text: function compileCreateIndex(ast, wrap = (v) => v) {
    const columns = ast.columns
      .map((column) => {
        return `${!column.expression ? wrap(column.name) : column.name}${
          column.collation ? ` COLLATE ${column.collation}` : ''
        }${column.order ? ` ${column.order}` : ''}`;
      })
      .join(', ');
  
    return `CREATE${ast.unique ? ' UNIQUE' : ''} INDEX${
      ast.exists ? ' IF NOT EXISTS' : ''
    } ${ast.schema ? `${wrap(ast.schema)}.` : ''}${wrap(ast.index)} on ${wrap(
      ast.table
    )} (${columns})${ast.where ? ` where ${ast.where}` : ''}`;
  }
  
  module.exports = {
    compileCreateIndex,
  };
  