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# Single Connection and Multiple Connection Functions - VTS

Use single connection functions if the script connects to only one VTS (Virtual Table Server). See Virtual Table Server functions (JavaScript)

Use multiple connection functions if the script connects to more than one server. See Virtual Table Server Functions for Multiple Connections (vtc)

Do not mix single connection functions and multiple connection functions in a script.

Most functions can be used in C language, C#, and Java scripts. See the individual function references for details.

Equivalent single connection and multiple connection functions
Multiple connection function | Single connection function
--- | ---
vtc.clearColumn | lrvtc.clearColumn
vtc.clearMessage | lrvtc.clearMessage
vtc.clearRow | lrvtc.clearRow
vtc.columnSize | lrvtc.columnSize
vtc.connect | lrvtc.connect
vtc.createColumn | lrvtc.createColumn
vtc.disconnect | lrvtc.disconnect
vtc.dropIndex | lrvtc.dropIndex
vtc.ensureIndex | lrvtc.ensureIndex
vtc.increment | lrvtc.increment
vtc.queryColumn | lrvtc.queryColumn
vtc.queryRow | lrvtc.queryRow
vtc.retrieveMessage | lrvtc.retrieveMessage
vtc.retrieveMessages1 | lrvtc.retrieveMessages1
vtc.retrieveRow | lrvtc.retrieveRow
vtc.sendIfUnique | lrvtc.sendIfUnique
vtc.sendMessage | lrvtc.sendMessage
vtc.sendRow1 | lrvtc.sendRow1
vtc.updateMessage | lrvtc.updateMessage
vtc.updateMessageIfequals | lrvtc.updateMessageIfequals
vtc.updateRow1 | lrvtc.updateRow1

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