@@ -389,6 +389,7 @@ primaryExpression
     | KEY (dbName=identifier DOT)? keyName=identifier                                          #encryptKey
     | EXTRACT LEFT_PAREN field=identifier FROM (DATE | TIMESTAMP)?
       source=valueExpression RIGHT_PAREN                                                       #extract
+    | primaryExpression COLLATE (identifier | STRING_LITERAL | DEFAULT)                        #collate
     ;
 
 functionIdentifier 
 
@@ -33,6 +33,7 @@
 import org.apache.doris.nereids.DorisParser.BooleanLiteralContext;
 import org.apache.doris.nereids.DorisParser.BracketJoinHintContext;
 import org.apache.doris.nereids.DorisParser.BracketRelationHintContext;
+import org.apache.doris.nereids.DorisParser.CollateContext;
 import org.apache.doris.nereids.DorisParser.ColumnReferenceContext;
 import org.apache.doris.nereids.DorisParser.CommentJoinHintContext;
 import org.apache.doris.nereids.DorisParser.CommentRelationHintContext;
@@ -2054,4 +2055,9 @@ private String parseConstant(ConstantContext context) {
         }
         return context.getText();
     }
+
+    @Override
+    public Object visitCollate(CollateContext ctx) {
+        return visit(ctx.primaryExpression());
+    }
 }
@@ -348,6 +348,7 @@ public void testParseCast() {
     }
 
     @Test
+
     void testParseExprDepthWidth() {
         String sql = "SELECT 1+2 = 3 from t";
         NereidsParser nereidsParser = new NereidsParser();
@@ -357,4 +358,11 @@ void testParseExprDepthWidth() {
         Assertions.assertEquals(4, logicalPlan.getExpressions().get(0).getDepth());
         Assertions.assertEquals(3, logicalPlan.getExpressions().get(0).getWidth());
     }
+
+    @Test
+    public void testParseCollate() {
+        String sql = "SELECT * FROM t1 WHERE col COLLATE utf8 = 'test'";
+        NereidsParser nereidsParser = new NereidsParser();
+        nereidsParser.parseSingle(sql);
+    }
 }
@@ -0,0 +1,25 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+suite("collate_grammar_test") {
+    sql "set enable_nereids_planner=true;"
+    sql "set enable_fallback_to_original_planner=false;"
+    sql """
+        select table_name from information_schema.tables         where table_schema collate utf8_general_ci = 'information_schema'           and table_name collate utf8_general_ci = 'parameters';
+    """
+
+}
Original file line number	Diff line number	Diff line change
`@@ -389,6 +389,7 @@ primaryExpression`
`389`	`389`	`\| KEY (dbName=identifier DOT)? keyName=identifier #encryptKey`
`390`	`390`	`\| EXTRACT LEFT_PAREN field=identifier FROM (DATE \| TIMESTAMP)?`
`391`	`391`	`source=valueExpression RIGHT_PAREN #extract`
	`392`	`+ \| primaryExpression COLLATE (identifier \| STRING_LITERAL \| DEFAULT) #collate`
`392`	`393`	`;`
`393`	`394`
`394`	`395`	`functionIdentifier`
Original file line number	Diff line number	Diff line change
`@@ -33,6 +33,7 @@`
`33`	`33`	`import org.apache.doris.nereids.DorisParser.BooleanLiteralContext;`
`34`	`34`	`import org.apache.doris.nereids.DorisParser.BracketJoinHintContext;`
`35`	`35`	`import org.apache.doris.nereids.DorisParser.BracketRelationHintContext;`
	`36`	`+import org.apache.doris.nereids.DorisParser.CollateContext;`
`36`	`37`	`import org.apache.doris.nereids.DorisParser.ColumnReferenceContext;`
`37`	`38`	`import org.apache.doris.nereids.DorisParser.CommentJoinHintContext;`
`38`	`39`	`import org.apache.doris.nereids.DorisParser.CommentRelationHintContext;`
`@@ -2054,4 +2055,9 @@ private String parseConstant(ConstantContext context) {`
`2054`	`2055`	`}`
`2055`	`2056`	`return context.getText();`
`2056`	`2057`	`}`
	`2058`	`+`
	`2059`	`+ @Override`
	`2060`	`+ public Object visitCollate(CollateContext ctx) {`
	`2061`	`+ return visit(ctx.primaryExpression());`
	`2062`	`+ }`
`2057`	`2063`	`}`
Original file line number	Diff line number	Diff line change
`@@ -348,6 +348,7 @@ public void testParseCast() {`
`348`	`348`	`}`
`349`	`349`
`350`	`350`	`@Test`
	`351`	`+`
`351`	`352`	`void testParseExprDepthWidth() {`
`352`	`353`	`String sql = "SELECT 1+2 = 3 from t";`
`353`	`354`	`NereidsParser nereidsParser = new NereidsParser();`
`@@ -357,4 +358,11 @@ void testParseExprDepthWidth() {`
`357`	`358`	`Assertions.assertEquals(4, logicalPlan.getExpressions().get(0).getDepth());`
`358`	`359`	`Assertions.assertEquals(3, logicalPlan.getExpressions().get(0).getWidth());`
`359`	`360`	`}`
	`361`	`+`
	`362`	`+ @Test`
	`363`	`+ public void testParseCollate() {`
	`364`	`+ String sql = "SELECT * FROM t1 WHERE col COLLATE utf8 = 'test'";`
	`365`	`+ NereidsParser nereidsParser = new NereidsParser();`
	`366`	`+ nereidsParser.parseSingle(sql);`
	`367`	`+ }`
`360`	`368`	`}`