better type habndling, shell-tableReader for preserving table structure

packages/api/src/shell/tableReader.js

@@ -0,0 +1,28 @@
+const { quoteFullName } = require('@dbgate/tools');
+const driverConnect = require('../utility/driverConnect');
+
+const engines = require('@dbgate/engines');
+
+async function queryReader({ connection, pureName, schemaName }) {
+  const driver = engines(connection);
+  const pool = await driverConnect(driver, connection);
+  console.log(`Connected.`);
+
+  const fullName = { pureName, schemaName };
+
+  const table = await driver.analyseSingleObject(pool, fullName, 'tables');
+  const query = `select * from ${quoteFullName(driver.dialect, fullName)}`;
+  if (table) {
+    console.log(`Reading table ${table}`);
+    return await driver.readQuery(pool, query, table);
+  }
+  const view = await driver.analyseSingleObject(pool, fullName, 'views');
+  if (view) {
+    console.log(`Reading view ${table}`);
+    return await driver.readQuery(pool, query, view);
+  }
+
+  return await driver.readQuery(pool, query);
+}
+
+module.exports = queryReader;