 21:42:32 UTC (rev 52061)
@@ -422,18 +422,6 @@
 		desc->dsc_flags = 0; // Can first/skip accept NULL in the future?
 		return;
 
-	case nod_field:
-		if (node->nod_desc.dsc_dtype)
-		{
-			*desc = node->nod_desc;
-		}
-		else
-		{
-			ERRD_post(Arg::Gds(isc_sqlerr) << Arg::Num(-203) <<
-					  Arg::Gds(isc_dsql_field_ref));
-		}
-		return;
-
 	case nod_hidden_var:
 		MAKE_desc(dsqlScratch, desc, node->nod_arg[e_hidden_var_expr]);
 		return;
@@ -541,28 +529,29 @@
 	DEV_BLKCHK(field, dsql_type_fld);
 	DEV_BLKCHK(indices, dsql_type_nod);
 
-	dsql_nod* node = MAKE_node(nod_field, e_fld_count);
-	node->nod_arg[e_fld_context] = (dsql_nod*) context;
-	node->nod_arg[e_fld_field] = (dsql_nod*) field;
+	thread_db* tdbb = JRD_get_thread_data();
+	FieldNode* node = FB_NEW(*tdbb->getDefaultPool()) FieldNode(*tdbb->getDefaultPool());
+	node->dsqlContext = context;
+	node->dsqlField = field;
+
 	if (field->fld_dimensions)
 	{
 		if (indices)
 		{
-			node->nod_arg[e_fld_indices] = indices;
-			MAKE_desc_from_field(&node->nod_desc, field);
-			node->nod_desc.dsc_dtype = static_cast<UCHAR>(field->fld_element_dtype);
-			node->nod_desc.dsc_length = field->fld_element_length;
+			node->dsqlIndices = indices;
+			MAKE_desc_from_field(&node->dsqlDesc, field);
+			node->dsqlDesc.dsc_dtype = static_cast<UCHAR>(field->fld_element_dtype);
+			node->dsqlDesc.dsc_length = field->fld_element_length;
 
-			// node->nod_desc.dsc_scale = field->fld_scale;
-			// node->nod_desc.dsc_sub_type = field->fld_sub_type;
-
+			// node->dsqlDesc.dsc_scale = field->fld_scale;
+			// node->dsqlDesc.dsc_sub_type = field->fld_sub_type;
 		}
 		else
 		{
-			node->nod_desc.dsc_dtype = dtype_array;
-			node->nod_desc.dsc_length = sizeof(ISC_QUAD);
-			node->nod_desc.dsc_scale = static_cast<SCHAR>(field->fld_scale);
-			node->nod_desc.dsc_sub_type = field->fld_sub_type;
+			node->dsqlDesc.dsc_dtype = dtype_array;
+			node->dsqlDesc.dsc_length = sizeof(ISC_QUAD);
+			node->dsqlDesc.dsc_scale = static_cast<SCHAR>(field->fld_scale);
+			node->dsqlDesc.dsc_sub_type = field->fld_sub_type;
 		}
 	}
 	else
@@ -573,32 +562,33 @@
 					  Arg::Gds(isc_dsql_only_can_subscript_array) << Arg::Str(field->fld_name));
 		}
 
-		MAKE_desc_from_field(&node->nod_desc, field);
+		MAKE_desc_from_field(&node->dsqlDesc, field);
 	}
 
 	if ((field->fld_flags & FLD_nullable) || (context->ctx_flags & CTX_outer_join))
-	{
-		node->nod_desc.dsc_flags |= DSC_nullable;
-	}
+		node->dsqlDesc.dsc_flags |= DSC_nullable;
 
 	// UNICODE_FSS_HACK
 	// check if the field is a system domain and the type is CHAR/VARCHAR CHARACTER SET UNICODE_FSS
-	if ((field->fld_flags & FLD_system) && node->nod_desc.dsc_dtype <= dtype_varying &&
-		INTL_GET_CHARSET(&node->nod_desc) == CS_METADATA)
+	if ((field->fld_flags & FLD_system) && node->dsqlDesc.dsc_dtype <= dtype_varying &&
+		INTL_GET_CHARSET(&node->dsqlDesc) == CS_METADATA)
 	{
 		USHORT adjust = 0;
 
