Queries
One of the key features of GigaMap is that you can query data before it is loaded.
Queries are executed on the index; then, while traversing the results, all relevant segments of GigaMap’s data are loaded lazily.
The indexer instances are utilized to create query conditions.
Each of them comes with specialized query methods.
Query methods
Common
| Method | Description |
|---|---|
is(K key) |
equality condition |
not(K key) |
inequality condition |
isNull() |
null check condition |
notNull() |
negated null check condition |
like(E sample) |
equality condition which compares the key of this index with the same key of given sample, not to confuse with SQL-like |
unlike(E sample) |
inequality condition, see like |
in(K… keys) |
equality condition which checks against a collection of keys |
notIn(K… keys) |
inequality condition which checks against a collection of keys |
is(Predicate<K> predicate) |
equality condition with a custom predicate |
String
| Method | Description |
|---|---|
contains(String search) |
case-sensitive contains condition |
containsIgnoreCase(String search) |
case-insensitive contains condition |
startsWith(String prefix) |
case-sensitive starts with condition |
startsWithIgnoreCase(String prefix) |
case-insensitive starts with condition |
endsWith(String suffix) |
case-sensitive ends with condition |
endsWithIgnoreCase(String suffix) |
case-insensitive ends with condition |
isEmpty() |
checks for null or empty String |
isBlank() |
checks for null or blank String |
Numeric
| Method | Description |
|---|---|
lessThan(K boundExclusive) |
numeric condition < |
lessThanEqual(K boundInclusive) |
numeric condition ⇐ |
greaterThan(K boundExclusive) |
numeric condition > |
greaterThanEqual(K boundInclusive) |
numeric condition >= |
between(K startInclusive, K endInclusive) |
numeric condition, startInclusive ⇐ key ⇐ endInclusive |
Common Temporal
| Method | Description |
|---|---|
before(K boundExclusive) |
temporal condition < |
beforeEqual(K boundInclusive) |
temporal condition ⇐ |
after(K boundExclusive) |
temporal condition > |
afterEqual(K boundInclusive) |
temporal condition >= |
between(K startInclusive, K endInclusive) |
temporal condition, startInclusive ⇐ key ⇐ endInclusive |
Date
| Method | Description |
|---|---|
isDate(int year, int month, int day) |
date equality check |
isYear(int year) |
compares only the year |
isMonth(int month) |
compares only the month |
isDay(int day) |
compares only the day |
Time
| Method | Description |
|---|---|
isTime(int hour, int minute, int second) |
time equality check |
isHour(int hour) |
compares only the hour |
isMinute(int minute) |
compares only the minute |
isSecond(int second) |
compares only the second |