Document Data Model & Mongo Query Language #358
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…erhaps removed later), als store logic
…eny-DB into mongodb-adapter
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mongodb-adapter/src/main/java/org/polypheny/db/adapter/mongodb/MongoFilter.java
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…eny-DB into document-schema
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This PR introduces the document data model into Polypheny. It combines two main parts in the document data model itself and the MongoDB Query Language.
Document Model
Adds multiple new functions, which enable the document model for document-supported adapters in MongoDB but also non-document-supported adapters.
DDL: changes throughout Polypheny to enforce the more dynamic data document model, by adding 2 fixed columns for each dcoumet collection in
_id(primary key) and_data(dynamic fields as BSON)DML:
LogicalDocuments, which enables different handling of values for document and non-document-supported adapters, as well as remove, replace and rename logic for documentsDQL:
DOC_QUERY_VALUEandDOC_QUERY_EXCLUDEfunctions, which enable extracting of the _data field while quering if necessaryJSON type: wrapper type for large VARCHAR, which enforces JSON structure on data modification
MongoDB Query Language
Parsing of MongoQL strings to equivalent relational algebra, as well as additional MongoQL specific query functionality like
elemMatchorunwind. The used language implemenation follows the MongoDB Query Language reference, a detailed reference can be found on the websiteMqlParser: JavaCC implemenation of MongoQL input parserMqlToRelConverter: Converting of parsed MongoQL objects toRelNodeobjectsMqlInterface: MongoQL Rest interface, which is used for integration testing and can query Polypheny with MongoQLMinor Changes
This PR is the logical counterpart to: Document Data Model & MongoDB Query Language UI