-		if (node->nod_desc.dsc_dtype == dtype_varying)
+		if (node->dsqlDesc.dsc_dtype == dtype_varying)
 			adjust = sizeof(USHORT);
-		else if (node->nod_desc.dsc_dtype == dtype_cstring)
+		else if (node->dsqlDesc.dsc_dtype == dtype_cstring)
 			adjust = 1;
 
-		node->nod_desc.dsc_length -= adjust;
-		node->nod_desc.dsc_length *= 3;
-		node->nod_desc.dsc_length += adjust;
+		node->dsqlDesc.dsc_length -= adjust;
+		node->dsqlDesc.dsc_length *= 3;
+		node->dsqlDesc.dsc_length += adjust;
 	}
 
-	return node;
+	dsql_nod* nod = MAKE_node(nod_class_exprnode, 1);
+	nod->nod_arg[0] = reinterpret_cast<dsql_nod*>(node);
+
+	return nod;
 }
 
 
@@ -876,7 +866,7 @@
 	fb_assert(parameter && item);
 
 	const char* name_alias = NULL;
-	const RecordKeyNode* dbKeyNode;
+	const ValueExprNode* exprNode;
 
 	switch (item->nod_type)
 	{
@@ -887,23 +877,15 @@
 				exprNode->setParameterName(parameter);
 		}
 		break;
-	case nod_field:
-		field = (dsql_fld*) item->nod_arg[e_fld_field];
-		name_alias = field->fld_name.c_str();
-		context = (dsql_ctx*) item->nod_arg[e_fld_context];
-		break;
 	case nod_alias:
 		string = (dsql_str*) item->nod_arg[e_alias_alias];
 		alias = item->nod_arg[e_alias_value];
 
-		if (alias->nod_type == nod_field)
+		if ((exprNode = ExprNode::as<RecordKeyNode>(alias)) ||
+			(exprNode = ExprNode::as<FieldNode>(alias)))
 		{
-			field = (dsql_fld*) alias->nod_arg[e_fld_field];
-			parameter->par_name = field->fld_name.c_str();
-			context = (dsql_ctx*) alias->nod_arg[e_fld_context];
+			exprNode->setParameterName(parameter);
 		}
-		else if ((dbKeyNode = ExprNode::as<RecordKeyNode>(alias)))
-			dbKeyNode->setParameterName(parameter);
 
 		parameter->par_alias = string->str_data;
 		break;
@@ -912,6 +894,7 @@
 	case nod_simple_case:
 		name_alias = "CASE";
 		break;
+
 	case nod_coalesce:
 		name_alias = "COALESCE";
 		break;
@@ -919,20 +902,4 @@
 
 	if (name_alias)
 		parameter->par_name = parameter->par_alias = name_alias;
-
-	if (context)
-	{
-		if (context->ctx_relation)
-		{
-			parameter->par_rel_name = context->ctx_relation->rel_name.c_str();
-			parameter->par_owner_name = context->ctx_relation->rel_owner.c_str();
-		}
-		else if (context->ctx_procedure)
-		{
-			parameter->par_rel_name = context->ctx_procedure->prc_name.identifier.c_str();
-			parameter->par_owner_name = context->ctx_procedure->prc_owner.c_str();
-		}
-
-		parameter->par_rel_alias = context->ctx_alias;
-	}
 }

Modified: firebird/trunk/src/dsql/node.h
===================================================================
--- firebird/trunk/src/dsql/node.h	2010-12-19 18:57:17 UTC (rev 52060)
+++ firebird/trunk/src/dsql/node.h	2010-12-19 21:42:32 UTC (rev 52061)
@@ -122,7 +122,6 @@
 	nod_flag,
 	nod_join,
 	nod_unique,
-	nod_field,
 	nod_dom_value,
 	nod_field_name,
 	nod_alias,
@@ -255,11 +254,6 @@
 	e_fpd_list = 0,			// nod_for_update
 	e_fpd_count,
 
-	e_fld_context = 0,		// nod_field
-	e_fld_field,
-	e_fld_indices,
-	e_fld_count,
-
 	e_ary_array = 0,		// nod_array
 	e_ary_indices,
 	e_ary_count,

Modified: firebird/trunk/src/dsql/pass1.cpp
===================================================================
--- firebird/trunk/src/dsql/pass1.cpp	2010-12-19 18:57:17 UTC (rev 52060)
+++ firebird/trunk/src/dsql/pass1.cpp	2010-12-19 21:42:32 UTC (rev 52061)
@@ -391,14 +391,6 @@
 			return aggregate;
 		}
 
