removes ' from select attribute names

src/main/kotlin/unibz.cs.semint.kprime/usecase/common/SQLizeSelectUseCase.kt

@@ -40,7 +40,7 @@ class SQLizeSelectUseCase {
     fun sqlizeSelect(select : Select):String {
         var sql = ""
         sql += "SELECT " + select.attributes
-                .map { a -> "'${a.name}'" }.toList().joinToString(",") + System.lineSeparator()
+                .map { a -> "${a.name}" }.toList().joinToString(",") + System.lineSeparator()
         sql += "FROM "
         sql = sqlizeFrom(select, sql)
         if (!select.where.condition.isEmpty()) {

src/test/kotlin/unibz.cs.semint.kprime/domain/MappingTest.kt

@@ -150,7 +150,7 @@ class MappingTest {
         val actualSQL = SQLizeCreateUseCase().createViewCommand(mapping)
         assertEquals("""
 CREATE OR REPLACE VIEW public.query1 AS
-SELECT 'student.first_name','student.last_name','course.name'
+SELECT student.first_name,student.last_name,course.name
 FROM   student
  JOIN student_course
 ON student.id = student_course.student_id
@@ -182,7 +182,7 @@ ON course.id = student_course.course_id
         // then
         assertEquals("""
 CREATE OR REPLACE VIEW public.poid_ssn AS
-SELECT 't1.ssn','t2.ssn'
+SELECT t1.ssn,t2.ssn
 FROM   T AS t1
  JOIN T AS t2
 ON t1.ssn = t2.ssn2

src/test/kotlin/unibz.cs.semint.kprime/domain/QueryTest.kt

@@ -68,7 +68,7 @@ class QueryTest {
         var querySql = SQLizeSelectUseCase().sqlize(query)
         // then
         assertEquals1("""
-            SELECT 'Name','Surname'
+            SELECT Name,Surname
             FROM   Table1
             WHERE Name='Gigi' LIMIT 10
             """.trimIndent(),querySql)
@@ -90,7 +90,7 @@ class QueryTest {
         val selectSql = SQLizeSelectUseCase().sqlizeSelect(select)
         // then
         assertEquals1("""
-            SELECT 'ww'
+            SELECT ww
             FROM   tab
             WHERE a = b LIMIT 10
         """.trimIndent(),selectSql)
@@ -118,7 +118,7 @@ class QueryTest {
         val selectSql = SQLizeSelectUseCase().sqlizeSelect(select)
         // then
         assertEquals1("""
-            SELECT 'ww'
+            SELECT ww
             FROM   Orders
             INNER JOIN Customer
             ON Orders.customerId = Customer.customerId
@@ -155,7 +155,7 @@ class QueryTest {
         val selectSql = SQLizeSelectUseCase().sqlizeSelect(select)
         // then
         assertEquals1("""
-            SELECT 'ww'
+            SELECT ww
             FROM   Orders
             INNER JOIN Customer
             ON Orders.customerId = Customer.customerId
@@ -208,11 +208,11 @@ class QueryTest {
         var querySql = SQLizeSelectUseCase().sqlize(query)
         // then
         assertEquals1("""
-            SELECT 'Name','Surname'
+            SELECT Name,Surname
             FROM   Table1
             WHERE Name='Gigi' LIMIT 10
             UNION
-            SELECT 'Name','Surname'
+            SELECT Name,Surname
             FROM   Table2
             WHERE Name='Gigi' LIMIT 10
             """.trimIndent(),querySql)
@@ -315,15 +315,15 @@ class QueryTest {
 
         val sqlize = SQLizeSelectUseCase().sqlize(query)
         assertEquals("""
-            SELECT 'alfa','beta'
+            SELECT alfa,beta
             FROM   tab1
             WHERE a = b LIMIT 10
             UNION
-            SELECT 'gamma','theta'
+            SELECT gamma,theta
             FROM   tab2
             WHERE c = d LIMIT 10
             UNION
-            SELECT 'delta','zeta'
+            SELECT delta,zeta
             FROM   tab3
             WHERE e = f LIMIT 10
         """.trimIndent(),sqlize)