🧩 BigDB

An extension for MIT App Inventor 2.
BigDB - Advanced key-value storage with TTL, metadata, multi-table support, encryption, and more
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Built by Sarthak Gupta

📝 Specifications

📦 Package: com.bigdb 💾 Size: 33.66 KB ⚙️ Version: 1.0 📱 Minimum API Level: 7 📅 Updated On: [date=2025-05-25 timezone="Asia/Calcutta"] 💻 Built & documented using: FAST-CLI v2.8.1

Events:

BigDB has total 4 events.

💛 Got

Fires when a value is retrieved

Parameter	Type
queryId	text
value	text

💛 KeyList

Fires when a key list is returned

Parameter	Type
queryId	text
keys	any

💛 DataChanged

Fires when data changes in the current table

💛 ErrorOccurred

Fires when an error occurs

Parameter	Type
message	text

Methods:

BigDB has total 28 methods.

💜 SetPassword

Set database encryption password (PRAGMA key)

Parameter	Type
pwd	text

💜 RemovePassword

Remove encryption (PRAGMA rekey to empty)

💜 IsEncrypted

Check if database is encrypted

💜 Store

Store a value for a key with optional TTL and metadata

Parameter	Type
key	text
value	text
useTTL	boolean
ttlSeconds	number
metadata	text

💜 Get

Get the value for a key asynchronously

Parameter	Type
key	text
queryId	text

💜 Delete

Delete a key

Parameter	Type
key	text

💜 Clear

Clear all data in the current table

💜 RenameKey

Rename a key

Parameter	Type
oldKey	text
newKey	text

💜 BulkStore

Store multiple key-value pairs

Parameter	Type
keys	list
values	list

💜 BulkDelete

Delete multiple keys

Parameter	Type
keys	list

💜 Keys

List all keys in the current table asynchronously

Parameter	Type
queryId	text

💜 Exists

Check if a key exists

Parameter	Type
key	text

💜 GetRecord

Get full record as JSON asynchronously

Parameter	Type
key	text
queryId	text

💜 FindByMetadata

Find keys by metadata substring asynchronously

Parameter	Type
query	text
queryId	text

💜 Expire

Set expiry time in seconds for a key

Parameter	Type
key	text
seconds	number

💜 SetMetadata

Set metadata for a key

Parameter	Type
key	text
metadata	text

💜 GetMetadata

Get metadata for a key

Parameter	Type
key	text

💜 GetTTL

Get remaining TTL in seconds for a key (0 if none or expired)

Parameter	Type
key	text

💜 PurgeExpired

Purge expired keys from the current table

💜 ExportCSV

Export current table as CSV to the specified file path. If filePath is empty, uses the app's external files directory.

Parameter	Type
filePath	text

💜 ImportCSV

Import data into current table from CSV

Parameter	Type
filename	text

💜 ExportJSON

Export current table as JSON string

💜 ImportJSON

Import data into current table from JSON

Parameter	Type
json	text

💜 Count

Get total record count in current table

💜 DBSize

Get database file size in bytes

💜 ListTables

List all tables in database

💜 Watch

Watch changes to a key in the current table

Parameter	Type
key	text
queryId	text

💜 Unwatch

Stop watching changes to a key

Parameter	Type
key	text
queryId	text

Setter:

BigDB has total 1 setter property.

💚 SetTable

Set the current table to operate on

• Input type: text