GITBOOK-1642: Small fixes.

Author: mariadb-stefan-hinz

server/reference/system-tables/performance-schema/performance-schema-tables/performance-schema-metadata_locks-table.md

@@ -30,62 +30,52 @@ The table contains the following columns:
   * Null: No
   * Default: `NULL`
   * Description: Object type. One of `BACKUP`, `COMMIT`, `EVENT`, `FUNCTION`, `GLOBAL`, `LOCKING SERVICE`, `PROCEDURE`, `SCHEMA`, `TABLE`, `TABLESPACE`, `TRIGGER` (unused) or `USER LEVEL LOCK`.
-
 * `OBJECT_SCHEMA`
   * `VARCHAR(64)`
   * Null: Yes
   * Default: `NULL`
   * Description: Object schema.
-
 * `OBJECT_NAME`
   * `VARCHAR(64)`
   * Null: Yes
   * Default: `NULL`
   * Description: Object name.
-
 * `OBJECT_INSTANCE_BEGIN`
   * `BIGINT(20) UNSIGNED`
   * Null: No
   * Default: `NULL`
   * Description: Address in memory of the instrumented object.
-
 * `LOCK_TYPE`
   * `VARCHAR(32)`
   * Null: No
   * Default: `NULL`
   * Description: Lock type. One of `BACKUP_FTWRL1`, `BACKUP_START`, `BACKUP_TRANS_DML`, `EXCLUSIVE`, `INTENTION_EXCLUSIVE`, `SHARED`, `SHARED_HIGH_PRIO`, `SHARED_NO_READ_WRITE`, `SHARED_NO_WRITE`, `SHARED_READ`, `SHARED_UPGRADABLE`, or `SHARED_WRITE`.
-
 * `LOCK_DURATION`
   * `VARCHAR(32)`
   * Null: No
   * Default: `NULL`
   * Description: Lock duration. One of `EXPLICIT` (locks released by explicit action, for example a global lock acquired with `FLUSH TABLES WITH READ LOCK`) , `STATEMENT` (locks implicitly released at statement end), or `TRANSACTION` (locks implicitly released at transaction end).
-
 * `LOCK_STATUS`
   * `VARCHAR(32)`
   * Null: No
   * Default: `NULL`
   * Description: Lock status. One of `GRANTED`, `KILLED`, `PENDING`, `POST_RELEASE_NOTIFY`, `PRE_ACQUIRE_NOTIFY`, `TIMEOUT`, or `VICTIM`.
-
 * `SOURCE`
   * `VARCHAR(64)`
   * Null: Yes
   * Default: `NULL`
   * Description: Source file containing the instrumented code that produced the event, as well as the line number where the instrumentation occurred. This allows one to examine the source code involved.
-
 * `OWNER_THREAD_ID`
-  * `BIGINT(20)`
+  * `BIGINT(20) UNSIGNED` 
   * Null: Yes
   * Default: `NULL`
   * Description: Thread that requested the lock.
-
 * `OWNER_EVENT_ID`
-  * `BIGINT(20)`
+  * `BIGINT(20) UNSIGNED` 
   * Null: Yes
   * Default: `NULL`
   * Description: Event that requested the lock.
 
-
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