SqlBuilder.selectSetDistinct

void selectSetDistinct(bool distinct, gda.types.SqlBuilderId exprId)

Defines (if distinct is true) or removes (if distinct is false) a DISTINCT clause for a SELECT statement.

If distinct is true, then the ID of an expression can be specified as the expr_id argument: if not 0, this is the expression used to apply the DISTINCT clause on (the resuting SQL will then usually be "... DISTINCT ON <expression>...").

Parameters

`distinct`	set to true to have the DISTINCT requirement
`exprId`	the ID of the DISTINCT ON expression, or `0` if no expression is to be used. It is ignored if distinct is false.