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Merge pull request #12653 from zhang2014/feature/truncate_without_table

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ISSUES-4006 support truncate table without table keyword
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alexey-milovidov 2020-07-22 21:43:04 +03:00 committed by GitHub
commit f75c242491
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3 changed files with 18 additions and 3 deletions
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6
src/Parsers/ParserDropQuery.cpp
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@ -11,7 +11,7 @@ namespace DB
namespace
{
bool parseDropQuery(IParser::Pos & pos, ASTPtr & node, Expected & expected)
bool parseDropQuery(IParser::Pos & pos, ASTPtr & node, Expected & expected, bool optional_table_keyword = false)
{
ParserKeyword s_temporary("TEMPORARY");
ParserKeyword s_table("TABLE");
@ -55,7 +55,7 @@ bool parseDropQuery(IParser::Pos & pos, ASTPtr & node, Expected & expected)
else if (s_temporary.ignore(pos, expected))
temporary = true;
if (!is_view && !is_dictionary && !s_table.ignore(pos, expected))
if (!is_view && !is_dictionary && (!s_table.ignore(pos, expected) && !optional_table_keyword))
{
return false;
}
@ -114,7 +114,7 @@ bool parseDetachQuery(IParser::Pos & pos, ASTPtr & node, Expected & expected)
bool parseTruncateQuery(IParser::Pos & pos, ASTPtr & node, Expected & expected)
{
if (parseDropQuery(pos, node, expected))
if (parseDropQuery(pos, node, expected, true))
{
auto * drop_query = node->as<ASTDropQuery>();
drop_query->kind = ASTDropQuery::Kind::Truncate;

3
tests/queries/0_stateless/01413_truncate_without_table_keyword.reference Normal file
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@ -0,0 +1,3 @@
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12
tests/queries/0_stateless/01413_truncate_without_table_keyword.sql Normal file
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@ -0,0 +1,12 @@
DROP TABLE IF EXISTS truncate_test;
CREATE TABLE truncate_test(uint8 UInt8) ENGINE = Log;
INSERT INTO truncate_test VALUES(1), (2), (3);
SELECT * FROM truncate_test ORDER BY uint8;
TRUNCATE truncate_test;
SELECT * FROM truncate_test ORDER BY uint8;