Postgres Json Array To Rows

Otherwise the array will contain one item for each row returned from the query. unwrap postgresql array into rows. This happens on lines 7-9. Prior to MySQL 8. In order to use the PostgreSQL adapter you need to have at least version 9. Trabla : Install MyBB 1. The methods and attributes of type objects are rarely used directly. fetchall() print json. It's similar to XSD for XML. Object fields that do not correspond to any output column name are ignored, and output. Wrap "myFunc()" around the return object. JSON by example FOSDEM PostgreSQL Devevoper Room January 2016 Stefanie Janine Stölting array_agg(row_to_json(albums)) AS album FROM albums GROUP BY artist_id). stringify on the parameter yourself before adding it to your array of parameters. One of PostgreSQL's benefits is that it's a relational database, but you can also get the advantages of unstructured data by storing things in a JSON column. 4, please let me know. So I wrote one. A simpler workaround is to tell PostgreSQL to cast implicitly from text to json: postgres=# create cast (text as json) without function as implicit; CREATE CAST. JSON structures are easy for both humans and machines to read. The column results from the use of SQL/JSON function json_query. An array can be constructed using the array_agg aggregate function or via a subquery. Multi-dimensional arrays. Wallah, I'm good to go. 4, “How to parse JSON data into an array of Scala objects. JSONB Share this post Since Postgres started supporting NoSQL (via hstore, json, and jsonb), the question of when to use Postgres in relational mode vs NoSQL mode has come up a lot. { "$schema": "http://json-schema. if you can in plpgsql 7. This is different from what we showed in PostgreSQL 9. A single file will be created using the merged JSON from each input row. jar file to the environment variable CLASSPATH. For example, if I query for serial 'AAA' I want test row 1 and 3 to be returned, and if I query for serial 'EEE' I want only test row 3. By Nando Vieira. This means that PostgreSQL supports the same three regular expressions flavors: Tcl Advanced Regular Expressions, POSIX Extended Regular Expressions and POSIX Basic Regular Expressions. This is a feature you won't find in most relational databases, and even databases that support some variant of it, don't allow you to use it as easily. Read data from a database and show it in Google Charts Non-associative arrays are output as JSON arrays; associative arrays are output as JSON object maps (see. DBD::Pg allows arrays (as arrayrefs) to be passed in to both the "quote" and the "execute" methods. SQL/JSON function json_table projects specific JSON data to columns of various SQL data types. The PostgreSQL matching function regexp_matches() implements what we need here, with the g flag to return every match found and not just the first tag in a message. Insert data for two dimensional array: 4. 7 Introduces a JSON Data Type There's a new JSON data type available in MySQL 5. select array_to_json('{{1,5},{99,100}}'::int[]) 2. A PostgreSQL multidimensional array becomes a JSON array of arrays. Laravel also supports querying JSON column types on databases that provide support for JSON column types. The JSON string to parse. These lists start with an open curly bracket, have a list of key-value pairs, and then. Using any one of the preceding methods will serialize a. If we are thinking to store large JSON document in PostgreSQL, we should also apply proper indexing on it. , storing days of the week, months of the year. I have made a test on my side and please take a try with the following workaround: Add a proper trigger, here I use Flow Button trigger. SELECT postgres_parent_json_object->>'postgres_child_json_tag' FROM postgres_table. PrestoDB: Convert JSON Array Of Objects into Rows. Querying JSON (JSONB) data types in PostgreSQL One of the unusual features of the PostgreSQL database is the ability to store and process JSON documents. Artikel saya kali ini adalah lanjutan dari posting yang kemarin tentang Contoh penggunaan Primary key dan Foreign key pada PostgreSQL. There are two ways to define a custom Hibernate Type: the UserType interface Java and SQL descriptors The latter option is preferred since it allows you to better split the Java-to-JDBC and the JDBC-to-SQL type handling. 背景 在PostgreSQL中使用JSON类型时,除了能存,大家更关心的是JSON中的数据的使用,例如 1. The docs lay out how to use each both for storing and for accessing data. With PostgreSQL 9. Each column in the result set becomes a property of the JSON object. Postgresql hstore provides the -> operator to query the value of a specific key from an hstore column. So be careful with your array indexes when accessing array elements. Wow! What’s next? This foray into querying jsonb data in postgres was an aside to a project I’m working on to bring json(b) querying to django. This is comparable to the type of calculation that can be done with an aggregate function. PostgreSQL 9. JSON generated with the WITHOUT_ARRAY_WRAPPER clause is escaped in FOR JSON output. 