[doris] branch master updated: [compatibility](Nereids) process escape in string literal (#14294)

[jakevin]

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


The following commit(s) were added to refs/heads/master by this push:
     new 7952bce03f [compatibility](Nereids) process escape in string literal 
(#14294)
7952bce03f is described below

commit 7952bce03fce89007419a1b87b9b8bd34549df16
Author: morrySnow <101034200+morrys...@users.noreply.github.com>
AuthorDate: Fri Nov 18 11:24:00 2022 +0800

    [compatibility](Nereids) process escape in string literal (#14294)
---
 .../doris/nereids/parser/LogicalPlanBuilder.java   | 44 ++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git 
a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
 
b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
index a94fe8755e..97770735e5 100644
--- 
a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
+++ 
b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
@@ -687,10 +687,54 @@ public class LogicalPlanBuilder extends 
DorisParserBaseVisitor<Object> {
                 .map(ParseTree::getText)
                 .map(str -> str.substring(1, str.length() - 1))
                 .reduce((s1, s2) -> s1 + s2)
+                .map(this::escapeBackSlash)
                 .orElse("");
         return new VarcharLiteral(s);
     }
 
+    private String escapeBackSlash(String str) {
+        StringBuilder sb = new StringBuilder();
+        int strLen = str.length();
+        for (int i = 0; i < strLen; ++i) {
+            char c = str.charAt(i);
+            if (c == '\\' && (i + 1) < strLen) {
+                switch (str.charAt(i + 1)) {
+                    case 'n':
+                        sb.append('\n');
+                        break;
+                    case 't':
+                        sb.append('\t');
+                        break;
+                    case 'r':
+                        sb.append('\r');
+                        break;
+                    case 'b':
+                        sb.append('\b');
+                        break;
+                    case '0':
+                        sb.append('\0'); // Ascii null
+                        break;
+                    case 'Z': // ^Z must be escaped on Win32
+                        sb.append('\032');
+                        break;
+                    case '_':
+                    case '%':
+                        sb.append('\\'); // remember prefix for wildcard
+                        sb.append(str.charAt(i + 1));
+                        break;
+                    default:
+                        sb.append(str.charAt(i + 1));
+                        break;
+                }
+                i++;
+            } else {
+                sb.append(c);
+            }
+        }
+
+        return sb.toString();
+    }
+
     @Override
     public Expression 
visitParenthesizedExpression(ParenthesizedExpressionContext ctx) {
         return getExpression(ctx.expression());


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