Comments (2)
shlomi-noach
commented on June 10, 2024
Simple table structure to test with:
CREATE TABLE `t` (
`id` int NOT NULL AUTO_INCREMENT,
`v1` varchar(1000) NOT NULL,
`v2` varchar(1000) NOT NULL,
`v3` varchar(1000) NOT NULL,
`v4` varchar(1000) NOT NULL,
`v5` varchar(1000) NOT NULL,
`v6` varchar(1000) NOT NULL,
`v7` varchar(1000) NOT NULL,
PRIMARY KEY (`id`),
KEY `v1_idx` (`v1`)
) ENGINE InnoDB,
CHARSET utf8mb3,
ROW_FORMAT COMPACT;from vitess.
shlomi-noach
commented on June 10, 2024
InnoDB snippet:
uint ha_innobase::max_supported_key_part_length(
HA_CREATE_INFO *create_info) const {
/* A table format specific index column length check will be performed
at ha_innobase::add_index() and row_create_index_for_mysql() */
switch (create_info->row_type) {
case ROW_TYPE_REDUNDANT:
case ROW_TYPE_COMPACT:
return (REC_ANTELOPE_MAX_INDEX_COL_LEN - 1);
break;
default:
return (REC_VERSION_56_MAX_INDEX_COL_LEN);
}
}from vitess.
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