support timestamp_add

Author: todd5167

core/src/main/java/com/dtstack/flink/sql/side/SideSqlExec.java

@@ -520,6 +520,8 @@ private SqlNode replaceSelectFieldName(SqlNode selectNode, HashBasedTable<String
                 || selectNode.getKind() == IS_NULL
                 || selectNode.getKind() == IS_NOT_NULL
                 || selectNode.getKind() == CONTAINS
+                || selectNode.getKind() == TIMESTAMP_ADD
+                || selectNode.getKind() == TIMESTAMP_DIFF
 
                 ){
             SqlBasicCall sqlBasicCall = (SqlBasicCall) selectNode;

core/src/main/java/com/dtstack/flink/sql/util/ParseUtils.java

@@ -159,6 +159,8 @@ public static SqlNode replaceSelectFieldTabName(SqlNode selectNode, Map<String,S
                 || selectNode.getKind() == IS_NULL
                 || selectNode.getKind() == IS_NOT_NULL
                 || selectNode.getKind() == CONTAINS
+                || selectNode.getKind() == TIMESTAMP_ADD
+                || selectNode.getKind() == TIMESTAMP_DIFF
 
                 ){
             SqlBasicCall sqlBasicCall = (SqlBasicCall) selectNode;