feat(sqltypes): add nullable SQL types with automatic casting

* Introduced SqlNull type for nullable values with auto-casting.
* Implemented JSON, YAML, and XML marshaling/unmarshaling.
* Added specific types for common SQL types (e.g., SqlInt64, SqlString).
* Included utility functions for creating nullable types.
* Added SqlTimeStamp, SqlDate, and SqlTime types with custom formatting.

vendor/git.warky.dev/wdevs/relspecgo/LICENSE

@@ -0,0 +1,73 @@
+Apache License
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+http://www.apache.org/licenses/
+
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+9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability.
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+
+To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!)  The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives.
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+Copyright 2025 wdevs
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vendor/git.warky.dev/wdevs/relspecgo/pkg/sqltypes/README.md

@@ -0,0 +1,136 @@
+# sqltypes
+
+Nullable SQL types for hand-written or generated Go models. Each type wraps a
+value with a `Valid` flag and implements `database/sql.Scanner`,
+`driver.Valuer`, `encoding/json`, `gopkg.in/yaml.v3`, and `encoding/xml`
+marshalling — so a single struct field can be scanned from a database row,
+round-tripped through JSON/YAML/XML, and written back to the database without
+any per-format glue code.
+
+This package is what the `bun` and `gorm` writers emit when generating models
+with `--types sqltypes` (see [`pkg/writers/bun`](../writers/bun/README.md) and
+[`pkg/writers/gorm`](../writers/gorm/README.md)). It can also be imported
+directly in hand-written models.
+
+## Import
+
+```go
+import sql_types "git.warky.dev/wdevs/relspecgo/pkg/sqltypes"
+```
+
+## Scalar types
+
+All scalar types are instantiations of the generic `SqlNull[T]`:
+
+| Type | Underlying | Typical SQL type |
+|---|---|---|
+| `SqlInt16` | `int16` | `smallint` |
+| `SqlInt32` | `int32` | `integer` |
+| `SqlInt64` | `int64` | `bigint` |
+| `SqlFloat32` | `float32` | `real`, `float4` |
+| `SqlFloat64` | `float64` | `double precision`, `numeric`, `decimal`, `money` |
+| `SqlBool` | `bool` | `boolean` |
+| `SqlString` | `string` | `text`, `varchar`, `char`, `citext`, `inet`, `cidr`, `macaddr` |
+| `SqlByteArray` | `[]byte` | `bytea` (base64-encoded in JSON/YAML/XML) |
+| `SqlUUID` | `uuid.UUID` (`github.com/google/uuid`) | `uuid` |
+
+You can also instantiate `SqlNull[T]` directly for any type not covered
+above, e.g. `SqlNull[MyEnum]`.
+
+### Date/time types
+
+Plain `time.Time` doesn't distinguish date-only, time-only, and timestamp
+semantics, and its zero value marshals to a confusing `0001-01-01T00:00:00Z`.
+These wrapper types fix both problems:
+
+| Type | Format | Notes |
+|---|---|---|
+| `SqlTimeStamp` | `2006-01-02T15:04:05` | Full timestamp |
+| `SqlDate` | `2006-01-02` | Date only |
+| `SqlTime` | `15:04:05` | Time only |
+
