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Code Issues Releases Wiki Activity

improved sql parser.

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This commit is contained in:
wenshao
2017-08-31 16:34:15 +08:00
parent 947059f715
commit e0b0cca579
17 changed files with 358 additions and 92 deletions
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src/main/java/com/alibaba/druid/sql/parser/Lexer.java
+33
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@@ -40,6 +40,7 @@ import java.util.Arrays;
import java.util.List;
import com.alibaba.druid.sql.ast.expr.SQLNumberExpr;
import com.alibaba.druid.sql.dialect.mysql.parser.MySqlLexer;
import com.alibaba.druid.util.FnvHash;
import com.alibaba.druid.util.JdbcConstants;
import com.alibaba.druid.util.StringUtils;
@@ -1321,6 +1322,38 @@ public class Lexer {
final char first = ch;
if (ch == '`') {
mark = pos;
bufPos = 1;
char ch;
int startPos = pos + 1;
int quoteIndex = text.indexOf('`', startPos);
if (quoteIndex == -1) {
throw new ParserException("illegal identifier. " + info());
}
hash_lower = 0xcbf29ce484222325L;
hash = 0xcbf29ce484222325L;
for (int i = startPos; i < quoteIndex; ++i) {
ch = text.charAt(i);
hash_lower ^= ((ch >= 'A' && ch <= 'Z') ? (ch + 32) : ch);
hash_lower *= 0x100000001b3L;
hash ^= ch;
hash *= 0x100000001b3L;
}
stringVal = MySqlLexer.quoteTable.addSymbol(text, pos, quoteIndex + 1 - pos, hash);
//stringVal = text.substring(mark, pos);
pos = quoteIndex + 1;
this.ch = charAt(pos);
token = Token.IDENTIFIER;
return;
}
final boolean firstFlag = isFirstIdentifierChar(first);
if (!firstFlag) {
throw new ParserException("illegal identifier. " + info());