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morrysnow pushed a commit to branch 2.1_39399
in repository https://gitbox.apache.org/repos/asf/doris.git
commit 5f7552d91da53fe8a5a56c55acdf54d7bf77afd2
Author: morrySnow <101034200+morrys...@users.noreply.github.com>
AuthorDate: Thu Aug 15 20:33:50 2024 +0800
[opt](Nereids) support parse sql with semicolon at beginning (#39399)
pick from master #39399
For statement with semicolon at beginning like: ;SELECT 1; MySQL could
not parse it, but legacy planner could
---
.../antlr4/org/apache/doris/nereids/DorisParser.g4 | 4 ++--
.../nereids_syntax_p0/test_semicolon_at_begin.groovy | 20 ++++++++++++++++++++
2 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
b/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
index 7b56e1479c4..20f528a933d 100644
--- a/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
+++ b/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
@@ -26,11 +26,11 @@ options { tokenVocab = DorisLexer; }
}
multiStatements
- : statement (SEMICOLON+ statement)* SEMICOLON* EOF
+ : SEMICOLON* statement? (SEMICOLON+ statement)* SEMICOLON* EOF
;
singleStatement
- : statement SEMICOLON* EOF
+ : SEMICOLON* statement? SEMICOLON* EOF
;
statement
diff --git
a/regression-test/suites/nereids_syntax_p0/test_semicolon_at_begin.groovy
b/regression-test/suites/nereids_syntax_p0/test_semicolon_at_begin.groovy
new file mode 100644
index 00000000000..48ba900bb23
--- /dev/null
+++ b/regression-test/suites/nereids_syntax_p0/test_semicolon_at_begin.groovy
@@ -0,0 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+suite("test_semicolon_at_begin") {
+ sql ";;;select 1"
+}
\ No newline at end of file
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