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[#7171] Nested set operations in derived tables

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This commit is contained in:
lukaseder 2018-03-01 14:57:00 +01:00
parent 3d2e04b77c
commit 47fe7434b7
1 changed files with 12 additions and 16 deletions
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28
jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
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@ -3025,27 +3025,25 @@ final class ParserImpl implements Parser {
parse(ctx, ')');
}
else if (parseIf(ctx, '(')) {
// A table factor parenthesis can mark the beginning of any of:
// - A derived table: E.g. (select 1)
// - A derived table with nested set ops: E.g. ((select 1) union (select 2))
// - A values derived table: E.g. (values (1))
// - A joined table: E.g. ((a join b on p) right join c on q)
// - A combination of the above: E.g. ((a join (select 1) on p) right join (((select 1)) union (select 2)) on q)
if (peekKeyword(ctx, "SELECT")) {
result = table(parseSelect(ctx));
SelectQueryImpl<Record> select = parseSelect(ctx);
parse(ctx, ')');
result = table(parseQueryExpressionBody(ctx, null, null, select));
}
else if (peekKeyword(ctx, "VALUES")) {
result = parseTableValueConstructor(ctx);
parse(ctx, ')');
}
else {
int parens = 0;
while (parseIf(ctx, '('))
parens++;
result = parseJoinedTable(ctx);
while (parens --> 0)
parse(ctx, ')');
parse(ctx, ')');
return result;
}
}
else {
@ -3219,13 +3217,11 @@ final class ParserImpl implements Parser {
private static final Table<?> parseJoinedTable(ParserContext ctx) {
Table<?> result = parseTableFactor(ctx);
for (int i = 0;; i++) {
for (;;) {
Table<?> joined = parseJoinedTableIf(ctx, result);
if (joined == null)
if (i == 0)
ctx.unexpectedToken();
else
return result;
return result;
else
result = joined;
}