Struct ColumnInfo

A struct to hold column metadata

Name	Type	Description
`charSet`	`string`	Character set, "" if not applicable.
`charsMax`	`long`	Capacity in characters, -1L if not applicable
`collation`	`string`	Collation, "" if not applicable.
`colType`	`string`	More detail about the column type, e.g. "int(10) unsigned".
`comment`	`string`	Any comment that was set at table definition time.
`defaultNull`	`bool`	Is the default value NULL?
`defaultValue`	`string`	The default value as a string if not NULL
`extra`	`string`	Extra information.
`index`	`ulong`	Zero based index of the column within a table row.
`key`	`string`	Information about the column's key status, blank if none.
`name`	`string`	The name of the column.
`nullable`	`bool`	Can the column value be set to NULL
`numericPrecision`	`short`	Presentation information for numerics, -1L if not applicable.
`numericScale`	`short`	Scale information for numerics or NULL, -1L if not applicable.
`octetsMax`	`long`	Capacity in bytes - same as chars if not a unicode table definition, -1L if not applicable.
`privileges`	`string`	Privileges for logged in user.
`schema`	`string`	The database that the table having this column belongs to.
`table`	`string`	The table that this column belongs to.
`type`	`string`	What type is the column - tinyint, char, varchar, blob, date etc

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