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In 4D version 21, the Is field number valid command, which has command number 1000 and is thread safe, returns a Boolean value indicating whether a specified field number corresponds to an existing field in a given table, allowing detection of field deletions that create gaps in the sequence of field numbers. It suppor... |
This information applies to 4D version 21. The Is table number valid command verifies the existence of a table in the database based on its number, returning a Boolean value of true if the table exists and false otherwise, which makes it particularly useful for detecting table deletions that leave gaps in the sequentia... |
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