From 384179b406612c962f34f069ffd40cbd006a9ab6 Mon Sep 17 00:00:00 2001
From: zhanglihui <zhanglihui@gbase.cn>
Date: Sat, 7 Oct 2023 02:57:12 -0700
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8Dmysql=E5=85=BC=E5=AE=B9?=
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---
 src/bin/pg_dump/dumputils.cpp |  8 +++++++-
 src/bin/psql/describe.cpp     | 11 +++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/bin/pg_dump/dumputils.cpp b/src/bin/pg_dump/dumputils.cpp
index cb0c030fa..976ee456f 100644
--- a/src/bin/pg_dump/dumputils.cpp
+++ b/src/bin/pg_dump/dumputils.cpp
@@ -42,6 +42,8 @@ const char *gdatcompatibility = NULL;
 char* binary_upgrade_oldowner = NULL;
 char* binary_upgrade_newowner = NULL;
 
+int dolphin_lower_case_table_names = -1;
+
 #define MAX_ON_EXIT_NICELY 20
 
 static struct {
@@ -1177,7 +1179,11 @@ bool processSQLNamePattern(PGconn* conn, PQExpBuffer buf, const char* pattern, b
             }
             cp++;
         } else if (!inquotes && isupper((unsigned char)ch)) {
-            appendPQExpBufferChar(&namebuf, pg_tolower((unsigned char)ch));
+            if (dolphin_lower_case_table_names == 0){
+                appendPQExpBufferChar(&namebuf, ch);
+            } else {
+                appendPQExpBufferChar(&namebuf, pg_tolower((unsigned char)ch));
+            }
             cp++;
         } else if (!inquotes && ch == '*') {
             appendPQExpBufferStr(&namebuf, ".*");
diff --git a/src/bin/psql/describe.cpp b/src/bin/psql/describe.cpp
index 91618c52d..f3c384f54 100644
--- a/src/bin/psql/describe.cpp
+++ b/src/bin/psql/describe.cpp
@@ -74,6 +74,8 @@ static bool* generateTranslateColumns(int n, int truesz, int* trues);
 const char* ORIENTATION_TIMESERIES = "timeseries";
 const char* TS_PSEUDO_DIST_COLUMN = "ts_pseudo_distcol";
 
+extern int dolphin_lower_case_table_names;
+
 /* ----------------
  * Handlers for various slash commands displaying some sort of list
  * of things in the database.
@@ -1134,6 +1136,15 @@ bool describeTableDetails(const char* pattern, bool verbose, bool showSystem)
     PGresult* res = NULL;
     int i;
 
+    PGresult* res_lower_case_table_names = NULL;
+    res_lower_case_table_names = PSQLexec("select setting from pg_settings where name = 'dolphin.lower_case_table_names';", false);
+    if (PQntuples(res_lower_case_table_names) == 1){
+        dolphin_lower_case_table_names = atoi(PQgetvalue(res_lower_case_table_names, 0, 0));
+    } else {
+        dolphin_lower_case_table_names = -1;
+    }
+    PQclear(res_lower_case_table_names);
+
     initPQExpBuffer(&buf);
 
     printfPQExpBuffer(&buf,