#393 Simplify OracleDialect generated queries

Author: ericbn

activejdbc/src/main/java/org/javalite/activejdbc/dialects/DefaultDialect.java

@@ -99,17 +99,11 @@ protected void appendSubQuery(StringBuilder query, String subQuery) {
         }
     }
 
-    protected void appendSelect(StringBuilder query, String tableName, String tableAlias, String subQuery,
-            List<String> orderBys) {
+    protected void appendSelect(StringBuilder query, String tableName, String subQuery, List<String> orderBys) {
         if (tableName == null) {
             query.append(subQuery);
         } else {
-            if (tableAlias == null) {
-                query.append("SELECT * FROM ").append(tableName);
-            } else {
-                query.append("SELECT ").append(tableAlias).append(".* FROM ").append(tableName).append(' ')
-                        .append(tableAlias);
-            }
+            query.append("SELECT * FROM ").append(tableName);
             appendSubQuery(query, subQuery);
         }
         appendOrderBy(query, orderBys);
@@ -118,7 +112,7 @@ protected void appendSelect(StringBuilder query, String tableName, String tableA
     @Override
     public String formSelect(String tableName, String subQuery, List<String> orderBys, long limit, long offset) {
         StringBuilder fullQuery = new StringBuilder();
-        appendSelect(fullQuery, tableName, null, subQuery, orderBys);
+        appendSelect(fullQuery, tableName, subQuery, orderBys);
         return fullQuery.toString();
     }
 

activejdbc/src/main/java/org/javalite/activejdbc/dialects/OracleDialect.java

@@ -55,16 +55,15 @@ public String formSelect(String tableName, String subQuery, List<String> orderBy
 
         StringBuilder fullQuery = new StringBuilder();
         if (needOffset) {
-            fullQuery.append("SELECT * FROM (SELECT t2.*, ROWNUM AS oracle_row_number FROM (");
+            fullQuery.append("SELECT * FROM (SELECT a.*, ROWNUM AS oracle_row_number FROM (");
         } else if (needLimit) { // if needLimit and don't needOffset
             fullQuery.append("SELECT * FROM (");
         }
-        //TODO check if this can be simplified removing the alias t
-        appendSelect(fullQuery, tableName, (needLimit || needOffset) ? "t" : null, subQuery, orderBys);
+        appendSelect(fullQuery, tableName, subQuery, orderBys);
 
         if (needOffset) {
             // Oracle offset starts with 1, not like MySQL with 0;
-            fullQuery.append(") t2) WHERE oracle_row_number >= ").append(offset + 1);
+            fullQuery.append(") a) WHERE oracle_row_number >= ").append(offset + 1);
             if (needLimit) {
                 fullQuery.append(" AND ROWNUM <= ").append(limit);
             }

activejdbc/src/main/java/org/javalite/activejdbc/dialects/PostgreSQLDialect.java

@@ -20,8 +20,8 @@ public class PostgreSQLDialect extends DefaultDialect {
     @Override
     public String formSelect(String tableName, String subQuery, List<String> orderBys, long limit, long offset) {
         StringBuilder fullQuery = new StringBuilder();
-        
-        appendSelect(fullQuery, tableName, null, subQuery, orderBys);
+
+        appendSelect(fullQuery, tableName, subQuery, orderBys);
 
         if(limit != -1){
             fullQuery.append(" LIMIT ").append(limit);