-		case nod_field:
-		{
-			const dsql_ctx* localContext = reinterpret_cast<dsql_ctx*>(node->nod_arg[e_fld_context]);
-			if (deepestLevel < localContext->ctx_scope_level)
-				deepestLevel = localContext->ctx_scope_level;
-			return false;
-		}
-
 		default:
 			return visitChildren(node);
 	}
@@ -452,7 +444,6 @@
 		}
 
 		case nod_relation:
-		case nod_field:
 			return false;
 
 		default:
@@ -513,36 +504,6 @@
 		case nod_relation:
 			return false;
 
-		case nod_field:
-		{
-			const dsql_ctx* field_context = (dsql_ctx*) node->nod_arg[e_fld_context];
-			DEV_BLKCHK(field_context, dsql_type_ctx);
-
-			field = true;
-
-			switch (matchType)
-			{
-				case FIELD_MATCH_TYPE_EQUAL:
-					return field_context->ctx_scope_level == checkScopeLevel;
-
-				case FIELD_MATCH_TYPE_LOWER:
-					return field_context->ctx_scope_level < checkScopeLevel;
-
-				case FIELD_MATCH_TYPE_LOWER_EQUAL:
-					return field_context->ctx_scope_level <= checkScopeLevel;
-
-				///case FIELD_MATCH_TYPE_HIGHER:
-				///	return field_context->ctx_scope_level > checkScopeLevel;
-
-				///case FIELD_MATCH_TYPE_HIGHER_EQUAL:
-				///	return field_context->ctx_scope_level >= checkScopeLevel;
-
-				default:
-					fb_assert(false);
-			}
-			break;
-		}
-
 		default:
 			return visitChildren(node);
 	}
@@ -596,28 +557,6 @@
 			invalid |= visit(&node->nod_arg[e_agg_rse]);
 			break;
 
-		case nod_field:
-		{
-			const dsql_ctx* localContext = reinterpret_cast<dsql_ctx*>(node->nod_arg[e_fld_context]);
-
-			// Wouldn't it be better to call an error from this point where return is true?
-			// Then we could give the fieldname that's making the trouble.
-
-			// If we come here then this field is used inside a aggregate-function. The
-			// ctx_scope_level gives the info how deep the context is inside the statement.
-
-			// If the context-scope-level from this field is lower or the same as the scope-level
-			// from the given context then it is an invalid field.
-			if (localContext->ctx_scope_level == context->ctx_scope_level)
-			{
-				// Return true (invalid) if this field isn't inside the GROUP BY clause, that
-				// should already been seen in the match_node test in that routine start.
-				invalid = true;
-			}
-
-			break;
-		}
-
 		case nod_coalesce:
 		///case nod_unique:
 		case nod_rse:
@@ -674,15 +613,6 @@
 
 	switch (node->nod_type)
 	{
-		case nod_field:
-		{
-			const dsql_ctx* localContext = reinterpret_cast<dsql_ctx*>(node->nod_arg[e_fld_context]);
-			if (localContext->ctx_scope_level == context->ctx_scope_level)
-				replaceNode(PASS1_post_map(dsqlScratch, node, context, partitionNode, orderNode));
-
-			break;
-		}
-
 		case nod_rse:
 		{
 			AutoSetRestore<USHORT> autoCurrentLevel(&currentLevel, currentLevel + 1);
@@ -756,7 +686,6 @@
 
 		case nod_aggregate:
 
-		case nod_field:
 		case nod_relation:
 		case nod_field_name:
 			return false;
@@ -1116,11 +1045,6 @@
 			return pass1_variable(dsqlScratch, input);
 		return pass1_field(dsqlScratch, input, false, NULL);
 
-	case nod_field:
-		// AB: nod_field is an already passed node.
-		// This could be done in expand_select_list.
-		return input;
-
 	case nod_array:
 		if (dsqlScratch->isPsql())
 		{
@@ -2212,10 +2136,11 @@
 		if (elem1->nod_type == nod_assign && !is_insert)
 			elem1 = elem1->nod_arg[e_asgn_field];
 
