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Can't create extensions plv8 postgresql

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问题 After install postgres, can't create extension plv8. I'm use: CREATE EXTENSION plv8; I'm getting: ERROR: could not open extension control file "/usr/local/share/postgresql/extension/plv8.control": No such file or directory ********** Error ********** ERROR: could not open extension control file "/usr/local/share/postgresql/extension/plv8.control": No such file or directory SQL state: 58P01 version postgres: 9.6.2 version pgAdmin4: 1.4 How to install plv8? 回答1: This should work on most

Can't create extensions plv8 postgresql

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Does PLV8 support making http calls to other servers?

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问题 If I write a function for PostgreSql using PLV8, can I call an url with a get/post request from my PLV8 function? 回答1: No, according to this page and my understanding of "trusted": PL/v8 is a trusted procedural language that is safe to use, fast to run and easy to develop, powered by V8 JavaScript Engine. 回答2: No, as explained by Milen; use an untrusted PL like PL/perlu, PL/pythonu, PL/javau, etc. Doing this has the same problem as sending email from a trigger, in that unexpected issues like

plv8 disadvantages or limitations?

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问题 I'm playing around with PLV8 to write trigger and stored procedures for PostgreSQL. So far I don't really see disadvantages compared to PLPGSQL. Especially if working with JSON it seems even smarter then PLPGSQL. Are there known disadvantages or limitations if using PLV8? Can PLV8 be a full replacement for PLPGSQL? It would be great if somebody could share his experience on this. 回答1: The advantages and disadvantages of PLV8 are same as advantages and disadvantages of PLPerl, PLPython and

It's possible to call functions in another schema from within plv8 functions?

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问题 I'm trying to use plv8 to write postgres functions. Now I would like to use the pgcrypt library in a way like this: CREATE OR REPLACE FUNCTION v01.myfunction(arg json) RETURNS json AS $BODY$ var res; res = obj.crypt(arg.password, res); plv8.elog(NOTICE, res); ... $BODY$ LANGUAGE plv8; Where crypt comes with the pgcrypt library and is find in another schema. But if running I get the error: ERROR: ReferenceError: obj is not defined Any idea? Thanks! 回答1: It's possible to call other PLV8

Can plv8 JavaScript language extension call 3rd party libraries?

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问题 In Postgresql, I want to call 3rd party libraries like moment.js or AWS lambda JS Client to invoke serverless functions from within the DB. I don't see any docs or examples how to do so: https://github.com/plv8/plv8/blob/master/README.md Is this possible and where can I find examples of how to 'import' or 'require' additional libraries? 回答1: The plv8 language is trusted so there is no way to load anything from the file system. However you can load modules from the database. Create a table

plv8 disable execute and prepare function in eval()

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问题 How could I deactivate the access to plv8 functions in my eval? create or replace function js(src text, input json) returns json as $$ plv8.elog(NOTICE, 'test'); //--plv8 = null; // this would disable permanently plv8, also after another call of the function var evalRes = eval('var output=null; ' + src + '; output;'); return JSON.stringify(evalRes); $$ LANGUAGE plv8; 回答1: I finally found the solution: create or replace function public.js(src text, input json) returns json as $$ //-- select js

Is it possible to create a re-usable function with the PostgreSQL plv8 extension?

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问题 I wanted to drop in google's open location code javascript implementation into PostgreSQL (using the plv8 extension) and make it available to encode/decode from PostGIS geometry/geography data types. While I was successful, I wasn't able to work out how to only create a single function for the https://github.com/google/open-location-code/blob/master/js/src/openlocationcode.js file and I ended up putting a copy of that function into each function where I needed to encode/decode plus codes.

Store and index YAML with PostgreSQL, with Javascript lib or reusable functions?

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问题 PostgreSQL 9.2 has native JSON support. I'd like to store human readable config files, however, in YAML. And I think I'd like to index a few (but not all) of the config file values. Therefore I'm wondering: Is it's somehow possible to include [a third party Javascript library that parses Yaml] in Postgres, for example js-yaml. Then I could have my own YAML Javascript helper, in the same way as there's the built-in JSON helper in PostgreSQL 9.2. Alternatively: is it possible to declare

Store and index YAML with PostgreSQL, with Javascript lib or reusable functions?

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PostgreSQL 9.2 has native JSON support. I'd like to store human readable config files, however, in YAML. And I think I'd like to index a few (but not all) of the config file values. Therefore I'm wondering: Is it's somehow possible to include [a third party Javascript library that parses Yaml] in Postgres, for example js-yaml . Then I could have my own YAML Javascript helper, in the same way as there's the built-in JSON helper in PostgreSQL 9.2. Alternatively: is it possible to declare individual reusable Javascript functions? If so, then I could add my own YAML parsing functions (based on