{
  "databaseChangeLog": [
    {
      "changeSet": {
        "id": "Add buildings_researches table",
        "author": "anibus",
        "changes": [
          {
            "createTable": {
              "tableName": "buildings_researches",
              "columns": [
                {
                  "column": {
                    "name": "building_id",
                    "type": "int",
                    "constraints": {
                      "nullable": false
                    }
                  }
                },
                {
                  "column": {
                    "name": "research_id",
                    "type": "int",
                    "constraints": {
                      "nullable": false
                    }
                  }
                }
              ]
            }
          },
          {
            "addUniqueConstraint": {
              "columnNames": "building_id, research_id",
              "constraintName": "uc_buildings_researches_research_id_building_id",
              "tableName": "buildings_researches"
            }
          },
          {
            "addForeignKeyConstraint":
            {
              "baseColumnNames":  "building_id",
              "baseTableName":  "buildings_researches",
              "constraintName":  "fk_buildings_buildings_researches",
              "referencedColumnNames":  "id",
              "referencedTableName":  "buildings",
              "onDelete": "CASCADE"
            }
          },
          {
            "addForeignKeyConstraint":
            {
              "baseColumnNames":  "research_id",
              "baseTableName":  "buildings_researches",
              "constraintName":  "fk_researches_buildings_researches",
              "referencedColumnNames":  "id",
              "referencedTableName":  "researches",
              "onDelete": "CASCADE"
            }
          }
        ]
      }
    }
  ]
}