IN PROGRESS - issue DRUID-81: SQLExpr的派生类实现Equals和HashCode方法

http://code.alibabatech.com/jira/browse/DRUID-81

src/main/java/com/alibaba/druid/sql/ast/expr/SQLAggregateExpr.java

@@ -81,4 +81,46 @@ public class SQLAggregateExpr extends SQLExprImpl implements Serializable {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((arguments == null) ? 0 : arguments.hashCode());
+        result = prime * result + ((methodName == null) ? 0 : methodName.hashCode());
+        result = prime * result + option;
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLAggregateExpr other = (SQLAggregateExpr) obj;
+        if (arguments == null) {
+            if (other.arguments != null) {
+                return false;
+            }
+        } else if (!arguments.equals(other.arguments)) {
+            return false;
+        }
+        if (methodName == null) {
+            if (other.methodName != null) {
+                return false;
+            }
+        } else if (!methodName.equals(other.methodName)) {
+            return false;
+        }
+        if (option != other.option) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLAllColumnExpr.java

@@ -21,7 +21,7 @@ import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 public class SQLAllColumnExpr extends SQLExprImpl {
 
     private static final long serialVersionUID = 1L;
-
+    
     public SQLAllColumnExpr(){
 
     }
@@ -34,4 +34,12 @@ public class SQLAllColumnExpr extends SQLExprImpl {
         visitor.visit(this);
         visitor.endVisit(this);
     }
+    
+    public int hashCode() {
+        return 0;
+    }
+    
+    public boolean equals(Object o) {
+        return o instanceof SQLAllColumnExpr;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLAllExpr.java

@@ -53,4 +53,35 @@ public class SQLAllExpr extends SQLExprImpl {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((subQuery == null) ? 0 : subQuery.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLAllExpr other = (SQLAllExpr) obj;
+        if (subQuery == null) {
+            if (other.subQuery != null) {
+                return false;
+            }
+        } else if (!subQuery.equals(other.subQuery)) {
+            return false;
+        }
+        return true;
+    }
+    
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLAnyExpr.java

@@ -53,4 +53,34 @@ public class SQLAnyExpr extends SQLExprImpl {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((subQuery == null) ? 0 : subQuery.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLAnyExpr other = (SQLAnyExpr) obj;
+        if (subQuery == null) {
+            if (other.subQuery != null) {
+                return false;
+            }
+        } else if (!subQuery.equals(other.subQuery)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLBetweenExpr.java

@@ -99,4 +99,54 @@ public class SQLBetweenExpr extends SQLExprImpl implements Serializable {
     public void setEndExpr(SQLExpr endExpr) {
         this.endExpr = endExpr;
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((beginExpr == null) ? 0 : beginExpr.hashCode());
+        result = prime * result + ((endExpr == null) ? 0 : endExpr.hashCode());
+        result = prime * result + (not ? 1231 : 1237);
+        result = prime * result + ((testExpr == null) ? 0 : testExpr.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLBetweenExpr other = (SQLBetweenExpr) obj;
+        if (beginExpr == null) {
+            if (other.beginExpr != null) {
+                return false;
+            }
+        } else if (!beginExpr.equals(other.beginExpr)) {
+            return false;
+        }
+        if (endExpr == null) {
+            if (other.endExpr != null) {
+                return false;
+            }
+        } else if (!endExpr.equals(other.endExpr)) {
+            return false;
+        }
+        if (not != other.not) {
+            return false;
+        }
+        if (testExpr == null) {
+            if (other.testExpr != null) {
+                return false;
+            }
+        } else if (!testExpr.equals(other.testExpr)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLBitStringLiteralExpr.java

@@ -60,4 +60,34 @@ public class SQLBitStringLiteralExpr extends SQLLiteralExpr {
         }
         buf.append("'");
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((value == null) ? 0 : value.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLBitStringLiteralExpr other = (SQLBitStringLiteralExpr) obj;
+        if (value == null) {
+            if (other.value != null) {
+                return false;
+            }
+        } else if (!value.equals(other.value)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLCaseExpr.java

