feat: init

twake/backend/node/src/cli/utils/copy-table/index.js

@@ -0,0 +1,88 @@
+/* eslint-disable */
+var cassandra = require("cassandra-driver");
+
+var authProvider = new cassandra.auth.PlainTextAuthProvider("", "");
+var contactPoints = [""];
+var from = "table_a";
+var to = "table_b";
+
+var client = new cassandra.Client({
+  localDataCenter: "datacenter1",
+  contactPoints: contactPoints,
+  authProvider: authProvider,
+  keyspace: "twake",
+});
+
+//Copy object to other table
+(async () => {
+  const query = "SELECT * FROM " + from;
+  const parameters = [];
+
+  let count = 0;
+  let max = 0;
+  let min = new Date().getTime();
+
+  let rows = [];
+
+  const options = { prepare: true, fetchSize: 1000 };
+
+  await new Promise(r => {
+    client.eachRow(
+      query,
+      parameters,
+      options,
+      function (n, row) {
+        min = Math.min(parseInt(row.created_at.toString()), min);
+        max = Math.max(parseInt(row.created_at.toString()), max);
+        count++;
+        if (count % 100 == 0) {
+          console.log(count);
+        }
+        rows.push(row);
+      },
+      function (err, result) {
+        if (result && result.nextPage) {
+          result.nextPage();
+        } else {
+          r();
+        }
+      },
+    );
+  });
+
+  console.log("Downloaded ", count, " rows of ", from, ". Starting copy...");
+
+  let copyCount = 0;
+
+  for (let i = 0; i < count; i++) {
+    copyCount++;
+    if (copyCount % 100 == 0) {
+      console.log(copyCount, "of", count);
+    }
+
+    const row = rows[i];
+
+    await new Promise(r => {
+      let query =
+        "UPDATE " +
+        to +
+        " SET answers=?, created_at=?, created_by=?, last_activity=?, participants=?, updated_at=? WHERE id=?";
+      client.execute(
+        query,
+        [
+          row.answers,
+          row.created_at,
+          row.created_by,
+          row.last_activity,
+          row.participants,
+          row.updated_at,
+          row.id,
+        ],
+        () => {
+          r();
+        },
+      );
+    });
+  }
+  console.log("Ended with ", count, "threads");
+})();