clickhouse plugin - initial import

plugins/dbgate-plugin-clickhouse/src/backend/Analyser.js

@@ -0,0 +1,37 @@
+const { DatabaseAnalyser } = require('dbgate-tools');
+const sql = require('./sql');
+
+class Analyser extends DatabaseAnalyser {
+  constructor(connection, driver) {
+    super(connection, driver);
+  }
+
+  createQuery(resFileName, typeFields, replacements = {}) {
+    let res = sql[resFileName];
+    res = res.replace('#DATABASE#', this.pool._database_name);
+    return super.createQuery(res, typeFields, replacements);
+  }
+
+  async _runAnalysis() {
+    this.feedback({ analysingMessage: 'Loading tables' });
+    const tables = await this.analyserQuery('tables', ['tables']);
+    this.feedback({ analysingMessage: 'Loading columns' });
+    const columns = await this.analyserQuery('columns', ['tables', 'views']);
+
+    const res = {
+      tables: tables.rows.map((table) => ({
+        ...table,
+        primaryKeyColumns: undefined,
+        sortingKeyColumns: undefined,
+        columns: columns.rows.filter((col) => col.pureName == table.pureName),
+        primaryKey: (table.primaryKeyColumns || '').split(',').map((columnName) => ({ columnName })),
+        sortingKey: (table.sortingKeyColumns || '').split(',').map((columnName) => ({ columnName })),
+        foreignKeys: [],
+      })),
+    };
+    this.feedback({ analysingMessage: null });
+    return res;
+  }
+}
+
+module.exports = Analyser;