Comparison operators refactoring.

sqlbuilder/bool_expresion.go

@@ -3,35 +3,30 @@ package sqlbuilder
 type boolExpression interface {
 	expression
 
-	Eq(expression boolExpression) boolExpression
+	EQ(expression boolExpression) boolExpression
-	NotEq(expression boolExpression) boolExpression
+	NOT_EQ(expression boolExpression) boolExpression
-	GtEq(rhs expression) boolExpression
+
-	LtEq(rhs expression) boolExpression
+	IS_TRUE() boolExpression
+	IS_NOT_TRUE() boolExpression
+	IS_FALSE() boolExpression
+	IS_NOT_FALSE() boolExpression
+	IS_UNKNOWN() boolExpression
+	IS_NOT_UNKNOWN() boolExpression
 
 	AND(expression boolExpression) boolExpression
 	OR(expression boolExpression) boolExpression
-	IS_TRUE() boolExpression
-	IS_FALSE() boolExpression
 }
 
 type boolInterfaceImpl struct {
 	parent boolExpression
 }
 
-func (b *boolInterfaceImpl) Eq(expression boolExpression) boolExpression {
+func (b *boolInterfaceImpl) EQ(expression boolExpression) boolExpression {
-	return Eq(b.parent, expression)
+	return EQ(b.parent, expression)
 }
 
-func (b *boolInterfaceImpl) NotEq(expression boolExpression) boolExpression {
+func (b *boolInterfaceImpl) NOT_EQ(expression boolExpression) boolExpression {
-	return NotEq(b.parent, expression)
+	return NOT_EQ(b.parent, expression)
-}
-
-func (b *boolInterfaceImpl) GtEq(rhs expression) boolExpression {
-	return GtEq(b.parent, rhs)
-}
-
-func (b *boolInterfaceImpl) LtEq(rhs expression) boolExpression {
-	return LtEq(b.parent, rhs)
 }
 
 func (b *boolInterfaceImpl) AND(expression boolExpression) boolExpression {
@@ -41,27 +36,29 @@ func (b *boolInterfaceImpl) AND(expression boolExpression) boolExpression {
 func (b *boolInterfaceImpl) OR(expression boolExpression) boolExpression {
 	return Or(b.parent, expression)
 }
+
 func (b *boolInterfaceImpl) IS_TRUE() boolExpression {
-	return IsTrue(b.parent)
+	return IS_TRUE(b.parent)
+}
+
+func (b *boolInterfaceImpl) IS_NOT_TRUE() boolExpression {
+	return IS_NOT_TRUE(b.parent)
 }
 
 func (b *boolInterfaceImpl) IS_FALSE() boolExpression {
-	return nil
+	return IS_FALSE(b.parent)
 }
 
-//---------------------------------------------------//
+func (b *boolInterfaceImpl) IS_NOT_FALSE() boolExpression {
-type boolLiteralExpression struct {
+	return IS_NOT_FALSE(b.parent)
-	boolInterfaceImpl
-	literalExpression
 }
 
-func newBoolLiteralExpression(value bool) boolExpression {
+func (b *boolInterfaceImpl) IS_UNKNOWN() boolExpression {
-	boolLiteralExpression := boolLiteralExpression{}
+	return IS_UNKNOWN(b.parent)
+}
 
-	boolLiteralExpression.literalExpression = *Literal(value)
+func (b *boolInterfaceImpl) IS_NOT_UNKNOWN() boolExpression {
-	boolLiteralExpression.boolInterfaceImpl.parent = &boolLiteralExpression
+	return IS_NOT_UNKNOWN(b.parent)
-
-	return &boolLiteralExpression
 }
 
 //---------------------------------------------------//
@@ -69,13 +66,13 @@ type binaryBoolExpression struct {
 	expressionInterfaceImpl
 	boolInterfaceImpl
 
-	binaryExpression
+	binaryOpExpression
 }
 
 func newBinaryBoolExpression(lhs, rhs expression, operator string) boolExpression {
 	boolExpression := binaryBoolExpression{}
 
-	boolExpression.binaryExpression = newBinaryExpression(lhs, rhs, operator)
+	boolExpression.binaryOpExpression = newBinaryExpression(lhs, rhs, operator)
 	boolExpression.expressionInterfaceImpl.parent = &boolExpression
 	boolExpression.boolInterfaceImpl.parent = &boolExpression
 
@@ -87,113 +84,33 @@ type prefixBoolExpression struct {
 	expressionInterfaceImpl
 	boolInterfaceImpl
 
-	prefixExpression
+	prefixOpExpression
 }
 
 func newPrefixBoolExpression(expression expression, operator string) boolExpression {
-	boolExpression := prefixBoolExpression{}
+	exp := prefixBoolExpression{}
-	boolExpression.prefixExpression = newPrefixExpression(expression, operator)
+	exp.prefixOpExpression = newPrefixExpression(expression, operator)
 
-	boolExpression.expressionInterfaceImpl.parent = &boolExpression
+	exp.expressionInterfaceImpl.parent = &exp
-	boolExpression.boolInterfaceImpl.parent = &boolExpression
+	exp.boolInterfaceImpl.parent = &exp
 
-	return &boolExpression
+	return &exp
 }
 
-func EXISTS(subQuery selectStatement) boolExpression {
+//---------------------------------------------------//
-	return newPrefixBoolExpression(subQuery, "EXISTS")
+type postfixBoolOpExpression struct {
+	expressionInterfaceImpl
+	boolInterfaceImpl
+
+	postfixOpExpression
 }
 
