From da8d80b934ea002ac39b41cbebc035f653e86e7c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=AB=98=E9=93=81?= <shaojin.wensj@alibaba-inc.com>
Date: Sat, 5 Oct 2019 08:18:31 +0800
Subject: [PATCH] backport sql parser improved from fastsql

---
 .../druid/sql/ast/SQLDataTypeRefExpr.java     | 53 +++++++++++++++++++
 .../druid/sql/ast/SQLDbTypedObject.java       |  6 +++
 2 files changed, 59 insertions(+)
 create mode 100644 src/main/java/com/alibaba/druid/sql/ast/SQLDataTypeRefExpr.java
 create mode 100644 src/main/java/com/alibaba/druid/sql/ast/SQLDbTypedObject.java

diff --git a/src/main/java/com/alibaba/druid/sql/ast/SQLDataTypeRefExpr.java b/src/main/java/com/alibaba/druid/sql/ast/SQLDataTypeRefExpr.java
new file mode 100644
index 0000000000..2201e8a2f2
--- /dev/null
+++ b/src/main/java/com/alibaba/druid/sql/ast/SQLDataTypeRefExpr.java
@@ -0,0 +1,53 @@
+package com.alibaba.druid.sql.ast;
+
+import com.alibaba.druid.sql.visitor.SQLASTVisitor;
+
+public class SQLDataTypeRefExpr extends SQLExprImpl {
+    private SQLDataType dataType;
+
+    public SQLDataTypeRefExpr(SQLDataType dataType) {
+        this.dataType = dataType;
+    }
+
+    public SQLDataType getDataType() {
+        return dataType;
+    }
+
+    public void setDataType(SQLDataType x) {
+        if (x != null) {
+            x.setParent(this);
+        }
+        this.dataType = x;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        SQLDataTypeRefExpr that = (SQLDataTypeRefExpr) o;
+
+        return dataType != null ? dataType.equals(that.dataType) : that.dataType == null;
+    }
+
+    @Override
+    public int hashCode() {
+        return dataType != null ? dataType.hashCode() : 0;
+    }
+
+    @Override
+    protected void accept0(SQLASTVisitor v) {
+        if (v.visit(this)) {
+            acceptChild(v, dataType);
+        }
+        v.endVisit(this);
+    }
+
+    @Override
+    public SQLExpr clone() {
+        return new SQLDataTypeRefExpr(
+                dataType == null
+                        ? null
+                        : dataType.clone());
+    }
+}
diff --git a/src/main/java/com/alibaba/druid/sql/ast/SQLDbTypedObject.java b/src/main/java/com/alibaba/druid/sql/ast/SQLDbTypedObject.java
new file mode 100644
index 0000000000..3625a7b396
--- /dev/null
+++ b/src/main/java/com/alibaba/druid/sql/ast/SQLDbTypedObject.java
@@ -0,0 +1,6 @@
+package com.alibaba.druid.sql.ast;
+
+public interface SQLDbTypedObject extends SQLObject {
+    String getDbType();
+}
+