gjacoby126 commented on a change in pull request #1233:
URL: https://github.com/apache/phoenix/pull/1233#discussion_r634812788



##########
File path: 
phoenix-tools/src/main/java/org/apache/phoenix/schema/SchemaSynthesisProcessor.java
##########
@@ -154,7 +156,24 @@ private CreateTableStatement 
getCreateTableStatement(AddColumnStatement alterSta
         } else {
             newColDef.addAll(oldColDef);
             newColDef.addAll(addStmt.getColumnDefs());
-            newCreateStmt = new CreateTableStatement(createStmt, newColDef);
+            PrimaryKeyConstraint oldPKConstraint = 
createStmt.getPrimaryKeyConstraint();
+            List<ColumnDefInPkConstraint> pkList = new ArrayList<>();
+            for(Pair<ColumnName, SortOrder> entry : 
oldPKConstraint.getColumnNames()) {
+                ColumnDefInPkConstraint cd = new
+                        ColumnDefInPkConstraint(entry.getFirst(), 
entry.getSecond(), oldPKConstraint.isColumnRowTimestamp(entry
+                .getFirst()));
+                pkList.add(cd);
+            }
+            for(ColumnDef cd : addStmt.getColumnDefs()) {

Review comment:
       What if the ALTER tries to add an existing PK column? 

##########
File path: 
phoenix-tools/src/it/java/org/apache/phoenix/schema/SchemaToolSynthesisIT.java
##########
@@ -154,18 +154,19 @@ public void testCreateIndexStatement_dropIndex() throws 
Exception {
     private void runAndVerify(String expected, String baseDDL) throws 
Exception {
         String[] arg = { "-m", "SYNTH", "-d", baseDDL };
         String result = runSchemaTool(null, arg);
+        System.out.println(result);

Review comment:
       Can cut out the println. 




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