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new method to detect commands where all VIEWs should be temporary tables (BUG#4803)

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mysql-test/r/view.result:
  Showing VIEW with VIEWs in subquery
mysql-test/t/view.test:
  Showing VIEW with VIEWs in subquery
sql/sql_lex.cc:
  new method to detect commands where all VIEWs should be temporary tables
sql/sql_lex.h:
  new method to detect commands where all VIEWs should be temporary tables
sql/sql_view.cc:
  new method to detect commands where all VIEWs should be temporary tables
  debug output added
This commit is contained in:
unknown
2004-08-24 22:51:23 +03:00
parent 52b735a1a2
commit b8785595b9
5 changed files with 49 additions and 2 deletions
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5
sql/sql_view.cc
View File

@ -659,7 +659,8 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
if (table->algorithm != VIEW_ALGORITHM_TMEPTABLE &&
lex->can_be_merged() &&
(table->select_lex->master_unit() != &old_lex->unit ||
old_lex->can_use_merged()))
old_lex->can_use_merged()) &&
!old_lex->can_not_use_merged())
{
/*
TODO: support multi tables substitutions
@ -672,6 +673,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
DBUG_ASSERT(view_table != 0);
table->effective_algorithm= VIEW_ALGORITHM_MERGE;
DBUG_PRINT("info", ("algorithm: MERGE"));
table->updatable= (table->updatable_view != 0);
if (old_next)
@ -701,6 +703,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
}
table->effective_algorithm= VIEW_ALGORITHM_TMEPTABLE;
DBUG_PRINT("info", ("algorithm: TEMPORARY TABLE"));
lex->select_lex.linkage= DERIVED_TABLE_TYPE;
table->updatable= 0;