Oracle Database 19c: SQL Tuning Workshop — Lesson 3: Indexes, SQL Rewrite, Bind Variables, Aggregation, and Workarea Tuning

Learning Objectives

• Explain the architecture, workflow, or business purpose behind B-tree, bitmap awareness, composite, function-based, and invisible indexes.
• Apply sargable predicates, subqueries, joins, aggregation, and set rewrites and bind peeking, adaptive cursor sharing, literals, and cursor proliferation in a controlled scenario.
• Validate outcomes and troubleshoot risks involving sort and hash workareas, TEMP spills, parallelism awareness, and validation.

Detailed Topics

• B-tree, bitmap awareness, composite, function-based, and invisible indexes
• sargable predicates, subqueries, joins, aggregation, and set rewrites
• bind peeking, adaptive cursor sharing, literals, and cursor proliferation
• sort and hash workareas, TEMP spills, parallelism awareness, and validation

Instructor Demonstration

Demonstrate B-tree, bitmap awareness, composite, function-based, and invisible indexes within a reporting query and transaction query tuned without sacrificing correctness, concurrency, or plan stability, then capture the exact configuration, command, transaction, report, model, query, code, or process evidence that proves the result for lesson 3.

Hands-On Exercise

Implement a controlled exercise covering sargable predicates, subqueries, joins, aggregation, and set rewrites and bind peeking, adaptive cursor sharing, literals, and cursor proliferation, then introduce and resolve an exception involving sort and hash workareas, TEMP spills, parallelism awareness, and validation while preserving before-and-after evidence.

1. Confirm the environment, identities, inputs, dependencies, risks, and expected outcome.
2. Complete the course-specific configuration, development, analysis, or process workflow.
3. Capture settings, commands, data, outputs, logs, reports, screenshots, calculations, or test results.
4. Compare the observed result with acceptance criteria and document corrective action.

Scenario Analysis

• Identify the technical or business decision that must be made.
• Compare valid approaches and their security, performance, reliability, cost, compliance, and support trade-offs.
• Define rollback, recovery, ownership, communication, and evidence requirements.

Troubleshooting Guidance

Diagnose issues across B-tree, bitmap awareness, composite, function-based, and invisible indexes, sargable predicates, subqueries, joins, aggregation, and set rewrites, bind peeking, adaptive cursor sharing, literals, and cursor proliferation, sort and hash workareas, TEMP spills, parallelism awareness, and validation without making an unverified production change. Separate symptoms from causes, gather evidence, test the smallest reversible correction, rerun validation, and record preventive action.

Validation Checklist

• The requirement, scope, inputs, dependencies, and expected result are documented.
• The result is reproducible and supported by course-specific evidence.
• Normal, boundary, failure, security, performance, and operational conditions are reviewed.
• Exceptions, rollback, ownership, and the next improvement priority are recorded.

Lesson Outcome

Learners can apply Indexes, SQL Rewrite, Bind Variables, Aggregation, and Workarea Tuning in a realistic Oracle Database 19c: SQL Tuning Workshop scenario and validate the result with documented evidence.