engine

type Column ¶

type Column struct {
	Name   string
	Type   token.Token
	Values []ValueInterface
}

Column - part of the Table containing name of Column and values in it

type ColumnDoesNotExistError ¶ added in v1.0.0

type ColumnDoesNotExistError struct {
	// contains filtered or unexported fields
}

ColumnDoesNotExistError - error thrown when user tries to make operation on un-existing column

func (m *ColumnDoesNotExistError) Error() string

type DbEngine ¶

type DbEngine struct {
	Tables Tables
}

func New() *DbEngine

func (engine *DbEngine) Evaluate(sequences *ast.Sequence) (string, error)

type IntegerValue ¶ added in v0.0.2

type IntegerValue struct {
	Value int
}

IntegerValue - Implementation of ValueInterface that is containing integer values

func (value IntegerValue) GetType() SupportedTypes

func (value IntegerValue) IsEqual(valueInterface ValueInterface) bool

func (value IntegerValue) ToString() string

type InvalidNumberOfParametersError ¶ added in v1.0.0

type InvalidNumberOfParametersError struct {
	// contains filtered or unexported fields
}

InvalidNumberOfParametersError - error thrown when user provides invalid number of expected parameters (ex. fewer values in insert than defined )

func (m *InvalidNumberOfParametersError) Error() string

type InvalidValueTypeError ¶ added in v1.0.0

type InvalidValueTypeError struct {
	// contains filtered or unexported fields
}

InvalidValueTypeError - error thrown when user provides value of different type than expected

func (m *InvalidValueTypeError) Error() string

type NullValue ¶ added in v1.0.0

type NullValue struct {
}

NullValue - Implementation of ValueInterface that is containing null

func (value NullValue) GetType() SupportedTypes

func (value NullValue) IsEqual(valueInterface ValueInterface) bool

func (value NullValue) ToString() string

type Rows ¶ added in v1.0.0

type Rows struct {
	// contains filtered or unexported fields
}

Rows - Contain rows that store values, alternative to Table, some operations are easier

func MapTableToRows(table *Table) Rows

type StringValue ¶ added in v0.0.2

type StringValue struct {
	Value string
}

StringValue - Implementation of ValueInterface that is containing string values

func (value StringValue) GetType() SupportedTypes

func (value StringValue) IsEqual(valueInterface ValueInterface) bool

func (value StringValue) ToString() string

type SupportedTypes ¶ added in v0.0.2

type SupportedTypes int

type Table ¶ added in v0.0.2

type Table struct {
	Columns []*Column
}

Table - Contain Columns that store values in engine

func (table *Table) ToString() string

type TableAlreadyExistsError ¶ added in v1.0.0

type TableAlreadyExistsError struct {
	// contains filtered or unexported fields
}

TableAlreadyExistsError - error thrown when user tries to create table using name that already exists in database

func (m *TableAlreadyExistsError) Error() string

type TableDoesNotExistError ¶ added in v1.0.0

type TableDoesNotExistError struct {
	// contains filtered or unexported fields
}

TableDoesNotExistError - error thrown when user tries to make operation on un-existing table

func (m *TableDoesNotExistError) Error() string

type Tables ¶ added in v1.0.0

type Tables map[string]*Table

type UnsupportedCommandTypeFromParserError ¶ added in v1.0.0

type UnsupportedCommandTypeFromParserError struct {
	// contains filtered or unexported fields
}

UnsupportedCommandTypeFromParserError - error thrown when engine found unsupported command from parser

func (m *UnsupportedCommandTypeFromParserError) Error() string

type UnsupportedConditionalTokenError ¶ added in v1.0.0

type UnsupportedConditionalTokenError struct {
	// contains filtered or unexported fields
}

UnsupportedConditionalTokenError - error thrown when engine found unsupported conditional token inside expression (supported are: EQUAL, NOT)

func (m *UnsupportedConditionalTokenError) Error() string

type UnsupportedExpressionTypeError ¶ added in v1.0.0

type UnsupportedExpressionTypeError struct {
	// contains filtered or unexported fields
}

UnsupportedExpressionTypeError - error thrown when engine found unsupported expression type

func (m *UnsupportedExpressionTypeError) Error() string

type UnsupportedOperationTokenError ¶ added in v1.0.0

type UnsupportedOperationTokenError struct {
	// contains filtered or unexported fields
}

UnsupportedOperationTokenError - error thrown when engine found unsupported operation token (supported are: AND, OR)

func (m *UnsupportedOperationTokenError) Error() string

type UnsupportedValueType ¶ added in v1.0.0

type UnsupportedValueType struct {
	// contains filtered or unexported fields
}

UnsupportedValueType - error thrown when engine found unsupported data type to be stored inside the columns

func (m *UnsupportedValueType) Error() string

type ValueInterface ¶ added in v0.0.2

type ValueInterface interface {
	ToString() string
	GetType() SupportedTypes
	IsEqual(valueInterface ValueInterface) bool
	// contains filtered or unexported methods
}

ValueInterface - Represent all supported types of data that can be inserted into Table