clickhouse: nullable types

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

@@ -1,6 +1,21 @@
 const { DatabaseAnalyser } = require('dbgate-tools');
 const sql = require('./sql');
 
+function extractDataType(dataType) {
+  if (!dataType) return {};
+  if (dataType.startsWith('Nullable(')) {
+    dataType = dataType.substring('Nullable('.length, dataType.length - 1);
+    return {
+      dataType,
+      notNull: false,
+    };
+  }
+  return {
+    dataType,
+    notNull: true,
+  };
+}
+
 class Analyser extends DatabaseAnalyser {
   constructor(connection, driver) {
     super(connection, driver);
@@ -23,7 +38,12 @@ class Analyser extends DatabaseAnalyser {
         ...table,
         primaryKeyColumns: undefined,
         sortingKeyColumns: undefined,
-        columns: columns.rows.filter((col) => col.pureName == table.pureName),
+        columns: columns.rows
+          .filter((col) => col.pureName == table.pureName)
+          .map((col) => ({
+            ...col,
+            ...extractDataType(col.dataType),
+          })),
         primaryKey: { columns: (table.primaryKeyColumns || '').split(',').map((columnName) => ({ columnName })) },
         sortingKey: { columns: (table.sortingKeyColumns || '').split(',').map((columnName) => ({ columnName })) },
         foreignKeys: [],

plugins/dbgate-plugin-clickhouse/src/frontend/driver.js

@@ -8,6 +8,17 @@ const dialect = {
   rangeSelect: true,
   stringEscapeChar: "'",
   fallbackDataType: 'String',
+
+  createColumn: true,
+  dropColumn: true,
+  changeColumn: true,
+  createIndex: true,
+  dropIndex: true,
+
+  columnProperties: {
+    columnComment: true,
+  },
+
   quoteIdentifier(s) {
     return `"${s}"`;
   },