improved postgresql sql parser support. support Date Expressions. issue #1391

src/test/java/com/alibaba/druid/bvt/sql/EqualTest_OracleDate.java

@@ -4,13 +4,13 @@ import junit.framework.TestCase;
 
 import org.junit.Assert;
 
-import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleDateExpr;
+import com.alibaba.druid.sql.ast.expr.SQLDateExpr;
 
 public class EqualTest_OracleDate extends TestCase {
 
     public void test_eq() throws Exception {
-        OracleDateExpr exprA = new OracleDateExpr();
-        OracleDateExpr exprB = new OracleDateExpr();
+        SQLDateExpr exprA = new SQLDateExpr();
+        SQLDateExpr exprB = new SQLDateExpr();
         Assert.assertEquals(exprA.hashCode(), exprB.hashCode());
         Assert.assertEquals(exprA, exprB);
     }

src/test/java/com/alibaba/druid/bvt/sql/oracle/visitor/OracleASTVisitorAdapterTest.java

@@ -34,7 +34,7 @@ import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleArgumentExpr;
 import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleBinaryDoubleExpr;
 import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleBinaryFloatExpr;
 import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleCursorExpr;
-import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleDateExpr;
+import com.alibaba.druid.sql.ast.expr.SQLDateExpr;
 import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleDatetimeExpr;
 import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleDbLinkExpr;
 import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleExtractExpr;
@@ -100,7 +100,7 @@ public class OracleASTVisitorAdapterTest extends TestCase {
         new OraclePLSQLCommitStatement().accept(adapter);
         new OracleAnalytic().accept(adapter);
         new OracleAnalyticWindowing().accept(adapter);
-        new OracleDateExpr().accept(adapter);
+        new SQLDateExpr().accept(adapter);
         new OracleDbLinkExpr().accept(adapter);
         new OracleExtractExpr().accept(adapter);
         new OracleSelectForUpdate().accept(adapter);

src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGSelectTest37.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 1999-2101 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.postgresql;
+
+import com.alibaba.druid.sql.PGTest;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.postgresql.parser.PGSQLStatementParser;
+import com.alibaba.druid.sql.dialect.postgresql.visitor.PGSchemaStatVisitor;
+import org.junit.Assert;
+
+import java.util.List;
+
+public class PGSelectTest37 extends PGTest {
+
+    public void test_0() throws Exception {
+        String sql = "select date '2001-09-28'";
+
+        PGSQLStatementParser parser = new PGSQLStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+
+        Assert.assertEquals("SELECT DATE '2001-09-28'", SQLUtils.toPGString(stmt));
+        
+        Assert.assertEquals("select date '2001-09-28'", SQLUtils.toPGString(stmt, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
+
+        Assert.assertEquals(1, statementList.size());
+
+        PGSchemaStatVisitor visitor = new PGSchemaStatVisitor();
+        stmt.accept(visitor);
+
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+
+        Assert.assertEquals(0, visitor.getColumns().size());
+        Assert.assertEquals(0, visitor.getTables().size());
+    }
+}