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MDEV-31153 New methods Schema::make_item_func_* for REPLACE, SUBSTRING, TRIM

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Adding virtual methods to class Schema:

  make_item_func_replace()
  make_item_func_substr()
  make_item_func_trim()

This is a non-functional preparatory change for MDEV-27744.
This commit is contained in:
Alexander Barkov
2023-04-29 07:39:38 +04:00
parent 2e74f9d281
commit ddcc9d2281
7 changed files with 170 additions and 74 deletions
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11
sql/sql_schema.h
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@ -33,6 +33,17 @@ public:
{
return src;
}
// Builders for native SQL function with a special syntax in sql_yacc.yy
virtual Item *make_item_func_replace(THD *thd,
Item *subj,
Item *find,
Item *replace) const;
virtual Item *make_item_func_substr(THD *thd,
const Lex_substring_spec_st &spec) const;
virtual Item *make_item_func_trim(THD *thd, const Lex_trim_st &spec) const;
/*
For now we have *hard-coded* compatibility schemas:
schema_mariadb, schema_oracle, schema_maxdb.