Quick reference

Operation summary

Map operations

Operation	Description	Use case
MapPutOp	Put single key-value	Update one field
MapPutItemsOp	Put multiple key-values	Initialize or bulk update
MapGetByKeyOp	Get value by key	Most common: retrieve value
MapGetByKeyListOp	Get multiple values	Batch retrieval
MapGetByKeyRangeOp	Get by key range	Range queries
MapIncrementOp	Increment value	Counters, scores
MapDecrementOp	Decrement value	Inventory, counters
MapRemoveByKeyOp	Remove by key	Delete field
MapSizeOp	Get map size	Count items

List operations

Operation	Description	Use case
ListAppendOp	Append items	Add to end
ListInsertOp	Insert at index	Add at position
ListGetOp	Get by index	Retrieve item
ListGetRangeOp	Get range	Get multiple items
ListPopOp	Pop item	Queue processing
ListRemoveOp	Remove by index	Delete item
ListSizeOp	Get list size	Count items

Return type quick reference

Map return types

• VALUE: The actual value (most common)
• KEY: The key itself
• KEY_VALUE: Both key and value as MapPair
• INDEX: Index position (ordered maps)
• RANK: Rank by value
• COUNT: Number of items (1 or 0)
• EXISTS: Boolean existence check

List return types

• VALUE: The actual value
• INDEX: Index position(s)
• RANK: Rank by value
• COUNT: Number of items
• EXISTS: Boolean existence check

Context helper functions

The following are commonly used context helper functions for navigating nested CDT structures. There are additional helper functions available beyond these basic ones:

• CtxMapKey(key): Navigate to map by key
• CtxListIndex(index): Navigate to list by index
• CtxMapRank(rank): Navigate to map by rank
• CtxListRank(rank): Navigate to list by rank

For a complete list of all available context helper functions, refer to the API documentation.