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Fixed bug with UPDATE/DELETE on UNIQUE key which could be NULL

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Docs/manual.texi:
  Updated replication section
mysql-test/r/null_key.result:
  Added test UPDATE/DELETE with IS NULL on unique key
mysql-test/t/null_key.test:
  Added test UPDATE/DELETE with IS NULL on unique key
mysys/Makefile.am:
  Removed -f from $CP as this is not portable
  Fixed rule for testhash
sql/field.cc:
  Safety fix
sql/opt_range.cc:
  Fixed bug with UPDATE/DELETE on UNIQUE key which could be NULL
sql/opt_range.h:
  Fixed bug with UPDATE/DELETE on UNIQUE key which could be NULL
This commit is contained in:
unknown
2001-04-10 11:32:28 +03:00
parent c7105d8008
commit 92de72694b
7 changed files with 135 additions and 15 deletions
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sql/field.cc
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@@ -3891,7 +3891,7 @@ String *Field_blob::val_str(String *val_buffer __attribute__((unused)),
char *blob;
memcpy_fixed(&blob,ptr+packlength,sizeof(char*));
if (!blob)
val_ptr->length(0);
val_ptr->set("",0); // A bit safer than ->length(0)
else
val_ptr->set((const char*) blob,get_length(ptr));
return val_ptr;