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ElSql | Manage external SQL files in Java with a little DSL goodness | SQL Database library

 by   OpenGamma Java Version: v1.3 License: Non-SPDX

 by   OpenGamma Java Version: v1.3 License: Non-SPDX

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kandi X-RAY | ElSql Summary

ElSql is a Java library typically used in Database, SQL Database applications. ElSql has no bugs, it has no vulnerabilities, it has build file available and it has low support. However ElSql has a Non-SPDX License. You can download it from GitHub, Maven.
There are a number of techniques for creating SQL within a Java application. Choosing one as opposed to another can make a significant difference to the feel of coding the application. The main techniques are: * an Object Relational Mapper framework, such as JPA or Hibernate * appending Strings, such as sql = "SELECT foo " + "FROM bar " + "WHERE ..." * using a fluent API library, with methods like select("foo").from("bar").where(..) * reading in an external file, such as a properties file. This library focuses on the last of these - using an external file. It is a standalone library with no dependencies. The key benefit is a simple external file that a DBA can understand, something which is invaluable for later maintenance and debugging.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • ElSql has a low active ecosystem.
  • It has 91 star(s) with 20 fork(s). There are 61 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 6 open issues and 16 have been closed. On average issues are closed in 3 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of ElSql is v1.3
ElSql Support
Best in #SQL Database
Average in #SQL Database
ElSql Support
Best in #SQL Database
Average in #SQL Database

quality kandi Quality

  • ElSql has 0 bugs and 0 code smells.
ElSql Quality
Best in #SQL Database
Average in #SQL Database
ElSql Quality
Best in #SQL Database
Average in #SQL Database

securitySecurity

  • ElSql has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • ElSql code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
ElSql Security
Best in #SQL Database
Average in #SQL Database
ElSql Security
Best in #SQL Database
Average in #SQL Database

license License

  • ElSql has a Non-SPDX License.
  • Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.
ElSql License
Best in #SQL Database
Average in #SQL Database
ElSql License
Best in #SQL Database
Average in #SQL Database

buildReuse

  • ElSql releases are available to install and integrate.
  • Deployable package is available in Maven.
  • Build file is available. You can build the component from source.
  • Installation instructions are not available. Examples and code snippets are available.
  • It has 3496 lines of code, 316 functions and 38 files.
  • It has medium code complexity. Code complexity directly impacts maintainability of the code.
ElSql Reuse
Best in #SQL Database
Average in #SQL Database
ElSql Reuse
Best in #SQL Database
Average in #SQL Database
Top functions reviewed by kandi - BETA

kandi has reviewed ElSql and discovered the below as its top functions. This is intended to give you an instant insight into ElSql implemented functionality, and help decide if they suit your requirements.

  • Parse container section .
  • Load the content of a file into a list of strings .
  • Parses the loop size .
  • Returns true if the parameter matches a match .
  • Checks if is wildcard .
  • Apply loop index .
  • Creates a new ELBundle from the given configuration .
  • Parses an instance of EL SQL .
  • Generate SQL string .
  • Applies a query to the given parameters .

ElSql Key Features

the application looks up and refers to the "SelectBlogs" block of external SQL

two dashes are used for comments

tags start with the @ symbol

the primary blocks are @NAME(name) - the name refers to the block

indentation is used to create blocks - indented lines "belong" to the parent less-indented line

variables start with a colon

the various tags aim to handle over 80% of your needs

Community Discussions

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QUESTION

psql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory

Asked 2022-Apr-04 at 15:46

Not really sure what caused this but most likely exiting the terminal while my rails server which was connected to PostgreSQL database was closed (not a good practice I know but lesson learned!)

I've already tried the following:

  1. Rebooting my machine (using MBA M1 2020)
  2. Restarting PostgreSQL using homebrew brew services restart postgresql
  3. Re-installing PostgreSQL using Homebrew
  4. Updating PostgreSQL using Homebrew
  5. I also tried following this link but when I run cd Library/Application\ Support/Postgres terminal tells me Postgres folder doesn't exist, so I'm kind of lost already. Although I have a feeling that deleting postmaster.pid would really fix my issue. Any help would be appreciated!

ANSWER

Answered 2022-Jan-13 at 15:19

Resetting PostgreSQL

My original answer only included the troubleshooting steps below, and a workaround. I now decided to properly fix it via brute force by removing all clusters and reinstalling, since I didn't have any data there to keep. It was something along these lines, on my Ubuntu 21.04 system:

sudo pg_dropcluster --stop 12 main
sudo pg_dropcluster --stop 14 main
sudo apt remove postgresql-14
sudo apt purge postgresql*
sudo apt install postgresql-14

Now I have:

$ pg_lsclusters
Ver Cluster Port Status Owner    Data directory              Log file
14  main    5432 online postgres /var/lib/postgresql/14/main /var/log/postgresql/postgresql-14-main.log

And sudo -u postgres psql works fine. The service was started automatically but it can be done manually with sudo systemctl start postgresql.