-// Returns a representation of "a=b"
+func newPostifxBoolExpression(expression expression, operator string) boolExpression {
-func Eq(lhs, rhs expression) boolExpression {
+	exp := postfixBoolOpExpression{}
-	return newBinaryBoolExpression(lhs, rhs, "=")
+	exp.postfixOpExpression = newPostfixOpExpression(expression, operator)
-}
 
-// Returns a representation of "a=b", where b is a literal
+	exp.expressionInterfaceImpl.parent = &exp
-func EqL(lhs expression, val interface{}) boolExpression {
+	exp.boolInterfaceImpl.parent = &exp
-	return Eq(lhs, Literal(val))
-}
 
-// Returns a representation of "a!=b"
+	return &exp
-func NotEq(lhs, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, "!=")
-}
-
-// Returns a representation of "a!=b", where b is a literal
-func NeqL(lhs expression, val interface{}) boolExpression {
-	return NotEq(lhs, Literal(val))
-}
-
-// Returns a representation of "a<b"
-func Lt(lhs expression, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, "<")
-}
-
-// Returns a representation of "a<b", where b is a literal
-func LtL(lhs expression, val interface{}) boolExpression {
-	return Lt(lhs, Literal(val))
-}
-
-// Returns a representation of "a<=b"
-func LtEq(lhs, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, "<=")
-}
-
-// Returns a representation of "a<=b", where b is a literal
-func LteL(lhs expression, val interface{}) boolExpression {
-	return LtEq(lhs, Literal(val))
-}
-
-// Returns a representation of "a>b"
-func Gt(lhs, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, ">")
-}
-
-// Returns a representation of "a>b", where b is a literal
-func GtL(lhs expression, val interface{}) boolExpression {
-	return Gt(lhs, Literal(val))
-}
-
-// Returns a representation of "a>=b"
-func GtEq(lhs, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, ">=")
-}
-
-// Returns a representation of "a>=b", where b is a literal
-func GteL(lhs expression, val interface{}) boolExpression {
-	return GtEq(lhs, Literal(val))
-}
-
-// Returns a representation of "not expr"
-func Not(expr boolExpression) boolExpression {
-	return newPrefixBoolExpression(expr, "NOT")
-}
-
-func IsTrue(expr boolExpression) boolExpression {
-	return newPrefixBoolExpression(expr, "IS TRUE")
-}
-
-func And(lhs, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, "AND")
-}
-
-// Returns a representation of "c[0] OR ... OR c[n-1]" for c in clauses
-func Or(lhs, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, "OR")
-}
-
-func Like(lhs, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, "LIKE")
-}
-
-func LikeL(lhs expression, val string) boolExpression {
-	return Like(lhs, Literal(val))
-}
-
-func Regexp(lhs, rhs expression) boolExpression {
-	return newBinaryBoolExpression(lhs, rhs, "REGEXP")
-}
-
-func RegexpL(lhs expression, val string) boolExpression {
-	return Regexp(lhs, Literal(val))
 }

sqlbuilder/bool_expression_test.go

@@ -6,8 +6,42 @@ import (
 	"testing"
 )
 
+func TestBoolExpressionEQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColBool.EQ(table2ColBool)), "table1.colBool = table2.colBool")
+	assert.Equal(t, getTestSerialize(t, table1ColBool.AND(table2ColBool).EQ(table2ColBool)), "table1.colBool AND table2.colBool = table2.colBool")
+}
+
+func TestBoolExpressionNOT_EQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColBool.NOT_EQ(table2ColBool)), "table1.colBool != table2.colBool")
+	assert.Equal(t, getTestSerialize(t, table1ColBool.AND(table2ColBool).NOT_EQ(table2ColBool)), "table1.colBool AND table2.colBool != table2.colBool")
+}
+
+func TestBoolExpressionIS_TRUE(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColBool.IS_TRUE()), "table1.colBool IS TRUE")
+}
+
+func TestBoolExpressionIS_NOT_TRUE(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColBool.IS_NOT_TRUE()), "table1.colBool IS NOT TRUE")
+}
+
+func TestBoolExpressionIS_FALSE(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColBool.IS_FALSE()), "table1.colBool IS FALSE")
+}
+
+func TestBoolExpressionIS_NOT_FALSE(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColBool.IS_NOT_FALSE()), "table1.colBool IS NOT FALSE")
+}
+
+func TestBoolExpressionIS_UNKNOWN(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColBool.IS_UNKNOWN()), "table1.colBool IS UNKNOWN")
+}
+
+func TestBoolExpressionIS_NOT_UNKNOWN(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColBool.IS_NOT_UNKNOWN()), "table1.colBool IS NOT UNKNOWN")
+}
+
 func TestBinaryExpression(t *testing.T) {
-	boolExpression := Eq(Literal(2), Literal(3))
+	boolExpression := EQ(Literal(2), Literal(3))
 
 	out := queryData{}
 	err := boolExpression.serialize(select_statement, &out)
@@ -28,7 +62,7 @@ func TestBinaryExpression(t *testing.T) {
 	})
 
 	t.Run("and", func(t *testing.T) {
-		exp := boolExpression.AND(Eq(Literal(4), Literal(5)))
+		exp := boolExpression.AND(EQ(Literal(4), Literal(5)))
 
 		out := queryData{}
 		err := exp.serialize(select_statement, &out)
@@ -38,7 +72,7 @@ func TestBinaryExpression(t *testing.T) {
 	})
 
 	t.Run("or", func(t *testing.T) {
-		exp := boolExpression.OR(Eq(Literal(4), Literal(5)))
+		exp := boolExpression.OR(EQ(Literal(4), Literal(5)))
 
