增加的postgresql对应的dialect类

Author: Zhang Xian

data-providers/src/main/java/datart/data/provider/calcite/dialect/PostgresqlSqlDialectSupport.java

@@ -0,0 +1,12 @@
+package datart.data.provider.calcite.dialect;
+
+import org.apache.calcite.sql.dialect.PostgresqlSqlDialect;
+
+public class PostgresqlSqlDialectSupport extends PostgresqlSqlDialect implements FetchAndOffsetSupport{
+
+    public PostgresqlSqlDialectSupport() {
+        this(DEFAULT_CONTEXT);
+    }
+    private PostgresqlSqlDialectSupport(Context context) { super(context); }
+
+}