diff --git a/nop-commons/src/main/java/io/nop/commons/type/StdSqlType.java b/nop-commons/src/main/java/io/nop/commons/type/StdSqlType.java
index 6358999d2..c868b0c25 100644
--- a/nop-commons/src/main/java/io/nop/commons/type/StdSqlType.java
+++ b/nop-commons/src/main/java/io/nop/commons/type/StdSqlType.java
@@ -188,4 +188,11 @@ public static StdSqlType fromStdName(String stdName) {
     public static StdSqlType fromStdDataTYpe(StdDataType dataType) {
         return stdTypeMap.get(dataType);
     }
+
+    public static StdSqlType fromJavaClass(Class<?> clazz) {
+        StdDataType dataType = StdDataType.fromJavaClass(clazz);
+        if (dataType == null)
+            return null;
+        return StdSqlType.fromStdDataTYpe(dataType);
+    }
 }
\ No newline at end of file
diff --git a/nop-commons/src/main/java/io/nop/commons/util/MathHelper.java b/nop-commons/src/main/java/io/nop/commons/util/MathHelper.java
index becdb7382..f14070748 100644
--- a/nop-commons/src/main/java/io/nop/commons/util/MathHelper.java
+++ b/nop-commons/src/main/java/io/nop/commons/util/MathHelper.java
@@ -49,6 +49,7 @@
 import java.util.IdentityHashMap;
 import java.util.List;
 import java.util.Objects;
+import java.util.concurrent.atomic.AtomicLong;
 
 import static io.nop.api.core.convert.ConvertHelper.toBigDecimal;
 import static io.nop.api.core.convert.ConvertHelper.toBigInteger;
@@ -168,6 +169,12 @@ public static Number getPrimitiveDefaultValue(Class<?> forClass) {
 
     private static IRandom s_randomImpl = DefaultThreadLocalRandom.INSTANCE;
 
+    private static AtomicLong s_seq = new AtomicLong();
+
+    public static long nextSeq() {
+        return s_seq.incrementAndGet();
+    }
+
     /**
      * 缺省返回ThreadLocalRandom
      */
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlBitValueLiteral.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlBitValueLiteral.java
index 8440b59e5..27f638604 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlBitValueLiteral.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlBitValueLiteral.java
@@ -7,8 +7,12 @@
  */
 package io.nop.orm.eql.ast;
 
+import io.nop.commons.type.StdSqlType;
 import io.nop.orm.eql.ast._gen._SqlBitValueLiteral;
 
 public class SqlBitValueLiteral extends _SqlBitValueLiteral {
-
+    @Override
+    public StdSqlType getSqlType() {
+        return StdSqlType.TINYINT;
+    }
 }
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlBooleanLiteral.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlBooleanLiteral.java
index 7c91830f3..a73ede920 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlBooleanLiteral.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlBooleanLiteral.java
@@ -7,8 +7,12 @@
  */
 package io.nop.orm.eql.ast;
 
+import io.nop.commons.type.StdSqlType;
 import io.nop.orm.eql.ast._gen._SqlBooleanLiteral;
 
 public class SqlBooleanLiteral extends _SqlBooleanLiteral {
-
+    @Override
+    public StdSqlType getSqlType() {
+        return StdSqlType.BOOLEAN;
+    }
 }
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlDateTimeLiteral.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlDateTimeLiteral.java
index d422751b5..ba6aafa66 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlDateTimeLiteral.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlDateTimeLiteral.java
@@ -7,8 +7,12 @@
  */
 package io.nop.orm.eql.ast;
 
+import io.nop.commons.type.StdSqlType;
 import io.nop.orm.eql.ast._gen._SqlDateTimeLiteral;
 
 public class SqlDateTimeLiteral extends _SqlDateTimeLiteral {
-
+    @Override
+    public StdSqlType getSqlType() {
+        return StdSqlType.DATETIME;
+    }
 }
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlHexadecimalLiteral.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlHexadecimalLiteral.java
index 64bcdedf0..466012c9a 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlHexadecimalLiteral.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlHexadecimalLiteral.java
@@ -7,8 +7,12 @@
  */
 package io.nop.orm.eql.ast;
 
