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We'll move this code in sp_head::init_sp_name():
/* We have to copy strings to get them into the right memroot. */
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m_db.length= spname->m_db.length;
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m_db.str= strmake_root(thd->mem_root, spname->m_db.str, spname->m_db.length);
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m_name.length= spname->m_name.length;
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m_name.str= strmake_root(thd->mem_root, spname->m_name.str,
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spname->m_name.length);
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to a new method in Database_qualified_name:
void Database_qualified_name::copy(MEM_ROOT *mem_root,
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const LEX_CSTRING &db,
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const LEX_CSTRING &name)
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{
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m_db.length= db.length;
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m_db.str= strmake_root(mem_root, db.str, db.length);
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m_name.length= name.length;
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m_name.str= strmake_root(mem_root, name.str, name.length);
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}
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It will be easier to reuse this code this way, e.g. for MDEV-10591.
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[MDEV-13531]