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query.extend.from(), query.extend.from.in.zoom()
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By patvdv at 26 Feb 2008 - 21:57
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query.extend.from(), query.extend.from.in.zoom()
Syntax
void query.extend.from( string extension_string [, mode] )
void query.extend.from.in.zoom( string extension_string )
Description
Use this to construct a query extension for the FROM clause of a database query. Use query.extend.from() for non-zoom sessions. Use query.extend.from.in.zoom() for defining query filters for zoom sessions.
Arguments
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extension_string
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A string containing the names of the fields to be included in the FROM statement. Use commas [,] to separate the field names.
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mode
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This optional argument can have one of the following values:
- EXTEND_OVERWRITE : replaces any existing query extension (this is the default mode)
- EXTEND_APPEND : appends this extension to the existing extension
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Context
4GL library functions.
You can use query.extend.from() in the before.program section of UI scripts and in the before.open.object() hook of DAL scripts. You can use query.extend.from.in.zoom() only in the selection.filter section of UI scripts.
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