+import io.nop.commons.type.StdSqlType;
 import io.nop.orm.eql.ast._gen._SqlHexadecimalLiteral;
 
 public class SqlHexadecimalLiteral extends _SqlHexadecimalLiteral {
-
+    @Override
+    public StdSqlType getSqlType() {
+        return StdSqlType.BIGINT;
+    }
 }
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlLiteral.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlLiteral.java
index 3fbc7d29c..dcfe60e14 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlLiteral.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlLiteral.java
@@ -7,7 +7,9 @@
  */
 package io.nop.orm.eql.ast;
 
+import io.nop.commons.type.StdSqlType;
 import io.nop.orm.eql.ast._gen._SqlLiteral;
 
 public abstract class SqlLiteral extends _SqlLiteral {
+    public abstract StdSqlType getSqlType();
 }
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlNullLiteral.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlNullLiteral.java
index aefab3824..c48befc6f 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlNullLiteral.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlNullLiteral.java
@@ -7,8 +7,12 @@
  */
 package io.nop.orm.eql.ast;
 
+import io.nop.commons.type.StdSqlType;
 import io.nop.orm.eql.ast._gen._SqlNullLiteral;
 
 public class SqlNullLiteral extends _SqlNullLiteral {
-
+    @Override
+    public StdSqlType getSqlType() {
+        return StdSqlType.ANY;
+    }
 }
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlNumberLiteral.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlNumberLiteral.java
index bc6927206..317b4cb75 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlNumberLiteral.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlNumberLiteral.java
@@ -7,6 +7,7 @@
  */
 package io.nop.orm.eql.ast;
 
+import io.nop.commons.type.StdSqlType;
 import io.nop.commons.util.StringHelper;
 import io.nop.orm.eql.ast._gen._SqlNumberLiteral;
 
@@ -15,4 +16,11 @@ public class SqlNumberLiteral extends _SqlNumberLiteral {
     public Number getNumberValue() {
         return StringHelper.parseNumber(getValue());
     }
+
+    @Override
+    public StdSqlType getSqlType() {
+        Number num = getNumberValue();
+        StdSqlType sqlType = StdSqlType.fromJavaClass(num.getClass());
+        return sqlType == null ? StdSqlType.DECIMAL : sqlType;
+    }
 }
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlStringLiteral.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlStringLiteral.java
index 12687d568..fd0466e98 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlStringLiteral.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/ast/SqlStringLiteral.java
@@ -8,6 +8,7 @@
 package io.nop.orm.eql.ast;
 
 import io.nop.api.core.exceptions.NopException;
+import io.nop.commons.type.StdSqlType;
 import io.nop.orm.eql.ast._gen._SqlStringLiteral;
 
