MDEV-22164 without validation for exchange partition/convert in

1. WITHOUT/WITH VALIDATION may be added to EXCHANGE PARTITION or CONVERT TABLE:

  alter table tp exchange partition p1 with table t with validation;
  alter table tp exchange partition p1 with table t; -- same as with validation
  alter table tp exchange partition p1 with table t without validation;

2. Optional THAN keyword for RANGE partitioning. Normally you type:

  create table tp (a int primary key) partition by range (a) (
    partition p0 values less than (100),
    partition p1 values less than maxvalue);

  Now you may type (PARTITION keyword is also optional):

  create table tp (a int primary key) partition by range (a) (
    p0 values less (100),
    p1 values less maxvalue);

mysql-test/suite/parts/r/alter_table.result

@@ -358,3 +358,177 @@ disconnect con1;
 connection default;
 drop user u@localhost;
 drop database db;
+#
+# MDEV-22164 without validation for exchange partition/convert in
+#
+create table validation(x int);
+drop table validation;
+create table t (a int primary key);
+create table tp (a int primary key) partition by range (a) (
+partition p0 values less than (100),
+# Cunning syntax (same as above)
+p1 values less (300));
+insert into t values (1), (99);
+insert into tp values (2), (200);
+select * from t order by a;
+a
+1
+99
+select * from tp partition (p0) order by a;
+a
+2
+select * from tp partition (p1) order by a;
+a
+200
+alter table tp exchange partition p0 with table t;
+select * from t order by a;
+a
+2
+select * from tp partition (p0) order by a;
+a
+1
+99
+select * from tp partition (p1) order by a;
+a
+200
+alter table tp exchange partition p0 with table t;
+select * from t order by a;
+a
+1
+99
+select * from tp partition (p0) order by a;
+a
+2
+select * from tp partition (p1) order by a;
+a
+200
+alter table tp exchange partition p1 with table t;
+ERROR HY000: Found a row that does not match the partition
+alter table tp exchange partition p1 with table t with validation;
+ERROR HY000: Found a row that does not match the partition
+alter table tp exchange partition p1 with table t without validation;
+select * from t order by a;
+a
+200
+select * from tp partition (p1) order by a;
+a
+1
+99
+alter table tp check partition p0;
+Table	Op	Msg_type	Msg_text
+test.tp	check	status	OK
+alter table tp check partition p1;
+Table	Op	Msg_type	Msg_text
+test.tp	check	error	Found a misplaced row
+test.tp	check	error	Partition p1 returned error
+test.tp	check	error	Upgrade required. Please do "REPAIR TABLE `tp`" or dump/reload to fix it!
+alter table tp exchange partition p1 with table t with validation;
+alter table tp exchange partition p1 with table t with validation;
+ERROR HY000: Found a row that does not match the partition
+select * from t order by a;
+a
+1
+99
+select * from tp partition (p1) order by a;
+a
+200
+create or replace procedure validation()
+alter table tp exchange partition p1 with table t with validation;
+create or replace procedure without_validation()
+alter table tp exchange partition p1 with table t without validation;
+call validation;
+ERROR HY000: Found a row that does not match the partition
+call without_validation;
+call validation;
+call validation;
+ERROR HY000: Found a row that does not match the partition
+call without_validation;
+select * from t order by a;
+a
+200
+select * from tp partition (p1) order by a;
+a
+1
+99
+call validation;
+select * from t order by a;
+a
+1
+99
+select * from tp partition (p1) order by a;
+a
+200
+drop procedure validation;
+drop procedure without_validation;
+prepare validation from "alter table tp exchange partition p1 with table t with validation";
+prepare without_validation from "alter table tp exchange partition p1 with table t without validation";
+execute validation;
+ERROR HY000: Found a row that does not match the partition
+execute without_validation;
+execute validation;
+execute validation;
+ERROR HY000: Found a row that does not match the partition
+execute without_validation;
+select * from t order by a;
+a
+200
+select * from tp partition (p1) order by a;
+a
+1
+99
+execute validation;
+select * from t order by a;
+a
+1
+99
+select * from tp partition (p1) order by a;
+a
+200
+drop prepare validation;
+drop prepare without_validation;
+alter table tp convert table t to partition p2 values less (maxvalue);
+ERROR HY000: Found a row that does not match the partition
+alter table tp convert table t to partition p2 values less (maxvalue) with validation;
+ERROR HY000: Found a row that does not match the partition
+alter table tp convert table t to partition p2 values less (maxvalue) without validation;
+select * from tp partition (p0) order by a;
+a
+2
+select * from tp partition (p1) order by a;
+a
+200
+select * from tp partition (p2) order by a;
+a
+1
+99
+create table t (a int primary key);
+insert t values (1), (2);
+create or replace table tp (a int primary key)
+partition by hash(a) partitions 2;
+insert tp values (1), (2), (3), (4);
+alter table tp exchange partition p0 with table t;
+ERROR HY000: Found a row that does not match the partition
+alter table tp exchange partition p0 with table t without validation;
+select * from t;
+a
+2
+4
+alter table tp exchange partition p0 with table t;
+drop table tp;
+create or replace table tp (a int primary key)
+partition by list(a) (
+partition p0 values in (2, 3, 4),
+partition p1 values in (12, 13, 14),
+partition p2 values in (52, 53, 54));
+insert tp values (12), (2), (3), (4);
+alter table tp exchange partition p0 with table t;
+ERROR HY000: Table has no partition for value 0
+alter table tp exchange partition p0 with table t without validation;
+select * from t;
+a
+2
+3
+4
+alter table tp exchange partition p0 with table t;
+drop tables tp, t;
+# End of 11.4 tests

