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sql: expression: function: Add CEIL, CEILING, FLOOR. [Fixes Half src-…
…d#393] Signed-off-by: Theodoros Zarkopafilis Ntakouris <zarkopafilis@gmail.com>
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module gopkg.in/src-d/go-mysql-server.v0 | ||
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require ( | ||
github.com/BurntSushi/toml v0.3.1 // indirect | ||
github.com/CAFxX/gcnotifier v0.0.0-20170518020117-39b0596a2da3 // indirect | ||
github.com/DataDog/datadog-go v0.0.0-20180822151419-281ae9f2d895 // indirect | ||
github.com/StackExchange/wmi v0.0.0-20180725035823-b12b22c5341f // indirect | ||
github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da // indirect | ||
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 // indirect | ||
github.com/boltdb/bolt v1.3.1 | ||
github.com/cespare/xxhash v1.1.0 // indirect | ||
github.com/circonus-labs/circonus-gometrics v2.2.4+incompatible // indirect | ||
github.com/circonus-labs/circonusllhist v0.0.0-20180430145027-5eb751da55c6 // indirect | ||
github.com/go-ole/go-ole v1.2.1 // indirect | ||
github.com/gogo/protobuf v1.1.1 // indirect | ||
github.com/google/go-cmp v0.2.0 // indirect | ||
github.com/gorilla/context v1.1.1 // indirect | ||
github.com/gorilla/handlers v1.4.0 // indirect | ||
github.com/gorilla/mux v1.6.2 // indirect | ||
github.com/hashicorp/consul v1.2.3 // indirect | ||
github.com/hashicorp/go-cleanhttp v0.5.0 // indirect | ||
github.com/hashicorp/go-immutable-radix v1.0.0 // indirect | ||
github.com/hashicorp/go-msgpack v0.0.0-20150518234257-fa3f63826f7c // indirect | ||
github.com/hashicorp/go-multierror v1.0.0 // indirect | ||
github.com/hashicorp/go-retryablehttp v0.0.0-20180718195005-e651d75abec6 // indirect | ||
github.com/hashicorp/go-sockaddr v0.0.0-20180320115054-6d291a969b86 // indirect | ||
github.com/hashicorp/memberlist v0.1.0 // indirect | ||
github.com/hashicorp/serf v0.8.1 // indirect | ||
github.com/hashicorp/yamux v0.0.0-20180917205041-7221087c3d28 // indirect | ||
github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect | ||
github.com/miekg/dns v1.0.12 // indirect | ||
github.com/mitchellh/hashstructure v1.0.0 | ||
github.com/opentracing/opentracing-go v1.0.2 | ||
github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c // indirect | ||
github.com/pelletier/go-toml v1.2.0 // indirect | ||
github.com/pilosa/pilosa v1.1.0 | ||
github.com/pkg/errors v0.8.0 // indirect | ||
github.com/prometheus/client_golang v0.8.0 // indirect | ||
github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910 // indirect | ||
github.com/prometheus/common v0.0.0-20180801064454-c7de2306084e // indirect | ||
github.com/prometheus/procfs v0.0.0-20180920065004-418d78d0b9a7 // indirect | ||
github.com/satori/go.uuid v1.2.0 // indirect | ||
github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529 // indirect | ||
github.com/shirou/gopsutil v2.17.12+incompatible // indirect | ||
github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 // indirect | ||
github.com/sirupsen/logrus v1.1.0 | ||
github.com/spf13/cast v1.2.0 | ||
github.com/stretchr/testify v1.2.2 | ||
github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926 // indirect | ||
golang.org/x/net v0.0.0-20180926154720-4dfa2610cdf3 // indirect | ||
google.golang.org/grpc v1.15.0 // indirect | ||
gopkg.in/src-d/go-errors.v1 v1.0.0 | ||
gopkg.in/src-d/go-vitess.v1 v1.1.0 | ||
gopkg.in/vmihailenco/msgpack.v2 v2.9.1 // indirect | ||
gopkg.in/yaml.v2 v2.2.1 | ||
) |
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package function | ||
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import ( | ||
"fmt" | ||
"gopkg.in/src-d/go-mysql-server.v0/sql" | ||
"gopkg.in/src-d/go-mysql-server.v0/sql/expression" | ||
"math" | ||
"reflect" | ||
) | ||
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// Ceil returns the smallest integer value not less than X. | ||
type Ceil struct { | ||
expression.UnaryExpression | ||
} | ||
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func (c *Ceil) Resolved() bool { | ||
return c.Child.Resolved() | ||
} | ||
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func (c *Ceil) IsNullable() bool { | ||
return c.Child.IsNullable() | ||
} | ||
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func (c *Ceil) Children() []sql.Expression { | ||
