/**
* This method logs the reason for which we cannot apply the rewrite optimization.
*
* @return
*/
boolean checkIfAllRewriteCriteriaIsMet(RewriteCanApplyCtx canApplyCtx) {
if (canApplyCtx.getAggFuncCnt() > 1) {
LOG.debug("More than 1 agg funcs: " + "Not supported by " + getName() + " optimization.");
return false;
}
if (canApplyCtx.isAggFuncIsNotCount()) {
LOG.debug(
"Agg func other than count is " + "not supported by " + getName() + " optimization.");
return false;
}
if (canApplyCtx.isCountOnAllCols()) {
LOG.debug(
"Currently count function needs group by on key columns. This is a count(*) case.,"
+ "Cannot apply this "
+ getName()
+ " optimization.");
return false;
}
if (canApplyCtx.isCountOfOne()) {
LOG.debug(
"Currently count function needs group by on key columns. This is a count(1) case.,"
+ "Cannot apply this "
+ getName()
+ " optimization.");
return false;
}
if (canApplyCtx.isAggFuncColsFetchException()) {
LOG.debug(
"Got exception while locating child col refs "
+ "of agg func, skipping "
+ getName()
+ " optimization.");
return false;
}
if (canApplyCtx.isWhrClauseColsFetchException()) {
LOG.debug(
"Got exception while locating child col refs for where clause, "
+ "skipping "
+ getName()
+ " optimization.");
return false;
}
if (canApplyCtx.isSelClauseColsFetchException()) {
LOG.debug(
"Got exception while locating child col refs for select list, "
+ "skipping "
+ getName()
+ " optimization.");
return false;
}
if (canApplyCtx.isGbyKeysFetchException()) {
LOG.debug(
"Got exception while locating child col refs for GroupBy key, "
+ "skipping "
+ getName()
+ " optimization.");
return false;
}
return true;
}
