Op

source: bluebase/ql/op.py

Operators.

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class QlOp(refs: set[str])

Bases: ABC

Variables:

• refs (set[str])

• opened (bool)

• executed (bool)

• loop_count (int)

• row_count (int)

__iter__() → Iterator[QlRow]

op를 순회하는 iterator를 반환합니다.

static get_row(ref: str, schema: QlSchema, record: RmRecord) → QlRow

abstract property attrs: list[QlAttr]read-only

open() → None

Raises:

QlOpenedOpOpenError –

close() → None

Raises:

QlClosedOpAccessError –

next() → QlRow | None

Raises:

• QlClosedOpAccessError –

• StopIteration –

abstractmethod get_next() → QlRow | None

analysis() → str

abstractmethod explain(depth: int = 0) → str

class QlLeafOp(context: QlContext, ref: str, cond: QlValueCond | None = None)

Bases: QlOp, ABC

Variables:

• context (QlContext)

• ref (str)

• cond (QlValueCond | None)

property schema: QlSchemaread-only

class QlBranchOp(refs: set[str])

Bases: QlOp, ABC

class QlFileScanOp(context: QlContext, ref: str, cond: QlValueCond | None = None)

Bases: QlLeafOp

Variables:

• file (RmFile | None)

• scan (RmFileScan | None)

• predicate (RmPredicate | None)

property attrs: list[QlAttr]read-only

assignmentopen() → None

assignmentclose() → None

assignmentget_next() → QlRow | None

explain(depth: int = 0) → str

class QlIndexScanOp(context: QlContext, ref: str, cond: QlValueCond)

Bases: QlLeafOp

Variables:

• file (RmFile | None)

• index (IxIndex | None)

• scan (IxIndexScan | None)

• predicate (Predicate)

property attrs: list[QlAttr]read-only

assignmentopen() → None

assignmentclose() → None

assignmentget_next() → QlRow | None

explain(depth: int = 0) → str

class QlCartesianOp(left_op: QlOp, right_op: QlLeafOp)

Bases: QlBranchOp

Variables:

• left_op (QlOp)

• right_op (QlLeafOp)

• left_row (QlRow | None)

property attrs: list[QlAttr]read-only

optional_advance() → None

Hint

이런 함수가 있으면 편하다!

assignmentopen() → None

assignmentclose() → None

assignmentget_next() → QlRow | None

explain(depth: int = 0) → str

class QlLoopJoinOp(left_op: QlOp, right_op: QlLeafOp, on: QlAttrCond)

Bases: QlBranchOp

Variables:

• left_op (QlOp)

• right_op (QlLeafOp)

• on (QlAttrCond)

• left_row (QlRow | None)

property attrs: list[QlAttr]read-only

optional_advance() → None

Hint

이런 함수가 있으면 편하다!

assignmentopen() → None

assignmentclose() → None

assignmentget_next() → QlRow | None

explain(depth: int = 0) → str

class QlHashJoinOp(probe_op: QlOp, probe_attr: QlAttr, build_op: QlLeafOp, build_attr: QlAttr, on: QlAttrCond)

Bases: QlBranchOp

Variables:

• probe_op (QlOp)

• probe_attr (QlAttr)

• build_op (QlLeafOp)

• build_attr (QlAttr)

• on (QlAttrCond)

• probe_row (QlRow | None)

• build_rows (list[QlRow])

• lookup (dict[bytes, list[QlRow]] | None)

property attrs: list[QlAttr]read-only

optional_advance() → None

Hint

이런 함수가 있으면 편하다!

optional_pack(value: bool | int | float | str) → bytes

Hint

이런 함수가 있으면 편하다!

optional_build() → None

Hint

이런 함수가 있으면 편하다!

assignmentopen() → None

assignmentclose() → None

assignmentget_next() → QlRow | None

explain(depth: int = 0) → str

class QlIndexJoinOp(context: QlContext, outer_op: QlOp, outer_attr: QlAttr, inner_op: QlLeafOp, inner_attr: QlAttr, on: QlAttrCond)

Bases: QlBranchOp

Variables:

• outer_op (QlOp)

• outer_attr (QlAttr)

• inner_op (QlLeafOp)

• inner_attr (QlAttr)

• on (QlCond)

• file (RmFile | None)

• index (IxIndex | None)

• scan (IxIndexScan | None)

• outer_row (QlRow | None)

property attrs: list[QlAttr]read-only

optional_advance() → None

Hint

이런 함수가 있으면 편하다!

assignmentopen() → None

assignmentclose() → None

assignmentget_next() → QlRow | None

explain(depth: int = 0) → str

class QlFilterOp(child: QlOp, conds: list[QlCond])

Bases: QlBranchOp

Variables:

• child (QlOp)

• conds (list[QlCond])

property attrs: list[QlAttr]read-only

open() → None

Raises:

QlOpenedOpOpenError –

close() → None

Raises:

QlClosedOpAccessError –

assignmentget_next() → QlRow | None

explain(depth: int = 0) → str

class QlProjectOp(child: QlOp, attrs: list[QlAttr])

Bases: QlBranchOp

Variables:

child (QlOp)

property attrs: list[QlAttr]read-only

open() → None

Raises:

QlOpenedOpOpenError –

close() → None

Raises:

QlClosedOpAccessError –

assignmentget_next() → QlRow | None

explain(depth: int = 0) → str