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PR #24810

Optimize dynamic partition pruning in Cost-Based Optimizer

branch: feat/cbo-pruning → target: prestodb/presto:master

1. Branch & Code Changes

Modified 4 files in presto-main/sql/planner

2. Code Style & Spotless Check

Passed Checkstyle rules & Spotless code formatting

3. Automated CI Test Suite

1,420 planner & unit tests passed across JDK 17 matrix

4. Maintainer Review & Merge MERGED

Approved and merged by maintainers into prestodb:master

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Follow this streamlined 3-step guide to configure your local developer environment, build the Presto distributed engine, and submit your first pull request.

zsh — step-1-fork-and-clone.sh

# 1. Fork prestodb/presto on GitHub, then clone your fork locally:

$ git clone https://github.com/<YOUR_USERNAME>/presto.git && cd presto

# 2. Configure the upstream official repository remote:

$ git remote add upstream https://github.com/prestodb/presto.git

# 3. Create your dedicated feature branch:

$ git checkout -b feat/optimizer-partition-pruning

✓ Switched to a new branch ‘feat/optimizer-partition-pruning’

# 1. Fast build the entire Presto project using the Maven wrapper (skipping unit tests):

$ ./mvnw clean install -DskipTests -T 2C

# 2. Or build only a specific module (e.g., Iceberg connector or Core Engine):

$ ./mvnw clean install -pl presto-iceberg -am -DskipTests

[INFO] ——————————————————-
[INFO] BUILD SUCCESS
[INFO] Total time: 01:14 min | Finished at: 2026-08-30T01:12:00Z

# 1. Run targeted unit tests for the specific module under test:

$ ./mvnw test -pl presto-main -Dtest=TestCostBasedOptimizer

# 2. Verify Checkstyle code standards compliance:

$ ./mvnw checkstyle:check

# 3. Commit your changes with a conventional commit message and push:

$ git commit -s -m “feat(optimizer): optimize dynamic partition pruning”

$ git push origin feat/optimizer-partition-pruning

✓ Running TestCostBasedOptimizer … PASSED (3.42s)
✓ Create a Pull Request on GitHub: https://github.com/prestodb/presto/pull/new/feat/optimizer-partition-pruning

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