 		out := queryData{}
 		err := exp.serialize(select_statement, &out)
@@ -49,7 +83,7 @@ func TestBinaryExpression(t *testing.T) {
 }
 
 func TestUnaryExpression(t *testing.T) {
-	notExpression := Not(Eq(Literal(2), Literal(1)))
+	notExpression := NOT(EQ(Literal(2), Literal(1)))
 
 	out := queryData{}
 	err := notExpression.serialize(select_statement, &out)
@@ -68,7 +102,7 @@ func TestUnaryExpression(t *testing.T) {
 	})
 
 	t.Run("and", func(t *testing.T) {
-		exp := notExpression.AND(Eq(Literal(4), Literal(5)))
+		exp := notExpression.AND(EQ(Literal(4), Literal(5)))
 
 		out := queryData{}
 		err := exp.serialize(select_statement, &out)
@@ -79,27 +113,27 @@ func TestUnaryExpression(t *testing.T) {
 }
 
 func TestUnaryIsTrueExpression(t *testing.T) {
-	notExpression := IsTrue(Eq(Literal(2), Literal(1)))
+	exp := IS_TRUE(EQ(Literal(2), Literal(1)))
 
 	out := queryData{}
-	err := notExpression.serialize(select_statement, &out)
+	err := exp.serialize(select_statement, &out)
 
 	assert.NilError(t, err)
-	assert.Equal(t, out.buff.String(), "IS TRUE $1 = $2")
+	assert.Equal(t, out.buff.String(), "$1 = $2 IS TRUE")
 
 	t.Run("and", func(t *testing.T) {
-		exp := notExpression.AND(Eq(Literal(4), Literal(5)))
+		exp := exp.AND(EQ(Literal(4), Literal(5)))
 
 		out := queryData{}
 		err := exp.serialize(select_statement, &out)
 
 		assert.NilError(t, err)
-		assert.Equal(t, out.buff.String(), `(IS TRUE $1 = $2 AND $3 = $4)`)
+		assert.Equal(t, out.buff.String(), `($1 = $2 IS TRUE AND $3 = $4)`)
 	})
 }
 
 func TestBoolLiteral(t *testing.T) {
-	literal := newBoolLiteralExpression(true)
+	literal := Bool(true)
 
 	out := queryData{}
 	err := literal.serialize(select_statement, &out)
@@ -113,7 +147,7 @@ func TestExists(t *testing.T) {
 	query := EXISTS(
 		table2.
 			SELECT(Literal(1)).
-			WHERE(table1Col1.Eq(table2Col3)),
+			WHERE(table1Col1.EQ(table2Col3)),
 	)
 
 	out := queryData{}

sqlbuilder/delete_statement_test.go

@@ -12,7 +12,7 @@ func TestDeleteUnconditionally(t *testing.T) {
 }
 
 func TestDeleteWithWhere(t *testing.T) {
-	sql, _, err := table1.DELETE().WHERE(table1Col1.EqL(1)).Sql()
+	sql, _, err := table1.DELETE().WHERE(table1Col1.EQ(Int(1))).Sql()
 	assert.NilError(t, err)
 
 	fmt.Println(sql)

sqlbuilder/example_test.go

@@ -32,7 +32,7 @@ func Example() {
 	filename := t2.C("filename")
 
 	in := []int32{1, 2, 3}
-	join := t2.LEFT_JOIN(t1, Eq(ns_id1, ns_id2))
+	join := t2.LEFT_JOIN(t1, EQ(ns_id1, ns_id2))
 	q := join.Select(ns_id2, sjid, prefix, filename).Where(
 		And(EqL(ns_id2, 456), In(sjid, in)))
 	text, _ := q.String()

sqlbuilder/expression.go

@@ -11,12 +11,16 @@ type expression interface {
 	groupByClause
 	orderByClause
 
+	IS_NULL() boolExpression
+	IS_NOT_NULL() boolExpression
+	IS_DISTINCT_FROM(expression expression) boolExpression
+	IS_NOT_DISTINCT_FROM(expression expression) boolExpression
+
 	IN(subQuery selectStatement) boolExpression
 	NOT_IN(subQuery selectStatement) boolExpression
 
 	AS(alias string) projection
-	IS_DISTINCT_FROM(expression expression) boolExpression
+
-	IS_NULL() boolExpression
 	ASC() orderByClause
 	DESC() orderByClause
 }
@@ -25,6 +29,22 @@ type expressionInterfaceImpl struct {
 	parent expression
 }
 
+func (e *expressionInterfaceImpl) IS_NULL() boolExpression {
+	return newPostifxBoolExpression(e.parent, "IS NULL")
+}
+
+func (e *expressionInterfaceImpl) IS_NOT_NULL() boolExpression {
+	return newPostifxBoolExpression(e.parent, "IS NOT NULL")
+}
+
+func (e *expressionInterfaceImpl) IS_DISTINCT_FROM(expression expression) boolExpression {
+	return newBinaryBoolExpression(e.parent, expression, "IS DISTINCT FROM")
+}
+
+func (e *expressionInterfaceImpl) IS_NOT_DISTINCT_FROM(expression expression) boolExpression {
+	return newBinaryBoolExpression(e.parent, expression, "IS NOT DISTINCT FROM")
+}
+
 func (e *expressionInterfaceImpl) IN(subQuery selectStatement) boolExpression {
 	return newBinaryBoolExpression(e.parent, subQuery, "IN")
 }
@@ -37,14 +57,6 @@ func (e *expressionInterfaceImpl) AS(alias string) projection {
 	return NewAlias(e.parent, alias)
 }
 
