fix: track derived table aliases

models/Grammars/OracleGrammar.cfc

@@ -126,11 +126,7 @@ component extends="qb.models.Grammars.BaseGrammar" singleton {
             return "FROM DUAL";
         }
 
-        var fullTable = arguments.tableName;
-        if ( query.getAlias() != "" ) {
-            fullTable &= " #query.getAlias()#";
-        }
-        return "FROM " & wrapTable( fullTable );
+        return "FROM " & wrapQueryTable( arguments.query );
     }
 
     /**

models/Query/QueryBuilder.cfc

@@ -981,6 +981,7 @@ component displayname="QueryBuilder" accessors="true" extends="qb.models.Query.J
 
             // generate the derived table SQL
             this.fromRaw( getGrammar().wrapTable( "(#arguments.input.toSQL()#) AS #arguments.alias#" ) );
+            variables.alias = arguments.alias;
             variables.grammarCompiledFrom = true;
             addBindings( arguments.input.getBindings(), "from" );
             return this;

tests/resources/querybuilder/AbstractQueryBuilderSourceSpec.cfc

@@ -50,6 +50,7 @@ component extends="tests.resources.querybuilder.AbstractQueryBuilderSubselectSpe
                                 .where( "age", ">=", "21" );
 
                             builder.fromSub( "u", derivedTable );
+                            expect( builder.getAlias() ).toBe( "u" );
                         }, fromDerivedTable() );
                     } );
 
@@ -60,6 +61,7 @@ component extends="tests.resources.querybuilder.AbstractQueryBuilderSubselectSpe
                                     .from( "users" )
                                     .where( "age", ">=", "21" );
                             } );
+                            expect( builder.getAlias() ).toBe( "u" );
                         }, fromDerivedTable() );
                     } );
 

tests/specs/Query/Abstract/BuilderSelectSpec.cfc

@@ -315,6 +315,14 @@ component extends="testbox.system.BaseSpec" {
             } );
 
             describe( "setGrammar()", function() {
+                it( "tracks a derived table alias", function() {
+                    query.fromSub( "active_users", function( subquery ) {
+                        subquery.from( "users" );
+                    } );
+
+                    expect( query.getAlias() ).toBe( "active_users" );
+                } );
+
                 it( "rejects grammar changes after compiling a derived table", function() {
                     query.fromSub( "active_users", function( subquery ) {
                         subquery.from( "users" );