new feature : sql builder

src/main/java/com/alibaba/druid/sql/builder/SQLSelectBuilder.java

@@ -0,0 +1,36 @@
+package com.alibaba.druid.sql.builder;
+
+import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
+
+public interface SQLSelectBuilder {
+
+    SQLSelectStatement getSQLSelectStatement();
+
+    SQLSelectBuilder select(String... column);
+
+    SQLSelectBuilder selectWithAlias(String column, String alias);
+
+    SQLSelectBuilder from(String table);
+
+    SQLSelectBuilder from(String table, String alias);
+
+    SQLSelectBuilder orderBy(String... columns);
+
+    SQLSelectBuilder groupBy(String expr);
+
+    SQLSelectBuilder having(String expr);
+
+    SQLSelectBuilder into(String expr);
+
+    SQLSelectBuilder limit(int rowCount);
+
+    SQLSelectBuilder limit(int rowCount, int offset);
+
+    SQLSelectBuilder where(String sql);
+
+    SQLSelectBuilder whereAnd(String sql);
+
+    SQLSelectBuilder whereOr(String sql);
+
+    String toString();
+}