-func (e *expressionInterfaceImpl) IS_DISTINCT_FROM(expression expression) boolExpression {
-	return newBinaryBoolExpression(e.parent, expression, "IS DISTINCT FROM")
-}
-
-func (e *expressionInterfaceImpl) IS_NULL() boolExpression {
-	return nil
-}
-
 func (e *expressionInterfaceImpl) ASC() orderByClause {
 	return &orderByClauseImpl{expression: e.parent, ascent: true}
 }
@@ -66,13 +78,13 @@ func (e *expressionInterfaceImpl) serializeAsOrderBy(statement statementType, ou
 }
 
 // Representation of binary operations (e.g. comparisons, arithmetic)
-type binaryExpression struct {
+type binaryOpExpression struct {
 	lhs, rhs expression
 	operator string
 }
 
-func newBinaryExpression(lhs, rhs expression, operator string, parent ...expression) binaryExpression {
+func newBinaryExpression(lhs, rhs expression, operator string, parent ...expression) binaryOpExpression {
-	binaryExpression := binaryExpression{
+	binaryExpression := binaryOpExpression{
 		lhs:      lhs,
 		rhs:      rhs,
 		operator: operator,
@@ -95,7 +107,7 @@ func isSimpleOperand(expression expression) bool {
 	return false
 }
 
-func (c *binaryExpression) serialize(statement statementType, out *queryData) error {
+func (c *binaryOpExpression) serialize(statement statementType, out *queryData) error {
 	if c == nil {
 		return errors.New("Binary expression is nil.")
 	}
@@ -129,14 +141,14 @@ func (c *binaryExpression) serialize(statement statementType, out *queryData) er
 	return nil
 }
 
-// A not expression which negates a expression value
+// A prefix operator expression
-type prefixExpression struct {
+type prefixOpExpression struct {
 	expression expression
 	operator   string
 }
 
-func newPrefixExpression(expression expression, operator string) prefixExpression {
+func newPrefixExpression(expression expression, operator string) prefixOpExpression {
-	prefixExpression := prefixExpression{
+	prefixExpression := prefixOpExpression{
 		expression: expression,
 		operator:   operator,
 	}
@@ -144,7 +156,7 @@ func newPrefixExpression(expression expression, operator string) prefixExpressio
 	return prefixExpression
 }
 
-func (p *prefixExpression) serialize(statement statementType, out *queryData) error {
+func (p *prefixOpExpression) serialize(statement statementType, out *queryData) error {
 	if p == nil {
 		return errors.New("Prefix expression is nil.")
 	}
@@ -160,3 +172,35 @@ func (p *prefixExpression) serialize(statement statementType, out *queryData) er
 
 	return nil
 }
+
+// A postifx operator expression
+type postfixOpExpression struct {
+	expression expression
+	operator   string
+}
+
+func newPostfixOpExpression(expression expression, operator string) postfixOpExpression {
+	postfixOpExpression := postfixOpExpression{
+		expression: expression,
+		operator:   operator,
+	}
+
+	return postfixOpExpression
+}
+
+func (p *postfixOpExpression) serialize(statement statementType, out *queryData) error {
+	if p == nil {
+		return errors.New("Postifx operator expression is nil.")
+	}
+
+	if p.expression == nil {
+		return errors.Newf("nil prefix expression.")
+	}
+	if err := p.expression.serialize(statement, out); err != nil {
+		return err
+	}
+
+	out.writeString(p.operator)
+
+	return nil
+}

sqlbuilder/expression_old_test.go

@@ -155,7 +155,7 @@ func (s *ExprSuite) TestDivExpr(c *gc.C) {
 }
 
 func (s *ExprSuite) TestBinaryExprNilLHS(c *gc.C) {
-	expr := Gt(nil, table1Col1)
+	expr := GT(nil, table1Col1)
 
 	buf := &bytes.Buffer{}
 
@@ -164,7 +164,7 @@ func (s *ExprSuite) TestBinaryExprNilLHS(c *gc.C) {
 }
 
 func (s *ExprSuite) TestNegateExpr(c *gc.C) {
-	expr := Not(EqL(table1Col1, 123))
+	expr := NOT(EqL(table1Col1, 123))
 
 	buf := &bytes.Buffer{}
 
@@ -176,7 +176,7 @@ func (s *ExprSuite) TestNegateExpr(c *gc.C) {
 }
 
 func (s *ExprSuite) TestBinaryExprNilRHS(c *gc.C) {
-	expr := Lt(table1Col1, nil)
+	expr := LT(table1Col1, nil)
 
 	buf := &bytes.Buffer{}
 

sqlbuilder/expression_table.go

@@ -76,7 +76,7 @@ func (e *expressionTableImpl) INNER_JOIN(table readableTable, onCondition boolEx
 }
 
 //func (s *expressionTableImpl) InnerJoinUsing(table readableTable, col1 column, col2 column) readableTable {
-//	return INNER_JOIN(s, table, col1.Eq(col2))
+//	return INNER_JOIN(s, table, col1.EQ(col2))
 //}
 
 // Creates a left join tableName expression using onCondition.