5: IMPORT FOREIGN SCHEMA. PostgreSQL allows you to define a column to be an array of any valid data type including built-in type, user-defined type or enumerated type. Press button, get TXT. In this case it is the serial-field of the objects in the array that I want to query for. You use it to map parts of a JSON document into the rows and columns of a new, virtual table, which you can also think of as an inline view. simple and have added the location of json-simple-1. It describes how to properly setup Active Record for PostgreSQL. you can do fun things like unnesting and array, and will end up with a new row for each item in the array. array_agg is a aggregate function like sum or count. With the release of version 9. Postgres offers us the json_agg() function, which takes an input values and aggregates them as a JSON array. I recently ran into an interesting challenge trying to use Postgres to work with JSON trees. There are two types that can be used: json; jsonb; Both PostgreSQL JSON types need to be materialized using a binary data format, so we need to use the JsonBinaryType this time. CSS Framework Icon Library. Use the PL/SQL JSON_ARRAY_T object type to construct and manipulate in-memory JSON arrays. // takes an array and desired key value and returns an array // searches through an array for a given key, if found the key that row is made the first row and the other rows are inserted accordingly. pgsql에서 다중 행 혹은 다중 열 데이터를 한 문자열로 만드는 쿼리 예제입니다. w3resource menu Front End. Active 2 days ago. name, 'pets', ( SELECT json_agg(all_pets) FROM pets ) ) FROM user WHERE user. It's similar to XSD for XML. The coalesce statement is one of the most powerful functions in PostgreSQL, because it ensures that your calculations and results are not filled with null values, which can cause errors in your applications. 7 that I've been playing with. You have a JSON string that represents an array of objects, and you need to deserialize it into objects you can use in your Scala application. Thus, I would consider the cast requirement to be an advantage. Read on to learn more about array types and the cool things you can do with it, and how to work with them in Go. BSON [bee · sahn], short for Bin­ary JSON, is a bin­ary-en­coded seri­al­iz­a­tion of JSON-like doc­u­ments. JSON by example FOSDEM PostgreSQL Devevoper Room January 2016 Stefanie Janine Stölting array_agg(row_to_json(albums)) AS album FROM albums GROUP BY artist_id). This article gives an explanation about how to create parent-child relation by splitting the string in SQL server as well as in PostgreSQL and also show you how you can manage hierarchical relational rows in SQL server as well as in PostgreSQL and how to create a hierarchical folder structure from any file path or string by splitting the string from a specific character such as split comma. To illustrate the functionality, let’s set up a simple table that stores country names in one column as TEXT and a list of some of the country’s cities in the second column as a TEXT ARRAY. Just shove it in a document-like column. The Promise of Postgres JSON. The behavior described for to_json likewise applies to each individual value converted by the other JSON creation functions. • json allows for two highly dubious “features” (duplicate object keys, stable object key order). Trabla : Install MyBB 1. 3, the maintainers added the ability to perform some simple queries on JSON structures and a few functions to convert from JSON to Postgres arrays and result sets. JSONB is an on disk binary representatin of JSON, this means it's more efficiently stored and indexable. then the result for each row is an array. An integer key or a string key name of the column of values to return. • For non-string/int/NULL types, uses the output function to create a string. Arrays Tweet. Well, here we go again. gt1329a Are you saying you have a JSON string, not the array literal you posted at first? If you have a string of JSON, you can use JSON. > Looking at the json_to_record example it took me quite a while that it is > not possible to put the json_to_record function right after the the from > clause but instead I would need to put the tables name in front, then use > the json_to_record function. Well, here we go again. Pattern 1 – JSON Array using Simple Transformation (Column names found in JSON) This is the most common pattern of multi-dimensional JSON array where column names are stored in a separate array and values are stored in another 2D array. See Indexing a Generated Column to Provide a JSON Column Index, for the SQL statements used to create and populate the jemp table in the set of examples just shown. -- json_push(column, field, json_value) -- Appends value to an array. So neither query reads a column, rather it calculates from either 1 or 2 columns, so I can't reference them. ARRAY_AGG( ORDER BY …) ARRAY(). Inserts are what you would expect, the main difference between Postgres's syntax and N1QL is that in the first, just a few columns of a row will contain a JSON encoded strings, while in the second one, the whole document is a JSON: Postgres:. To use JSON data with previous database versions (either with the 9. A PostgreSQL multidimensional array becomes a JSON array of arrays. 