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Use default character set for expressions

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- Force usage of () around complex DEFAULT expressions
- Give error if DEFAULT expression contains invalid characters
- Don't use const_charset_conversion for stored Item_func_sysconf expressions
  as the result is not constaint over different executions
- Fixed Item_func_user() to not store calculated value in str_value
This commit is contained in:
Michael Widenius
2016-06-24 23:42:35 +02:00
committed by Sergei Golubchik
parent 8f226121e5
commit fb67cde237
21 changed files with 508 additions and 268 deletions
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sql/handler.h
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@ -1649,7 +1649,7 @@ struct Table_scope_and_contents_source_st
ulong avg_row_length;
ulong used_fields;
ulong key_block_size;
ulong expression_lengths;
ulong expression_length;
ulong field_check_constraints;
/*
number of pages to sample during