syucream/spar

Validate literal tokens

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syucream commented 
decimal_value:
    [-]0—9+

hex_value:
    [-]0x{0—9|a—f|A—F}+

database_id:
    {a—z}[{a—z|0—9|_|-}+]{a—z|0—9}

table_name, column_name, index_name:
    {a—z|A—Z}[{a—z|A—Z|0—9|_}+]

https://cloud.google.com/spanner/docs/data-definition-language