+Zero/pre-epoch values (`time.Time{}` or anything before `0002-01-01`) marshal
+to `null` and `Value()` returns `nil`, instead of leaking Go's zero-time
+sentinel into the database or API responses.
+
+### JSON types
+
+| Type | Underlying | Notes |
+|---|---|---|
+| `SqlJSONB` | `[]byte` | Raw JSON bytes; `MarshalYAML` decodes to native YAML mappings/sequences instead of an embedded JSON string |
+| `SqlJSON` | `= SqlJSONB` | Alias — PostgreSQL's `json` and `jsonb` share the same Go representation |
+
+`SqlJSONB` has `AsMap()` / `AsSlice()` helpers for pulling out
+`map[string]any` / `[]any` without a separate `json.Unmarshal` call.
+
+### Vector type (pgvector)
+
+`SqlVector` wraps `[]float32` for the `vector` column type ([pgvector](https://github.com/pgvector/pgvector)),
+scanning/writing the `[1,2,3]` literal format pgvector uses over the wire.
+
+## Array types
+
+PostgreSQL array columns (`text[]`, `integer[]`, …) map to `SqlXxxArray`
+types, each wrapping `Val []T` + `Valid bool` and handling PostgreSQL's
+`{a,b,c}` array literal format on `Scan`/`Value`:
+
+`SqlStringArray`, `SqlInt16Array`, `SqlInt32Array`, `SqlInt64Array`,
+`SqlFloat32Array`, `SqlFloat64Array`, `SqlBoolArray`, `SqlUUIDArray`.
+
+## Constructing values
+
+Every type has a `NewSqlXxx(v)` constructor that sets `Valid: true`:
+
+```go
+name := sql_types.NewSqlString("Ada Lovelace")
+age  := sql_types.NewSqlInt32(36)
+tags := sql_types.NewSqlStringArray([]string{"engineer", "mathematician"})
+```
+
+The zero value of any type (`sql_types.SqlString{}`) is null/invalid — use it
+directly for a `NULL` field instead of a separate constructor.
+
+Generic helpers:
+
+```go
+sql_types.Null(v, valid)      // SqlNull[T]{Val: v, Valid: valid}
+sql_types.NewSql[T](anyValue) // best-effort conversion from any Go value
+```
+
+## Reading values back
+
+Each scalar type has typed accessors that return the zero value instead of
+panicking when `Valid` is false:
+
+```go
+n.Int64()   // SqlInt16/32/64, SqlFloat32/64, SqlBool, SqlString → int64
+n.Float64() // → float64
+n.Bool()    // → bool
+n.Time()    // SqlNull[time.Time]-based types → time.Time
+n.UUID()    // SqlUUID → uuid.UUID
+n.String()  // fmt.Stringer — empty string when invalid
+```
+
+## Example
+
+```go
+type User struct {
+    ID        sql_types.SqlUUID        `json:"id"`
+    Name      sql_types.SqlString      `json:"name"`
+    Tags      sql_types.SqlStringArray `json:"tags"`
+    Metadata  sql_types.SqlJSONB       `json:"metadata"`
+    CreatedAt sql_types.SqlTimeStamp   `json:"created_at"`
+}
+
+u := User{
+    ID:        sql_types.NewSqlUUID(uuid.New()),
+    Name:      sql_types.NewSqlString("Ada Lovelace"),
+    Tags:      sql_types.NewSqlStringArray([]string{"engineer"}),
+    CreatedAt: sql_types.SqlTimeStampNow(),
+}
+// Metadata left as the zero value → serializes as null, scans as NULL.
+```
+
+Every type implements `sql.Scanner` and `driver.Valuer`, so these fields can
+be used directly as struct fields with `database/sql`, `bun`, or `gorm`
+without additional tags or hooks.

