improved postgresql support, fix #3588

src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGExprParser.java

@@ -282,10 +282,25 @@ public class PGExprParser extends SQLExprParser {
                 
                 return primaryRest(extract);
             } else if (FnvHash.Constants.POINT == hash) {
-                SQLExpr value = this.primary();
-                PGPointExpr point = new PGPointExpr();
-                point.setValue(value);
-                return primaryRest(point);
+                switch (lexer.token()) {
+                    case DOT:
+                    case EQ:
+                    case LTGT:
+                    case GT:
+                    case GTEQ:
+                    case LT:
+                    case LTEQ:
+                    case SUB:
+                    case PLUS:
+                    case SUBGT:
+                        lexer.nextToken();
+                        return primaryRest(identifierExpr);
+                    default:
+                        SQLExpr value = this.primary();
+                        PGPointExpr point = new PGPointExpr();
+                        point.setValue(value);
+                        return primaryRest(point);
+                }
             } else if (FnvHash.Constants.BOX == hash) {
                 SQLExpr value = this.primary();
                 PGBoxExpr box = new PGBoxExpr();

src/test/java/com/alibaba/druid/bvt/sql/postgresql/select/PGSelectTest86.java

@@ -0,0 +1,28 @@
+package com.alibaba.druid.bvt.sql.postgresql.select;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+import java.util.List;
+
+public class PGSelectTest86
+        extends TestCase {
+    public void test_0() throws Exception {
+        String sql =  "select * from xxx_point point inner join xxx_cc cc on point.id = cc.point_id";
+
+        final List<SQLStatement> statements = SQLUtils.parseStatements(sql, JdbcConstants.POSTGRESQL);
+        assertEquals(1, statements.size());
+        final SQLStatement stmt = statements.get(0);
+
+        assertEquals("SELECT *\n" +
+                        "FROM xxx_point point\n" +
+                        "\tINNER JOIN xxx_cc cc ON POINT id = cc.point_id"
+                , stmt.toString());
+
+        assertEquals("select *\n" +
+                "from xxx_point point\n" +
+                "\tinner join xxx_cc cc on point id = cc.point_id", stmt.toLowerCaseString());
+    }
+}