comparison: libidav/davqlparser.h
libidav/davqlparser.h
- changeset 92
- e073cf4afc6a
- parent 91
- 838b427267bb
- child 95
- 8ed7d8df6427
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replaced
| 91:838b427267bb | 92:e073cf4afc6a |
|---|---|
| 52 | 52 |
| 53 /** | 53 /** |
| 54 * Enumeration of possible expression operators. | 54 * Enumeration of possible expression operators. |
| 55 */ | 55 */ |
| 56 typedef enum { | 56 typedef enum { |
| 57 DAVQL_NOOP, | 57 DAVQL_NOOP, DAVQL_CALL, DAVQL_ARGLIST, // internal representations |
| 58 DAVQL_ADD, DAVQL_SUB, DAVQL_MUL, DAVQL_DIV, | 58 DAVQL_ADD, DAVQL_SUB, DAVQL_MUL, DAVQL_DIV, |
| 59 DAVQL_AND, DAVQL_OR, DAVQL_XOR, DAVQL_NEG, | 59 DAVQL_AND, DAVQL_OR, DAVQL_XOR, DAVQL_NEG, // airthmetic |
| 60 DAVQL_NOT, DAVQL_LAND, DAVQL_LOR, DAVQL_LXOR, | 60 DAVQL_NOT, DAVQL_LAND, DAVQL_LOR, DAVQL_LXOR, // logical |
| 61 DAVQL_EQ, DAVQL_NEQ, DAVQL_LT, DAVQL_GT, DAVQL_LE, DAVQL_GE, | 61 DAVQL_EQ, DAVQL_NEQ, DAVQL_LT, DAVQL_GT, DAVQL_LE, DAVQL_GE, |
| 62 DAVQL_LIKE, DAVQL_UNLIKE | 62 DAVQL_LIKE, DAVQL_UNLIKE // comparisons |
| 63 } davqloperator_t; | 63 } davqloperator_t; |
| 64 | 64 |
| 65 /** | 65 /** |
| 66 * An expression within a DAVQL query. | 66 * An expression within a DAVQL query. |
| 67 */ | 67 */ |
| 108 * Expression = Expression, BinaryOperator, Expression | 108 * Expression = Expression, BinaryOperator, Expression |
| 109 * | UnaryOperator, Expression | 109 * | UnaryOperator, Expression |
| 110 * | FunctionCall | Identifier | Literal | 110 * | FunctionCall | Identifier | Literal |
| 111 * | "(", Expression, ")"; | 111 * | "(", Expression, ")"; |
| 112 * | 112 * |
| 113 * FunctionCall = Identifier, "(", Expression, ")"; | 113 * FunctionCall = Identifier, "(", ArgumentList, ")"; |
| 114 * ArgumentList = Expression, {",", Expression}; | |
| 114 * Identifier = IdentifierChar - ?Digit?, {IdentifierChar} | 115 * Identifier = IdentifierChar - ?Digit?, {IdentifierChar} |
| 115 * | "`", ?Character?, {?Character?}, "`"; | 116 * | "`", ?Character?, {?Character?}, "`"; |
| 116 * IdentifierChar = ?Character - (" "|",")?; | 117 * IdentifierChar = ?Character - (" "|",")?; |
| 117 * Literal = Number | String; | 118 * Literal = Number | String; |
| 118 * Number = ?Digit?, {?Digit?} | "%d"; | 119 * Number = ?Digit?, {?Digit?} | "%d"; |
| 132 * FieldExpressions = "*", {",", Expression, " as ", String} | 133 * FieldExpressions = "*", {",", Expression, " as ", String} |
| 133 * | FieldExpression, {",", FieldExpression} | 134 * | FieldExpression, {",", FieldExpression} |
| 134 * | "-"; | 135 * | "-"; |
| 135 * FieldExpression = Identifier | 136 * FieldExpression = Identifier |
| 136 * | Expression, " as ", String; | 137 * | Expression, " as ", String; |
| 137 * SetExpressions = SetExpression, {",", {SetExpressions}; | 138 * SetExpressions = SetExpression, {",", SetExpressions}; |
| 138 * SetExpression = Identifier, "=", Expression; | 139 * SetExpression = Identifier, "=", Expression; |
| 139 * | 140 * |
| 140 * WithClause = "depth", "=", (Number | "infinity"); | 141 * WithClause = "depth", "=", (Number | "infinity"); |
| 142 * | |
| 143 * OrderByClause = OrderByCriterion, {",", OrderByCriterion}; | |
| 144 * OrderByCriterion = (Identifier | Number), [" asc"|" desc"]; | |
| 141 * | 145 * |
| 142 * </pre> | 146 * </pre> |
| 143 * | 147 * |
| 144 * Note: mandatory spaces are part of the grammar. But you may also insert an | 148 * Note: mandatory spaces are part of the grammar. But you may also insert an |
| 145 * arbitrary amount of optional spaces between two symbols if they are not part | 149 * arbitrary amount of optional spaces between two symbols if they are not part |
| 147 * | 151 * |
| 148 * <b>GET:</b> | 152 * <b>GET:</b> |
| 149 * <pre> | 153 * <pre> |
| 150 * GetStatement = "get ", FieldExpressions, | 154 * GetStatement = "get ", FieldExpressions, |
| 151 * " from ", Identifier, | 155 * " from ", Identifier, |
| 156 * [" with ", WithClause], | |
| 152 * [" where ", LogicalExpression], | 157 * [" where ", LogicalExpression], |
| 153 * [" with ", WithClause]; | 158 * [" order by ", OrderByClause]; |
| 154 * </pre> | 159 * </pre> |
| 155 * | 160 * |
| 156 * <b>SET:</b> | 161 * <b>SET:</b> |
| 157 * <pre> | 162 * <pre> |
| 158 * "set ",SetExpressions, | 163 * "set ",SetExpressions, |
| 159 * " at ", Identifier, | 164 * " at ", Identifier, |
| 160 * (" where ", LogicalExpression) | " anywhere", | 165 * [" with ", WithClause], |
| 161 * [" with ", WithClause]; | 166 * (" where ", LogicalExpression) | " anywhere"; |
| 162 * </pre> | 167 * </pre> |
| 163 * | 168 * |
| 164 */ | 169 */ |
| 165 typedef struct { | 170 typedef struct { |
| 166 /** | 171 /** |
