showPrecisionQuery: (tableName: string, schemaName?: string) => {
    return `SELECT COLUMN_NAME AS column_name, NUMERIC_PRECISION AS numeric_precision, NUMERIC_SCALE AS numeric_scale
    FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = '${tableName}'` + (!schemaName ? '' : ` AND TABLE_SCHEMA = '${schemaName}'`);
  },