SchemaStatVisitor support cast expr

src/test/java/com/alibaba/druid/bvt/sql/schemaStat/SchemaStatTest7.java

@@ -0,0 +1,32 @@
+package com.alibaba.druid.bvt.sql.schemaStat;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.parser.SQLParserUtils;
+import com.alibaba.druid.sql.parser.SQLStatementParser;
+import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
+import com.alibaba.druid.util.JdbcConstants;
+
+import junit.framework.TestCase;
+
+public class SchemaStatTest7 extends TestCase {
+
+    public void test_schemaStat() throws Exception {
+        String sql = "select t.a,t.b from t where cast(t.statdate as decimal) >=20160626";
+
+        String dbType = JdbcConstants.MYSQL;
+        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
+        SQLStatement stmt = parser.parseStatementList().get(0);
+
+        SchemaStatVisitor statVisitor = SQLUtils.createSchemaStatVisitor(dbType);
+        stmt.accept(statVisitor);
+
+//        System.out.println(statVisitor.getColumns());
+//        System.out.println(statVisitor.getGroupByColumns()); // group by
+
+        Assert.assertEquals(3, statVisitor.getColumns().size());
+        Assert.assertEquals(1, statVisitor.getConditions().size());
+    }
+}