don't cause stackoverflow in whereWithConditions/whereWithOrConditions #328
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Actually we don't need another expression type, simply refactoring the public inline fun Query.whereWithConditions(block: (MutableList<ColumnDeclaring<Boolean>>) -> Unit): Query {
var conditions: List<ColumnDeclaring<Boolean>> = ArrayList<ColumnDeclaring<Boolean>>().apply(block)
if (conditions.isEmpty()) {
return this
} else {
while (conditions.size > 1) {
conditions = conditions.chunked(2) { chunk ->
if (chunk.size == 2) chunk[0] and chunk[1] else chunk[0]
}
}
return this.where { conditions[0] }
}
} |
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I've updated the PR with your version. |
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Changes
whereWithConditionsandwhereWithOrConditionsso they don't cause stack overflows.This is done by introducing a new expression type:
VarargsExpression.VarargsExpressionwraps a collection ofColumnDeclaring<Boolean>. On output it wraps eachColumnDeclaring<Boolean>in parenthesis and joins them together with the operator. For code like a list of(t.id eq 1) and (t.departmentId eq 100), the resulting SQL looks like:This SQL is different than what was built before. Previously
whereWithConditions/whereWithOrConditionstreatedandandoras purely binary operators, nesting subsequent expressions in increasingly deep parenthesis. SQL allows us to skip the nesting which this takes advantage of.Fixes #327