sqlbuilder/expression_test.go

@@ -0,0 +1,26 @@
+package sqlbuilder
+
+import (
+	"gotest.tools/assert"
+	"testing"
+)
+
+func TestExpressionIS_NULL(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table2Col3.IS_NULL()), "table2.col3 IS NULL")
+	assert.Equal(t, getTestSerialize(t, table2Col3.ADD(table2Col3).IS_NULL()), "table2.col3 + table2.col3 IS NULL")
+}
+
+func TestExpressionIS_NOT_NULL(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table2Col3.IS_NOT_NULL()), "table2.col3 IS NOT NULL")
+	assert.Equal(t, getTestSerialize(t, table2Col3.ADD(table2Col3).IS_NOT_NULL()), "table2.col3 + table2.col3 IS NOT NULL")
+}
+
+func TestExpressionIS_DISTINCT_FROM(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table2Col3.IS_DISTINCT_FROM(table2StrCol)), "table2.col3 IS DISTINCT FROM table2.col4")
+	assert.Equal(t, getTestSerialize(t, table2Col3.ADD(table2Col3).IS_DISTINCT_FROM(Int(23))), "(table2.col3 + table2.col3 IS DISTINCT FROM $1)")
+}
+
+func TestExpressionIS_NOT_DISTINCT_FROM(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table2Col3.IS_NOT_DISTINCT_FROM(table2StrCol)), "table2.col3 IS NOT DISTINCT FROM table2.col4")
+	assert.Equal(t, getTestSerialize(t, table2Col3.ADD(table2Col3).IS_NOT_DISTINCT_FROM(Int(23))), "(table2.col3 + table2.col3 IS NOT DISTINCT FROM $1)")
+}

sqlbuilder/func_expression_test.go

@@ -7,8 +7,8 @@ import (
 
 func TestCase1(t *testing.T) {
 	query := CASE().
-		WHEN(table3Col1.EqL(1)).THEN(table3Col1.Add(IntLiteral(1))).
+		WHEN(table3Col1.EQ(Int(1))).THEN(table3Col1.ADD(Int(1))).
-		WHEN(table3Col1.EqL(2)).THEN(table3Col1.Add(IntLiteral(2)))
+		WHEN(table3Col1.EQ(Int(2))).THEN(table3Col1.ADD(Int(2)))
 
 	queryData := &queryData{}
 
@@ -20,9 +20,9 @@ func TestCase1(t *testing.T) {
 
 func TestCase2(t *testing.T) {
 	query := CASE(table3Col1).
-		WHEN(IntLiteral(1)).THEN(table3Col1.Add(IntLiteral(1))).
+		WHEN(Int(1)).THEN(table3Col1.ADD(Int(1))).
-		WHEN(IntLiteral(2)).THEN(table3Col1.Add(IntLiteral(2))).
+		WHEN(Int(2)).THEN(table3Col1.ADD(Int(2))).
-		ELSE(IntLiteral(0))
+		ELSE(Int(0))
 
 	queryData := &queryData{}
 

sqlbuilder/insert_statement.go

@@ -69,7 +69,7 @@ func (i *insertStatementImpl) VALUES(values ...interface{}) insertStatement {
 
 func (i *insertStatementImpl) VALUES_MAPPING(data interface{}) insertStatement {
 	if data == nil {
-		i.addError("Add method data is nil.")
+		i.addError("ADD method data is nil.")
 		return i
 	}
 
@@ -80,7 +80,7 @@ func (i *insertStatementImpl) VALUES_MAPPING(data interface{}) insertStatement {
 	}
 
 	if value.Kind() != reflect.Struct {
-		i.addError("Add method data is not struct or pointer to struct.")
+		i.addError("ADD method data is not struct or pointer to struct.")
 		return i
 	}
 
@@ -93,7 +93,7 @@ func (i *insertStatementImpl) VALUES_MAPPING(data interface{}) insertStatement {
 		structField := value.FieldByName(structFieldName)
 
 		if !structField.IsValid() {
-			i.addError("Add() : Data structure doesn't contain field : " + structFieldName + " for column " + columnName)
+			i.addError("ADD() : Data structure doesn't contain field : " + structFieldName + " for column " + columnName)
 			return i
 		}
 

sqlbuilder/insert_statement_test.go

@@ -56,11 +56,11 @@ INSERT INTO db.table1 (col1) VALUES
 func TestInsertDate(t *testing.T) {
 	date := time.Date(1999, 1, 2, 3, 4, 5, 0, time.UTC)
 
-	sql, _, err := table1.INSERT(table1Col4).VALUES(date).Sql()
+	sql, _, err := table1.INSERT(table1ColTime).VALUES(date).Sql()
 	assert.NilError(t, err)
 
 	assert.Equal(t, sql, `
-INSERT INTO db.table1 (col4) VALUES
+INSERT INTO db.table1 (colTime) VALUES
      ($1);
 `)
 }

sqlbuilder/integer_expression.go

@@ -3,9 +3,6 @@ package sqlbuilder
 type integerExpression interface {
 	numericExpression
 
-	//AddInt(value int) integerExpression
-	//AddInt64(value int) integerExpression
-
 	BitAnd(expression integerExpression) integerExpression
 	BitOr(expression integerExpression) integerExpression
 	BitXor(expression integerExpression) integerExpression
@@ -16,14 +13,6 @@ type integerInterfaceImpl struct {
 	parent integerExpression
 }
 
-//func (i *integerInterfaceImpl) AddInt(expression integerExpression) integerExpression {
-//	return NewBinaryIntegerExpression(i.parent, expression, " & ")
-//}
-//
-//func (i *integerInterfaceImpl) AddInt64(expression integerExpression) integerExpression {
-//	return NewBinaryIntegerExpression(i.parent, expression, " & ")
-//}
-
 func (i *integerInterfaceImpl) BitAnd(expression integerExpression) integerExpression {
 	return NewBinaryIntegerExpression(i.parent, expression, " & ")
 }
@@ -46,7 +35,7 @@ type binaryIntegerExpression struct {
 	numericInterfaceImpl
 	integerInterfaceImpl
 