-		if (elem1->nod_type == nod_field)
+		const FieldNode* fieldNode1 = ExprNode::as<FieldNode>(elem1);
+
+		if (fieldNode1)
 		{
-			const Firebird::MetaName& n1 =
-				reinterpret_cast<dsql_fld*>(elem1->nod_arg[e_fld_field])->fld_name;
+			const Firebird::MetaName& n1 = fieldNode1->dsqlField->fld_name;
 
 			for (int j = i + 1; j < fields->nod_count; ++j)
 			{
@@ -2223,19 +2148,20 @@
 				if (elem2->nod_type == nod_assign && !is_insert)
 					elem2 = elem2->nod_arg[e_asgn_field];
 
-				if (elem2->nod_type == nod_field)
+				const FieldNode* fieldNode2 = ExprNode::as<FieldNode>(elem2);
+
+				if (fieldNode2)
 				{
-					const Firebird::MetaName& n2 =
-						reinterpret_cast<dsql_fld*>(elem2->nod_arg[e_fld_field])->fld_name;
+					const Firebird::MetaName& n2 = fieldNode2->dsqlField->fld_name;
 
 					if (n1 == n2)
 					{
-						const dsql_ctx* tmp_ctx = (dsql_ctx*) elem2->nod_arg[e_fld_context];
+						const dsql_ctx* tmp_ctx = fieldNode2->dsqlContext;
 						const dsql_rel* bad_rel = tmp_ctx ? tmp_ctx->ctx_relation : 0;
-						field_duplication(bad_rel ? bad_rel->rel_name.c_str() : 0,
-										n2.c_str(),
-										is_insert ? old_fields->nod_arg[j]: old_fields->nod_arg[j]->nod_arg[1],
-										dsqlScratch);
+						field_duplication((bad_rel ? bad_rel->rel_name.c_str() : 0),
+							n2.c_str(),
+							(is_insert ? old_fields->nod_arg[j] : old_fields->nod_arg[j]->nod_arg[1]),
+							dsqlScratch);
 					}
 				}
 			}
@@ -2585,19 +2511,6 @@
 		}
 		return true;
 
-	case nod_field:
-		if (node1->nod_arg[e_fld_field] != node2->nod_arg[e_fld_field] ||
-			node1->nod_arg[e_fld_context] != node2->nod_arg[e_fld_context])
-		{
-			return false;
-		}
-		if (node1->nod_arg[e_fld_indices] || node2->nod_arg[e_fld_indices])
-		{
-			return PASS1_node_match(node1->nod_arg[e_fld_indices],
-				node2->nod_arg[e_fld_indices], ignore_map_cast);
-		}
-		return true;
-
 	case nod_derived_table:
 		{
 			const dsql_ctx* ctx1 = (dsql_ctx*) node1->nod_arg[e_derived_table_context];
@@ -2735,8 +2648,10 @@
 	thread_db* tdbb = JRD_get_thread_data();
 
 	PASS1_make_context(dsqlScratch, input->nod_arg[e_blb_relation]);
-	dsql_nod* field = pass1_field(dsqlScratch, input->nod_arg[e_blb_field], false, NULL);
-	if (field->nod_desc.dsc_dtype != dtype_blob)
+	FieldNode* field = ExprNode::as<FieldNode>(
+		pass1_field(dsqlScratch, input->nod_arg[e_blb_field], false, NULL));
+
+	if (field->dsqlDesc.dsc_dtype != dtype_blob)
 	{
 		ERRD_post(Arg::Gds(isc_sqlerr) << Arg::Num(-206) <<
 				  Arg::Gds(isc_dsql_blob_err));
@@ -2758,8 +2673,8 @@
 	blob->blb_segment = parameter;
 	parameter->par_desc.dsc_dtype = dtype_text;
 	parameter->par_desc.dsc_ttype() = ttype_binary;
-	parameter->par_desc.dsc_length = ((dsql_fld*) field->nod_arg[e_fld_field])->fld_seg_length;
-	DEV_BLKCHK(field->nod_arg[e_fld_field], dsql_type_fld);
+	parameter->par_desc.dsc_length = field->dsqlField->fld_seg_length;
+	DEV_BLKCHK(field->dsqlField, dsql_type_fld);
 
 	// The Null indicator is used to pass back the segment length,
 	// set DSC_nullable so that the SQL_type is set to SQL_TEXT+1 instead
@@ -2773,7 +2688,7 @@
 	dsql_msg* temp_msg = (input->nod_type == nod_get_segment) ?
 		blob->blb_open_in_msg : blob->blb_open_out_msg;
 	blob->blb_blob_id = parameter = MAKE_parameter(temp_msg, true, true, 0, NULL);
-	MAKE_desc(dsqlScratch, &parameter->par_desc, field);
+	field->make(dsqlScratch, &parameter->par_desc);
 	parameter->par_desc.dsc_dtype = dtype_quad;
 	parameter->par_desc.dsc_scale = 0;
 