mysql-test/suite/parts/t/alter_table.test

@@ -319,3 +319,132 @@ alter table t1 convert table tp to partition p2 values less than (1000);
 --connection default
 drop user u@localhost;
 drop database db;
+
+--echo #
+--echo # MDEV-22164 without validation for exchange partition/convert in
+--echo #
+
+create table validation(x int);
+drop table validation;
+
+create table t (a int primary key);
+
+create table tp (a int primary key) partition by range (a) (
+  partition p0 values less than (100),
+  # Cunning syntax (same as above)
+  p1 values less (300));
+
+insert into t values (1), (99);
+insert into tp values (2), (200);
+
+select * from t order by a;
+select * from tp partition (p0) order by a;
+select * from tp partition (p1) order by a;
+
+alter table tp exchange partition p0 with table t;
+select * from t order by a;
+select * from tp partition (p0) order by a;
+select * from tp partition (p1) order by a;
+
+alter table tp exchange partition p0 with table t;
+select * from t order by a;
+select * from tp partition (p0) order by a;
+select * from tp partition (p1) order by a;
+
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table tp exchange partition p1 with table t;
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table tp exchange partition p1 with table t with validation;
+alter table tp exchange partition p1 with table t without validation;
+select * from t order by a;
+select * from tp partition (p1) order by a;
+alter table tp check partition p0;
+alter table tp check partition p1;
+
+alter table tp exchange partition p1 with table t with validation;
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table tp exchange partition p1 with table t with validation;
+select * from t order by a;
+select * from tp partition (p1) order by a;
+
+# SP
+create or replace procedure validation()
+alter table tp exchange partition p1 with table t with validation;
+create or replace procedure without_validation()
+alter table tp exchange partition p1 with table t without validation;
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+call validation;
+call without_validation;
+call validation;
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+call validation;
+call without_validation;
+select * from t order by a;
+select * from tp partition (p1) order by a;
+call validation;
+select * from t order by a;
+select * from tp partition (p1) order by a;
+drop procedure validation;
+drop procedure without_validation;
+
+# PS
+prepare validation from "alter table tp exchange partition p1 with table t with validation";
+prepare without_validation from "alter table tp exchange partition p1 with table t without validation";
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+execute validation;
+execute without_validation;
+execute validation;
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+execute validation;
+execute without_validation;
+select * from t order by a;
+select * from tp partition (p1) order by a;
+execute validation;
+select * from t order by a;
+select * from tp partition (p1) order by a;
+drop prepare validation;
+drop prepare without_validation;
+
+# CONVERT IN
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table tp convert table t to partition p2 values less (maxvalue);
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table tp convert table t to partition p2 values less (maxvalue) with validation;
+alter table tp convert table t to partition p2 values less (maxvalue) without validation;
+select * from tp partition (p0) order by a;
+select * from tp partition (p1) order by a;
+select * from tp partition (p2) order by a;
+
+# Hash
+create table t (a int primary key);
+insert t values (1), (2);
+
+create or replace table tp (a int primary key)
+partition by hash(a) partitions 2;
+
+insert tp values (1), (2), (3), (4);
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table tp exchange partition p0 with table t;
+alter table tp exchange partition p0 with table t without validation;
+select * from t;
+alter table tp exchange partition p0 with table t;
+drop table tp;
+
+# List
+create or replace table tp (a int primary key)
+partition by list(a) (
+  partition p0 values in (2, 3, 4),
+  partition p1 values in (12, 13, 14),
+  partition p2 values in (52, 53, 54));
+
+
+insert tp values (12), (2), (3), (4);
+--error ER_NO_PARTITION_FOR_GIVEN_VALUE
+alter table tp exchange partition p0 with table t;
+alter table tp exchange partition p0 with table t without validation;
+select * from t;
+alter table tp exchange partition p0 with table t;
+
+drop tables tp, t;
+
+--echo # End of 11.4 tests