-	binaryExpression
+	binaryOpExpression
 }
 
 func NewBinaryIntegerExpression(lhs, rhs integerExpression, operator string) integerExpression {
@@ -56,7 +45,7 @@ func NewBinaryIntegerExpression(lhs, rhs integerExpression, operator string) int
 	integerExpression.numericInterfaceImpl.parent = &integerExpression
 	integerExpression.integerInterfaceImpl.parent = &integerExpression
 
-	integerExpression.binaryExpression = newBinaryExpression(lhs, rhs, operator)
+	integerExpression.binaryOpExpression = newBinaryExpression(lhs, rhs, operator)
 
 	return &integerExpression
 }
@@ -67,12 +56,12 @@ type prefixIntegerExpression struct {
 	numericInterfaceImpl
 	integerInterfaceImpl
 
-	prefixExpression
+	prefixOpExpression
 }
 
 func NewPrefixIntegerExpression(expression integerExpression, operator string) integerExpression {
 	integerExpression := prefixIntegerExpression{}
-	integerExpression.prefixExpression = newPrefixExpression(expression, operator)
+	integerExpression.prefixOpExpression = newPrefixExpression(expression, operator)
 
 	integerExpression.expressionInterfaceImpl.parent = &integerExpression
 	integerExpression.numericInterfaceImpl.parent = &integerExpression

sqlbuilder/literal_expression.go

@@ -1,5 +1,7 @@
 package sqlbuilder
 
+import "time"
+
 // Representation of an escaped literal
 type literalExpression struct {
 	expressionInterfaceImpl
@@ -24,7 +26,7 @@ type numLiteralExpression struct {
 	numericInterfaceImpl
 }
 
-func IntLiteral(value int) numericExpression {
+func Int(value int) numericExpression {
 	numLiteral := &numLiteralExpression{}
 
 	numLiteral.literalExpression = *Literal(value)
@@ -34,3 +36,63 @@ func IntLiteral(value int) numericExpression {
 
 	return numLiteral
 }
+
+//---------------------------------------------------//
+type boolLiteralExpression struct {
+	boolInterfaceImpl
+	literalExpression
+}
+
+func Bool(value bool) boolExpression {
+	boolLiteralExpression := boolLiteralExpression{}
+
+	boolLiteralExpression.literalExpression = *Literal(value)
+	boolLiteralExpression.boolInterfaceImpl.parent = &boolLiteralExpression
+
+	return &boolLiteralExpression
+}
+
+//---------------------------------------------------//
+type numericLiteral struct {
+	numericInterfaceImpl
+	literalExpression
+}
+
+func Float(value float64) numericExpression {
+	numericLiteral := numericLiteral{}
+	numericLiteral.literalExpression = *Literal(value)
+
+	numericLiteral.numericInterfaceImpl.parent = &numericLiteral
+
+	return &numericLiteral
+}
+
+//---------------------------------------------------//
+type stringLiteral struct {
+	stringInterfaceImpl
+	literalExpression
+}
+
+func String(value string) stringExpression {
+	stringLiteral := stringLiteral{}
+	stringLiteral.literalExpression = *Literal(value)
+
+	stringLiteral.stringInterfaceImpl.parent = &stringLiteral
+
+	return &stringLiteral
+}
+
+//---------------------------------------------------//
+type timeLiteral struct {
+	timeInterfaceImpl
+	literalExpression
+}
+
+func Time(value time.Time) timeExpression {
+	timeLiteral := timeLiteral{}
+	timeLiteral.literalExpression = *Literal(value)
+
+	timeLiteral.timeInterfaceImpl.parent = &timeLiteral
+
+	return &timeLiteral
+}

sqlbuilder/numeric_expression.go

@@ -5,112 +5,75 @@ import "errors"
 type numericExpression interface {
 	expression
 
-	Eq(expression numericExpression) boolExpression
+	EQ(expression numericExpression) boolExpression
-	EqL(literal interface{}) boolExpression
+	NOT_EQ(expression numericExpression) boolExpression
-	NotEq(expression numericExpression) boolExpression
+	LT(rhs numericExpression) boolExpression
-	NotEqL(literal interface{}) boolExpression
+	LT_EQ(rhs numericExpression) boolExpression
+	GT(rhs numericExpression) boolExpression
+	GT_EQ(rhs numericExpression) boolExpression
 
-	Gt(rhs numericExpression) boolExpression
+	ADD(expression numericExpression) numericExpression
-	GtEq(rhs numericExpression) boolExpression
+	SUB(expression numericExpression) numericExpression
-	GtEqL(literal interface{}) boolExpression
+	MUL(expression numericExpression) numericExpression
-
+	DIV(expression numericExpression) numericExpression
-	Lt(rhs numericExpression) boolExpression
-	LtEq(rhs numericExpression) boolExpression
-	LtEqL(literal interface{}) boolExpression
-
-	Add(expression numericExpression) numericExpression
-	Sub(expression numericExpression) numericExpression
-	Mul(expression numericExpression) numericExpression
-	Div(expression numericExpression) numericExpression
 }
 
 type numericInterfaceImpl struct {
 	parent numericExpression
 }
 
-func (n *numericInterfaceImpl) Eq(expression numericExpression) boolExpression {
+func (n *numericInterfaceImpl) EQ(expression numericExpression) boolExpression {
-	return Eq(n.parent, expression)
+	return EQ(n.parent, expression)
 }
 
-func (n *numericInterfaceImpl) EqL(literal interface{}) boolExpression {
+func (n *numericInterfaceImpl) NOT_EQ(expression numericExpression) boolExpression {
-	return Eq(n.parent, Literal(literal))
+	return NOT_EQ(n.parent, expression)
 }
 