vendor/git.warky.dev/wdevs/relspecgo/pkg/sqltypes/sql_array_types.go

@@ -1,15 +1,85 @@
-package spectypes
+package sqltypes
 
 import (
 	"database/sql/driver"
 	"encoding/json"
+	"encoding/xml"
 	"fmt"
 	"strconv"
 	"strings"
 
 	"github.com/google/uuid"
+	"gopkg.in/yaml.v3"
 )
 
+// marshalYAMLSlice returns the value used by yaml.Marshaler implementations
+// for the nullable array types below: nil when invalid, the slice otherwise.
+func marshalYAMLSlice[T any](valid bool, vals []T) (any, error) {
+	if !valid {
+		return nil, nil
+	}
+	return vals, nil
+}
+
+// unmarshalYAMLSlice returns the value used by yaml.Unmarshaler
+// implementations for the nullable array types below.
+func unmarshalYAMLSlice[T any](value *yaml.Node) (vals []T, valid bool, err error) {
+	if value == nil || value.Tag == "!!null" {
+		return nil, false, nil
+	}
+	if err := value.Decode(&vals); err != nil {
+		return nil, false, err
+	}
+	return vals, true, nil
+}
+
+// xmlArrayItemName is the element name used for each item when a nullable
+// array type is encoded as XML, since XML has no native list type.
+var xmlArrayItemName = xml.Name{Local: "item"}
+
+// marshalXMLSlice writes a nullable array type as XML: an empty element when
+// invalid, otherwise the start tag followed by one <item> child per element.
+func marshalXMLSlice[T any](e *xml.Encoder, start xml.StartElement, valid bool, vals []T) error {
+	if !valid {
+		return e.EncodeElement("", start)
+	}
+	if err := e.EncodeToken(start); err != nil {
+		return err
+	}
+	for _, v := range vals {
+		if err := e.EncodeElement(v, xml.StartElement{Name: xmlArrayItemName}); err != nil {
+			return err
+		}
+	}
+	return e.EncodeToken(start.End())
+}
+
+// unmarshalXMLSlice reads back the XML written by marshalXMLSlice.
+//
+// XML has no native null representation: an element with no <item> children
+// unmarshals to a valid, empty slice rather than an invalid one.
+func unmarshalXMLSlice[T any](d *xml.Decoder, start xml.StartElement) ([]T, error) {
+	var vals []T
+	for {
+		tok, err := d.Token()
+		if err != nil {
+			return nil, err
+		}
+		switch t := tok.(type) {
+		case xml.StartElement:
+			var v T
+			if err := d.DecodeElement(&v, &t); err != nil {
+				return nil, err
+			}
+			vals = append(vals, v)
+		case xml.EndElement:
+			if t.Name == start.Name {
+				return vals, nil
+			}
+		}
+	}
+}
+
 // parsePostgresArrayElements parses a PostgreSQL array literal (e.g. `{a,"b,c",d}`)
 // into a slice of raw string elements. Each element retains its unquoted/unescaped value.
 func parsePostgresArrayElements(s string) ([]string, error) {
@@ -140,6 +210,32 @@ func (a *SqlStringArray) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (a SqlStringArray) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(a.Valid, a.Val)
+}
+
+func (a *SqlStringArray) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[string](value)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, valid
+	return nil
+}
+
+func (a SqlStringArray) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, a.Valid, a.Val)
+}
+
+func (a *SqlStringArray) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[string](d, start)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, true
+	return nil
+}
+
 func NewSqlStringArray(v []string) SqlStringArray {
 	return SqlStringArray{Val: v, Valid: true}
 }
@@ -215,6 +311,32 @@ func (a *SqlInt16Array) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (a SqlInt16Array) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(a.Valid, a.Val)
+}
+
+func (a *SqlInt16Array) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[int16](value)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, valid
+	return nil
+}
+
+func (a SqlInt16Array) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, a.Valid, a.Val)
+}
+
+func (a *SqlInt16Array) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[int16](d, start)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, true
+	return nil
+}
+
 func NewSqlInt16Array(v []int16) SqlInt16Array {
 	return SqlInt16Array{Val: v, Valid: true}
 }
@@ -290,6 +412,32 @@ func (a *SqlInt32Array) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (a SqlInt32Array) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(a.Valid, a.Val)
+}
+
+func (a *SqlInt32Array) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[int32](value)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, valid
+	return nil
+}
+
+func (a SqlInt32Array) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, a.Valid, a.Val)
+}
+
+func (a *SqlInt32Array) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[int32](d, start)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, true
