!2001 b 兼容特性：create table/index/function/procedure/funciton support

Merge pull request !2001 from 吴岳川/comment

src/include/knl/knl_session.h

@@ -419,6 +419,8 @@ typedef struct knl_u_parser_context {
     bool isCreateFuncOrProc;
     
     bool isTimeCapsule;
+
+    bool hasPartitionComment;
 } knl_u_parser_context;
 
 typedef struct knl_u_trigger_context {

src/include/nodes/parsenodes_common.h

@@ -824,7 +824,8 @@ typedef enum AlterTableType {
     AT_SplitSubPartition,
     /* this will be in a more natural position in 9.3: */
     AT_ReAddConstraint, /* internal to commands/tablecmds.c */
-    AT_AddIntoCBI
+    AT_AddIntoCBI,
+    AT_COMMENTS,
 } AlterTableType;
 
 typedef enum AlterTableStatProperty { /* Additional Property for AlterTableCmd */
@@ -1318,6 +1319,7 @@ typedef struct Constraint {
     bool skip_validation; /* skip validation of existing rows? */
     bool initially_valid; /* mark the new constraint as valid? */
 
+    List* constraintOptions; /* opt_index_options from gram.y */
     /*
      * @hdfs
      * Field used for soft constraint, which works on HDFS foreign table.