/** * Adds a child to this expression. * * @param child child to add */ public void addChild(SargExpr child) { assert (child.getDataType() == dataType); if (setOp == SargSetOperator.COMPLEMENT) { assert (children.isEmpty()); } children.add(child); }
/** Reconstructs a rex predicate from a list of SargExprs which will be AND'ed together. */ private void recomposeConjunction() { for (int i = 0; i < sargBindingList.size(); i++) { final SargBinding currBinding = sargBindingList.get(i); final RexInputRef currRef = currBinding.getInputRef(); SargExpr currSargExpr = currBinding.getExpr(); RexNode currAndNode = sarg2RexMap.get(currSargExpr); // don't need this anymore // will be have new mapping put back if currSargExpr remain // unchanged. sarg2RexMap.remove(currSargExpr); boolean recomp = false; // search the rest of the list to find SargExpr on the same col. ListIterator<SargBinding> iter = sargBindingList.listIterator(i + 1); while (iter.hasNext()) { final SargBinding nextBinding = iter.next(); final RexInputRef nextRef = nextBinding.getInputRef(); final SargExpr nextSargExpr = nextBinding.getExpr(); if (nextRef.getIndex() == currRef.getIndex()) { // build new SargExpr SargSetExpr expr = factory.newSetExpr(currSargExpr.getDataType(), SargSetOperator.INTERSECTION); expr.addChild(currSargExpr); expr.addChild(nextSargExpr); // build new RexNode currAndNode = factory .getRexBuilder() .makeCall( SqlStdOperatorTable.andOperator, currAndNode, sarg2RexMap.get(nextSargExpr)); currSargExpr = expr; sarg2RexMap.remove(nextSargExpr); iter.remove(); recomp = true; } } if (recomp) { assert !simpleMode; if (!testDynamicParamSupport(currSargExpr)) { // Oops, we can't actually support the conjunction we // recomposed. Toss it. (We could do a better job by at // least using part of it, but the effort might be better // spent on implementing deferred expression evaluation.) nonSargFilterList.add(currAndNode); sargBindingList.remove(i); continue; } } if (recomp) { SargBinding newBinding = new SargBinding(currSargExpr, currRef); sargBindingList.remove(i); sargBindingList.add(i, newBinding); } sarg2RexMap.put(currSargExpr, currAndNode); } }