+	return nil
+}
+
 func NewSqlInt32Array(v []int32) SqlInt32Array {
 	return SqlInt32Array{Val: v, Valid: true}
 }
@@ -365,6 +513,32 @@ func (a *SqlInt64Array) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (a SqlInt64Array) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(a.Valid, a.Val)
+}
+
+func (a *SqlInt64Array) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[int64](value)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, valid
+	return nil
+}
+
+func (a SqlInt64Array) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, a.Valid, a.Val)
+}
+
+func (a *SqlInt64Array) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[int64](d, start)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, true
+	return nil
+}
+
 func NewSqlInt64Array(v []int64) SqlInt64Array {
 	return SqlInt64Array{Val: v, Valid: true}
 }
@@ -440,6 +614,32 @@ func (a *SqlFloat32Array) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (a SqlFloat32Array) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(a.Valid, a.Val)
+}
+
+func (a *SqlFloat32Array) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[float32](value)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, valid
+	return nil
+}
+
+func (a SqlFloat32Array) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, a.Valid, a.Val)
+}
+
+func (a *SqlFloat32Array) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[float32](d, start)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, true
+	return nil
+}
+
 func NewSqlFloat32Array(v []float32) SqlFloat32Array {
 	return SqlFloat32Array{Val: v, Valid: true}
 }
@@ -515,6 +715,32 @@ func (a *SqlFloat64Array) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (a SqlFloat64Array) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(a.Valid, a.Val)
+}
+
+func (a *SqlFloat64Array) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[float64](value)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, valid
+	return nil
+}
+
+func (a SqlFloat64Array) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, a.Valid, a.Val)
+}
+
+func (a *SqlFloat64Array) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[float64](d, start)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, true
+	return nil
+}
+
 func NewSqlFloat64Array(v []float64) SqlFloat64Array {
 	return SqlFloat64Array{Val: v, Valid: true}
 }
@@ -591,6 +817,32 @@ func (a *SqlBoolArray) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (a SqlBoolArray) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(a.Valid, a.Val)
+}
+
+func (a *SqlBoolArray) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[bool](value)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, valid
+	return nil
+}
+
+func (a SqlBoolArray) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, a.Valid, a.Val)
+}
+
+func (a *SqlBoolArray) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[bool](d, start)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, true
+	return nil
+}
+
 func NewSqlBoolArray(v []bool) SqlBoolArray {
 	return SqlBoolArray{Val: v, Valid: true}
 }
@@ -666,6 +918,32 @@ func (a *SqlUUIDArray) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (a SqlUUIDArray) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(a.Valid, a.Val)
+}
+
+func (a *SqlUUIDArray) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[uuid.UUID](value)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, valid
+	return nil
+}
+
+func (a SqlUUIDArray) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, a.Valid, a.Val)
+}
+
+func (a *SqlUUIDArray) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[uuid.UUID](d, start)
+	if err != nil {
+		return err
+	}
+	a.Val, a.Valid = vals, true
+	return nil
+}
+
 func NewSqlUUIDArray(v []uuid.UUID) SqlUUIDArray {
 	return SqlUUIDArray{Val: v, Valid: true}
 }
@@ -750,6 +1028,32 @@ func (v *SqlVector) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (v SqlVector) MarshalYAML() (any, error) {
+	return marshalYAMLSlice(v.Valid, v.Val)
+}
+
+func (v *SqlVector) UnmarshalYAML(value *yaml.Node) error {
+	vals, valid, err := unmarshalYAMLSlice[float32](value)
+	if err != nil {
+		return err
+	}
+	v.Val, v.Valid = vals, valid
+	return nil
+}
+
+func (v SqlVector) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	return marshalXMLSlice(e, start, v.Valid, v.Val)
+}
+
+func (v *SqlVector) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	vals, err := unmarshalXMLSlice[float32](d, start)
+	if err != nil {
+		return err
+	}
+	v.Val, v.Valid = vals, true
+	return nil
+}
+
 func NewSqlVector(val []float32) SqlVector {
 	return SqlVector{Val: val, Valid: true}
 }

