Revert "Revert "INTERVAL 语法支持""

2023-03-04 19:17:16 +00:00 · 2014-12-31 13:27:08 +08:00
parent 64755ac375
commit ac8bb22277
7 changed files with 146 additions and 68 deletions
@@ -0,0 +1,37 @@
+package com.alibaba.druid.sql.parser;
+
+import com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGSelectStatement;
+import com.alibaba.druid.sql.dialect.postgresql.parser.PGSQLStatementParser;
+import junit.framework.TestCase;
+import org.junit.Assert;
+
+/**
+ * Created by tianzhen.wtz on 2014/12/26 0026 20:44.
+ * 类说明：
+ */
+public class PGIntervalSQLTest extends TestCase{
+
+
+    public void testIntervalSQL(){
+        String sql1="select timestamp '2001-09-28 01:00' + interval '23 hours'";
+        String sql1Result="SELECT TIMESTAMP '2001-09-28 01:00' + INTERVAL '23 hours'";
+        equal(sql1,sql1Result);
+
+        String sql2="select interval '1 day' - interval '1 hour'";
+        String sql2Result="SELECT INTERVAL '1 day' - INTERVAL '1 hour'";
+        equal(sql2,sql2Result);
+
+        String sql3="select date_part('month', interval '2 years 3 months')";
+        String sql3Result="SELECT date_part('month', INTERVAL '2 years 3 months')";
+        equal(sql3,sql3Result);
+    }
+
+
+    private void equal(String targetSql,String resultSql){
+        PGSQLStatementParser parser=new PGSQLStatementParser(targetSql);
+        PGSelectStatement statement = parser.parseSelect();
+        Assert.assertTrue(statement.toString().equals(resultSql));
+
+    }
+
+}