@@ -134,4 +134,52 @@ public class SQLCaseExpr extends SQLExprImpl implements Serializable {
             visitor.endVisit(this);
         }
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((elseExpr == null) ? 0 : elseExpr.hashCode());
+        result = prime * result + ((items == null) ? 0 : items.hashCode());
+        result = prime * result + ((valueExpr == null) ? 0 : valueExpr.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLCaseExpr other = (SQLCaseExpr) obj;
+        if (elseExpr == null) {
+            if (other.elseExpr != null) {
+                return false;
+            }
+        } else if (!elseExpr.equals(other.elseExpr)) {
+            return false;
+        }
+        if (items == null) {
+            if (other.items != null) {
+                return false;
+            }
+        } else if (!items.equals(other.items)) {
+            return false;
+        }
+        if (valueExpr == null) {
+            if (other.valueExpr != null) {
+                return false;
+            }
+        } else if (!valueExpr.equals(other.valueExpr)) {
+            return false;
+        }
+        return true;
+    }
+    
+    
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLCastExpr.java

@@ -62,4 +62,43 @@ public class SQLCastExpr extends SQLExprImpl {
         }
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((dataType == null) ? 0 : dataType.hashCode());
+        result = prime * result + ((expr == null) ? 0 : expr.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLCastExpr other = (SQLCastExpr) obj;
+        if (dataType == null) {
+            if (other.dataType != null) {
+                return false;
+            }
+        } else if (!dataType.equals(other.dataType)) {
+            return false;
+        }
+        if (expr == null) {
+            if (other.expr != null) {
+                return false;
+            }
+        } else if (!expr.equals(other.expr)) {
+            return false;
+        }
+        return true;
+    }
+    
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLCurrentOfCursorExpr.java

@@ -51,4 +51,34 @@ public class SQLCurrentOfCursorExpr extends SQLExprImpl {
         visitor.endVisit(this);
     }
 
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((cursorName == null) ? 0 : cursorName.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLCurrentOfCursorExpr other = (SQLCurrentOfCursorExpr) obj;
+        if (cursorName == null) {
+            if (other.cursorName != null) {
+                return false;
+            }
+        } else if (!cursorName.equals(other.cursorName)) {
+            return false;
+        }
+        return true;
+    }
+
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLDateLiteralExpr.java

@@ -48,4 +48,34 @@ public class SQLDateLiteralExpr extends SQLLiteralExpr {
         visitor.endVisit(this);
     }
 
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((value == null) ? 0 : value.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLDateLiteralExpr other = (SQLDateLiteralExpr) obj;
+        if (value == null) {
+            if (other.value != null) {
+                return false;
+            }
+        } else if (!value.equals(other.value)) {
+            return false;
+        }
+        return true;
+    }
+
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLExistsExpr.java

@@ -74,4 +74,38 @@ public class SQLExistsExpr extends SQLExprImpl implements Serializable {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + (not ? 1231 : 1237);
+        result = prime * result + ((subQuery == null) ? 0 : subQuery.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLExistsExpr other = (SQLExistsExpr) obj;
+        if (not != other.not) {
+            return false;
+        }
+        if (subQuery == null) {
+            if (other.subQuery != null) {
+                return false;
+            }
+        } else if (!subQuery.equals(other.subQuery)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLHexExpr.java

@@ -46,4 +46,34 @@ public class SQLHexExpr extends SQLLiteralExpr {
         visitor.visit(this);
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((hex == null) ? 0 : hex.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLHexExpr other = (SQLHexExpr) obj;
+        if (hex == null) {
+            if (other.hex != null) {
+                return false;
+            }
+        } else if (!hex.equals(other.hex)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLHexStringLiteralExpr.java

