Wiki / Operators / Object and transaction identifiers

=(tid,tid)

equal

Reading PostgreSQL 18.6.

Description

equal

Left operand: tid
Right operand: tid
Result type: bool
Implementing function: tideq(tid,tid)
Operator kind: Binary
Hash join candidate: yes
Merge join candidate: yes

Usage

=(tid,tid) → bool

Catalog interpretation

The catalog pg_operator stores information about operators. See CREATE OPERATOR and Section 36.14 for more information.

Declared operator-family membership

Index AM	Family	Strategy	Purpose
B-tree	tid_ops	3	search
Hash	tid_ops	1	search
BRIN	tid_minmax_ops	3	search
BRIN	tid_bloom_ops	1	search
BRIN	tid_minmax_multi_ops	3	search

Related entries

Documentation and source

Source build

Version: 18.6
Build: https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2
Source fingerprint: 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f

Compare versions

PostgreSQL 11 → 12: changed.

--- PostgreSQL 11
+++ PostgreSQL 12
@@ -19,12 +19,22 @@
       "right_type": "tid",
       "sort_family": "",
       "strategy": "3"
+    },
+    {
+      "family": "tid_ops",
+      "left_type": "tid",
+      "method": "hash",
+      "operator": "=(tid,tid)",
+      "purpose": "search",
+      "right_type": "tid",
+      "sort_family": "",
+      "strategy": "1"
     }
   ],
   "operator": {
     "commutator": "=(tid,tid)",
     "function": "tideq(tid,tid)",
-    "hash_join": "f",
+    "hash_join": "t",
     "kind": "b",
     "left_type": "tid",
     "merge_join": "t",

Compares recorded interfaces and attributes. Source fingerprints and build metadata are excluded; an absent sample is not proof of the introduction or removal release.

Related entries

Export JSON · Back to Operators · Recorded in PostgreSQL 10 through 20; the first sample is not necessarily its introduction.