From a9c7cfcf257eb8e8c43e8af5fcc64e12e2dea4a6 Mon Sep 17 00:00:00 2001
From: Gil Forsyth <gil@forsyth.dev>
Date: Fri, 12 Apr 2024 16:57:41 -0400
Subject: [PATCH] chore(flink): fix regex digit escape

This might not be sufficient for all regexes, but now sqlgot now stores
unescaped strings and then escapes them during generation, which for the
`Flink(Hive)` case meant doubling up backslashes on `\\d`
---
 ibis/backends/sql/dialects.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ibis/backends/sql/dialects.py b/ibis/backends/sql/dialects.py
index f1aadc4d64e35..3e01e80bf1d53 100644
--- a/ibis/backends/sql/dialects.py
+++ b/ibis/backends/sql/dialects.py
@@ -112,6 +112,8 @@ def _interval_with_precision(self, e):
 
 
 class Flink(Hive):
+    UNESCAPED_SEQUENCES = {"\\\\d": "\\d"}
+
     class Generator(Hive.Generator):
         TYPE_MAPPING = Hive.Generator.TYPE_MAPPING.copy() | {
             sge.DataType.Type.TIME: "TIME",