vendor/git.warky.dev/wdevs/relspecgo/pkg/sqltypes/sql_types.go

@@ -1,11 +1,12 @@
-// Package spectypes provides nullable SQL types with automatic casting and conversion methods.
-package spectypes
+// Package sqltypes provides nullable SQL types with automatic casting and conversion methods.
+package sqltypes
 
 import (
 	"database/sql"
 	"database/sql/driver"
 	"encoding/base64"
 	"encoding/json"
+	"encoding/xml"
 	"fmt"
 	"reflect"
 	"strconv"
@@ -13,6 +14,7 @@ import (
 	"time"
 
 	"github.com/google/uuid"
+	"gopkg.in/yaml.v3"
 )
 
 // tryParseDT attempts to parse a string into a time.Time using various formats.
@@ -120,15 +122,22 @@ func (n *SqlNull[T]) FromString(s string) error {
 
 	var zero T
 	switch any(zero).(type) {
-	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
+	case int, int8, int16, int32, int64:
 		if i, err := strconv.ParseInt(s, 10, 64); err == nil {
 			reflect.ValueOf(&n.Val).Elem().SetInt(i)
 			n.Valid = true
-		}
-		if f, err := strconv.ParseFloat(s, 64); err == nil {
+		} else if f, err := strconv.ParseFloat(s, 64); err == nil {
 			reflect.ValueOf(&n.Val).Elem().SetInt(int64(f))
 			n.Valid = true
 		}
+	case uint, uint8, uint16, uint32, uint64:
+		if u, err := strconv.ParseUint(s, 10, 64); err == nil {
+			reflect.ValueOf(&n.Val).Elem().SetUint(u)
+			n.Valid = true
+		} else if f, err := strconv.ParseFloat(s, 64); err == nil && f >= 0 {
+			reflect.ValueOf(&n.Val).Elem().SetUint(uint64(f))
+			n.Valid = true
+		}
 	case float32, float64:
 		if f, err := strconv.ParseFloat(s, 64); err == nil {
 			reflect.ValueOf(&n.Val).Elem().SetFloat(f)
@@ -232,6 +241,104 @@ func (n *SqlNull[T]) UnmarshalJSON(b []byte) error {
 	return fmt.Errorf("cannot unmarshal %s into SqlNull[%T]", b, n.Val)
 }
 
+// MarshalYAML implements yaml.Marshaler.
+func (n SqlNull[T]) MarshalYAML() (any, error) {
+	if !n.Valid {
+		return nil, nil
+	}
+
+	// Check if T is []byte, and encode to base64 (mirrors MarshalJSON).
+	if b, ok := any(n.Val).([]byte); ok {
+		return base64.StdEncoding.EncodeToString(b), nil
+	}
+
+	return n.Val, nil
+}
+
+// UnmarshalYAML implements yaml.Unmarshaler.
+func (n *SqlNull[T]) UnmarshalYAML(value *yaml.Node) error {
+	if value == nil || value.Tag == "!!null" {
+		n.Valid = false
+		n.Val = *new(T)
+		return nil
+	}
+
+	// Check if T is []byte, and decode from base64.
+	var zero T
+	if _, ok := any(zero).([]byte); ok {
+		var s string
+		if err := value.Decode(&s); err == nil {
+			if decoded, err := base64.StdEncoding.DecodeString(s); err == nil {
+				n.Val = any(decoded).(T)
+				n.Valid = true
+				return nil
+			}
+			n.Val = any([]byte(s)).(T)
+			n.Valid = true
+			return nil
+		}
+	}
+
+	var val T
+	if err := value.Decode(&val); err == nil {
+		n.Val = val
+		n.Valid = true
+		return nil
+	}
+
+	// Fallback: decode as string and parse.
+	var s string
+	if err := value.Decode(&s); err == nil {
+		return n.FromString(s)
+	}
+
+	return fmt.Errorf("cannot unmarshal %q into SqlNull[%T]", value.Value, n.Val)
+}
+
+// MarshalXML implements xml.Marshaler.
+func (n SqlNull[T]) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	if !n.Valid {
+		return e.EncodeElement("", start)
+	}
+
+	// Check if T is []byte, and encode to base64 (mirrors MarshalJSON).
+	if b, ok := any(n.Val).([]byte); ok {
+		return e.EncodeElement(base64.StdEncoding.EncodeToString(b), start)
+	}
+
+	return e.EncodeElement(n.Val, start)
+}
+
+// UnmarshalXML implements xml.Unmarshaler.
+//
+// XML has no native null representation, so an empty element unmarshals to
+// an invalid (null) value rather than a zero-value-but-valid one.
+func (n *SqlNull[T]) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	var s string
+	if err := d.DecodeElement(&s, &start); err != nil {
+		return err
+	}
+	if s == "" {
+		n.Valid = false
+		n.Val = *new(T)
+		return nil
+	}
+
+	var zero T
+	if _, ok := any(zero).([]byte); ok {
+		if decoded, err := base64.StdEncoding.DecodeString(s); err == nil {
+			n.Val = any(decoded).(T)
+			n.Valid = true
+			return nil
+		}
+		n.Val = any([]byte(s)).(T)
+		n.Valid = true
+		return nil
+	}
+
+	return n.FromString(s)
+}
+
 // String implements fmt.Stringer.
 func (n SqlNull[T]) String() string {
 	if !n.Valid {
@@ -329,6 +436,7 @@ type (
 	SqlInt16     = SqlNull[int16]
 	SqlInt32     = SqlNull[int32]
 	SqlInt64     = SqlNull[int64]
+	SqlFloat32   = SqlNull[float32]
 	SqlFloat64   = SqlNull[float64]
 	SqlBool      = SqlNull[bool]
 	SqlString    = SqlNull[string]
@@ -343,7 +451,7 @@ func (t SqlTimeStamp) MarshalJSON() ([]byte, error) {
 	if !t.Valid || t.Val.IsZero() || t.Val.Before(time.Date(0002, 1, 1, 0, 0, 0, 0, time.UTC)) {
 		return []byte("null"), nil
 	}
-	return []byte(fmt.Sprintf(`"%s"`, t.Val.Format("2006-01-02T15:04:05"))), nil
+	return fmt.Appendf(nil, `"%s"`, t.Val.Format("2006-01-02T15:04:05")), nil
 }
 
