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4.1
4.1
  • Developer Documentation
  • Install HarperDB
    • On Linux
  • Getting Started
  • Full API Documentation
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    • Log In & Password Reset
    • Resources (Marketplace, Drivers, Tutorials, & Example Code)
    • Organizations
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    • Query Instance Data
    • Manage Schemas / Browse Data
    • Manage Charts
    • Manage Clustering
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    • Manage Instance Roles
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    • Enable Mixed Content
  • HarperDB Cloud
    • IOPS Impact on Performance
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    • Verizon 5G Wavelength
  • Security
    • JWT Authentication
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    • Configuration
    • Users & Roles
  • Clustering
    • Requirements and Definitions
    • Creating A Cluster User
    • Naming A Node
    • Enabling Clustering
    • Establishing Routes
    • Subscription Overview
    • Managing Subscriptions
    • Things Worth Knowing
  • Custom Functions
    • Requirements and Definitions
    • Create a Project
    • Define Routes
    • Define Helpers
    • Host A Static Web UI
    • Using NPM and GIT
    • Custom Functions Operations
    • Restarting the Server
    • Debugging a Custom Function
    • Custom Functions Templates
    • Example Projects
  • Add-ons and SDKs
    • Google Data Studio
  • SQL Guide
    • SQL Features Matrix
    • Insert
    • Update
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    • Select
    • Joins
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    • SQL Reserved Word
    • SQL Functions
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      • geoArea
      • geoLength
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      • geoNear
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      • geoEqual
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      • geoConvert
  • HarperDB CLI
  • Configuration File
  • Logging
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  • Jobs
  • Upgrade a HarperDB Instance
  • Reference
    • Storage Algorithm
    • Dynamic Schema
    • Data Types
    • Content Types/Data Formats
    • HarperDB Headers
    • HarperDB Limits
  • Support
  • Release Notes
    • HarperDB Tucker (Version 4)
      • 4.1.0
      • 4.0.6
      • 4.0.5
      • 4.0.4
      • 4.0.3
      • 4.0.2
      • 4.0.1
      • 4.0.0
    • HarperDB Monkey (Version 3)
      • 3.3.0
      • 3.2.1
      • 3.2.0
      • 3.1.5
      • 3.1.4
      • 3.1.3
      • 3.1.2
      • 3.1.1
      • 3.1.0
      • 3.0.0
    • HarperDB Penny (Version 2)
      • 2.3.1
      • 2.3.0
      • 2.2.3
      • 2.2.2
      • 2.2.0
      • 2.1.1
    • HarperDB Alby (Version 1)
      • 1.3.1
      • 1.3.0
      • 1.2.0
      • 1.1.0
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  • Schema Naming Restrictions
  • Table Limitations
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  1. Reference

HarperDB Limits

This document outlines limitations of HarperDB.

Schema Naming Restrictions

Case Sensitivity

HarperDB schema metadata (schema names, table names, and attribute/column names) are case sensitive. Meaning schemas, tables, and attributes can differ only by the case of their characters.

Restrictions on Schema Metadata Names

HarperDB schema metadata (schema names, table names, and attribute names) cannot contain the following UTF-8 characters:

/`¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ

Additionally, they cannot contain the first 31 non-printing characters. Spaces are allowed, but not recommended as best practice. The regular expression used to verify a name is valid is:

^[\x20-\x2E|\x30-\x5F|\x61-\x7E]*$

Table Limitations

Attribute Maximum

HarperDB limits number of attributes to 10,000 per table.

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Last updated 1 year ago