@@ -4243,28 +4158,24 @@
 static dsql_nod* pass1_hidden_variable(DsqlCompilerScratch* dsqlScratch, dsql_nod*& expr)
 {
 	// For some node types, it's better to not create temporary value.
-	switch (expr->nod_type)
+	if (expr->nod_type == nod_class_exprnode)
 	{
-		case nod_field:
-			return NULL;
-
-		case nod_class_exprnode:
-			switch (ExprNode::fromLegacy(expr)->type)
-			{
-				case ExprNode::TYPE_CURRENT_DATE:
-				case ExprNode::TYPE_CURRENT_TIME:
-				case ExprNode::TYPE_CURRENT_TIMESTAMP:
-				case ExprNode::TYPE_CURRENT_ROLE:
-				case ExprNode::TYPE_CURRENT_USER:
-				case ExprNode::TYPE_INTERNAL_INFO:
-				case ExprNode::TYPE_LITERAL:
-				case ExprNode::TYPE_NULL:
-				case ExprNode::TYPE_PARAMETER:
-				case ExprNode::TYPE_RECORD_KEY:
-				case ExprNode::TYPE_VARIABLE:
-					return NULL;
-			}
-			break;
+		switch (ExprNode::fromLegacy(expr)->type)
+		{
+			case ExprNode::TYPE_CURRENT_DATE:
+			case ExprNode::TYPE_CURRENT_TIME:
+			case ExprNode::TYPE_CURRENT_TIMESTAMP:
+			case ExprNode::TYPE_CURRENT_ROLE:
+			case ExprNode::TYPE_CURRENT_USER:
+			case ExprNode::TYPE_FIELD:
+			case ExprNode::TYPE_INTERNAL_INFO:
+			case ExprNode::TYPE_LITERAL:
+			case ExprNode::TYPE_NULL:
+			case ExprNode::TYPE_PARAMETER:
+			case ExprNode::TYPE_RECORD_KEY:
+			case ExprNode::TYPE_VARIABLE:
+				return NULL;
+		}
 	}
 
 	VariableNode* var = MAKE_variable(NULL, "", VAR_local, 0, 0, dsqlScratch->hiddenVarsNumber++);
@@ -4349,13 +4260,14 @@
 
 			const dsql_ctx* tmp_ctx = NULL;
 			const TEXT* tmp_name = NULL;
+			const FieldNode* fieldNode;
 			const DerivedFieldNode* derivedField;
 
-			if (temp2->nod_type == nod_field)
+			if ((fieldNode = ExprNode::as<FieldNode>(temp2)))
 			{
-				tmp_ctx = (dsql_ctx*) temp2->nod_arg[e_fld_context];
-				tmp_name = (temp2->nod_arg[e_fld_field] ?
-					((dsql_fld*) temp2->nod_arg[e_fld_field])->fld_name.c_str() : NULL);
+				tmp_ctx = fieldNode->dsqlContext;
+				if (fieldNode->dsqlField)
+					tmp_name = fieldNode->dsqlField->fld_name.c_str();
 			}
 			else if ((derivedField = ExprNode::as<DerivedFieldNode>(temp2)))
 			{
@@ -4543,6 +4455,7 @@
 				{
 					const TEXT* name = NULL;
 					dsql_nod* item = j.object();
+					FieldNode* fieldNode;
 					DerivedFieldNode* derivedField;
 
 					switch (item->nod_type)
@@ -4551,12 +4464,10 @@
 							name = reinterpret_cast<dsql_str*>(item->nod_arg[e_alias_alias])->str_data;
 							break;
 
-						case nod_field:
-							name = reinterpret_cast<dsql_fld*>(item->nod_arg[e_fld_field])->fld_name.c_str();
-							break;
-
 						default:
-							if ((derivedField = ExprNode::as<DerivedFieldNode>(item)))
+							if ((fieldNode = ExprNode::as<FieldNode>(item)))
+								name = fieldNode->dsqlField->fld_name.c_str();
+							else if ((derivedField = ExprNode::as<DerivedFieldNode>(item)))
 								name = derivedField->name.c_str();
 							break;
 					}
@@ -4865,6 +4776,7 @@
 	{
 		dsql_nod* matchingNode = NULL;
 		dsql_nod* node = *ptr;
+		FieldNode* fieldNode;
 		DerivedFieldNode* derivedField;
 
 		switch (node->nod_type)
@@ -4878,16 +4790,13 @@
 				}
 				break;
 
