Julian Hyde created CALCITE-1290: ------------------------------------ Summary: When converting to CNF, fail if the expression exceeds a threshold Key: CALCITE-1290 URL: https://issues.apache.org/jira/browse/CALCITE-1290 Project: Calcite Issue Type: Bug Reporter: Julian Hyde Assignee: Julian Hyde
When converting to conjunctive normal form (CNF), fail if the expression exceeds a threshold. CNF can explode exponentially in the size of the input expression, but rarely does so in practice. Add a {{maxNodeCount}} parameter to {{RexUtil.toCnf}} and throw or return null if it is exceeded. I don't believe it is possible to predict the size of the CNF from the input expression (especially if there are duplicate terms) but I might be wrong. -- This message was sent by Atlassian JIRA (v6.3.4#6332)