improve SQLEvalVisitor

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalMethodAsciiTest.java

@@ -0,0 +1,14 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalMethodAsciiTest extends TestCase {
+    public void test_ascii() throws Exception {
+        Assert.assertEquals(50, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "ascii('2')"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalMethodInstrTest.java

@@ -0,0 +1,15 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalMethodInstrTest extends TestCase {
+    public void test_length() throws Exception {
+        Assert.assertEquals(4, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "instr('foobarbar', 'bar')"));
+        Assert.assertEquals(0, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "instr('xbar', 'foobar')"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalMethodLeftTest.java

@@ -0,0 +1,14 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalMethodLeftTest extends TestCase {
+    public void test_ascii() throws Exception {
+        Assert.assertEquals("fooba", SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "LEFT('foobarbar', 5)"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalMethodLengthTest.java

@@ -0,0 +1,14 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalMethodLengthTest extends TestCase {
+    public void test_length() throws Exception {
+        Assert.assertEquals(4, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "length('text')"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalMethodReverseTest.java

@@ -0,0 +1,14 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalMethodReverseTest extends TestCase {
+    public void test_reverse() throws Exception {
+        Assert.assertEquals("cba", SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "REVERSE('abc')"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalMethodRightTest.java

@@ -0,0 +1,14 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalMethodRightTest extends TestCase {
+    public void test_ascii() throws Exception {
+        Assert.assertEquals("rbar", SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "right('foobarbar', 4)"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalMethodTrimTest.java

@@ -0,0 +1,14 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalMethodTrimTest extends TestCase {
+    public void test_trim() throws Exception {
+        Assert.assertEquals("bar", SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "TRIM('  bar   ')"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalRlikeTest.java

@@ -0,0 +1,22 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalRlikeTest extends TestCase {
+    public void test_rlike() throws Exception {
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "'a' REGEXP '^[a-d]'"));
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "'a' RLIKE '^[a-d]'"));
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "'1' RLIKE '^[a-d]'"));
+    }
+    
+    public void test_not_rlike() throws Exception {
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "'a' NOT REGEXP '^[a-d]'"));
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "'a' NOT RLIKE '^[a-d]'"));
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "'1' NOT RLIKE '^[a-d]'"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalSelectTest.java

@@ -0,0 +1,14 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalSelectTest extends TestCase {
+    public void test_select() throws Exception {
+        Assert.assertEquals(1, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "SELECT 1"));
+    }
+}