--- title: All Your GUCs in a Row: escape_string_warning | daily.dev description: A deep dive into PostgreSQL's `escape_string_warning` GUC parameter, which has been on by default for ~20 years but rarely fires on modern setups. The post... canonical: https://daily.dev/posts/all-your-gucs-in-a-row-escape-string-warning-0dverkc5l twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: All Your GUCs in a Row: escape_string_warning | daily.dev og:description: A deep dive into PostgreSQL's `escape_string_warning` GUC parameter, which has been on by default for ~20 years but rarely fires on modern setups. The post... og:url: https://daily.dev/posts/all-your-gucs-in-a-row-escape-string-warning-0dverkc5l og:image: https://api.daily.dev/og/posts/0DvErkc5l.png og:image:alt: All Your GUCs in a Row: escape_string_warning og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # All Your GUCs in a Row: escape_string_warning **[Planet PostgreSQL](https://daily.dev/sources/planet-postgresql)** · 3 min read · 0 upvotes · 0 comments ## Summary A deep dive into PostgreSQL's `escape_string_warning` GUC parameter, which has been on by default for ~20 years but rarely fires on modern setups. The post explains its historical purpose: detecting backslash escape processing in ordinary string literals when `standard_conforming_strings` is off — a behavior that was a SQL injection vector in certain client encodings. Since PostgreSQL 9.1 flipped `standard_conforming_strings` to on by default, the warning is silent under normal conditions. If it does fire today, it signals a real misconfiguration — something in the stack has turned `standard_conforming_strings` off, re-exposing the old injection-prone behavior. The recommendation is to leave the warning enabled as a low-cost tripwire. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [All Your GUCs in a Row: event\_triggers](https://daily.dev/posts/all-your-gucs-in-a-row-event-triggers-2eqdc3xmw) · Planet PostgreSQL · 1 upvotes · 0 comments - [All Your GUCs in a Row: exit\_on\_error](https://daily.dev/posts/all-your-gucs-in-a-row-exit-on-error-mgewbgoja) · Planet PostgreSQL · 4 upvotes · 0 comments - [All Your GUCs in a Row: log\_min\_messages, log\_min\_error\_statement, and log\_error\_verbosity](https://daily.dev/posts/all-your-gucs-in-a-row-log-min-messages-log-min-error-statement-and-log-error-verbosity-vgxt2wbsf) · Planet PostgreSQL · 0 upvotes · 0 comments - [All Your GUCs in a Row: constraint\_exclusion](https://daily.dev/posts/all-your-gucs-in-a-row-constraint-exclusion-thbwdhnen) · Planet PostgreSQL · 13 upvotes · 0 comments --- Tags: [#sql](https://daily.dev/tags/sql), [#postgresql](https://daily.dev/tags/postgresql) [View this post on daily.dev](https://daily.dev/posts/all-your-gucs-in-a-row-escape-string-warning-0dverkc5l) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"All Your GUCs in a Row: escape_string_warning","url":"https://daily.dev/posts/all-your-gucs-in-a-row-escape-string-warning-0dverkc5l","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/all-your-gucs-in-a-row-escape-string-warning-0dverkc5l"},"datePublished":"2026-07-14T01:02:26.962Z","dateModified":"2026-07-14T01:04:46.790Z","description":"A deep dive into PostgreSQL's `escape_string_warning` GUC parameter, which has been on by default for ~20 years but rarely fires on modern setups. 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