@@ -47,4 +47,34 @@ public class SQLHexStringLiteralExpr extends SQLLiteralExpr {
         buf.append(value);
         buf.append("'");
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((value == null) ? 0 : value.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLHexStringLiteralExpr other = (SQLHexStringLiteralExpr) obj;
+        if (value == null) {
+            if (other.value != null) {
+                return false;
+            }
+        } else if (!value.equals(other.value)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLInListExpr.java

@@ -96,4 +96,46 @@ public class SQLInListExpr extends SQLExprImpl implements Serializable {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((expr == null) ? 0 : expr.hashCode());
+        result = prime * result + (not ? 1231 : 1237);
+        result = prime * result + ((targetList == null) ? 0 : targetList.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLInListExpr other = (SQLInListExpr) obj;
+        if (expr == null) {
+            if (other.expr != null) {
+                return false;
+            }
+        } else if (!expr.equals(other.expr)) {
+            return false;
+        }
+        if (not != other.not) {
+            return false;
+        }
+        if (targetList == null) {
+            if (other.targetList != null) {
+                return false;
+            }
+        } else if (!targetList.equals(other.targetList)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLInSubQueryExpr.java

@@ -76,4 +76,46 @@ public class SQLInSubQueryExpr extends SQLExprImpl implements Serializable {
         visitor.endVisit(this);
     }
 
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((expr == null) ? 0 : expr.hashCode());
+        result = prime * result + (not ? 1231 : 1237);
+        result = prime * result + ((subQuery == null) ? 0 : subQuery.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLInSubQueryExpr other = (SQLInSubQueryExpr) obj;
+        if (expr == null) {
+            if (other.expr != null) {
+                return false;
+            }
+        } else if (!expr.equals(other.expr)) {
+            return false;
+        }
+        if (not != other.not) {
+            return false;
+        }
+        if (subQuery == null) {
+            if (other.subQuery != null) {
+                return false;
+            }
+        } else if (!subQuery.equals(other.subQuery)) {
+            return false;
+        }
+        return true;
+    }
+
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLIntegerExpr.java

@@ -49,4 +49,34 @@ public class SQLIntegerExpr extends SQLNumericLiteralExpr {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((number == null) ? 0 : number.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLIntegerExpr other = (SQLIntegerExpr) obj;
+        if (number == null) {
+            if (other.number != null) {
+                return false;
+            }
+        } else if (!number.equals(other.number)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLIntervalLiteralExpr.java

@@ -56,4 +56,34 @@ public class SQLIntervalLiteralExpr extends SQLLiteralExpr {
         visitor.endVisit(this);
     }
 
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((sign == null) ? 0 : sign.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLIntervalLiteralExpr other = (SQLIntervalLiteralExpr) obj;
+        if (sign == null) {
+            if (other.sign != null) {
+                return false;
+            }
+        } else if (!sign.equals(other.sign)) {
+            return false;
+        }
+        return true;
+    }
+
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLListExpr.java

@@ -24,4 +24,35 @@ public class SQLListExpr extends SQLExprImpl {
         }
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((items == null) ? 0 : items.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLListExpr other = (SQLListExpr) obj;
+        if (items == null) {
+            if (other.items != null) {
+                return false;
+            }
+        } else if (!items.equals(other.items)) {
+            return false;
+        }
+        return true;
+    }
+    
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLMethodInvokeExpr.java

@@ -101,4 +101,50 @@ public class SQLMethodInvokeExpr extends SQLExprImpl implements Serializable {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((methodName == null) ? 0 : methodName.hashCode());
+        result = prime * result + ((owner == null) ? 0 : owner.hashCode());
+        result = prime * result + ((parameters == null) ? 0 : parameters.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLMethodInvokeExpr other = (SQLMethodInvokeExpr) obj;
+        if (methodName == null) {
+            if (other.methodName != null) {
+                return false;
+            }
+        } else if (!methodName.equals(other.methodName)) {
+            return false;
+        }
+        if (owner == null) {
+            if (other.owner != null) {
+                return false;
+            }
+        } else if (!owner.equals(other.owner)) {
+            return false;
+        }
+        if (parameters == null) {
+            if (other.parameters != null) {
+                return false;
+            }
+        } else if (!parameters.equals(other.parameters)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLNotExpr.java

