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parser + ast

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This commit is contained in:
dmitrii 2019-04-18 11:24:06 +03:00
parent 7f93f9ad2f
commit 5d34b00487
3 changed files with 22 additions and 3 deletions
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2
dbms/src/Parsers/ASTSelectQuery.cpp
View File

@ -143,6 +143,8 @@ void ASTSelectQuery::formatImpl(const FormatSettings & s, FormatState & state, F
s.ostr << ", ";
}
limitLength()->formatImpl(s, state, frame);
if (limit_with_ties)
s.ostr << (s.hilite ? hilite_keyword : "") << s.nl_or_ws << indent_str << " WITH TIES" << (s.hilite ? hilite_none : "");
}
if (settings())

1
dbms/src/Parsers/ASTSelectQuery.h
View File

@ -41,6 +41,7 @@ public:
bool group_by_with_totals = false;
bool group_by_with_rollup = false;
bool group_by_with_cube = false;
bool limit_with_ties = false;
ASTPtr & refSelect() { return getExpression(Expression::SELECT); }
ASTPtr & refTables() { return getExpression(Expression::TABLES); }

22
dbms/src/Parsers/ParserSelectQuery.cpp
View File

@ -41,6 +41,7 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
ParserKeyword s_rollup("ROLLUP");
ParserKeyword s_cube("CUBE");
ParserKeyword s_top("TOP");
ParserKeyword s_with_ties("WITH TIES");
ParserKeyword s_offset("OFFSET");
ParserNotEmptyExpressionList exp_list(false);
@ -75,7 +76,7 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
}
}
/// SELECT [DISTINCT] [TOP N] expr list
/// SELECT [DISTINCT] [TOP N [WITH TIES]] expr list
{
if (!s_select.ignore(pos, expected))
return false;
@ -99,6 +100,9 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
if (!num.parse(pos, limit_length, expected))
return false;
}
if (s_with_ties.ignore(pos, expected))
select_query->limit_with_ties = true;
}
if (!exp_list_for_select_clause.parse(pos, select_expression_list, expected))
@ -180,7 +184,7 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
return false;
}
/// LIMIT length | LIMIT offset, length | LIMIT count BY expr-list
/// LIMIT length [WITH TIES] | LIMIT offset, length [WITH TIES] | LIMIT count BY expr-list
if (s_limit.ignore(pos, expected))
{
if (limit_length)
@ -196,7 +200,12 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
limit_offset = limit_length;
if (!exp_elem.parse(pos, limit_length, expected))
return false;
if (s_with_ties.ignore(pos, expected))
select_query->limit_with_ties = true;
}
else if (s_with_ties.ignore(pos, expected))
select_query->limit_with_ties = true;
else if (s_by.ignore(pos, expected))
{
limit_by_value = limit_length;
@ -212,7 +221,7 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
}
}
/// LIMIT length | LIMIT offset, length
/// LIMIT length [WITH TIES] | LIMIT offset, length [WITH TIES]
if (s_limit.ignore(pos, expected))
{
if (!limit_by_value || limit_length)
@ -229,8 +238,15 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
if (!exp_elem.parse(pos, limit_length, expected))
return false;
}
if (s_with_ties.ignore(pos, expected))
select_query->limit_with_ties = true;
}
// WITH TIES was used without ORDER BY
if (!order_expression_list && select_query->limit_with_ties)
return false;
/// SETTINGS key1 = value1, key2 = value2, ...
if (s_settings.ignore(pos, expected))
{