67 lines
1.7 KiB
Plaintext
67 lines
1.7 KiB
Plaintext
Grammar for the SQL dialect support in ADSI's OLE DB provider.
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The grammar we used is a subset derived from the SQL ODBC miniumum grammar.
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2.1 The Terminal Tokens
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TERMINAL SYMBOLS (TOKENS) to be expected by the parser.
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TOKEN_ERROR
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TOKEN_STAR
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TOKEN_LPARAN
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TOKEN_RPARAN
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TOKEN_INTEGER_LITERAL
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TOKEN_REAL_LITERAL
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TOKEN_STRING_LITERAL
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TOKEN_USER_DEFINED_NAME
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TOKEN_COMMA
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TOKEN_SELECT
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TOKEN_ALL
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TOKEN_FROM
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TOKEN_WHERE
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TOKEN_BOOLEAN_LITERAL
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TOKEN_AND
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TOKEN_OR
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TOKEN_NOT
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TOKEN_END
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TOKEN_LT
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TOKEN_GT
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TOKEN_GE
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TOKEN_LE
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TOKEN_EQ
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TOKEN_NE
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2.2 The Grammer
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statement ::= select-statement
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select-statement ::= TOKEN_SELECT [TOKEN_ALL] select-list TOKEN_FROM table-identifier [TOKEN_WHERE search-condition]
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select-list ::= TOKEN_STAR | select-sublist [TOKEN_COMMA select-sublist]...
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select-sublist ::= column-identifier
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column-identifier ::= TOKEN_USER_DEFINED_NAME
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table-identifier ::= TOKEN_STRING_LITERAL
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search-condition ::= boolean-term [TOKEN_OR search-condition]
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boolean-term ::= boolean-factor [TOKEN_AND boolean-term]
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boolean-factor ::= [TOKEN_NOT] boolean-primary
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boolean-primary ::= comparison-predicate | TOKEN_LPARAN search-condition TOKEN_RPARAN
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comparison-predicate ::= column-identifier TOKEN_COMPARISON_OPERATOR literal
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literal ::= TOKEN_STRING_LITERAL | numeric-literal | TOKEN_BOOLEAN_LITERAL
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numeric-literal ::= TOKEN_INTEGER_LITERAL | TOKEN_REAL_LITERAL
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For example, the tokens generated by the lexer for the following SQL statement
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SELECT CN, objectClass FROM 'LDAP://ntdsdc1/c=US/O=Microsoft/OU=NTDS' WHERE
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ObjectClass = User OR AGE > 25
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