4 expand jsonb int array into table. Convert postgres JSON to rows. Since the JSON data was already there, we decided to take advantage of that using Postgresql’s ILIKE operator and its native JSON search. select json_array_length('[1,2,3,{"f1. Instead one of the following function can be used: json_array_elements(json) (9. The data type of the column people is json, as is the result of json_array_elements(people). w3resource menu Front End. select json array from PostgreSQL. The data type of a column receiving an element must be compatible with the element value passed to it. To get started with PostgreSQL have a look at the configuring Rails guide. This functions gets the value at the specified path. What is JSON? Before proceeding ahead, let me brief you on what exactly is JSON (JavaScript Object Notation). First, we have to create subquery which will convert the rows from our options table into their JSON representation. With SQL Server 2016, you can store JSON objects in your rows. Because PostgreSQL is an object-relational database, arrays of values can be stored for most of the existing data types. Then put the column definitions behind it and. Implementing Custom Mapping Overview. Note: Since this article was published in 2015, PostgreSQL has improved its JSON features with JSONB support. JSONB is an on disk binary representatin of JSON, this means it's more efficiently stored and indexable. gets 5 rows from the tweet_pgh table and dumps them to that file. This data type must be used in conjunction with the Auto-Increment data type: that ensures that every row has a unique numeric value, which this data type uses to reference the parent rows. If not specified, the result is returned as a string. 2+) : How to return an empty json array from an empty resultset. To install the dependencies outlined in the package. Hallo jumpa lagi smile. For example, the SerializeJSON function with a serializeQueryByColumns parameter value of false converts a ColdFusion query with two columns, City, and State, and two rows of data into following format:. Description: Takes a well-formed JSON string and returns the resulting JavaScript value. Aggregate Rows into a JSON Array Using the json_agg() Function. I published a couple of articles on JSON Data Type. Right now, we’ll simply begin with an example that creates and populates a table (country) with a JSON column ( extra_info ). select array_to_json (array_agg (row_to_json (t))) from (select id, text from words) t. row_to_json returns each of the rows as JSON object. In this part, you're going to use UNNEST function to break down the array object into records or rows. It just seems like a bit much that I have to take the jsonb array, convert it into a relation so that SELECT can operate on it, only so that I can sort it, and then convert it back into a jsonb array object. ROW and FIRST are synonymous with ROWS and NEXT respectively. Need to setup Postgres? On a Mac? Check out Postgres. Let’s look into both of them in detail. Listening to generic JSON notifications from PostgreSQL in Go September 15, 2015 It’s already widely known that PostgreSQL is the leading open source relational database when it comes to features. Now Let’s enhance the SQL query to include the order details like ProductID and Line total. JSON (JavaScript Object Notation) is a lightweight data-interchange format. 4 introduced WITH ORDINALITY for generating a sequence number for each element which are produced by UNNEST(). The returned table. However, if you need to keep the order of the keys in your document or if you have repeated keys you may want to use this function instead. Maybe there isn't a less verbose way. It seems that array values must be formatted with reference to some schema knowledge, and that currently they're assumed to always be JSON arrays. Using Array_agg in Postgres – Powerful and Flexible In almost any application it’s common to want to aggregate some set of values together, commonly in a comma separated form. This is achieved using the data option in the initialisation object, passing in an array of data to be used (like all other DataTables handled data, this can be arrays. parents('tr. Some of them, such as operators, I can not do using UDF functions only. Let’s talk about making the JSON data easier to use. For example, if you have a JSON key named timestamp , set this parameter to {"ts": "timestamp"} to map this key to a column named ts. With our JSON data source we need two key pieces of information: Where the array of data that represents the rows of data in the table is in the object; Where the data point for each column is in the row object / array. Pattern 1 – JSON Array using Simple Transformation (Column names found in JSON) This is the most common pattern of multi-dimensional JSON array where column names are stored in a separate array and values are stored in another 2D array. SQL is a language where one task can be solved multiple ways with different efficiency. I am trying to create nested json array using 2 tables. This can put you down the path of correcting the schema. Convert the array into JSON using the json_encode() function. If you do not need or do not want this behavior you can pass rowMode: 'array' to a query object. Sometimes it requires to populate JSON formatted data for a web service purpose. July 14, 2012 March 11, 2014. One example for it is PostgreSQL’s JSONB data type which allows you to store JSON documents efficiently in a database column. Laravel also supports querying JSON