ldbc.codegen.parser.DatabaseStatementParser.scala Maven / Gradle / Ivy

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/**
 * Copyright (c) 2023-2024 by Takahiko Tominaga
 * This software is licensed under the MIT License (MIT).
 * For more information see LICENSE or https://opensource.org/licenses/MIT
 */

package ldbc.codegen.parser

import ldbc.codegen.model.*

/**
 * Parser for parsing Database definitions.
 */
trait DatabaseStatementParser extends TableParser:

  /**
   * Parser for parsing Database create statement.
   *
   * Please refer to the official documentation for MySQL Database create statement. SEE:
   * https://dev.mysql.com/doc/refman/8.0/en/create-database.html
   */
  private def createStatement: Parser[Database.CreateStatement] =
    opt(comment) ~> create ~> opt(comment) ~> (caseSensitivity("database") | caseSensitivity("schema")) ~>
      opt(comment) ~> opt(ifNotExists) ~> opt(comment) ~> sqlIdent ~ opt(comment) ~ opt(caseSensitivity("default")) ~
      opt(comment) ~ opt(character) ~ opt(collate) ~ opt(comment) ~ opt(encryption) <~
      opt(comment) <~ ";" ^^ {
        case name ~ _ ~ _ ~ _ ~ character ~ collate ~ _ ~ encryption =>
          Database.CreateStatement(name, character, collate, encryption.map(_.value))
      }

  /**
   * Parser for parsing Database drop statement.
   *
   * Please refer to the official documentation for MySQL Database drop statement. SEE:
   * https://dev.mysql.com/doc/refman/8.0/en/drop-database.html
   */
  private[ldbc] def dropStatement: Parser[Database.DropStatement] =
    customError(
      opt(comment) ~> drop ~> opt(comment) ~> (caseSensitivity("database") | caseSensitivity("schema")) ~>
        opt(comment) ~> opt(ifNotExists) ~> opt(comment) ~> sqlIdent <~ ";" ^^ { name =>
          Database.DropStatement(name)
        },
      failureMessage("drop database statement", "DROP {DATABASE | SCHEMA} [IF EXISTS] `database_name`")
    )

  /**
   * Parser for parsing Database use statement.
   */
  private def useDatabase: Parser[Database.DropStatement] =
    customError(
      opt(comment) ~> caseSensitivity("use") ~> opt(comment) ~> sqlIdent <~ opt(comment) <~ ";" ^^ { name =>
        Database.DropStatement(name)
      },
      failureMessage("use database statement", "USE `database_name`")
    )

  protected def databaseStatements: Parser[Database.CreateStatement | Database.DropStatement | Database.UseStatement] =
    createStatement | dropStatement | useDatabase