| Package | Description |
|---|---|
| org.apache.flink.table.api |
| Modifier and Type | Field and Description |
|---|---|
static ApiExpression |
Expressions.CURRENT_RANGE
Offset constant to be used in the
following clause of Over windows. |
static ApiExpression |
Expressions.CURRENT_ROW
Offset constant to be used in the
following clause of Over windows. |
static ApiExpression |
Expressions.UNBOUNDED_RANGE
Offset constant to be used in the
preceding clause of unbounded Over windows. |
static ApiExpression |
Expressions.UNBOUNDED_ROW
Offset constant to be used in the
preceding clause of unbounded Over windows. |
| Modifier and Type | Method and Description |
|---|---|
static ApiExpression |
Expressions.$(String name)
Creates an unresolved reference to a table's column.
|
static ApiExpression |
Expressions.and(Object predicate0,
Object predicate1,
Object... predicates)
Boolean AND in three-valued logic.
|
static ApiExpression |
Expressions.array(Object head,
Object... tail)
Creates an array of literals.
|
static ApiExpression |
Expressions.atan2(Object y,
Object x)
Calculates the arc tangent of a given coordinate.
|
static ApiExpression |
Expressions.call(Class<? extends org.apache.flink.table.functions.UserDefinedFunction> function,
Object... arguments)
A call to an unregistered, inline function.
|
static ApiExpression |
Expressions.call(String path,
Object... arguments)
A call to a function that will be looked up in a catalog.
|
static ApiExpression |
Expressions.call(org.apache.flink.table.functions.UserDefinedFunction function,
Object... arguments)
A call to an unregistered, inline function.
|
static ApiExpression |
Expressions.callSql(String sqlExpression)
A call to a SQL expression.
|
static ApiExpression |
Expressions.coalesce(Object... args)
Returns the first argument that is not NULL.
|
static ApiExpression |
Expressions.col(String name)
Creates an unresolved reference to a table's column.
|
static ApiExpression |
Expressions.concat(Object string,
Object... strings)
Returns the string that results from concatenating the arguments.
|
static ApiExpression |
Expressions.concatWs(Object separator,
Object string,
Object... strings)
Returns the string that results from concatenating the arguments and separator.
|
static ApiExpression |
Expressions.currentDatabase()
Return the current database, the return type of this expression is
DataTypes.STRING(). |
static ApiExpression |
Expressions.currentDate()
Returns the current SQL date in local time zone, the return type of this expression is
DataTypes.DATE(). |
static ApiExpression |
Expressions.currentTime()
Returns the current SQL time in local time zone, the return type of this expression is
DataTypes.TIME(). |
static ApiExpression |
Expressions.currentTimestamp()
Returns the current SQL timestamp in local time zone, the return type of this expression is
DataTypes.TIMESTAMP_WITH_LOCAL_TIME_ZONE(). |
static ApiExpression |
Expressions.currentWatermark(Object rowtimeAttribute)
Returns the current watermark for the given rowtime attribute, or
NULL if no common
watermark of all upstream operations is available at the current operation in the pipeline. |
static ApiExpression |
Expressions.dateFormat(Object timestamp,
Object format)
Formats a timestamp as a string using a specified format.
|
static ApiExpression |
Expressions.e()
Returns a value that is closer than any other value to e.
|
static ApiExpression |
Expressions.fromUnixtime(Object unixtime)
Convert unix timestamp (seconds since '1970-01-01 00:00:00' UTC) to datetime string in the
"yyyy-MM-dd HH:mm:ss" format.
|
static ApiExpression |
Expressions.fromUnixtime(Object unixtime,
Object format)
Convert unix timestamp (seconds since '1970-01-01 00:00:00' UTC) to datetime string in the
given format.
|
static ApiExpression |
Expressions.ifThenElse(Object condition,
Object ifTrue,
Object ifFalse)
Ternary conditional operator that decides which of two other expressions should be evaluated
based on a evaluated boolean condition.
|
static ApiExpression |
Expressions.jsonArray(org.apache.flink.table.api.JsonOnNull onNull,
Object... values)
Builds a JSON array string from a list of values.
|
static ApiExpression |
Expressions.jsonArrayAgg(org.apache.flink.table.api.JsonOnNull onNull,
Object itemExpr)
Builds a JSON object string by aggregating items into an array.
|
static ApiExpression |
Expressions.jsonObject(org.apache.flink.table.api.JsonOnNull onNull,
Object... keyValues)
Builds a JSON object string from a list of key-value pairs.
|
static ApiExpression |
Expressions.jsonObjectAgg(org.apache.flink.table.api.JsonOnNull onNull,
Object keyExpr,
Object valueExpr)
Builds a JSON object string by aggregating key-value expressions into a single JSON object.