sql/lex.h

@@ -714,6 +714,7 @@ SYMBOL symbols[] = {
   { "UTC_DATE",         SYM(UTC_DATE_SYM)},
   { "UTC_TIME",         SYM(UTC_TIME_SYM)},
   { "UTC_TIMESTAMP",    SYM(UTC_TIMESTAMP_SYM)},
+  { "VALIDATION",       SYM(VALIDATION_SYM)},
   { "VALUE",		SYM(VALUE_SYM)},
   { "VALUES",		SYM(VALUES)},
   { "VARBINARY",	SYM(VARBINARY)},

sql/sql_lex.cc

@@ -1301,6 +1301,7 @@ void LEX::start(THD *thd_arg)
   default_used= 0;
   with_rownum= FALSE;
   is_lex_started= 1;
+  without_validation= 0;
 
   create_info.lex_start();
   name= null_clex_str;
@@ -3932,7 +3933,7 @@ LEX::LEX()
   : explain(NULL), result(0), part_info(NULL), arena_for_set_stmt(0),
     mem_root_for_set_stmt(0), json_table(NULL), analyze_stmt(0),
     default_used(0),
-    with_rownum(0), is_lex_started(0), option_type(OPT_DEFAULT),
+    with_rownum(0), is_lex_started(0), without_validation(0), option_type(OPT_DEFAULT),
     context_analysis_only(0), sphead(0), sp_mem_root_ptr(nullptr),
     limit_rows_examined_cnt(ULONGLONG_MAX)
 {

sql/sql_lex.h

@@ -3440,6 +3440,7 @@ struct LEX: public Query_tables_list
   bool default_used:1;    /* using default() function */
   bool with_rownum:1;     /* Using rownum() function */
   bool is_lex_started:1;  /* If lex_start() did run. For debugging. */
+  bool without_validation:1; /* exchange or convert partition WITHOUT VALIDATION */
 
   /*
     This variable is used in post-parse stage to declare that sum-functions,

sql/sql_partition.cc

@@ -4107,6 +4107,9 @@ bool verify_data_with_partition(TABLE *table, TABLE *part_table,
   DBUG_ASSERT(table && table->file && part_table && part_table->part_info &&
               part_table->file);
 
+  if (table->in_use->lex->without_validation)
+    DBUG_RETURN(false);
+
   /*
     Verify all table rows.
     First implementation uses full scan + evaluates partition functions for