Release Notes
- v3.1
- v3.0
- v2.5
- v2.4
- v2.3
- v2.2
- v2.1
- v2.0
- v1.19

Introduction
Quick Start
Table Design
Data Loading
Data Export
Using StarRocks
Reference
- SQL Reference
- Function Reference
  - Date Functions
  - Geographic Functions
  - String Functions
  - Aggregation Functions
  - Bitmap Functions
  - Array Functions
  - cast function
  - hash function
  - Crytographic Functions
    - md5
    - sha2
  - Math Functions
    - RAND
    - square
  - Utility Functions
    - uuid
    - uuid_numeric
- System variables
- Error code
- System limits
Administration
- Build in Docker
- Manage a cluster
- Configuration
- Scale In and Out
- Backup and Restore
- Data Recovery
  - Data Recovery
  - Restore FEs
- Replica
- Query Planning
- Profiling
- Monitor and Alert
- User Privilege
- Authentication
- Resource Management
FAQ
- Deployment
- Data Migration
  - Data Ingestion
  - Data Export
- SQL
- Others FAQs
Benchmark
- SSB Benchmark
- TPC-H Benchmark

Developers
- Contribute to StarRocks
- Code Style Guides
  - protobuf style guides
  - thrift style guides
- Use the debuginfo file for debugging
- Development Environment
- Trace Tools
  - Trace

Edit

instr

description

Syntax

INT instr(VARCHAR str, VARCHAR substr)

This function returns the position where str first appeared in substr (start counting from 1 and measured in characters). If str is not found in substr, then this function will return 0.

example

MySQL > select instr("abc", "b");
+-------------------+
| instr('abc', 'b') |
+-------------------+
|                 2 |
+-------------------+

MySQL > select instr("abc", "d");
+-------------------+
| instr('abc', 'd') |
+-------------------+
|                 0 |
+-------------------+

keyword

INSTR

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instr