{"type":"doc","content":[{"type":"panel","attrs":{"panelType":"info"},"content":[{"type":"paragraph","content":[{"text":"The Multiple Database Tables batch source plugin is available in the Hub.","type":"text"}]}]},{"type":"paragraph","content":[{"text":"Plugin version: 1.4.1","type":"text"}]},{"type":"paragraph","content":[{"text":"Re","type":"text","marks":[{"type":"annotation","attrs":{"annotationType":"inlineComment","id":"907ddc02-e821-4d74-bc17-c5fdca7ba371"}},{"type":"annotation","attrs":{"annotationType":"inlineComment","id":"b1ce9a27-0e02-43d6-a671-9c318882c7d4"}}]},{"text":"ads from multiple tables within a database using JDBC. This source is often used with the Google Cloud Storage Multi Files Sink and Google BigQuery Multi Table Sink. ","type":"text","marks":[{"type":"annotation","attrs":{"annotationType":"inlineComment","id":"b1ce9a27-0e02-43d6-a671-9c318882c7d4"}}]}]},{"type":"paragraph","content":[{"text":"The source outputs a record for each row in the tables it reads, with each record containing an additional field that holds the name of the table the record came from. In addition, for each table it reads, this plugin sets pipeline arguments where the key is ","type":"text","marks":[{"type":"annotation","attrs":{"annotationType":"inlineComment","id":"b1ce9a27-0e02-43d6-a671-9c318882c7d4"}}]},{"text":"multisink.[tablename]","type":"text","marks":[{"type":"annotation","attrs":{"annotationType":"inlineComment","id":"b1ce9a27-0e02-43d6-a671-9c318882c7d4"}},{"type":"code"}]},{"text":" and the value is the schema of the table. This makes it work with the Google Cloud Storage Multi Files Sink and Google BigQuery Multi Table Sink.","type":"text","marks":[{"type":"annotation","attrs":{"annotationType":"inlineComment","id":"b1ce9a27-0e02-43d6-a671-9c318882c7d4"}}]}]},{"type":"panel","attrs":{"panelType":"note"},"content":[{"type":"paragraph","content":[{"text":"Note:","type":"text","marks":[{"type":"annotation","attrs":{"annotationType":"inlineComment","id":"b1ce9a27-0e02-43d6-a671-9c318882c7d4"}},{"type":"strong"}]},{"text":" Although you can change table names with runtime arguments and the JavaScript transformation, you cannot view lineage for the pipeline if you do this. It’s recommended to avoid changing table names in plugins downstream from the source plugins.","type":"text","marks":[{"type":"annotation","attrs":{"annotationType":"inlineComment","id":"b1ce9a27-0e02-43d6-a671-9c318882c7d4"}}]}]}]},{"type":"heading","attrs":{"level":2},"content":[{"text":"Configuration","type":"text"}]},{"type":"table","attrs":{"layout":"default","width":760.0,"localId":"094f32b0-59f9-4c2a-8bff-f68ebb8f8295"},"content":[{"type":"tableRow","content":[{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":[194.0]},"content":[{"type":"paragraph","content":[{"text":"Property","type":"text","marks":[{"type":"strong"}]}]}]},{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":[92.0]},"content":[{"type":"paragraph","content":[{"text":"Macro Enabled?","type":"text","marks":[{"type":"strong"}]}]}]},{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":[128.0]},"content":[{"type":"paragraph","content":[{"text":"Version Introduced","type":"text","marks":[{"type":"strong"}]}]}]},{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":[346.0]},"content":[{"type":"paragraph","content":[{"text":"Description","type":"text","marks":[{"type":"strong"}]}]}]}]},{"type":"tableRow","content":[{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[194.0]},"content":[{"type":"paragraph","content":[{"text":"Reference Name","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[92.0]},"content":[{"type":"paragraph","content":[{"text":"No","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[128.0]},"content":[{"type":"paragraph"}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[346.0]},"content":[{"type":"paragraph","content":[{"text":"Required. 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query:","type":"text"}]},{"type":"codeBlock","content":[{"text":"SELECT \n u.id, \n c.id \nFROM \n users u JOIN \n comments c ON u.id = c.user_id \nWHERE \n u.name = 'John'","type":"text"}]},{"type":"paragraph","content":[{"text":"Will have the table name ","type":"text"},{"text":"users_comments","type":"text","marks":[{"type":"code"}]},{"text":". However, the resulting records for the following query:","type":"text"}]},{"type":"codeBlock","content":[{"text":"SELECT \n c.id, \n u.id \nFROM \n users u JOIN \n comments c ON u.id = c.user_id \nWHERE \n u.name = 'John'","type":"text"}]},{"type":"paragraph","content":[{"text":"Will have the table name ","type":"text"},{"text":"comments_users","type":"text","marks":[{"type":"code"}]},{"text":" as the first returned column comes from the ","type":"text"},{"text":"comments","type":"text","marks":[{"type":"code"}]},{"text":" table.","type":"text"}]},{"type":"paragraph","content":[{"text":"Note that, as mentioned earlier, the table names are concatenated in order of first appearance, without duplicates:","type":"text"}]},{"type":"codeBlock","content":[{"text":"SELECT \n u.id, \n s.upvotes, \n s.downvotes, \n c.id, \n u.username,\n c.timestamp,\n s.id\nFROM \n users u JOIN \n comments c ON u.id = c.user_id JOIN \n scores s ON s.comment_id = c.id\nWHERE \n u.name = 'John'","type":"text"}]},{"type":"paragraph","content":[{"text":"Will have the table name ","type":"text"},{"text":"users_scores_comments","type":"text","marks":[{"type":"code"}]},{"text":".","type":"text"}]},{"type":"heading","attrs":{"level":4},"content":[{"text":"If table names cannot be derived","type":"text"}]},{"type":"paragraph","content":[{"text":"There are instances where a table name cannot be derived. In this case, table names will follow the following pattern:","type":"text"}]},{"type":"codeBlock","content":[{"text":"sql_statement_","type":"text"}]},{"type":"paragraph","content":[{"text":"The ","type":"text"},{"text":"","type":"text","marks":[{"type":"code"}]},{"text":" in this statement will be the position of this query in the list of statements, starting with position 1.","type":"text"}]},{"type":"heading","attrs":{"level":4},"content":[{"text":"Examples","type":"text"}]},{"type":"paragraph","content":[{"text":"For example, if the JDBC driver is able to provide the Table Name from a SQL statement ResultSet, the derived table name will look as follows:","type":"text"}]},{"type":"table","attrs":{"layout":"default","width":760.0,"localId":"37b12ec4-485f-448e-b750-48d094bf534d"},"content":[{"type":"tableRow","content":[{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"SQL Statement","type":"text","marks":[{"type":"strong"}]}]}]},{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"Table Alias","type":"text","marks":[{"type":"strong"}]}]}]},{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"JDBC Driver support","type":"text","marks":[{"type":"strong"}]}]}]},{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"Derived Table Name","type":"text","marks":[{"type":"strong"}]}]}]}]},{"type":"tableRow","content":[{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"SELECT * FROM table1","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"my_alias_1","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"Yes","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"my_alias_1","type":"text"}]}]}]},{"type":"tableRow","content":[{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"SELECT * FROM table2","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"Yes","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"table2","type":"text"}]}]}]},{"type":"tableRow","content":[{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"SELECT * FROM users JOIN orders ON …","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"No","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"sql_statement_2","type":"text"}]}]}]},{"type":"tableRow","content":[{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"SELECT * FROM users JOIN orders ON …","type":"text"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":[170.0]},"content":[{"type":"paragraph","content":[{"text":"