Incidentally, I can recommend the PostgreSQL docker image, which eliminates the need to bother with a local installation.

Troubleshooting

Although I cannot provide an answer to your specific problem, I thought I'd share my troubleshooting steps, hoping that it might be of some help. It seems that you are on Mac, whereas I am running Ubuntu 21.04, so expect things to be different.

This is a client connection problem, as noted by section 19.3.2 in the docs.

The directory in my error message is different:

$ sudo su postgres -c "psql"
psql: error: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory
        Is the server running locally and accepting connections on that socket?

I checked what unix sockets I had in that directory:

$ ls -lah /var/run/postgresql/
total 8.0K
drwxrwsr-x  4 postgres postgres  160 Oct 29 16:40 .
drwxr-xr-x 36 root     root     1.1K Oct 29 14:08 ..
drwxr-s---  2 postgres postgres   40 Oct 29 14:33 12-main.pg_stat_tmp
drwxr-s---  2 postgres postgres  120 Oct 29 16:59 14-main.pg_stat_tmp
-rw-r--r--  1 postgres postgres    6 Oct 29 16:36 14-main.pid
srwxrwxrwx  1 postgres postgres    0 Oct 29 16:36 .s.PGSQL.5433
-rw-------  1 postgres postgres   70 Oct 29 16:36 .s.PGSQL.5433.lock

Makes sense, there is a socket for 5433 not 5432. I confirmed this by running:

$ pg_lsclusters
Ver Cluster Port Status                Owner    Data directory              Log file
12  main    5432 down,binaries_missing postgres /var/lib/postgresql/12/main /var/log/postgresql/postgresql-12-main.log
14  main    5433 online                postgres /var/lib/postgresql/14/main /var/log/postgresql/postgresql-14-main.log

This explains how it got into this mess on my system. The default port is 5432, but after I upgraded from version 12 to 14, the server was setup to listen to 5433, presumably because it considered 5432 as already taken. Two alternatives here, get the server to listen on 5432 which is the client's default, or get the client to use 5433.

Let's try it by changing the client's parameters:

$ sudo su postgres -c "psql --port=5433"
psql (14.0 (Ubuntu 14.0-1.pgdg21.04+1))
Type "help" for help.

postgres=#

It worked! Now, to make it permanent I'm supposed to put this setting on a psqlrc or ~/.psqlrc file. The thin documentation on this (under "Files") was not helpful to me as I was not sure on the syntax and my attempts did not change the client's default, so I moved on.

To change the server I looked for the postgresql.conf mentioned in the documentation but could not find the file. I did however see /var/lib/postgresql/14/main/postgresql.auto.conf so I created it on the same directory with the content:

port = 5432

Restarted the server: sudo systemctl restart postgresql

But the error persisted because, as the logs confirmed, the port did not change:

$ tail /var/log/postgresql/postgresql-14-main.log
...
2021-10-29 16:36:12.195 UTC [25236] LOG:  listening on IPv4 address "127.0.0.1", port 5433
2021-10-29 16:36:12.198 UTC [25236] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5433"
2021-10-29 16:36:12.204 UTC [25237] LOG:  database system was shut down at 2021-10-29 16:36:12 UTC
2021-10-29 16:36:12.210 UTC [25236] LOG:  database system is ready to accept connections

After other attempts did not succeed, I eventually decided to use a workaround: to redirect the client's requests on 5432 to 5433:

ln -s /var/run/postgresql/.s.PGSQL.5433 /var/run/postgresql/.s.PGSQL.5432

This is what I have now:

$ ls -lah /var/run/postgresql/
total 8.0K
drwxrwsr-x  4 postgres postgres  160 Oct 29 16:40 .
drwxr-xr-x 36 root     root     1.1K Oct 29 14:08 ..
drwxr-s---  2 postgres postgres   40 Oct 29 14:33 12-main.pg_stat_tmp
drwxr-s---  2 postgres postgres  120 Oct 29 16:59 14-main.pg_stat_tmp
-rw-r--r--  1 postgres postgres    6 Oct 29 16:36 14-main.pid
lrwxrwxrwx  1 postgres postgres   33 Oct 29 16:40 .s.PGSQL.5432 -> /var/run/postgresql/.s.PGSQL.5433
srwxrwxrwx  1 postgres postgres    0 Oct 29 16:36 .s.PGSQL.5433
-rw-------  1 postgres postgres   70 Oct 29 16:36 .s.PGSQL.5433.lock

This means I can now just run psql without having to explicitly set the port to 5433. Now, this is a hack and I would not recommend it. But in my development system I am happy with it for now, because I don't have more time to spend on this. This is why I shared the steps and the links so that you can find a proper solution for your case.

Source https://stackoverflow.com/questions/69754628

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install ElSql

You can download it from GitHub, Maven.
You can use ElSql like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the ElSql component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

Some useful project links:. ElSql is licensed under the Apache License v2.

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