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ALTER TABLE EXCHANGE PARTITION and PURGE related C++ code blocks have diverged in the two *.yy files.
Under terms of this task we'll synchronize the code.
Let's move the C++ code into new LEX methods:
bool stmt_alter_table_exchange_partition(Table_ident *table);
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void stmt_purge_to(const LEX_CSTRING &to);
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bool stmt_purge_before(Item *item);
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The relevant grammar in the new reduction will look like:
alter_commands:
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...
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| EXCHANGE_SYM PARTITION_SYM alt_part_name_item
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WITH TABLE_SYM table_ident have_partitioning
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{
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if (Lex->stmt_alter_table_exchange_partition($6))
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MYSQL_YYABORT;
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}
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;
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purge:
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PURGE master_or_binary LOGS_SYM TO_SYM TEXT_STRING_sys
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{
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Lex->stmt_purge_to($5);
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}
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| PURGE master_or_binary LOGS_SYM BEFORE_SYM expr_no_subselect
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{
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if (Lex->stmt_purge_before($5))
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MYSQL_YYABORT;
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}
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;
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