lite-ui-sql-parser/lib/union.js

simple node sql parser

(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "./create", "./alter", "./select", "./delete", "./update", "./insert", "./command"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("./create"), require("./alter"), require("./select"), require("./delete"), require("./update"), require("./insert"), require("./command"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.create, global.alter, global.select, global._delete, global.update, global.insert, global.command);
    global.union = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _create, _alter, _select, _delete, _update, _insert, _command) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.unionToSQL = unionToSQL;
  _exports.multipleToSQL = multipleToSQL;
  const typeToSQLFn = {
    alter: _alter.alterToSQL,
    create: _create.createToSQL,
    select: _select.selectToSQL,
    delete: _delete.deleteToSQL,
    update: _update.updateToSQL,
    insert: _insert.insertToSQL,
    drop: _command.dropToSQL,
    truncate: _command.truncateToSQL,
    use: _command.useToSQL,
    rename: _command.renameToSQL,
    call: _command.callToSQL,
    set: _command.setVarToSQL,
    lock: _command.lockUnlockToSQL,
    unlock: _command.lockUnlockToSQL
  };

  function unionToSQL(stmt) {
    const fun = typeToSQLFn[stmt.type];
    const res = [fun(stmt)];

    while (stmt._next) {
      const unionKeyword = (stmt.union || 'union').toUpperCase();
      res.push(unionKeyword, fun(stmt._next));
      stmt = stmt._next;
    }

    return res.join(' ');
  }

  function multipleToSQL(stmt) {
    const res = [];

    for (let i = 0, len = stmt.length; i < len; ++i) {
      let astInfo = stmt[i] && stmt[i].ast;
      if (!astInfo) astInfo = stmt[i];
      res.push(unionToSQL(astInfo));
    }

    return res.join(' ; ');
  }
});