new feature : sql builder

src/test/java/com/alibaba/druid/bvt/sql/builder/BuilderDeleteTest.java

@@ -0,0 +1,26 @@
+package com.alibaba.druid.bvt.sql.builder;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.builder.SQLBuilderFactory;
+import com.alibaba.druid.sql.builder.SQLDeleteBuilder;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class BuilderDeleteTest extends TestCase {
+
+    public void test_0() throws Exception {
+        SQLDeleteBuilder builder = SQLBuilderFactory.createDeleteBuilder(JdbcConstants.MYSQL);
+
+        builder //
+        .from("mytable") //
+        .whereAnd("f1 > 0") //
+        ;
+
+        String sql = builder.toString();
+        System.out.println(sql);
+        Assert.assertEquals("DELETE FROM mytable" //
+                            + "\nWHERE f1 > 0", sql);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/builder/BuilderSelectTest.java

@@ -0,0 +1,32 @@
+package com.alibaba.druid.bvt.sql.builder;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.builder.SQLBuilderFactory;
+import com.alibaba.druid.sql.builder.SQLSelectBuilder;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class BuilderSelectTest extends TestCase {
+
+    public void test_0() throws Exception {
+        SQLSelectBuilder builder = SQLBuilderFactory.createSelectSQLBuilder(JdbcConstants.MYSQL);
+
+        builder.from("mytable");
+        builder.select("f1", "f2", "f3 F3", "count(*) cnt");
+        builder.groupBy("f1");
+        builder.having("count(*) > 1");
+        builder.orderBy("f1", "f2 desc");
+        builder.whereAnd("f1 > 0");
+
+        String sql = builder.toString();
+        System.out.println(sql);
+        Assert.assertEquals("SELECT f1, f2, f3 AS F3, COUNT(*) AS cnt" //
+                            + "\nFROM mytable"//
+                            + "\nWHERE f1 > 0"//
+                            + "\nGROUP BY f1"//
+                            + "\nHAVING COUNT(*) > 1"//
+                            + "\nORDER BY f1, f2 DESC", sql);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/builder/BuilderUpdateTest.java

@@ -0,0 +1,27 @@
+package com.alibaba.druid.bvt.sql.builder;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.builder.SQLBuilderFactory;
+import com.alibaba.druid.sql.builder.SQLUpdateBuilder;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class BuilderUpdateTest extends TestCase {
+
+    public void test_0() throws Exception {
+        SQLUpdateBuilder builder = SQLBuilderFactory.createUpdateBuilder(JdbcConstants.MYSQL);
+
+        builder //
+        .from("mytable") //
+        .whereAnd("f1 > 0") //
+        .set("f1 = f1 + 1", "f2 = ?");
+
+        String sql = builder.toString();
+        System.out.println(sql);
+        Assert.assertEquals("UPDATE mytable" //
+                            + "\nSET f1 = f1 + 1, f2 = ?" //
+                            + "\nWHERE f1 > 0", sql);
+    }
+}