-			case nod_field:
+			default:
+				if ((fieldNode = ExprNode::as<FieldNode>(node)))
 				{
-					const dsql_fld* field = (dsql_fld*) node->nod_arg[e_fld_field];
-					if (field->fld_name == name->str_data)
+					if (fieldNode->dsqlField->fld_name == name->str_data)
 						matchingNode = node;
 				}
-				break;
-
-			default:
-				if ((derivedField = ExprNode::as<DerivedFieldNode>(node)))
+				else if ((derivedField = ExprNode::as<DerivedFieldNode>(node)))
 				{
 					if (strcmp(derivedField->name.c_str(), name->str_data) == 0)
 						matchingNode = node;
@@ -4907,16 +4816,14 @@
 				buffer1[0] = 0;
 				switch (returnNode->nod_type)
 				{
-					case nod_field:
-						strcat(buffer1, "a field");
-						break;
-
 					case nod_alias:
 						strcat(buffer1, "an alias");
 						break;
 
 					default:
-						if ((derivedField = ExprNode::as<DerivedFieldNode>(returnNode)))
+						if (ExprNode::is<FieldNode>(returnNode))
+							strcat(buffer1, "a field");
+						else if (ExprNode::is<DerivedFieldNode>(returnNode))
 							strcat(buffer1, "a derived field");
 						else
 							strcat(buffer1, "an item");
@@ -4928,16 +4835,14 @@
 
 				switch (matchingNode->nod_type)
 				{
-					case nod_field:
-						strcat(buffer2, "a field");
-						break;
-
 					case nod_alias:
 						strcat(buffer2, "an alias");
 						break;
 
 					default:
-						if ((derivedField = ExprNode::as<DerivedFieldNode>(matchingNode)))
+						if (ExprNode::is<FieldNode>(matchingNode))
+							strcat(buffer2, "a field");
+						else if (ExprNode::is<DerivedFieldNode>(matchingNode))
 							strcat(buffer2, "a derived field");
 						else
 							strcat(buffer2, "an item");
@@ -4980,23 +4885,6 @@
 
 	switch (select_item->nod_type)
 	{
-		case nod_field:
-			{
-				const dsql_fld* field = (dsql_fld*) select_item->nod_arg[e_fld_field];
-				DEV_BLKCHK(field, dsql_type_fld);
-
-				// Create a derived field and hook in.
-
-				DerivedFieldNode* newField = FB_NEW(pool) DerivedFieldNode(pool, field->fld_name,
-					dsqlScratch->scopeLevel, select_item);
-
-				dsql_nod* nod = MAKE_node(nod_class_exprnode, 1);
-				nod->nod_arg[0] = reinterpret_cast<dsql_nod*>(newField);
-				nod->nod_desc = select_item->nod_desc;
-
-				return nod;
-			}
-
 		case nod_alias:
 			{
 				const dsql_str* alias_alias = (dsql_str*) select_item->nod_arg[e_alias_alias];
@@ -5017,6 +4905,7 @@
 			{
 				SubQueryNode* subQueryNode;
 				DsqlMapNode* mapNode;
+				FieldNode* fieldNode;
 				DerivedFieldNode* derivedField;
 
 				if ((subQueryNode = ExprNode::as<SubQueryNode>(select_item)))
@@ -5045,6 +4934,19 @@
 						return derived_field;
 					}
 				}
+				else if ((fieldNode = ExprNode::as<FieldNode>(select_item)))
+				{
+					// Create a derived field and hook in.
+
+					DerivedFieldNode* newField = FB_NEW(pool) DerivedFieldNode(pool,
+						fieldNode->dsqlField->fld_name, dsqlScratch->scopeLevel, select_item);
+
+					dsql_nod* nod = MAKE_node(nod_class_exprnode, 1);
+					nod->nod_arg[0] = reinterpret_cast<dsql_nod*>(newField);
+					nod->nod_desc = fieldNode->dsqlDesc;
+
+					return nod;
+				}
 				else if ((derivedField = ExprNode::as<DerivedFieldNode>(select_item)))
 				{
 					// Create a derived field that points to a derived field.
@@ -7086,16 +6988,17 @@
 								name_node = mapNode->map->map_node;
 							}
 
