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omni_var

Scoped variables

omnigres : Scoped variables

Overview

ID Extension Package Version Category License Language
2973 omni_var omnigres 0.3.0 FEAT Apache-2.0 C
Attribute Has Binary Has Library Need Load Has DDL Relocatable Trusted
--s-d-- No Yes No Yes no no
Relationships
Schemas omni_var
Need By omni_kube omni_rest omni_session
See Also pg_variables session_variable envvar
Siblings omni omni_auth omni_aws omni_cloudevents omni_containers omni_credentials omni_email omni_http omni_httpc omni_httpd omni_id omni_json omni_kube omni_ledger omni_manifest omni_mimetypes omni_os omni_polyfill omni_python omni_regex omni_rest omni_schema omni_seq omni_service omni_session omni_sql omni_sqlite omni_test omni_txn omni_types omni_vfs omni_vfs_types_v1 omni_web omni_worker omni_xml omni_yaml

Packages

Type Repo Version PG Major Compatibility Package Pattern Dependencies
EXT PIGSTY 0.3.0 18 17 16 15 14 omnigres -
RPM PIGSTY 20251108 18 17 16 15 14 omnigres_$v -
DEB PIGSTY 20251108 18 17 16 15 14 postgresql-$v-omnigres -
Linux / PG PG18 PG17 PG16 PG15 PG14
el8.x86_64 PIGSTY 20251108 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120
el8.aarch64 PIGSTY 20251108 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120
el9.x86_64 PIGSTY 20251108 PIGSTY 20250507 PIGSTY 20250507 PIGSTY 20250507 PIGSTY 20250507
el9.aarch64 PIGSTY 20251108 PIGSTY 20250507 PIGSTY 20250507 PIGSTY 20250507 PIGSTY 20250507
el10.x86_64 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108
el10.aarch64 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108
d12.x86_64 PIGSTY 20251108 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120
d12.aarch64 PIGSTY 20251108 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120
d13.x86_64 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108
d13.aarch64 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108
u22.x86_64 PIGSTY 20251108 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120
u22.aarch64 PIGSTY 20251108 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120 PIGSTY 20250120
u24.x86_64 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108
u24.aarch64 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108
u26.x86_64 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108
u26.aarch64 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108 PIGSTY 20251108

Source

Repository

docs.omnigres.org/omni_var/variables/

pig build pkg omnigres;		# build rpm/deb

Install

Make sure PGDG and PIGSTY repo available:

pig repo add pgsql -u   # add both repo and update cache

Install this extension with pig:

pig install omnigres;		# install via package name, for the active PG version
pig install omni_var;		# install by extension name, for the current active PG version

pig install omni_var -v 18;   # install for PG 18
pig install omni_var -v 17;   # install for PG 17
pig install omni_var -v 16;   # install for PG 16
pig install omni_var -v 15;   # install for PG 15
pig install omni_var -v 14;   # install for PG 14

Create this extension with:

CREATE EXTENSION omni_var;

Usage

omni_var: Scoped variables

The omni_var extension provides typed variables with transaction, session, and statement scopes.

Set Variables 

SELECT omni_var.set('my_var', true);              -- transaction scope
SELECT omni_var.set_session('my_var', true);       -- session scope
SELECT omni_var.set_statement('my_var', true);     -- statement scope

For explicit typing:

SELECT omni_var.set('text_var', 'value'::text);

Get Variables 

SELECT omni_var.get('my_var', false);              -- transaction scope, default=false
SELECT omni_var.get_session('my_var', false);       -- session scope
SELECT omni_var.get_statement('my_var', false);     -- statement scope

The default value serves dual purposes: returned when the variable is not found, and its type specifies the expected return type.

Behavior

  • If a variable is explicitly set to null, get returns null (not the default)
  • Mismatched type specifications raise errors: ERROR: type mismatch DETAIL: expected integer, got boolean
  • Transaction-scoped variables are bound by the enclosing transaction lifetime
  • Session variables persist throughout the session duration