FilterOps.
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std::optional< QString > | parseNull (const QString &filter_str, const bool to_clean=true) noexcept |
| Parses a filter for NULL or NOT NULL final values.
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std::optional< QString > | parseNumericFilter (const QString &filter_str) noexcept |
| Parses a filter for a log field with integer type.
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std::optional< QString > | parseTextualFilter (const QString &filter_str) noexcept |
| Parses a filter for a log field with text type.
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FilterOps.
Operations on query filters
◆ parseNull()
std::optional< QString > FilterOps::parseNull |
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const QString & | filter_str, |
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const bool | to_clean = true ) |
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noexcept |
Parses a filter for NULL or NOT NULL final values.
Auxiliar function. Returns a value only if the string can be reduce to 'NULL' or 'NOT NULL', in any other case an empty object is returned.
- Parameters
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field_str | The string to parse |
to_clean | Whether the filter_str should be cleaned before parsing (trimmed and uppercased) |
- Returns
- The resulting filter to apply to the query, if valid
◆ parseNumericFilter()
std::optional< QString > FilterOps::parseNumericFilter |
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const QString & | filter_str | ) |
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noexcept |
Parses a filter for a log field with integer type.
The filter can be composed by anumber or by a comparison operator followed by a number. If the filter is just a number (N), it will be resolved to '= N'. Valid comparison operators are: '=' or '==', '!' or '!=', '<', '<=', '>', '>='. Literal comparison operators can be use as well: 'eq', 'ne', 'lt', 'le', 'gt', 'ge'.
- Parameters
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field_str | The given filter |
- Returns
- The resulting filter to apply to the query, if valid
◆ parseTextualFilter()
std::optional< QString > FilterOps::parseTextualFilter |
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const QString & | filter_str | ) |
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noexcept |
Parses a filter for a log field with text type.
Any filter not resolving to NULL or NOT NULL will be used as is. If the filter is exactly '*', il will be resolved as NOT NULL.
- Parameters
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field_str | The given filter |
- Returns
- The resulting filter to apply to the query, if valid