-							if (name_node->nod_type == nod_field)
+							const FieldNode* fieldNode;
+
+							if ((fieldNode = ExprNode::as<FieldNode>(name_node)))
 							{
-								dsql_fld* sub_field = (dsql_fld*) name_node->nod_arg[e_fld_field];
 								// Create new node for alias and copy fieldname
 								alias_node = MAKE_node(nod_alias, e_alias_count);
 								// Copy fieldname to a new string.
 								dsql_str* str_alias = FB_NEW_RPT(*tdbb->getDefaultPool(),
-									sub_field->fld_name.length()) dsql_str;
-								strcpy(str_alias->str_data, sub_field->fld_name.c_str());
-								str_alias->str_length = sub_field->fld_name.length();
+									fieldNode->dsqlField->fld_name.length()) dsql_str;
+								strcpy(str_alias->str_data, fieldNode->dsqlField->fld_name.c_str());
+								str_alias->str_length = fieldNode->dsqlField->fld_name.length();
 								alias_node->nod_arg[e_alias_alias] = (dsql_nod*) str_alias;
 							}
 						}
@@ -7965,24 +7868,27 @@
 		PASS1_field_unknown(qualifier.c_str(), name->str_data, flawedNode);
 	}
 
+	FieldNode* fieldNode;
 	DerivedFieldNode* derivedField;
 
-	if ((derivedField = ExprNode::as<DerivedFieldNode>(node)))
+	if ((fieldNode = ExprNode::as<FieldNode>(node)))
 	{
+		ctx = fieldNode->dsqlContext;
+		return node;
+	}
+	else if ((derivedField = ExprNode::as<DerivedFieldNode>(node)))
+	{
 		ctx = derivedField->context;
 		return node;
 	}
 
-	switch (node->nod_type)
+	if (node->nod_type == nod_alias)
 	{
-	case nod_field:
-		ctx = reinterpret_cast<dsql_ctx*>(node->nod_arg[e_fln_context]);
-		break;
-	case nod_alias:
 		fb_assert(node->nod_count >= (int) e_alias_imp_join - 1);
 		ctx = reinterpret_cast<ImplicitJoin*>(node->nod_arg[e_alias_imp_join])->visibleInContext;
-		break;
-	default:
+	}
+	else
+	{
 		fb_assert(false);
 	}
 
@@ -8107,10 +8013,10 @@
 	if (!par_node)
 		return;
 
-	// Could it be something else ???
-	fb_assert(fld_node->nod_type == nod_field);
+	const FieldNode* fieldNode = ExprNode::as<FieldNode>(fld_node);
+	fb_assert(fieldNode);	// Could it be something else ???
 
-	if (fld_node->nod_desc.dsc_dtype != dtype_array)
+	if (fieldNode->dsqlDesc.dsc_dtype != dtype_array)
 		return;
 
 	switch (par_node->nod_type)
@@ -8141,9 +8047,7 @@
 				{
 					ParameterNode* paramNode = exprNode->as<ParameterNode>();
 					dsql_par* parameter = paramNode->dsqlParameter;
-					const dsql_fld* field = (dsql_fld*) fld_node->nod_arg[e_fld_field];
-					DEV_BLKCHK(field, dsql_type_fld);
-					parameter->par_name = field->fld_name.c_str();
+					parameter->par_name = fieldNode->dsqlField->fld_name.c_str();
 					parameter->par_rel_name = relation->rel_name.c_str();
 					break;
 				}
@@ -8790,20 +8694,6 @@
 			return;
 		}
 
-	case nod_field:
-		{
-			const dsql_ctx* context = (dsql_ctx*) node->nod_arg[e_fld_context];
-			const dsql_rel* relation = context->ctx_relation;
-			const dsql_prc* procedure = context->ctx_procedure;
-			const dsql_fld* field = (dsql_fld*) node->nod_arg[e_fld_field];
-			trace_line("%sfield %s.%s, context %d\n", buffer,
-				(relation != NULL ?
-					relation->rel_name.c_str() :
-					(procedure != NULL ? procedure->prc_name.toString().c_str() : "unknown_db_object")),
-				field->fld_name.c_str(), context->ctx_context);
-			return;
-		}
-
 	case nod_field_name:
 		trace_line("%sfield name: \"", buffer);
 		string = (dsql_str*) node->nod_arg[e_fln_context];


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