If Not Exists
From Dontopedia, the open, paraconsistent wiki. (Last updated 2026-06-10.)
If Not Exists has 7 facts recorded in Dontopedia across 3 references, with 2 live disagreements.
Mostly:rdf:type(3), purpose(2), provides idempotency(1)
Maturity scale
raw canonical shape-checked rule-derived certifiedInbound mentions (5)
Other subjects in dontopedia point AT this entity as a value. These are inverse relationships — e.g. "X motherOf this subject" — and answer questions the forward facts can't. Grouped by predicate.
includesClauseIncludes Clause(2)
- Composite Index Creation
ex:composite-index-creation - Idx Model Id Version
ex:idx_model_id_version
usesSafetyMechanismUses Safety Mechanism(2)
- Index Creation
ex:index-creation - Table Creation
ex:table-creation
syntaxFeatureSyntax Feature(1)
- Composite Index Creation
ex:composite-index-creation
Other facts (7)
The long tail: predicates that appear too rarely to warrant their own section. Filter or scroll to find a specific one. Each row links to its source.
| Predicate | Value | Ref |
|---|---|---|
| Rdf:type | Sql Conditional | [1] |
| Rdf:type | Database Safety Mechanism | [2] |
| Rdf:type | Sql Clause | [3] |
| Purpose | Prevent Duplicate Index | [3] |
| Purpose | Safety Check | [3] |
| Provides Idempotency | true | [1] |
| Inverse:syntax Feature | Composite Index Creation | [3] |
Timeline
Timeline axis is valid_time — when each source says the fact was true in the world, not when Dontopedia learned about it. Retracted rows are kept for provenance; coloured stripes indicate the context kind.
References (3)
ctx:claims/beam/c613f544-8a83-419c-8698-67fbeea99401- full textbeam-chunktext/plain1 KB
doc:beam/c613f544-8a83-419c-8698-67fbeea99401Show excerpt
Create a system to track the status of each risk and generate reports. Here's an example using Python and a simple SQLite database: ```python import sqlite3 from datetime import datetime # Connect to the SQLite database conn = sqlite3.con…
ctx:claims/beam/4da5e6e6-6f55-4c0d-b94f-19f0ca28767bctx:claims/beam/57f508a6-cf50-41ae-8787-39c9218ac525
See also
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