[fix](serde)fix string deserialize with unescaped char

be/src/vec/functions/function_cast.h

@@ -576,6 +576,7 @@ struct ConvertImplGenericFromString {
             const bool is_complex = is_complex_type(data_type_to);
             DataTypeSerDe::FormatOptions format_options;
             format_options.converted_from_string = true;
+            format_options.escape_char = '\\';
 
             for (size_t i = 0; i < size; ++i) {
                 const auto& val = col_from_string->get_data_at(i);

regression-test/data/jsonb_p0/test_jsonb_unescaped.csv

@@ -0,0 +1,5 @@
+1	\N
+2	['{\'x\' : \'{"y" : 1}\', \'t\' : \'{"y" : 2}\'}', '{"x" : 1}']
+3	['foo\'bar', 'foo"bar', 'foo\\'bar', 'foo\'\'bar']
+4	['\/some\/cool\/url', '/some/cool/url', 'a\\_\\c\\l\\i\\c\\k\\h\\o\\u\\s\\e']
+5	["\"双引号\"", "反斜\\线"]

regression-test/data/jsonb_p0/test_jsonb_unescaped.json

@@ -0,0 +1,5 @@
+{"id":1,"a":null}
+{"id":2,"a":['{\'x\' : \'{"y" : 1}\', \'t\' : \'{"y" : 2}\'}', \'{"x" : 1}']}
+{"id":3,"a":['foo\'bar', 'foo\"bar', 'foo\\\'bar', 'foo\'\'bar']}
+{"id":4,"a":['\/some\/cool\/url', '/some/cool/url', 'a\\_\\c\\l\\i\\c\\k\\h\\o\\u\\s\\e']}
+{"id":5,"a":["\"双引号\"", "反斜\\线"]}

regression-test/data/jsonb_p0/test_jsonb_with_unescaped_string.out

@@ -0,0 +1,15 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !select_csv --
+1	\N
+2	["{'x' : '{"y" : 1}', 't' : '{"y" : 2}'}", "{"x" : 1}"]
+3	["foo'bar', 'foo"bar', 'foo\\'bar', 'foo''bar"]
+4	["/some/cool/url", "/some/cool/url", "a\\_\\c\\l\\i\\c\\k\\h\\o\\u\\s\\e"]
+5	[""双引号"", "反斜\\线"]
+
+-- !select_json --
+1	\N
+2	["{'x' : '{"y" : 1}', 't' : '{"y" : 2}'}", "'{"x" : 1}'"]
+3	["foo'bar', 'foo"bar', 'foo\\'bar', 'foo''bar"]
+4	["/some/cool/url", "/some/cool/url", "a\\_\\c\\l\\i\\c\\k\\h\\o\\u\\s\\e"]
+5	[""双引号"", "反斜\\线"]
+

regression-test/suites/jsonb_p0/test_jsonb_with_unescaped_string.groovy

@@ -0,0 +1,99 @@
+// 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.
+
+import org.codehaus.groovy.runtime.IOGroovyMethods
+
+suite("test_jsonb_with_unescaped_string", "p0") {
+
+    // define a sql table with array<text> which has some Escape Character and should also to cast to json
+    def testTable = "tbl_unescaped_jsonb"
+    def dataFile = "test_jsonb_unescaped.csv"
+    def dataFileJson = "test_jsonb_unescaped.json"
+
+    sql """ set experimental_enable_nereids_planner = true """
+    sql """ set enable_fallback_to_original_planner = true """
+
+    sql "DROP TABLE IF EXISTS ${testTable}"
+
+    sql """
+        CREATE TABLE IF NOT EXISTS ${testTable} (
+            id INT,
+            a ARRAY<TEXT>,
+        )
+        DUPLICATE KEY(id)
+        DISTRIBUTED BY HASH(id) BUCKETS 3
+        PROPERTIES("replication_num" = "1");
+        """
+
+    // load the jsonb data from csv file
+    streamLoad {
+        table testTable
+
+        file dataFile // import csv file
+        time 10000 // limit inflight 10s
+        set 'strict_mode', 'true'
+
+        // if declared a check callback, the default check condition will ignore.
+        // So you must check all condition
+        check { result, exception, startTime, endTime ->
+            if (exception != null) {
+                throw exception
+            }
+            log.info("Stream load result: ${result}".toString())
+            def json = parseJson(result)
+            assertEquals(5, json.NumberTotalRows)
+            assertEquals(5, json.NumberLoadedRows)
+            assertTrue(json.LoadBytes > 0)
+        }
+    }
+
+    sql """ sync; """
+
+    // check result
+    qt_select_csv "SELECT * FROM ${testTable} ORDER BY id"
+
+    sql "truncate table ${testTable}"
+    // load the jsonb data from json file
+    streamLoad {
+        table testTable
+
+        file dataFileJson // import json file
+        time 10000 // limit inflight 10s
+        set 'format', 'json' // import format
+        set 'read_json_by_line', 'true' // read json by line
+        set 'strict_mode', 'true'
+
+        // if declared a check callback, the default check condition will ignore.
+        // So you must check all condition
+        check { result, exception, startTime, endTime ->
+            if (exception != null) {
+                throw exception
+            }
+            log.info("Stream load result: ${result}".toString())
+            def json = parseJson(result)
+            assertEquals(5, json.NumberTotalRows)
+            assertEquals(5, json.NumberLoadedRows)
+            assertTrue(json.LoadBytes > 0)
+        }
+    }
+
+
+    sql """ sync; """
+
+    // check result
+    qt_select_json "SELECT * FROM ${testTable} ORDER BY id"
+}