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restructure indexes on the various Events tables. Use two separate indexes for MonitorId and StartTime because we access these tables using one or the other, but rarely both

This commit is contained in:
Isaac Connor 2018-01-18 11:39:23 -05:00
parent 1dbd8405a4
commit 314390a161
1 changed files with 61 additions and 0 deletions
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61
db/zm_update-1.31.24.sql Normal file
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set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Hour' and index_name = 'Events_Hour_MonitorId_StartTime_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, 'DROP INDEX Events_Hour_MonitorId_StartTime_idx ON Events_Hour', "SELECT 'Events_Hour_MonitorId_StartTime_idx INDEX is already removed.'");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Hour' and index_name = 'Events_Hour_MonitorId_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, "SELECT 'Events_Hour_MonitorId_idx INDEX already exists.'", "CREATE INDEX `Events_Hour_MonitorId_idx` ON `Events_Hour` (`MonitorId`)");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Hour' and index_name = 'Events_Hour_StartTime_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, "SELECT 'Events_Hour_StartTime_idx INDEX already exists.'", "CREATE INDEX `Events_Hour_StartTime_idx` ON `Events_Hour` (`StartTime`)");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Day' and index_name = 'Events_Day_MonitorId_StartTime_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, 'DROP INDEX Events_Day_MonitorId_StartTime_idx ON Events_Day', "SELECT 'Events_Day_MonitorId_StartTime_idx INDEX is already removed.'");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Day' and index_name = 'Events_Day_MonitorId_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, "SELECT 'Events_Day_MonitorId_idx INDEX already exists.'", "CREATE INDEX `Events_Day_MonitorId_idx` ON `Events_Day` (`MonitorId`)");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Day' and index_name = 'Events_Day_StartTime_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, "SELECT 'Events_Day_StartTime_idx INDEX already exists.'", "CREATE INDEX `Events_Day_StartTime_idx` ON `Events_Day` (`StartTime`)");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Week' and index_name = 'Events_Week_MonitorId_StartTime_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, 'DROP INDEX Events_Week_MonitorId_StartTime_idx ON Events_Week', "SELECT 'Events_Week_MonitorId_StartTime_idx INDEX is already removed.'");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Week' and index_name = 'Events_Week_MonitorId_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, "SELECT 'Events_Week_MonitorId_idx INDEX already exists.'", "CREATE INDEX `Events_Week_MonitorId_idx` ON `Events_Day` (`MonitorId`)");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Week' and index_name = 'Events_Week_StartTime_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, "SELECT 'Events_Week_StartTime_idx INDEX already exists.'", "CREATE INDEX `Events_Week_StartTime_idx` ON `Events_Week` (`StartTime`)");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Month' and index_name = 'Events_Month_MonitorId_StartTime_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, 'DROP INDEX Events_Month_MonitorId_StartTime_idx ON Events_Month', "SELECT 'Events_Month_MonitorId_StartTime_idx INDEX is already removed.'");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Month' and index_name = 'Events_Month_MonitorId_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, "SELECT 'Events_Month_MonitorId_idx INDEX already exists.'", "CREATE INDEX `Events_Month_MonitorId_idx` ON `Events_Month` (`MonitorId`)");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
set @exist := (select count(*) from information_schema.statistics where table_name = 'Events_Month' and index_name = 'Events_Month_StartTime_idx' and table_schema = database());
set @sqlstmt := if( @exist > 0, "SELECT 'Events_Month_StartTime_idx INDEX already exists.'", "CREATE INDEX `Events_Month_StartTime_idx` ON `Events_Month` (`StartTime`)");
PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;