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[#5955] Support KEEP

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lukaseder 2017-04-14 13:23:59 +02:00
parent 0cc408f44e
commit fc35eb7f54
1 changed files with 21 additions and 4 deletions
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25
jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
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@ -3421,12 +3421,13 @@ class ParserImpl implements Parser {
private static final Field<?> parseAggregateFunctionIf(ParserContext ctx) {
AggregateFunction<?> agg;
WindowBeforeOverStep<?> over;
Object keep = null;
Field<?> result;
Condition filter;
over = agg = parseCountIf(ctx);
keep = over = agg = parseCountIf(ctx);
if (agg == null)
over = agg = parseGeneralSetFunctionIf(ctx);
keep = over = agg = parseGeneralSetFunctionIf(ctx);
if (agg == null)
over = agg = parseBinarySetFunctionIf(ctx);
if (agg == null)
@ -3435,7 +3436,24 @@ class ParserImpl implements Parser {
if (agg == null && over == null)
return null;
if (agg != null && parseKeywordIf(ctx, "FILTER")) {
if (keep != null && agg != null && parseKeywordIf(ctx, "KEEP")) {
boolean first;
parse(ctx, '(');
parseKeyword(ctx, "DENSE_RANK");
first = parseKeywordIf(ctx, "FIRST");
if (!first)
parseKeyword(ctx, "LAST");
parseKeyword(ctx, "ORDER BY");
List<SortField<?>> sort = parseSortSpecification(ctx);
parse(ctx, ')');
if (first)
result = over = agg.keepDenseRankFirstOrderBy(sort);
else
result = over = agg.keepDenseRankLastOrderBy(sort);
}
else if (agg != null && parseKeywordIf(ctx, "FILTER")) {
parse(ctx, '(');
parseKeyword(ctx, "WHERE");
filter = parseCondition(ctx);
@ -3448,7 +3466,6 @@ class ParserImpl implements Parser {
else
result = over;
// TODO parse WITHIN GROUP (ORDER BY) where applicable
if (parseKeywordIf(ctx, "OVER")) {
Object nameOrSpecification = parseWindowNameOrSpecification(ctx, agg != null);