|
static ApiExpression |
Expressions.jsonString(Object value)
Serializes a value into JSON.
|
static ApiExpression |
Expressions.lit(Object v)
Creates a SQL literal.
|
static ApiExpression |
Expressions.lit(Object v,
org.apache.flink.table.types.DataType dataType)
Creates a SQL literal of a given
DataType. |
static ApiExpression |
Expressions.localTime()
Returns the current SQL time in local time zone, the return type of this expression is
DataTypes.TIME(), this is a synonym for Expressions.currentTime(). |
static ApiExpression |
Expressions.localTimestamp()
Returns the current SQL timestamp in local time zone, the return type of this expression is
DataTypes.TIMESTAMP(). |
static ApiExpression |
Expressions.log(Object value)
Calculates the logarithm of the given value.
|
static ApiExpression |
Expressions.log(Object base,
Object value)
Calculates the logarithm of the given value to the given base.
|
static ApiExpression |
Expressions.map(Object key,
Object value,
Object... tail)
Creates a map of expressions.
|
static ApiExpression |
Expressions.negative(Object v)
Returns negative numeric.
|
static ApiExpression |
Expressions.not(Object expression)
Inverts a given boolean expression.
|
static ApiExpression |
Expressions.nullOf(org.apache.flink.table.types.DataType dataType)
Returns a null literal value of a given data type.
|
static ApiExpression |
Expressions.nullOf(org.apache.flink.api.common.typeinfo.TypeInformation<?> typeInfo)
Deprecated.
This method will be removed in future versions as it uses the old type system. It
is recommended to use
Expressions.nullOf(DataType) instead which uses the new type system
based on DataTypes. Please make sure to use either the old or the new type system
consistently to avoid unintended behavior. See the website documentation for more
information. |
static ApiExpression |
Expressions.or(Object predicate0,
Object predicate1,
Object... predicates)
Boolean OR in three-valued logic.
|
static ApiExpression |
Expressions.pi()
Returns a value that is closer than any other value to pi.
|
static ApiExpression |
Expressions.rand()
Returns a pseudorandom double value between 0.0 (inclusive) and 1.0 (exclusive).
|
static ApiExpression |
Expressions.rand(Object seed)
Returns a pseudorandom double value between 0.0 (inclusive) and 1.0 (exclusive) with a
initial seed.
|
static ApiExpression |
Expressions.randInteger(Object bound)
Returns a pseudorandom integer value between 0 (inclusive) and the specified value
(exclusive).
|
static ApiExpression |
Expressions.randInteger(Object seed,
Object bound)
Returns a pseudorandom integer value between 0 (inclusive) and the specified value
(exclusive) with a initial seed.
|
static ApiExpression |
Expressions.range(int start,
int end)
Indicates an index based range, which can be used in columns selection.
|
static ApiExpression |
Expressions.range(String start,
String end)
Indicates a range from 'start' to 'end', which can be used in columns selection.
|
static ApiExpression |
Expressions.row(Object head,
Object... tail)
Creates a row of expressions.
|
static ApiExpression |
Expressions.rowInterval(Long rows)
Creates an interval of rows.
|
static ApiExpression |
Expressions.sourceWatermark()
Source watermark declaration for
Schema. |
static ApiExpression |
Expressions.temporalOverlaps(Object leftTimePoint,
Object leftTemporal,
Object rightTimePoint,
Object rightTemporal)
Determines whether two anchored time intervals overlap.
|
static ApiExpression |
Expressions.timestampDiff(org.apache.flink.table.expressions.TimePointUnit timePointUnit,
Object timePoint1,
Object timePoint2)
Returns the (signed) number of
TimePointUnit between timePoint1 and timePoint2. |
protected ApiExpression |
ApiExpression.toApiSpecificExpression(org.apache.flink.table.expressions.Expression expression) |
static ApiExpression |
Expressions.toTimestampLtz(Object numericEpochTime,
Object precision)
Converts a numeric type epoch time to
DataTypes.TIMESTAMP_LTZ(int). |
static ApiExpression |
Expressions.uuid()
Returns an UUID (Universally Unique Identifier) string (e.g.,
"3d3c68f7-f608-473f-b60c-b0c44ad4cc4e") according to RFC 4122 type 4 (pseudo randomly
generated) UUID.
|
static ApiExpression |
Expressions.withColumns(Object head,
Object... tail)
Creates an expression that selects a range of columns.
|
static ApiExpression |
Expressions.withoutColumns(Object head,
Object... tail)
Creates an expression that selects all columns except for the given range of columns.
|
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