column types on databases that provide support for JSON column types. Each row will be generated as separate JSON object in the array. Such data can also be stored as text, but the JSON data types have the advantage of enforcing that each stored value is valid according to the JSON rules. The TIMESTAMPTZ is the PostgreSQL's extension to the SQL standard's temporal data types. unwrap postgresql array into rows. 4 after we are done) 2016-09-25 09:19 Regina Obe * [r15140] Document populate_topology_layer closes #3462 2016-09-25 07:32 Regina Obe * [r15139] Bring Tuning section up to date, by incorporating some of Mike Toews changes Add mention of configs to enable parallel queries Get rid of broken link to Kevin Neufeld's old. Ask Question Asked 7 years, 11 months ago. Not all options apply everywhere; for example, since findOne already returns only one result row as an object, most options will be redundant or of little use, except for columns. web developer and programmer tools. 3, the maintainers added the ability to perform some simple queries on JSON structures and a few functions to convert from JSON to Postgres arrays and result sets. The documentation covers all the details in the chapters entitled JSON Types and JSON Functions and Operators. Using Array_agg in Postgres - Powerful and Flexible In almost any application it's common to want to aggregate some set of values together, commonly in a comma separated form. {"widget": { "debug": "on", "window": { "title": "Sample Konfabulator Widget", "name": "main_window", "width": 500, "height": 500 }, "image": { "src": "Images/Sun. Batch Mode: Input rows can be batched and sent in a single request. array_agg is a aggregate function like sum or count. Most Popular. Each row will be generated as separate JSON object in the array. Database Research & Development: Full demonstration about, How to convert JSON Array into PostgreSQL String Array using jsonb_array_elements and string_agg functions. For links to other blogs in this series, please scroll to the end of this post. You can also insert an array of JSON rows because the same code will work. Use this tool to convert JSON into CSV (Comma Separated Values) for Excel Upload your JSON text, file or URL into this online converter (Press the cog button on the right for advanced settings) Download the resulting CSV file when prompted; Open your CSV file in Excel or Open Office. Otherwise it will parse JSON as an array of arrays of columns and won't display column names. Postgres allows columns to be defined as arrays of variable length. In that you will also have to provide the source table. ready(function() { //you don't need to use var here, because myVariables is in the global scope. If no rows are returned the array will be empty. Thus, I would consider the cast requirement to be an advantage. So for this example, the information on the ServicesDataInJson is an array of 'objects' that contains the information of our customer on each service. Use json_array_elements(json) (9. Declaration of Arrays Array type can be declared as : CREATE TABLE monthly_savings (name text, saving_per_quarter integer[], scheme text. BLOB, mean that that column will be returned as an instance of Buffer when being fetched by sequelize. If you are one of them who wants to export JSON from SQL Server or any other RDBMS like MySQL, Oracle then you can easily output complex JSON using any of the following components. By default, it is zero if the OFFSET clause is not specified. Database Research & Development: Demonstration to create an index on the property of JSON data column in PostgreSQL. I pull this Json file using a web call to an API (specifically Oracle Right Now). INTEGER }) When defining a model you can just as easily pass a string as type, but often using the types defined here is beneficial. Is this an expected one ?. > Looking at the json_to_record example it took me quite a while that it is > not possible to put the json_to_record function right after the the from > clause but instead I would need to put the tables name in front, then use > the json_to_record function. Type objects are supplied to Table definitions and can be supplied as type hints to functions for. Ask Question Asked 7 years, 11 months ago. Looking out for solutions to fix the problem, we came across PostgreSQL JSON functions. PostgreSQL 10 is now available for everyone to use, and hinted by David Fetter I had to review my previous article on Json and SQL to adapt to Set Returning Functions changes. 2 was basically a text column flagged as JSON data for processing through a parser. Suppose that I have the array {5,77,39,19}. SELECT array_to_json(array_agg(row_to_json(t))) FROM t This converts each row to a JSON object, aggregates the JSON objects as an array, and then converts the array to a JSON array. unnest() is for PostgreSQL's array types. Active 2 days ago. This means that PostgreSQL supports the same three regular expressions flavors: Tcl Advanced Regular Expressions, POSIX Extended Regular Expressions and POSIX Basic Regular Expressions. I also wouldn't do this routinely. For the JSON column type, the two JSON Object(s) mapping must be changed as. It aggregates its argument into a PostgreSQL array. JSON stands for JavaScript Object Notation. With JSON, Postgres can support document databases alongside relational tables and even combine structured and unstructured data. The coalesce function can be used to substitute zero or an empty array for null when necessary. execute('select array_agg(row_to_json(blogcomments)) from blogcomments limit 10') res=cur. Since the version 9. The WITHOUT FUNCTION clause is used because text and json have the same on-disk and in-memory representation, they’re basically just aliases for the same data type. Install the Dependencies. Let’s open our tests. PostgreSQL ARRAY_UPPER() function with Example : This function is used to return upper bound of the requested array dimension. 