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Moderne licensed

Find correlated aggregate subqueries in WHERE

Recipe IDorg.openrewrite.sql.antipattern.FindCorrelatedAggregateSubquery
Artifactorg.openrewrite.recipe:rewrite-sql

A scalar subquery that computes an aggregate like MAX while referencing the outer query runs once per outer row on engines that cannot decorrelate it. A window function or a join to a pre-aggregated derived table computes every group in a single pass. Uncorrelated aggregate subqueries and EXISTS or IN subqueries are not flagged.

Single recipeProprietary

Usage

This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe org.openrewrite.sql.antipattern.FindCorrelatedAggregateSubquery

If the recipe isn’t available locally, install it with:

mod config recipes jar install org.openrewrite.recipe:rewrite-sql:2.14.1

Data tables

Structured output this recipe can produce.

  • SQL anti-patternsSQL statements matching performance anti-pattern rules.org.openrewrite.sql.table.SqlAntiPatterns
  • Source files that had resultsSource files that were modified by the recipe run.org.openrewrite.table.SourcesFileResults
  • Source files that had search resultsSearch results that were found during the recipe run.org.openrewrite.table.SearchResults
  • Source files that errored on a recipeThe details of all errors produced by a recipe run.org.openrewrite.table.SourcesFileErrors
  • Recipe performanceStatistics used in analyzing the performance of recipes.org.openrewrite.table.RecipeRunStats