feat: basic firebird analyser

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

@@ -0,0 +1,51 @@
+const _ = require('lodash');
+const sql = require('./sql');
+const { getDataTypeString } = require('./helpers');
+
+const { DatabaseAnalyser } = require('dbgate-tools');
+
+class Analyser extends DatabaseAnalyser {
+  constructor(dbhan, driver, version) {
+    super(dbhan, driver, version);
+  }
+
+  async _runAnalysis() {
+    const tablesResult = await this.driver.query(this.dbhan, sql.tables);
+    const columnsResult = await this.driver.query(this.dbhan, sql.columns);
+
+    const columns = columnsResult.rows.map(i => ({
+      tableName: i.TABLENAME,
+      columnName: i.COLUMNNAME,
+      notNull: i.NOTNULL,
+      isPrimaryKey: i.ISPRIMARYKEY,
+      dataType: getDataTypeString(i),
+      precision: i.NUMBERPRECISION,
+      scale: i.SCALE,
+      length: i.LENGTH,
+      defaultValue: i.DEFAULTVALUE,
+      columnComment: i.COLUMNCOMMENT,
+      isUnsigned: i.ISUNSIGNED,
+      pureName: i.PURENAME,
+      schemaName: i.SCHEMANAME,
+    }));
+    const tables = tablesResult.rows.map(i => ({
+      pureName: i.PURENAME,
+      objectId: i.OBJECTID,
+      schemaName: i.SCHEMANAME,
+      objectComment: i.OBJECTCOMMENT,
+    }));
+
+    return {
+      tables: tables.map(table => ({
+        ...table,
+        columns: columns.filter(column => column.tableName === table.pureName),
+      })),
+    };
+  }
+
+  async _getFastSnapshot() {
+    return this._runAnalysis();
+  }
+}
+
+module.exports = Analyser;