另一种常用的技术是 array_agg 和 array_to_json。array_agg 是一个聚合函数 sum 或 count。它聚集成一个 PostgreSQL 数组参数。array_to_json 以 PostgreSQL数组 拼合成一个单一的JSON值。 我们来看看 array_to_json 的用法:. (PostgreSQL supported JSON before version 9. PostgreSQL has built-in support for JSON with a great range of processing functions and operators, and complete indexing support. Postgres offers us the json_agg() function, which takes an input values and aggregates them as a JSON array. In the initial batch of JSON data, if a field's values are always null, Spark infers this field as StringType. JSON関数と演算子. For more information, see Convert JSON Data to Rows and Columns with OPENJSON (SQL Server). • JSON_EXISTS - test whether a JSON path expression returns any SQL/JSON items. Once you have collected data in Fulcrum, you may want to export it into a local database within your. Maps column names to JSON keys that aren't identical to the column names. Easy to understand and informative one, good job man! Recently I studied the question of generating JSON data. DataTables requires an array of items to represent the table's data, where each item in the array is a row. 3 and Postgres 9. Since a dump of your code would be complicated, I will answer based on my way to code. SQL/JSON function json_table projects specific JSON data to columns of various SQL data types. But it got me thinking 'What if we export the data from PostgreSQL directly to JSON and then import it to MongoDB?'. A PostgreSQL multidimensional array becomes a JSON array of arrays. SELECT json_build_array Query Quill-Delta JSON array in Postgres. If you’re using PostgreSQL, One file contains JSON row arrays, and the other JSON key-value objects. The data is not accessible to those without JavaScript. We will need to come up with the shape and content of the data as discussed above, turn the result table into JSON using json_agg , adjust some PSQL settings related to the output formatting, and, lastly, save the resulting JSON dump to a file. 2 supported. Columns are defined dynamically when you write data, and data is not typed, as it is all stored as byte arrays. Learn how to convert arrays to json objects to display their data in Builder popups. row_to_json returns each of the rows as JSON object. 4: How to Convert JSON ARRAY Elements into String ARRAY; PostgreSQL 9. For more advanced querying and analysis, the OPENJSON function can transform an array of JSON objects into a set of rows. The data type of the column people is json, as is the result of json_array_elements(people). Each row of the result set ends up as a single element in the array. This brings part of that usefulsness to PostgreSQL by letting you query in a similar way. It must be one of the oldest use cases in the world of relational databases: you have an entity, and you need to store certain properties of this entity. To create a GIN index on the news_feed column, execute the following command: CREATE INDEX news_feed_data_gin_idx ON news_feed USING GIN (data);. JSONB, each of which offer more operators than just the basic type. When to use unstructured datatypes in Postgres-Hstore vs. As explored in my last Oracle Magazine article, Oracle Database 12c Release 2 adds several predefined object types to PL/SQL to enable fine-grained programmatic construction and manipulation of in-memory JSON data. The release notes list: > Make json_populate_record() and related functions process JSON arrays > and objects recursively (Nikita Glukhov) > With this change, array-type fields in the destination SQL type are > properly converted from JSON arrays, and composite-type fields are > properly converted from JSON objects. 2 was basically a text column flagged as JSON data for processing through a parser. Object fields that do not correspond to any output column name are ignored, and output. Read on to learn more about array types and the cool things you can do with it, and how to work with them in Go. JSON Output. Json 数据类型在PostGreSQL中无疑是其较其他关系型数据库的一大亮点,可以存储对象,类似nosql的文档数据类型啦,当然现在MySQL的最新版本中也包含了Json数据类型,所以好好总结下Json的用法还是很有必要的,这里主要针对Json Array 的赋值方法做个小结,因为在. I'm trying to map the results of a query to JSON using the row_to_json() function that was added in PostgreSQL 9. define('model', { column: DataTypes. For info about the differences between JSON_VALUE and JSON_QUERY , see Compare JSON_VALUE and JSON_QUERY. I just need to dump the results into an integer array. But that seems to be missing from the provided arsenal of JSON functions. Using Array_agg in Postgres – Powerful and Flexible In almost any application it’s common to want to aggregate some set of values together, commonly in a comma separated form. Then merge schema failed because schema inconsistency. While selecting rows from a table, the result set is formatted as an array of JSON objects. • Returns a json (not jsonb) object. BLOB, mean that that column will be returned as an instance of Buffer when being fetched by sequelize. June 15, 2017 at 2:25 pm #72937. row_to_json returns each of the rows as JSON object. Need to setup Postgres? On a Mac? Check out Postgres. The function json_encode will basically convert our PHP structure into a JSON format that can be saved to file (or in this case, a database). 