From 84f0be56c36f5b2a4359cd22402083dcab1f4ce6 Mon Sep 17 00:00:00 2001
From: Halil Ozan Akgul <hozanakgul@gmail.com>
Date: Mon, 16 Aug 2021 16:28:30 +0300
Subject: [PATCH] Adds EXTRACT cases to get_func_sql_syntax in ruleutils_14.c

Relevant PG commit:
a2da77cdb4661826482ebf2ddba1f953bc74afe4
---
 .../distributed/deparser/ruleutils_14.c       | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/backend/distributed/deparser/ruleutils_14.c b/src/backend/distributed/deparser/ruleutils_14.c
index 75b4b9115..6354bf8a8 100644
--- a/src/backend/distributed/deparser/ruleutils_14.c
+++ b/src/backend/distributed/deparser/ruleutils_14.c
@@ -6641,6 +6641,27 @@ get_func_sql_syntax(FuncExpr *expr, deparse_context *context)
 			appendStringInfoString(buf, "))");
 			return true;
 
+		case F_EXTRACT_TEXT_DATE:
+		case F_EXTRACT_TEXT_TIME:
+		case F_EXTRACT_TEXT_TIMETZ:
+		case F_EXTRACT_TEXT_TIMESTAMP:
+		case F_EXTRACT_TEXT_TIMESTAMPTZ:
+		case F_EXTRACT_TEXT_INTERVAL:
+			/* EXTRACT (x FROM y) */
+			appendStringInfoString(buf, "EXTRACT(");
+			{
+				Const	   *con = (Const *) linitial(expr->args);
+
+				Assert(IsA(con, Const) &&
+					   con->consttype == TEXTOID &&
+					   !con->constisnull);
+				appendStringInfoString(buf, TextDatumGetCString(con->constvalue));
+			}
+			appendStringInfoString(buf, " FROM ");
+			get_rule_expr((Node *) lsecond(expr->args), context, false);
+			appendStringInfoChar(buf, ')');
+			return true;
+
 		case F_IS_NORMALIZED:
 			/* IS xxx NORMALIZED */
 			appendStringInfoString(buf, "((");