UKOUG Tech15 - Going Full Circle - Building a native JSON Database API

1. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | GOING FULL CIRCLE Building a Native JSON Database API Marco Gralike Principle Consultant Oracle Ace Director eProseed, 09-12-2015 eProseed Confidential

9. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES eProseed Confidential9 What is JSON? Basic constructs (recursive)  Base values number, string, boolean, …  Objects { } sets of label-value pairs  Arrays [ ] lists of values

11. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES • JSON_VALUE – Return a single scalar value from a JSON Document • JSON_QUERY – Return a JSON Object or JSON Array from a JSON Document • JSON_EXISTS – Filter rows based on JSON-PATH expressions • JSON_TABLE – Project in-line, nested relational views from JSON Documents • JSON_TEXTCONTAINS – JSON aware full-text searching of JSON Documents eProseed Confidential11 Operators

13. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES • Used in the FROM clause • Creation of an inline relational view of JSON eProseed Confidential13 JSON_TABLE (1) SQL> SELECT m.* 2 FROM J_PURCHASEORDER p 3 , JSON_TABLE 4 ( p.PO_DOCUMENT, '$' 5 columns 6 po_rno FOR ORDINALITY, 7 po_number NUMBER(10) path '$.PONumber' 8 ) m 9 WHERE po_number > 1600 and PO_Number < 1605;

14. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES eProseed Confidential14 JSON_TABLE (2) SQL> SELECT m.* 2 FROM J_PURCHASEORDER p 3 , JSON_TABLE 4 ( p.PO_DOCUMENT, '$' 5 columns 6 po_number NUMBER(10) path '$.PONumber', 7 reference VARCHAR2(30) path '$.Reference', 8 requestor VARCHAR2(32) path '$.Requestor', 9 userid VARCHAR2(10) path '$.User', 10 center VARCHAR2(16) path '$.CostCenter' 11 ) m 12 WHERE po_number > 1600 and PO_Number < 1605;

15. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES • NULL on ERROR – The Default – Return NULL instead of raising the error • ERROR on ERROR – Raise the error (no special handling) • TRUE ON ERROR – In JSON_EXISTS – Return TRUE instead of raising the error eProseed Confidential15 ERROR Handling

16. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES • JSON_TABLE, JSON_QUERY – WITHOUT WRAPPER • Default, no change • Raise error, if scalar/multiple values in non JSON result – WITH WRAPPER • Wrap result as a JSON ARRAY [ ] – WITH CONDITIONAL WRAPPER • Wrap result as a JSON ARRAY [ ] • Don’t wrap result if scalar/multiple values in JSON result eProseed Confidential16 Un/conditional Wrapper

18. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES • JSON_TABLE – FORMAT JSON • Forces JSON_QUERY behavior • Therefore can have an explicit wrapper clause – Default • Projection like JSON_VALUE eProseed Confidential18 FORMAT JSON - Clause

19. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES RESOURCES • XMLDB / JSON Developers Guide • HOWTO: Building a JSON Database API (1) • HOWTO: Building a JSON Database API (2) • HOWTO: Building a JSON Database API (3) • HOWTO: Building a JSON Database API (4) eProseed Confidential19 Where to go from here…

20. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES RESOURCES • JSON_TABLE (syntax) • A WikiPedia JSON page • WikiPedia API (doc) • JSONView (JSON browser plugin) • UTL_HTTP and SSL (HTTPS) using Oracle Wallets eProseed Confidential20 Where to go from here…

21. Copyright © 2014, eProseed and/or its affiliates. All rights reserved. | REFERENCES RESOURCES • Stanford - Introduction to Databases (JSON) • Eclipse JSON Editor Plugin • JSON Schema • Get Started With JSON • www.json-generator.com • JSON Datasets: www.data.gov eProseed Confidential21 Where to go from here…

Notes de l'éditeur

The agenda of today is as follows: First I will discuss the three types of mobile architecture that are available in the market today Then I will discuss very briefly how MAF supports these architectures Next on the agenda are how choosing a certain mobile architecture impacts your services, security and scalability. Finally three use cases are discussed to show what considerations led to what choice.
The agenda of today is as follows: First I will discuss the three types of mobile architecture that are available in the market today Then I will discuss very briefly how MAF supports these architectures Next on the agenda are how choosing a certain mobile architecture impacts your services, security and scalability. Finally three use cases are discussed to show what considerations led to what choice.
The agenda of today is as follows: First I will discuss the three types of mobile architecture that are available in the market today Then I will discuss very briefly how MAF supports these architectures Next on the agenda are how choosing a certain mobile architecture impacts your services, security and scalability. Finally three use cases are discussed to show what considerations led to what choice.