1? label:
2 SIGNAL
3 SQLSTATE
3.1! VALUE
3.2 sqlstate-string-constant
3.2 sqlstate-string-variable
3 condition-name
4? signal-information

signal-information:

1 SET
1.1+ ,
1.1.0 MESSAGE_TEXT
1.1.0 CONSTRAINT_CATALOG
1.1.0 CONSTRAINT_SCHEMA
1.1.0 CONSTRAINT_NAME
1.1.0 CATALOG_NAME
1.1.0 SCHEMA_NAME
1.1.0 TABLE_NAME
1.1.0 COLUMN_NAME
1.1.0 CURSOR_NAME
1.1.0 CLASS_ORIGIN
1.1.0 SUBCLASS_ORIGIN
1.1.1  = 
1.1.2 SQL-variable-name
1.1.2 SQL-parameter-name
1.1.2 diagnostic-string-constant
1 ( diagnostic-string-constant )