return c.Child.Children() | ||
} | ||
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func NewCeil(array sql.Expression) sql.Expression { | ||
return &Ceil{expression.UnaryExpression{Child: array}} | ||
} | ||
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func (c *Ceil) Type() sql.Type { | ||
return c.Child.Type() | ||
} | ||
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func (c *Ceil) String() string { | ||
return fmt.Sprintf("CEIL(%s)", c.Child) | ||
} | ||
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// TransformUp implements the Expression interface. | ||
func (c *Ceil) TransformUp(fn sql.TransformExprFunc) (sql.Expression, error) { | ||
child, err := c.Child.TransformUp(fn) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return fn(NewArrayLength(child)) | ||
} | ||
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// Eval implements the Expression interface. | ||
func (c *Ceil) Eval(ctx *sql.Context, row sql.Row) (interface{}, error) { | ||
if !sql.IsNumber(c.Child.Type()) { | ||
return nil, sql.ErrInvalidType.New(c.Child.Type().Type().String()) | ||
} | ||
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child, err := c.Child.Eval(ctx, row) | ||
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if !sql.IsDecimal(c.Child.Type()) { | ||
return child, err | ||
} | ||
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if err != nil { | ||
return nil, err | ||
} | ||
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if child == nil { | ||
return nil, nil | ||
} | ||
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switch num := child.(type) { | ||
case float64: | ||
return math.Ceil(num), nil | ||
case float32: | ||
return float32(math.Ceil(float64(num))), nil | ||
default: | ||
return nil, sql.ErrInvalidType.New(reflect.TypeOf(num)) | ||
} | ||
} | ||
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// Floor returns the biggest integer value not less than X. | ||
type Floor struct { | ||
expression.UnaryExpression | ||
} | ||
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func (f *Floor) Resolved() bool { | ||
return f.Child.Resolved() | ||
} | ||
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func (f *Floor) IsNullable() bool { | ||
return f.Child.IsNullable() | ||
} | ||
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func (f *Floor) Children() []sql.Expression { | ||
return f.Child.Children() | ||
} | ||
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func NewFloor(array sql.Expression) sql.Expression { | ||
return &Floor{expression.UnaryExpression{Child: array}} | ||
} | ||
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func (f *Floor) Type() sql.Type { | ||
return f.Child.Type() | ||
} | ||
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func (f *Floor) String() string { | ||
return fmt.Sprintf("FLOOR(%s)", f.Child) | ||
} | ||
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// TransformUp implements the Expression interface. | ||
func (f *Floor) TransformUp(fn sql.TransformExprFunc) (sql.Expression, error) { | ||
child, err := f.Child.TransformUp(fn) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return fn(NewArrayLength(child)) | ||
} | ||
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// Eval implements the Expression interface. | ||
func (f *Floor) Eval(ctx *sql.Context, row sql.Row) (interface{}, error) { | ||
if !sql.IsNumber(f.Child.Type()) { | ||
return nil, sql.ErrInvalidType.New(f.Child.Type().Type().String()) | ||
} | ||
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child, err := f.Child.Eval(ctx, row) | ||
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if !sql.IsDecimal(f.Child.Type()) { | ||
return child, err | ||
} | ||
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if err != nil { | ||
return nil, err | ||
} | ||
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if child == nil { | ||
return nil, nil | ||
} | ||
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switch num := child.(type) { | ||
case float64: | ||
return math.Floor(num), nil | ||
case float32: | ||
return float32(math.Floor(float64(num))), nil | ||
default: | ||
return nil, sql.ErrInvalidType.New(reflect.TypeOf(num)) | ||
} | ||
} |
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