Fix serialization of expr AEXPR_NOT_DISTINCT.

It is introduced by commit Import Greenplum source code.
Forget to read/out that expr them.

Authored-by: Zhang Mingli avamingli@gmail.com

Author: avamingli

src/backend/nodes/outfast.c

@@ -491,6 +491,10 @@ _outAExpr(StringInfo str, A_Expr *node)
 			break;
 		case AEXPR_DISTINCT:
 
+			WRITE_NODE_FIELD(name);
+			break;
+		case AEXPR_NOT_DISTINCT:
+
 			WRITE_NODE_FIELD(name);
 			break;
 		case AEXPR_NULLIF:

src/backend/nodes/readfast.c

@@ -556,6 +556,9 @@ _readAExpr(void)
 			break;
 		case AEXPR_DISTINCT:
 
+			READ_NODE_FIELD(name);
+			break;
+		case AEXPR_NOT_DISTINCT:
 			READ_NODE_FIELD(name);
 			break;
 		case AEXPR_NULLIF:

src/test/regress/expected/create_table.out

@@ -1282,6 +1282,10 @@ CREATE UNLOGGED TABLE unlogged_toast (a text);
 NOTICE:  Table doesn't have 'DISTRIBUTED BY' clause -- Using column named 'a' as the Cloudberry Database data distribution key for this table.
 HINT:  The 'DISTRIBUTED BY' clause determines the distribution of data. Make sure column(s) chosen are the optimal data distribution key to minimize skew.
 TRUNCATE unlogged_toast;
+-- test https://github.com/cloudberrydb/cloudberrydb/issues/595
+CREATE TABLE t_issue_595(c0 DECIMAL UNIQUE DEFAULT (0.059636344153715326) PRIMARY KEY,
+	c1 money CHECK (((t_issue_595.c1)IS NOT DISTINCT FROM(CAST(0.6099821 AS MONEY)))) NULL, c2 TEXT );
+DROP TABLE t_issue_595;
 -- tests of column drop with partition tables and indexes using
 -- predicates and expressions.
 create table part_column_drop (

src/test/regress/sql/create_table.sql

@@ -962,6 +962,11 @@ drop table defcheck;
 CREATE UNLOGGED TABLE unlogged_toast (a text);
 TRUNCATE unlogged_toast;
 
+-- test https://github.com/cloudberrydb/cloudberrydb/issues/595
+CREATE TABLE t_issue_595(c0 DECIMAL UNIQUE DEFAULT (0.059636344153715326) PRIMARY KEY,
+	c1 money CHECK (((t_issue_595.c1)IS NOT DISTINCT FROM(CAST(0.6099821 AS MONEY)))) NULL, c2 TEXT );
+DROP TABLE t_issue_595;
+
 -- tests of column drop with partition tables and indexes using
 -- predicates and expressions.
 create table part_column_drop (