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vendor/swoole/examples/postgresql/postgresql_coro.php

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+
+<?php
+
+go(function () {
+
+    $pg = new Swoole\Coroutine\PostgreSql();
+    $conn  = $pg -> connect ("host=127.0.0.1 port=5432 dbname=test user=wuzhenyu password=");
+    $result = $pg->query($conn, 'SELECT * FROM test;');
+    $arr = $pg->fetchAll($result);// the same with affectedRows(),fetchObject(),fetchAssoc(),fetchArray(),fetchRow(),numRows()
+    var_dump($arr);
+
+});
+
+go(function () {
+
+    $pg = new Swoole\Coroutine\PostgreSql();
+    $conn  = $pg -> connect ("host=127.0.0.1 port=5432 dbname=test user=wuzhenyu password=");
+    $metaData = $pg->metaData($conn, 'test');
+    var_dump($metaData);
+
+});
+?>