@@ -56,4 +56,34 @@ public class SQLNotExpr extends SQLExprImpl implements Serializable {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((expr == null) ? 0 : expr.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLNotExpr other = (SQLNotExpr) obj;
+        if (expr == null) {
+            if (other.expr != null) {
+                return false;
+            }
+        } else if (!expr.equals(other.expr)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLNullExpr.java

@@ -34,4 +34,12 @@ public class SQLNullExpr extends SQLLiteralExpr {
 
         visitor.endVisit(this);
     }
+    
+    public int hashCode() {
+        return 0;
+    }
+    
+    public boolean equals(Object o) {
+        return o instanceof SQLNullExpr;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLNumberExpr.java

@@ -48,4 +48,34 @@ public class SQLNumberExpr extends SQLNumericLiteralExpr {
         visitor.visit(this);
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((number == null) ? 0 : number.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLNumberExpr other = (SQLNumberExpr) obj;
+        if (number == null) {
+            if (other.number != null) {
+                return false;
+            }
+        } else if (!number.equals(other.number)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLObjectCreateExpr.java

@@ -51,4 +51,42 @@ public class SQLObjectCreateExpr extends SQLExprImpl implements Serializable {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((objType == null) ? 0 : objType.hashCode());
+        result = prime * result + ((paramList == null) ? 0 : paramList.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLObjectCreateExpr other = (SQLObjectCreateExpr) obj;
+        if (objType == null) {
+            if (other.objType != null) {
+                return false;
+            }
+        } else if (!objType.equals(other.objType)) {
+            return false;
+        }
+        if (paramList == null) {
+            if (other.paramList != null) {
+                return false;
+            }
+        } else if (!paramList.equals(other.paramList)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLQueryExpr.java

@@ -55,4 +55,34 @@ public class SQLQueryExpr extends SQLExprImpl implements Serializable {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((subQuery == null) ? 0 : subQuery.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLQueryExpr other = (SQLQueryExpr) obj;
+        if (subQuery == null) {
+            if (other.subQuery != null) {
+                return false;
+            }
+        } else if (!subQuery.equals(other.subQuery)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLSomeExpr.java

@@ -53,4 +53,34 @@ public class SQLSomeExpr extends SQLExprImpl {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((subQuery == null) ? 0 : subQuery.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLSomeExpr other = (SQLSomeExpr) obj;
+        if (subQuery == null) {
+            if (other.subQuery != null) {
+                return false;
+            }
+        } else if (!subQuery.equals(other.subQuery)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLTextLiteralExpr.java

@@ -37,4 +37,34 @@ public abstract class SQLTextLiteralExpr extends SQLLiteralExpr {
     public void setText(String text) {
         this.text = text;
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((text == null) ? 0 : text.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLTextLiteralExpr other = (SQLTextLiteralExpr) obj;
+        if (text == null) {
+            if (other.text != null) {
+                return false;
+            }
+        } else if (!text.equals(other.text)) {
+            return false;
+        }
+        return true;
+    }
 }

src/main/java/com/alibaba/druid/sql/ast/expr/SQLUnaryExpr.java

@@ -65,4 +65,38 @@ public class SQLUnaryExpr extends SQLExprImpl implements Serializable {
 
         visitor.endVisit(this);
     }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((expr == null) ? 0 : expr.hashCode());
+        result = prime * result + ((operator == null) ? 0 : operator.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        SQLUnaryExpr other = (SQLUnaryExpr) obj;
+        if (expr == null) {
+            if (other.expr != null) {
+                return false;
+            }
+        } else if (!expr.equals(other.expr)) {
+            return false;
+        }
+        if (operator != other.operator) {
+            return false;
+        }
+        return true;
+    }
 }