4: The JSON data type is Awesome (Part 1/3) PostgreSQL 9. It is more about scope. ['id', 'title'], it resolves the promise / fulfills the callback with an array of all the added rows with specified columns. The Postgres docs actually do a great job of explaining what window functions are: "A window function performs a calculation across a set of table rows that are somehow related to the current row. Discussion Flatten arrays in column having Json and also select other column values. Note: array_to_json and row_to_json have the same behavior as to_json except for offering a pretty-printing option. 去年 Qiita PostgreSQL 9. Introduction. Arrays of any built-in or user-defined base type, enum type, or composite type can be created. Unfortunately, PostgreSQL cannot create arrays of anonymous records. In particular, sum of no rows returns null, not zero as one might expect, and array_agg returns null rather than an empty array when there are no input rows. Introduction. Use this tool to convert JSON into CSV (Comma Separated Values) for Excel Upload your JSON text, file or URL into this online converter (Press the cog button on the right for advanced settings) Download the resulting CSV file when prompted; Open your CSV file in Excel or Open Office. This also applies to empty arrays and empty objects. Read on to learn more about array types and the cool things you can do with it, and how to work with them in Go. Here is an example of a JSON document:. Such data can also be stored as text, but the JSON data types have the advantage of enforcing that each stored value is valid according to the JSON rules. So, definitely worth support in jOOQ - will have to think about the syntax though. There are times when you might want to store multiple values in one database column instead of across multiple tables. 2 Native JSON type support. 2, though in reality the more usable version arrived in Postgres 9. • JSON_EXISTS - test whether a JSON path expression returns any SQL/JSON items. A PostgreSQL multidimensional array becomes a JSON array of arrays. Use the PL/SQL JSON_ARRAY_T object type to construct and manipulate in-memory JSON arrays. Read more about that in "Could PostgreSQL 9. With our JSON data source we need two key pieces of information: Where the array of data that represents the rows of data in the table is in the object; Where the data point for each column is in the row object / array. JSON関数と演算子. For example, we might want to aggregate the album records for a specific artist into a JSON array: Aggregate Album Records into JSON Array using json_agg():. It allows storing of JSON data and enforces they are represented in valid JSON format. Convert DataTable to JSON using JavaScriptSerializer. regexp_split_to_table and string_to_array unnest performance Printer Friendly Whenever you need to split a text into multiple records breaking by some delimeter, there are two common options that PostgreSQL provides. One of the main features I love about PostgreSQL is its array support. The OPENJSON function takes a single JSON object or a collection of. It's a job for json_to_recordset , which takes a JSON array as input and returns the records. And today we're continuing to expand, going beyond SQL bringing the full power of the V8 JavaScript engine to your Heroku Postgres database. This is an excerpt from the Scala Cookbook (partially modified for the internet). All you need to do in your C++ code is escape all double quotes in your string and then bind it to as a normal string. Since JSON_QUERY always returns valid JSON, FOR JSON knows that this result does not have to be escaped. So be careful with your array indexes when accessing array elements. I can preprocess the data with a simple Awk script to wrap it in whatever characters are necessary, but it won't be K:V data unless I synthesize keys. Convert postgres JSON to rows. Since a dump of your code would be complicated, I will answer based on my way to code. Postgres Setup. The best text and video tutorials to provide simple and easy learning of various technical and non-technical subjects with suitable examples and code snippets. You could finally use Postgres as a “NoSQL” database. 3 and below. , storing days of the week, months of the year. PL/pgSQL array support in anything earlier than 7. JSON data types are for storing JSON (JavaScript Object Notation) data, as specified in RFC 7159. What is the fastest way to unwrap array into. In both cases, the array is flattened into a string representing a Postgres array. So for this example, the information on the ServicesDataInJson is an array of ‘objects’ that contains the information of our customer on each service.