[shardingsphere] branch master updated: support select '' as a from order (#6542)

[panjuan]

This is an automated email from the ASF dual-hosted git repository.

panjuan pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/shardingsphere.git


The following commit(s) were added to refs/heads/master by this push:
     new 957bb29  support select '' as a from order (#6542)
957bb29 is described below

commit 957bb295173b40c0a73a78c5cdbfbb0a6638997c
Author: cmonkey <42.codemon...@gmail.com>
AuthorDate: Fri Jul 31 16:28:33 2020 +0800

    support select '' as a from order (#6542)
---
 .../java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtil.java    | 3 +++
 .../org/apache/shardingsphere/sql/parser/sql/util/SQLUtilTest.java     | 1 +
 2 files changed, 4 insertions(+)

diff --git 
a/shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/main/java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtil.java
 
b/shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/main/java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtil.java
index 0c2c979..bd60e6b 100644
--- 
a/shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/main/java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtil.java
+++ 
b/shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/main/java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtil.java
@@ -95,6 +95,9 @@ public final class SQLUtil {
     
     private static int getParenthesesOffset(final String value) {
         int result = 0;
+        if (Strings.isNullOrEmpty(value)) {
+            return result;
+        }
         while (Paren.PARENTHESES.getLeftParen() == value.charAt(result)) {
             result++;
         }
diff --git 
a/shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/test/java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtilTest.java
 
b/shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/test/java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtilTest.java
index ac6988a..9d761ba 100644
--- 
a/shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/test/java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtilTest.java
+++ 
b/shardingsphere-sql-parser/shardingsphere-sql-parser-statement/src/test/java/org/apache/shardingsphere/sql/parser/sql/util/SQLUtilTest.java
@@ -88,5 +88,6 @@ public final class SQLUtilTest {
     @Test
     public void assertGetExpressionWithoutOutsideParentheses() {
         assertThat(SQLUtil.getExpressionWithoutOutsideParentheses("((a + 
b*c))"), is("a + b*c"));
+        assertThat(SQLUtil.getExpressionWithoutOutsideParentheses(""), is(""));
     }
 }