 func (t *SqlTimeStamp) UnmarshalJSON(b []byte) error {
@@ -363,6 +471,49 @@ func (t SqlTimeStamp) Value() (driver.Value, error) {
 	return t.Val.Format("2006-01-02T15:04:05"), nil
 }
 
+func (t SqlTimeStamp) MarshalYAML() (any, error) {
+	if !t.Valid || t.Val.IsZero() || t.Val.Before(time.Date(0002, 1, 1, 0, 0, 0, 0, time.UTC)) {
+		return nil, nil
+	}
+	return t.Val.Format("2006-01-02T15:04:05"), nil
+}
+
+func (t *SqlTimeStamp) UnmarshalYAML(value *yaml.Node) error {
+	if err := t.SqlNull.UnmarshalYAML(value); err != nil {
+		return err
+	}
+	if t.Valid && (t.Val.IsZero() || t.Val.Format("2006-01-02T15:04:05") == "0001-01-01T00:00:00") {
+		t.Valid = false
+	}
+	return nil
+}
+
+func (t SqlTimeStamp) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	if !t.Valid || t.Val.IsZero() || t.Val.Before(time.Date(0002, 1, 1, 0, 0, 0, 0, time.UTC)) {
+		return e.EncodeElement("", start)
+	}
+	return e.EncodeElement(t.Val.Format("2006-01-02T15:04:05"), start)
+}
+
+func (t *SqlTimeStamp) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	var s string
+	if err := d.DecodeElement(&s, &start); err != nil {
+		return err
+	}
+	if s == "" {
+		t.Valid = false
+		t.Val = time.Time{}
+		return nil
+	}
+	tm, err := tryParseDT(s)
+	if err != nil {
+		return err
+	}
+	t.Val = tm
+	t.Valid = !tm.IsZero() && tm.Format("2006-01-02T15:04:05") != "0001-01-01T00:00:00"
+	return nil
+}
+
 func SqlTimeStampNow() SqlTimeStamp {
 	return SqlTimeStamp{SqlNull: SqlNull[time.Time]{Val: time.Now(), Valid: true}}
 }
@@ -378,7 +529,7 @@ func (d SqlDate) MarshalJSON() ([]byte, error) {
 	if strings.HasPrefix(s, "0001-01-01") {
 		return []byte("null"), nil
 	}
-	return []byte(fmt.Sprintf(`"%s"`, s)), nil
+	return fmt.Appendf(nil, `"%s"`, s), nil
 }
 
 func (d *SqlDate) UnmarshalJSON(b []byte) error {
@@ -413,6 +564,57 @@ func (d SqlDate) String() string {
 	return s
 }
 
