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exosql

0.1.0
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Universal SQL engine for Elixir. This library implements the SQL logic to perform queries on user provided databases using a simple interface based on Foreign Data Wrappers from PostgreSQL.

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exosql src sql_lexer.xrl
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src/sql_lexer.xrl 

Definitions.



INT    = [0-9]+

ID     = [_a-zA-Z][_a-zA-Z0-9]*

COMMA  = ,

DOT    = \.

OP     = (<=|>=|==|!=|<>|-|\+|<|>|=|and|or|AND|OR|\|\||\*)

SPACE  = [\n\t\s]+

OPEN_PAR = \(

CLOSE_PAR = \)

QUOTED_STRING = ("(.|[^"])*"|'(.|[^"])*')

%% "'





Rules.



{SPACE}  : skip_token.

{OP}     : {token, {op, TokenLine, TokenChars}}.

{ID}     : {token, {id, TokenLine, TokenChars}}.

{COMMA}  : {token, {comma, TokenLine, TokenChars}}.

{DOT}    : {token, {dot, TokenLine, TokenChars}}.

{OPEN_PAR}      : {token, {open_par, TokenLine, TokenChars}}.

{CLOSE_PAR}     : {token, {close_par, TokenLine, TokenChars}}.

{INT}{DOT}{INT} : {token, {lit, TokenLine, TokenChars}}.

{INT}           : {token, {lit, TokenLine, TokenChars}}.

{QUOTED_STRING} : {token, {lit, TokenLine, string:slice(TokenChars, 1, string:length(TokenChars)-2)}}.



Erlang code.