Adding thorough tests covering what happens with escaped sequences

in the SQL parser.

Various backslash escapes and quote-quote escaped sequences are covered
in combination with single and multi-byte characters.

This is especially important for the character sets that can have 0x5C
as the second byte in a multi-byte character (big5, cp932, gbk, sjis).

swe7 is also a special character set, because in swe7 0x5C is used for
both escape character and for "LATIN CAPITAL LETTER O WITH DIAERESIS".

mysql-test/include/bytes.inc

+#
+# Create a table with all byte values
+#
+CREATE TABLE halfs (a INT);
+INSERT INTO halfs VALUES (0x00),(0x01),(0x02),(0x03),(0x04),(0x05),(0x06),(0x07);
+INSERT INTO halfs VALUES (0x08),(0x09),(0x0A),(0x0B),(0x0C),(0x0D),(0x0E),(0x0F);
+CREATE TEMPORARY TABLE bytes (a BINARY(1), KEY(a)) ENGINE=MyISAM;
+INSERT INTO bytes SELECT CHAR((t1.a << 4) | t2.a USING BINARY) FROM halfs t1, halfs t2;
+DROP TABLE halfs;

mysql-test/include/bytes2.inc

+#
+# Create a table with all 2 byte sequence values
+#
+
+--source include/bytes.inc
+
+CREATE TABLE halfs (a BINARY(1));
+# "bytes" is a temporary table, hence is not allowed in joins
+# Create a non-temporary copy.
+INSERT INTO halfs SELECT * FROM bytes;
+CREATE TEMPORARY TABLE bytes2 (
+  a BINARY(2),
+  hi BINARY(1),
+  lo BINARY(1),
+  KEY(a),
+  KEY(lo)
+) ENGINE=MyISAM;
+INSERT INTO bytes2
+SELECT CONCAT(t1.a, t2.a), t1.a, t2.a FROM halfs t1, halfs t2
+ORDER BY t1.a, t2.a;
+DROP TABLE halfs;

mysql-test/t/ctype_big5.test

@@ -169,3 +169,14 @@ set collation_connection=big5_bin;
 --echo #
 --echo # End of 5.6 tests
 --echo #
+
+--echo #
+--echo # Start of 10.0 tests
+--echo #
+
+let $ctype_unescape_combinations=selected;
+--source include/ctype_unescape.inc
+
+--echo #
+--echo # End of 10.0 tests
+--echo #

mysql-test/t/ctype_gb2312.test

@@ -149,3 +149,14 @@ set collation_connection=gb2312_bin;
 --echo #
 --echo # End of 5.6 tests
 --echo #
+
+--echo #
+--echo # Start of 10.0 tests
+--echo #
+
+let $ctype_unescape_combinations=selected;
+--source include/ctype_unescape.inc
+
+--echo #
+--echo # End of 10.0 tests
+--echo #

mysql-test/t/ctype_gbk.test

@@ -187,3 +187,14 @@ set collation_connection=gbk_bin;
 --echo #
 --echo # End of 5.6 tests
 --echo #
+
+--echo #
+--echo # Start of 10.0 tests
+--echo #
+
+let $ctype_unescape_combinations=selected;
+--source include/ctype_unescape.inc
+
+--echo #
+--echo # End of 10.0 tests
+--echo #

mysql-test/t/ctype_latin1.test

@@ -202,3 +202,14 @@ set names latin1;
 --echo #
 --echo # End of 5.6 tests
 --echo #
+
+--echo #
+--echo # Start of 10.0 tests
+--echo #
+
+let $ctype_unescape_combinations=selected;
+--source include/ctype_unescape.inc
+
+--echo #
+--echo # End of 10.0 tests
+--echo #

mysql-test/t/ctype_sjis.test

@@ -215,3 +215,14 @@ set collation_connection=sjis_bin;
 --echo #
 --echo # End of 5.6 tests
 --echo #
+
+--echo #
+--echo # Start of 10.0 tests
+--echo #
+
+let $ctype_unescape_combinations=selected;
+--source include/ctype_unescape.inc
+
+--echo #
+--echo # End of 10.0 tests
+--echo #

mysql-test/t/ctype_swe7.test

+--echo #
+--echo # Start of 10.0 tests
+--echo #
+
+let $ctype_unescape_combinations=selected;
+--source include/ctype_unescape.inc
+
+--echo #
+--echo # End of 10.0 tests
+--echo #

mysql-test/t/ctype_utf8.test

@@ -1738,6 +1738,9 @@ DEALLOCATE PREPARE stmt;
 DROP TABLE t1;
 
 
+let $ctype_unescape_combinations=selected;
+--source include/ctype_unescape.inc
+
 --echo #
 --echo # End of 10.0 tests
 --echo #