+func (d SqlDate) MarshalYAML() (any, error) {
+	if !d.Valid || d.Val.IsZero() {
+		return nil, nil
+	}
+	s := d.Val.Format("2006-01-02")
+	if strings.HasPrefix(s, "0001-01-01") {
+		return nil, nil
+	}
+	return s, nil
+}
+
+func (d *SqlDate) UnmarshalYAML(value *yaml.Node) error {
+	if err := d.SqlNull.UnmarshalYAML(value); err != nil {
+		return err
+	}
+	if d.Valid && d.Val.Format("2006-01-02") <= "0001-01-01" {
+		d.Valid = false
+	}
+	return nil
+}
+
+func (d SqlDate) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	if !d.Valid || d.Val.IsZero() {
+		return e.EncodeElement("", start)
+	}
+	s := d.Val.Format("2006-01-02")
+	if strings.HasPrefix(s, "0001-01-01") {
+		return e.EncodeElement("", start)
+	}
+	return e.EncodeElement(s, start)
+}
+
+func (d *SqlDate) UnmarshalXML(dec *xml.Decoder, start xml.StartElement) error {
+	var s string
+	if err := dec.DecodeElement(&s, &start); err != nil {
+		return err
+	}
+	if s == "" {
+		d.Valid = false
+		d.Val = time.Time{}
+		return nil
+	}
+	tm, err := tryParseDT(s)
+	if err != nil {
+		return err
+	}
+	d.Val = tm
+	d.Valid = !tm.IsZero() && tm.Format("2006-01-02") > "0001-01-01"
+	return nil
+}
+
 func SqlDateNow() SqlDate {
 	return SqlDate{SqlNull: SqlNull[time.Time]{Val: time.Now(), Valid: true}}
 }
@@ -428,7 +630,7 @@ func (t SqlTime) MarshalJSON() ([]byte, error) {
 	if s == "00:00:00" {
 		return []byte("null"), nil
 	}
-	return []byte(fmt.Sprintf(`"%s"`, s)), nil
+	return fmt.Appendf(nil, `"%s"`, s), nil
 }
 
 func (t *SqlTime) UnmarshalJSON(b []byte) error {
@@ -455,6 +657,57 @@ func (t SqlTime) String() string {
 	return t.Val.Format("15:04:05")
 }
 
+func (t SqlTime) MarshalYAML() (any, error) {
+	if !t.Valid || t.Val.IsZero() {
+		return nil, nil
+	}
+	s := t.Val.Format("15:04:05")
+	if s == "00:00:00" {
+		return nil, nil
+	}
+	return s, nil
+}
+
+func (t *SqlTime) UnmarshalYAML(value *yaml.Node) error {
+	if err := t.SqlNull.UnmarshalYAML(value); err != nil {
+		return err
+	}
+	if t.Valid && t.Val.Format("15:04:05") == "00:00:00" {
+		t.Valid = false
+	}
+	return nil
+}
+
+func (t SqlTime) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	if !t.Valid || t.Val.IsZero() {
+		return e.EncodeElement("", start)
+	}
+	s := t.Val.Format("15:04:05")
+	if s == "00:00:00" {
+		return e.EncodeElement("", start)
+	}
+	return e.EncodeElement(s, start)
+}
+
+func (t *SqlTime) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	var s string
+	if err := d.DecodeElement(&s, &start); err != nil {
+		return err
+	}
+	if s == "" {
+		t.Valid = false
+		t.Val = time.Time{}
+		return nil
+	}
+	tm, err := tryParseDT(s)
+	if err != nil {
+		return err
+	}
+	t.Val = tm
+	t.Valid = !tm.IsZero() && tm.Format("15:04:05") != "00:00:00"
+	return nil
+}
+
 func SqlTimeNow() SqlTime {
 	return SqlTime{SqlNull: SqlNull[time.Time]{Val: time.Now(), Valid: true}}
 }
@@ -462,6 +715,11 @@ func SqlTimeNow() SqlTime {
 // SqlJSONB - Nullable JSONB as []byte.
 type SqlJSONB []byte
 
