fix 6753 (#6915)

shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/MySQLVisitor.java

@@ -29,7 +29,6 @@ import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementParser.BitExpr
 import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementParser.BitValueLiteralsContext;
 import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementParser.BooleanLiteralsContext;
 import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementParser.BooleanPrimaryContext;
-import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementParser.CaseExpressionContext;
 import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementParser.CastFunctionContext;
 import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementParser.CharFunctionContext;
 import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementParser.ColumnNameContext;
@@ -392,7 +391,7 @@ public abstract class MySQLVisitor extends MySQLStatementBaseVisitor<ASTNode> {
             return new SubqueryExpressionSegment((SubquerySegment) astNode);
         }
         if (astNode instanceof OtherLiteralValue) {
-            return new CommonExpressionSegment(context.getStart().getStartIndex(), context.getStop().getStopIndex(), context.getText());
+            return new CommonExpressionSegment(context.getStart().getStartIndex(), context.getStop().getStopIndex(), ((OtherLiteralValue) astNode).getValue());
         }
         return astNode;
     }
@@ -587,7 +586,9 @@ public abstract class MySQLVisitor extends MySQLStatementBaseVisitor<ASTNode> {
     
     private ASTNode visitRemainSimpleExpr(final SimpleExprContext ctx) {
         if (null != ctx.caseExpression()) {
-            return visit(ctx.caseExpression());
+            visit(ctx.caseExpression());
+            String text = ctx.start.getInputStream().getText(new Interval(ctx.start.getStartIndex(), ctx.stop.getStopIndex()));
+            return new OtherLiteralValue(text);
         }
         for (ExprContext each : ctx.expr()) {
             visit(each);
@@ -606,12 +607,6 @@ public abstract class MySQLVisitor extends MySQLStatementBaseVisitor<ASTNode> {
         return new CommonExpressionSegment(ctx.getStart().getStartIndex(), ctx.getStop().getStopIndex(), text);
     }
     
-    @Override
-    public final ASTNode visitCaseExpression(final CaseExpressionContext ctx) {
-        String text = ctx.start.getInputStream().getText(new Interval(ctx.start.getStartIndex(), ctx.stop.getStopIndex()));
-        return new OtherLiteralValue(text);
-    }
-    
     @Override
     public final ASTNode visitDataTypeName(final DataTypeNameContext ctx) {
         return new KeywordValue(ctx.getText());

shardingsphere-sql-parser/shardingsphere-sql-parser-test/src/test/resources/case/dml/update.xml

@@ -447,4 +447,40 @@
             </and-predicate>
         </where>
     </update>
+
+    <update sql-case-id="update_with_case_when" parameters="3, 2, 4, 2, 10, 2, 3, 'll', 4, 'll', 10, 'll', 3, '2020-08-10T17:15:25.979+0800', 'jd'">
+        <table name="stock_freeze_detail" start-index="7" stop-index="25" />
+        <set start-index="27" stop-index="230" literal-stop-index="270" literal-start-index="27" >
+            <assignment start-index="31" stop-index="106" literal-start-index="31" literal-stop-index="107">
+                <column name="row_status" start-index="31" stop-index="40" />
+                <assignment-value>
+                    <common-expression text="case WHEN (id=?) THEN ? WHEN (id=?) THEN ? WHEN (id=?) THEN ? end" literal-text="case WHEN (id=3) THEN 2 WHEN (id=4) THEN 2 WHEN (id=10) THEN 2 end" start-index="42" stop-index="106" literal-start-index="42" literal-stop-index="107"/>
+                </assignment-value>
+            </assignment>
+            <assignment start-index="113" stop-index="189" literal-start-index="114" literal-stop-index="200">
+                <column name="update_user" start-index="113" stop-index="123" literal-start-index="114" literal-stop-index="124"/>
+                <assignment-value>
+                    <common-expression text="case WHEN (id=?) THEN ? WHEN (id=?) THEN ? WHEN (id=?) THEN ? end" literal-text="case WHEN (id=3) THEN 'll' WHEN (id=4) THEN 'll' WHEN (id=10) THEN 'll' end" start-index="125" stop-index="189" literal-start-index="126" literal-stop-index="200"/>
+                </assignment-value>
+            </assignment>
+            <assignment start-index="192" stop-index="230" literal-start-index="203" literal-stop-index="270">
+                <column name="update_time" start-index="192" stop-index="202" literal-start-index="203" literal-stop-index="213" />
+                <assignment-value>
+                    <common-expression text="case WHEN (id=?) THEN ? end" literal-text="case WHEN (id=3) THEN '2020-08-10T17:15:25.979+0800' end" start-index="204" stop-index="230" literal-start-index="215" literal-stop-index="270"/>
+                </assignment-value>
+            </assignment>
+        </set>
+        <where start-index="232" stop-index="251" literal-start-index="272" literal-stop-index="294">
+            <and-predicate>
+                <predicate start-index="239" stop-index="251" literal-start-index="279" literal-stop-index="294">
+                    <column-left-value name="tenant_id" start-index="239" stop-index="247" literal-start-index="279" literal-stop-index="287" />
+                    <operator type="=" />
+                    <compare-right-value>
+                        <parameter-marker-expression value="14" start-index="251" stop-index="251"/>
+                        <literal-expression value="jd" literal-start-index="291" literal-stop-index="294"/>
+                    </compare-right-value>
+                </predicate>
+            </and-predicate>
+        </where>
+    </update>
 </sql-parser-test-cases>

shardingsphere-sql-parser/shardingsphere-sql-parser-test/src/test/resources/sql/supported/dml/update.xml

@@ -29,4 +29,6 @@
     <sql-case id="update_with_set_calculation" value="UPDATE t_order SET status = status - ? WHERE order_id = ? AND user_id = ?" />
     <sql-case id="update_with_where_calculation" value="UPDATE t_order SET status = ? WHERE order_id = order_id - ? AND user_id = ?" />
     <sql-case id="update_with_column_equal_column" value="update t_order set order_id = order_id, status = 'init' where order_id = order_id AND order_id = ?" db-types="MySQL"/>
+    <sql-case id="update_with_case_when" value="update stock_freeze_detail set row_status=case WHEN (id=?) THEN ? WHEN (id=?) THEN ? WHEN (id=?) THEN ? end,
+    update_user=case WHEN (id=?) THEN ? WHEN (id=?) THEN ? WHEN (id=?) THEN ? end, update_time=case WHEN (id=?) THEN ? end where  tenant_id = ?" db-types="MySQL"/>
 </sql-cases>