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MDEV-31608 - Connector/NET fails to connect since 10.10

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Connector/NET does not expect collation IDs returned by "show collations"
to be NULL, runs into an exception.

The fix is to determine connector/net using its connection attributes,
then make sure "show collations" does not output NULL IDs.

The patch introduces new old_mode NO_NULL_COLLATION_IDs, that is
automatically set, once MySQL Connector/NET connection is determined.

A test was added, that uses MySql.Data from powershell - only works
if MySql.Data is installed into GAC (i.e with C/NET MSI package)
This commit is contained in:
Vladislav Vaintroub
2023-10-06 22:36:32 +02:00
parent 6d0bcfc4b9
commit 9d07b0520c
15 changed files with 148 additions and 20 deletions
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sql/sql_class.h
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@ -201,6 +201,7 @@ enum enum_binlog_row_image {
#define OLD_MODE_UTF8_IS_UTF8MB3 (1 << 3)
#define OLD_MODE_IGNORE_INDEX_ONLY_FOR_JOIN (1 << 4)
#define OLD_MODE_COMPAT_5_1_CHECKSUM (1 << 5)
#define OLD_MODE_NO_NULL_COLLATION_IDS (1 << 6)
extern char internal_table_name[2];
extern char empty_c_string[1];