-func (n *numericInterfaceImpl) NotEq(expression numericExpression) boolExpression {
+func (n *numericInterfaceImpl) GT(expression numericExpression) boolExpression {
-	return NotEq(n.parent, expression)
+	return GT(n.parent, expression)
 }
 
-func (n *numericInterfaceImpl) NotEqL(literal interface{}) boolExpression {
+func (n *numericInterfaceImpl) GT_EQ(expression numericExpression) boolExpression {
-	return NotEq(n.parent, Literal(literal))
+	return GT_EQ(n.parent, expression)
 }
 
-func (n *numericInterfaceImpl) Gt(expression numericExpression) boolExpression {
+func (n *numericInterfaceImpl) LT(expression numericExpression) boolExpression {
-	return Gt(n.parent, expression)
+	return LT(n.parent, expression)
 }
 
-func (n *numericInterfaceImpl) GtEq(expression numericExpression) boolExpression {
+func (n *numericInterfaceImpl) LT_EQ(expression numericExpression) boolExpression {
-	return GtEq(n.parent, expression)
+	return LT_EQ(n.parent, expression)
 }
 
-func (n *numericInterfaceImpl) GtEqL(literal interface{}) boolExpression {
+func (n *numericInterfaceImpl) ADD(expression numericExpression) numericExpression {
-	return GtEq(n.parent, Literal(literal))
-}
-
-func (n *numericInterfaceImpl) Lt(expression numericExpression) boolExpression {
-	return Lt(n.parent, expression)
-}
-
-func (n *numericInterfaceImpl) LtEq(expression numericExpression) boolExpression {
-	return LtEq(n.parent, expression)
-}
-
-func (n *numericInterfaceImpl) LtEqL(literal interface{}) boolExpression {
-	return LtEq(n.parent, Literal(literal))
-}
-
-func (n *numericInterfaceImpl) Add(expression numericExpression) numericExpression {
 	return newBinaryNumericExpression(n.parent, expression, "+")
 }
 
-func (n *numericInterfaceImpl) Sub(expression numericExpression) numericExpression {
+func (n *numericInterfaceImpl) SUB(expression numericExpression) numericExpression {
 	return newBinaryNumericExpression(n.parent, expression, "-")
 }
 
-func (n *numericInterfaceImpl) Mul(expression numericExpression) numericExpression {
+func (n *numericInterfaceImpl) MUL(expression numericExpression) numericExpression {
 	return newBinaryNumericExpression(n.parent, expression, "*")
 }
 
-func (n *numericInterfaceImpl) Div(expression numericExpression) numericExpression {
+func (n *numericInterfaceImpl) DIV(expression numericExpression) numericExpression {
 	return newBinaryNumericExpression(n.parent, expression, "/")
 }
 
-//---------------------------------------------------//
-type numericLiteral struct {
-	numericInterfaceImpl
-	literalExpression
-}
-
-func NewNumericLiteral(value interface{}) numericExpression {
-	numericLiteral := numericLiteral{}
-	numericLiteral.literalExpression = *Literal(value)
-
-	numericLiteral.numericInterfaceImpl.parent = &numericLiteral
-
-	return &numericLiteral
-}
-
 //---------------------------------------------------//
 type binaryNumericExpression struct {
 	expressionInterfaceImpl
 	numericInterfaceImpl
 
-	binaryExpression
+	binaryOpExpression
 }
 
 func newBinaryNumericExpression(lhs, rhs expression, operator string) numericExpression {
 	numericExpression := binaryNumericExpression{}
 
-	numericExpression.binaryExpression = newBinaryExpression(lhs, rhs, operator)
+	numericExpression.binaryOpExpression = newBinaryExpression(lhs, rhs, operator)
 
 	numericExpression.expressionInterfaceImpl.parent = &numericExpression
 	numericExpression.numericInterfaceImpl.parent = &numericExpression

sqlbuilder/numeric_expression_test.go

@@ -0,0 +1,38 @@
+package sqlbuilder
+
+import (
+	"gotest.tools/assert"
+	"testing"
+)
+
+func TestNumericEQColumn(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1Col1.EQ(table2Col3)), "table1.col1 = table2.col3")
+}
+
+func TestNumericEQInt(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1Col1.EQ(Int(11))), "table1.col1 = $1")
+}
+
+func TestNumericEQFloat(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1Col1.EQ(Float(22.333))), "table1.col1 = $1")
+}
+
+func TestNumericNOT_EQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1Col1.NOT_EQ(table2Col3)), "table1.col1 != table2.col3")
+}
+
+func TestNumericGT(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1Col1.GT(table2Col3)), "table1.col1 > table2.col3")
+}
+
+func TestNumericGT_EQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1Col1.GT_EQ(table2Col3)), "table1.col1 >= table2.col3")
+}
+
+func TestNumericLT(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1Col1.LT(table2Col3)), "table1.col1 < table2.col3")
+}
+
+func TestNumericLT_EQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1Col1.LT_EQ(table2Col3)), "table1.col1 <= table2.col3")
+}

