From 00379bef50e59e29a034923610309927c6573b9d Mon Sep 17 00:00:00 2001
From: Jiangshan <59380643+Jiangshan0406@users.noreply.github.com>
Date: Wed, 7 Sep 2022 19:04:15 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8DPG=E4=B8=ADcollate=E5=90=8E?=
 =?UTF-8?q?=E5=87=BA=E7=8E=B0.=E5=AF=BC=E8=87=B4=E8=A7=A3=E6=9E=90?=
 =?UTF-8?q?=E5=A4=B1=E8=B4=A5=E7=9A=84=E6=83=85=E5=86=B5=EF=BC=8Cissue?=
 =?UTF-8?q?=EF=BC=9Ahttps://github.com/alibaba/druid/issues/4375?=
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---
 .../druid/sql/parser/SQLExprParser.java        | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java b/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
index 923bd7b3d7..090f988310 100644
--- a/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
+++ b/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
@@ -4542,12 +4542,24 @@ public class SQLExprParser extends SQLParser {
             if (lexer.token == Token.LITERAL_ALIAS
                     || lexer.token == Token.IDENTIFIER
                     || lexer.token == Token.LITERAL_CHARS) {
-                charType.setCollate(lexer.stringVal());
+                StringBuilder collate = new StringBuilder(lexer.stringVal());
+                lexer.nextToken();
+                if (lexer.token == Token.DOT){
+                    lexer.nextToken();
+                    if (lexer.token == Token.LITERAL_ALIAS
+                            || lexer.token == Token.IDENTIFIER
+                            || lexer.token == Token.LITERAL_CHARS){
+                        collate.append(".").append(lexer.stringVal()); 
+                        lexer.nextToken();
+
+                    } else {
+                        throw new ParserException(lexer.info());
+                    }
+                }
+                charType.setCollate(collate.toString());
             } else {
                 throw new ParserException(lexer.info());
             }
-
-            lexer.nextToken();
         }
 
         return charType;