diff --git a/fe/fe-core/src/main/java/com/starrocks/connector/parser/pinot/AstBuilder.java b/fe/fe-core/src/main/java/com/starrocks/connector/parser/pinot/AstBuilder.java
index 142b3eab97c10..eaacbe808b651 100644
--- a/fe/fe-core/src/main/java/com/starrocks/connector/parser/pinot/AstBuilder.java
+++ b/fe/fe-core/src/main/java/com/starrocks/connector/parser/pinot/AstBuilder.java
@@ -13,8 +13,6 @@
 // limitations under the License.
 package com.starrocks.connector.parser.pinot;
 
-import com.starrocks.analysis.AnalyticExpr;
-import com.starrocks.analysis.AnalyticWindow;
 import com.starrocks.analysis.ArithmeticExpr;
 import com.starrocks.analysis.Expr;
 import com.starrocks.analysis.FunctionCallExpr;
@@ -22,24 +20,15 @@
 import com.starrocks.analysis.FunctionParams;
 import com.starrocks.analysis.HintNode;
 import com.starrocks.analysis.IntLiteral;
-import com.starrocks.analysis.OrderByElement;
 import com.starrocks.analysis.ParseNode;
-import com.starrocks.sql.ast.Identifier;
-import com.starrocks.sql.ast.QualifiedName;
 import com.starrocks.sql.parser.NodePosition;
 import com.starrocks.sql.parser.StarRocksParser;
 import com.starrocks.sql.parser.SyntaxSugars;
 import org.antlr.v4.runtime.ParserRuleContext;
-import org.antlr.v4.runtime.RuleContext;
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.antlr.v4.runtime.tree.TerminalNode;
 
-import java.util.ArrayList;
 import java.util.IdentityHashMap;
 import java.util.List;
 
-import static java.util.stream.Collectors.toList;
-
 public class AstBuilder extends com.starrocks.sql.parser.AstBuilder {
 
     protected AstBuilder(long sqlMode) {
@@ -82,45 +71,4 @@ public ParseNode visitSimpleFunctionCall(StarRocksParser.SimpleFunctionCallConte
             return SyntaxSugars.parse(functionCallExpr);
         }
     }
-
-    private AnalyticExpr buildOverClause(FunctionCallExpr functionCallExpr, StarRocksParser.OverContext context,
-                                         NodePosition pos) {
-        functionCallExpr.setIsAnalyticFnCall(true);
-        List<OrderByElement> orderByElements = new ArrayList<>();
-        if (context.ORDER() != null) {
-            orderByElements = visit(context.sortItem(), OrderByElement.class);
-        }
-        List<Expr> partitionExprs = visit(context.partition, Expr.class);
-        return new AnalyticExpr(functionCallExpr, partitionExprs, orderByElements,
-                (AnalyticWindow) visitIfPresent(context.windowFrame()),
-                context.bracketHint() == null ? null : context.bracketHint().identifier().stream()
-                        .map(RuleContext::getText).collect(toList()), pos);
-    }
-
-    private ParseNode visitIfPresent(ParserRuleContext context) {
-        if (context != null) {
-            return visit(context);
-        } else {
-            return null;
-        }
-    }
-
-    private QualifiedName getQualifiedName(StarRocksParser.QualifiedNameContext context) {
-        List<String> parts = new ArrayList<>();
-        NodePosition pos = createPos(context);
-        for (ParseTree c : context.children) {
-            if (c instanceof TerminalNode) {
-                TerminalNode t = (TerminalNode) c;
-                if (t.getSymbol().getType() == StarRocksParser.DOT_IDENTIFIER) {
-                    parts.add(t.getText().substring(1));
-                }
-            } else if (c instanceof StarRocksParser.IdentifierContext) {
-                StarRocksParser.IdentifierContext identifierContext = (StarRocksParser.IdentifierContext) c;
-                Identifier identifier = (Identifier) visit(identifierContext);
-                parts.add(identifier.getValue());
-            }
-        }
-
-        return QualifiedName.of(parts, pos);
-    }
 }
diff --git a/fe/fe-core/src/main/java/com/starrocks/connector/parser/pinot/PinotParserUtils.java b/fe/fe-core/src/main/java/com/starrocks/connector/parser/pinot/PinotParserUtils.java
index 8febc7898270f..a5c07a248fd23 100644
--- a/fe/fe-core/src/main/java/com/starrocks/connector/parser/pinot/PinotParserUtils.java
+++ b/fe/fe-core/src/main/java/com/starrocks/connector/parser/pinot/PinotParserUtils.java
@@ -228,7 +228,7 @@ public static double getMultiplier(String outputTimeUnitStr) {
     }
 
     public static String[] parseDateFormat(String pattern) {
-        String regex = "^(.*?)( tz\\((.*?)\\))?$";
+        String regex =  "^([\\d\\- :yMdHm]{10,16})( tz\\((.*?)\\))?$";
         Pattern p = Pattern.compile(regex);
         Matcher m = p.matcher(pattern);
 
diff --git a/fe/fe-core/src/main/java/com/starrocks/sql/parser/AstBuilder.java b/fe/fe-core/src/main/java/com/starrocks/sql/parser/AstBuilder.java
index 9737b09d2be96..15d6de5e7a0c6 100644
--- a/fe/fe-core/src/main/java/com/starrocks/sql/parser/AstBuilder.java
+++ b/fe/fe-core/src/main/java/com/starrocks/sql/parser/AstBuilder.java
@@ -7205,7 +7205,7 @@ public ParseNode visitWindowFunction(StarRocksParser.WindowFunctionContext conte
         return functionCallExpr;
     }
 
-    private AnalyticExpr buildOverClause(FunctionCallExpr functionCallExpr, StarRocksParser.OverContext context,
+    protected AnalyticExpr buildOverClause(FunctionCallExpr functionCallExpr, StarRocksParser.OverContext context,
                                          NodePosition pos) {
         functionCallExpr.setIsAnalyticFnCall(true);
         List<OrderByElement> orderByElements = new ArrayList<>();
@@ -8279,7 +8279,7 @@ private TableName getTableName(StarRocksParser.QualifiedNameContext context) {
         return qualifiedNameToTableName(getQualifiedName(context));
     }
 
-    private QualifiedName getQualifiedName(StarRocksParser.QualifiedNameContext context) {
+    protected QualifiedName getQualifiedName(StarRocksParser.QualifiedNameContext context) {
         List<String> parts = new ArrayList<>();
         NodePosition pos = createPos(context);
         for (ParseTree c : context.children) {