+// SqlJSON - Nullable JSON as []byte. PostgreSQL's json and jsonb types share
+// the same textual representation and Go marshalling behavior, differing only
+// in server-side storage, so SqlJSON is an alias of SqlJSONB.
+type SqlJSON = SqlJSONB
+
 // Scan implements sql.Scanner.
 func (n *SqlJSONB) Scan(value any) error {
 	if value == nil {
@@ -518,6 +776,67 @@ func (n *SqlJSONB) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+// MarshalYAML implements yaml.Marshaler. The underlying JSON is decoded into
+// a generic value first so it renders as native YAML mappings/sequences
+// rather than an embedded JSON string.
+func (n SqlJSONB) MarshalYAML() (any, error) {
+	if len(n) == 0 {
+		return nil, nil
+	}
+	var v any
+	if err := json.Unmarshal(n, &v); err != nil {
+		return nil, nil
+	}
+	return v, nil
+}
+
+// UnmarshalYAML implements yaml.Unmarshaler.
+func (n *SqlJSONB) UnmarshalYAML(value *yaml.Node) error {
+	if value == nil || value.Tag == "!!null" {
+		*n = nil
+		return nil
+	}
+	var v any
+	if err := value.Decode(&v); err != nil {
+		return err
+	}
+	b, err := json.Marshal(v)
+	if err != nil {
+		return err
+	}
+	*n = b
+	return nil
+}
+
+// MarshalXML implements xml.Marshaler. JSON has no clean structural mapping
+// to XML, so the raw JSON text is emitted as the element's text content.
+func (n SqlJSONB) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	if len(n) == 0 {
+		return e.EncodeElement("", start)
+	}
+	var obj any
+	if err := json.Unmarshal(n, &obj); err != nil {
+		return e.EncodeElement("", start)
+	}
+	return e.EncodeElement(string(n), start)
+}
+
+// UnmarshalXML implements xml.Unmarshaler, reading back the raw JSON text
+// written by MarshalXML.
+func (n *SqlJSONB) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	var s string
+	if err := d.DecodeElement(&s, &start); err != nil {
+		return err
+	}
+	s = strings.TrimSpace(s)
+	if s == "" {
+		*n = nil
+		return nil
+	}
+	*n = []byte(s)
+	return nil
+}
+
 func (n SqlJSONB) AsMap() (map[string]any, error) {
 	if len(n) == 0 {
 		return nil, nil
@@ -625,6 +944,10 @@ func NewSqlInt64(v int64) SqlInt64 {
 	return SqlInt64{Val: v, Valid: true}
 }
 
+func NewSqlFloat32(v float32) SqlFloat32 {
+	return SqlFloat32{Val: v, Valid: true}
+}
+
 func NewSqlFloat64(v float64) SqlFloat64 {
 	return SqlFloat64{Val: v, Valid: true}
 }

vendor/modules.txt

@@ -1,3 +1,6 @@
+# git.warky.dev/wdevs/relspecgo v1.0.62
+## explicit; go 1.25.7
+git.warky.dev/wdevs/relspecgo/pkg/sqltypes
 # github.com/beorn7/perks v1.0.1
 ## explicit; go 1.11
 github.com/beorn7/perks/quantile
@@ -15,7 +18,6 @@ github.com/bitechdev/ResolveSpec/pkg/modelregistry
 github.com/bitechdev/ResolveSpec/pkg/reflection
 github.com/bitechdev/ResolveSpec/pkg/resolvespec
 github.com/bitechdev/ResolveSpec/pkg/security
-github.com/bitechdev/ResolveSpec/pkg/spectypes
 # github.com/bradfitz/gomemcache v0.0.0-20260422231931-4d751bb6e37c
 ## explicit; go 1.18
 github.com/bradfitz/gomemcache/memcache
@@ -184,8 +186,6 @@ github.com/redis/go-redis/v9/internal/routing
 github.com/redis/go-redis/v9/internal/util
 github.com/redis/go-redis/v9/maintnotifications
 github.com/redis/go-redis/v9/push
-# github.com/rogpeppe/go-internal v1.14.1
-## explicit; go 1.23
 # github.com/sagikazarmark/locafero v0.12.0
 ## explicit; go 1.23.0
 github.com/sagikazarmark/locafero