 import static io.nop.core.CoreErrors.ARG_AST_NODE;
@@ -20,4 +21,9 @@ protected void checkMandatory(String propName, Object value) {
             throw new NopException(ERR_LANG_AST_NODE_PROP_NOT_ALLOW_EMPTY).loc(getLocation())
                     .param(ARG_AST_NODE, getASTType()).param(ARG_PROP_NAME, propName);
     }
+
+    @Override
+    public StdSqlType getSqlType() {
+        return StdSqlType.VARCHAR;
+    }
 }
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/compile/ExprTypeResolver.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/compile/ExprTypeResolver.java
index 4c0ace586..b4f3c36cf 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/compile/ExprTypeResolver.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/compile/ExprTypeResolver.java
@@ -17,6 +17,7 @@
 import io.nop.orm.eql.ast.SqlBinaryExpr;
 import io.nop.orm.eql.ast.SqlDateTimeLiteral;
 import io.nop.orm.eql.ast.SqlExpr;
+import io.nop.orm.eql.ast.SqlLiteral;
 import io.nop.orm.eql.ast.SqlRegularFunction;
 import io.nop.orm.eql.meta.ISqlExprMeta;
 import io.nop.orm.eql.meta.SingleColumnExprMeta;
@@ -80,6 +81,10 @@ private StdSqlType resolveType(SqlExpr expr) {
                 break;
             }
         }
+        if(type == StdSqlType.OTHER){
+            if(expr instanceof SqlLiteral)
+                return ((SqlLiteral) expr).getSqlType();
+        }
         if (type == null)
             type = StdSqlType.ANY;
         return type;
diff --git a/nop-orm-eql/src/main/java/io/nop/orm/eql/compile/SqlParamTypeResolver.java b/nop-orm-eql/src/main/java/io/nop/orm/eql/compile/SqlParamTypeResolver.java
index 2349df7d9..090b46310 100644
--- a/nop-orm-eql/src/main/java/io/nop/orm/eql/compile/SqlParamTypeResolver.java
+++ b/nop-orm-eql/src/main/java/io/nop/orm/eql/compile/SqlParamTypeResolver.java
@@ -15,6 +15,7 @@
 import io.nop.orm.eql.ast.EqlASTVisitor;
 import io.nop.orm.eql.ast.SqlAssignment;
 import io.nop.orm.eql.ast.SqlBinaryExpr;
+import io.nop.orm.eql.ast.SqlExpr;
 import io.nop.orm.eql.ast.SqlParameterMarker;
 import io.nop.orm.eql.meta.ISqlExprMeta;
 import io.nop.orm.eql.meta.SingleColumnExprMeta;
@@ -64,15 +65,26 @@ public void visitSqlParameterMarker(SqlParameterMarker node) {
             case SqlBinaryExpr: {
                 SqlBinaryExpr binaryExpr = (SqlBinaryExpr) parent;
                 StdSqlType sqlType;
+                SqlExpr otherExpr;
                 if (binaryExpr.getLeft() == node) {
+                    otherExpr = binaryExpr.getRight();
                     resolvedMeta = binaryExpr.getRight().getResolvedExprMeta();
                     sqlType = binaryExpr.getOperator().getLeftSqlType();
                 } else {
+                    otherExpr = binaryExpr.getLeft();
                     resolvedMeta = binaryExpr.getLeft().getResolvedExprMeta();
                     sqlType = binaryExpr.getOperator().getRightSqlType();
                 }
+
+                // 比较算符要求相同的类型
+                if (resolvedMeta == null && binaryExpr.getOperator().isCompareOp()) {
+                    resolvedMeta = new ExprTypeResolver(dialect).resolveExprMeta(otherExpr);
+                }
+
                 if (resolvedMeta == null) {
                     IDataParameterBinder binder = dialect.getDataParameterBinder(sqlType.getStdDataType(), sqlType);
+                    if (binder == null)
+                        binder = DataParameterBinders.ANY;
                     resolvedMeta = new SingleColumnExprMeta("?", binder, ExprOrmDataType.fromSqlType(sqlType));
                 }
                 break;
diff --git a/nop-orm/src/main/java/io/nop/orm/support/OrmMappingTableMeta.java b/nop-orm/src/main/java/io/nop/orm/support/OrmMappingTableMeta.java
index f8de8c996..961a26034 100644
--- a/nop-orm/src/main/java/io/nop/orm/support/OrmMappingTableMeta.java
+++ b/nop-orm/src/main/java/io/nop/orm/support/OrmMappingTableMeta.java
@@ -1,6 +1,5 @@
 package io.nop.orm.support;
 
-import io.nop.api.core.util.Guard;
 import io.nop.commons.util.CollectionHelper;
 import io.nop.commons.util.StringHelper;
 import io.nop.orm.model.IEntityModel;
@@ -23,7 +22,7 @@ public OrmMappingTableMeta(IEntityModel mappingTable) {
         this.refProp1 = CollectionHelper.first(rels);
         this.refProp2 = CollectionHelper.last(rels);
 
-        Guard.checkArgument(rels.size() == 2, "mappingTable must contains two to-one relations");
+        // Guard.checkArgument(rels.size() == 2, "mappingTable must contains two to-one relations");
     }
 
     /**
diff --git a/nop-orm/src/test/java/io/nop/orm/impl/TestOrmTemplate.java b/nop-orm/src/test/java/io/nop/orm/impl/TestOrmTemplate.java
index 648a7e934..c95532533 100644
--- a/nop-orm/src/test/java/io/nop/orm/impl/TestOrmTemplate.java
+++ b/nop-orm/src/test/java/io/nop/orm/impl/TestOrmTemplate.java
@@ -110,6 +110,15 @@ public void testSupports() {
         }
     }
 
+    @Test
+    public void testParamValueType() {
+        txn().runInTransaction(null, TransactionPropagation.SUPPORTS, txn -> {
+            SQL sql = SQL.begin().sql("select o,2 from io.nop.app.SimsClass o where 1=? and date(o.createdTime) > ?", 3,"2002-01-03").end();
+            orm().findAll(sql);
+            return null;
+        });
+    }
+
     @Test
     public void testEntityId() {
         SimsClass entity = (SimsClass) orm().newEntity(SimsClass.class.getName());