sqlbuilder/operators.go

@@ -0,0 +1,93 @@
+package sqlbuilder
+
+//----------- Logical operators ---------------//
+
+// Returns a representation of "not expr"
+func NOT(expr boolExpression) boolExpression {
+	return newPrefixBoolExpression(expr, "NOT")
+}
+
+//----------- Comparison operators ---------------//
+
+// Returns a representation of "a=b"
+func EQ(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, "=")
+}
+
+// Returns a representation of "a!=b"
+func NOT_EQ(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, "!=")
+}
+
+// Returns a representation of "a<b"
+func LT(lhs expression, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, "<")
+}
+
+// Returns a representation of "a<=b"
+func LT_EQ(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, "<=")
+}
+
+// Returns a representation of "a>b"
+func GT(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, ">")
+}
+
+// Returns a representation of "a>=b"
+func GT_EQ(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, ">=")
+}
+
+func IS_TRUE(expr boolExpression) boolExpression {
+	return newPostifxBoolExpression(expr, "IS TRUE")
+}
+
+func IS_NOT_TRUE(expr boolExpression) boolExpression {
+	return newPostifxBoolExpression(expr, "IS NOT TRUE")
+}
+
+func IS_FALSE(expr boolExpression) boolExpression {
+	return newPostifxBoolExpression(expr, "IS FALSE")
+}
+
+func IS_NOT_FALSE(expr boolExpression) boolExpression {
+	return newPostifxBoolExpression(expr, "IS NOT FALSE")
+}
+
+func IS_UNKNOWN(expr boolExpression) boolExpression {
+	return newPostifxBoolExpression(expr, "IS UNKNOWN")
+}
+
+func IS_NOT_UNKNOWN(expr boolExpression) boolExpression {
+	return newPostifxBoolExpression(expr, "IS NOT UNKNOWN")
+}
+
+func And(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, "AND")
+}
+
+// Returns a representation of "c[0] OR ... OR c[n-1]" for c in clauses
+func Or(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, "OR")
+}
+
+func Like(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, "LIKE")
+}
+
+func LikeL(lhs expression, val string) boolExpression {
+	return Like(lhs, Literal(val))
+}
+
+func Regexp(lhs, rhs expression) boolExpression {
+	return newBinaryBoolExpression(lhs, rhs, "REGEXP")
+}
+
+func RegexpL(lhs expression, val string) boolExpression {
+	return Regexp(lhs, Literal(val))
+}
+
+func EXISTS(subQuery selectStatement) boolExpression {
+	return newPrefixBoolExpression(subQuery, "EXISTS")
+}

sqlbuilder/statement_test.go

@@ -61,7 +61,7 @@ func (s *StmtSuite) TestSelectWhere(c *gc.C) {
 func (s *StmtSuite) TestSelectWhereDate(c *gc.C) {
 	date := time.Date(1999, 1, 2, 3, 4, 5, 0, time.UTC)
 
-	q := table1.Select(table1Col1).Where(GtL(table1Col4, date))
+	q := table1.Select(table1Col1).Where(GtL(table1ColTime, date))
 	sql, err := q.String()
 
 	c.Assert(err, gc.IsNil)
@@ -196,7 +196,7 @@ func (s *StmtSuite) TestSelectMultiOrderBy(c *gc.C) {
 
 func (s *StmtSuite) TestSelectOnJoin(c *gc.C) {
 
-	join := table1.InnerJoinOn(table2, Eq(table1Col3, table2Col3))
+	join := table1.InnerJoinOn(table2, EQ(table1Col3, table2Col3))
 	sql, err := join.Select(table1Col1, table2Col4).String()
 
 	c.Assert(err, gc.IsNil)
@@ -279,7 +279,7 @@ func (s *StmtSuite) TestInsertSingleValue(c *gc.C) {
 func (s *StmtSuite) TestInsertDate(c *gc.C) {
 	date := time.Date(1999, 1, 2, 3, 4, 5, 0, time.UTC)
 
-	sql, err := table1.INSERT(table1Col4).Add(Literal(date)).String()
+	sql, err := table1.INSERT(table1ColTime).Add(Literal(date)).String()
 	c.Assert(err, gc.IsNil)
 
 	c.Assert(
@@ -456,14 +456,14 @@ func (s *StmtSuite) TestUnionSelectWithMismatchedColumns(c *gc.C) {
 			table1Col1,
 			table1Col2,
 			table1Col3,
-			table1Col4).AndWhere(GtL(table1Col1, 123)).AndWhere(LtL(table1Col1, 321)),
+			table1ColTime).AndWhere(GtL(table1Col1, 123)).AndWhere(LtL(table1Col1, 321)),
 		table1.Select(table1Col1).Where(And(GtL(table1Col1, 123), LtL(table1Col1, 321))),
-		table1.Select(table1Col1).Where(LtL(table1Col1, 23)).OrderBy(table1Col4).Limit(20),
+		table1.Select(table1Col1).Where(LtL(table1Col1, 23)).OrderBy(table1ColTime).Limit(20),
 	)
 
 	q := UNION(select_queries...)
 	q = q.Where(And(LtL(table1Col1, 1000), GtL(table1Col1, 15)))
-	q = q.ORDER_BY(DESC(table1Col4), ASC(table1Col3))
+	q = q.ORDER_BY(DESC(table1ColTime), ASC(table1Col3))
 	q = q.LIMIT(5)
 
 	_, err := q.String()
@@ -496,15 +496,15 @@ func (s *StmtSuite) TestComplicatedUnionSelectWithWhereStatement(c *gc.C) {
 		).Where(And(GtL(table1Col1, 456), LtL(table1Col1, 654))),
 		table1.Select(
 			table1Col1,
-		).Where(LtL(table1Col1, 23)).OrderBy(table1Col4).Limit(20),
+		).Where(LtL(table1Col1, 23)).OrderBy(table1ColTime).Limit(20),
 	)
 
 	q := UNION(select_queries...)
 	q = q.Where(And(LtL(table1Col1, 1000), GtL(table1Col1, 15)))
 
-	q = q.ORDER_BY(DESC(table1Col4), ASC(table1Col3))
+	q = q.ORDER_BY(DESC(table1ColTime), ASC(table1Col3))
 	q = q.LIMIT(5)
-	q = q.GroupBy(table1Col4)
+	q = q.GroupBy(table1ColTime)
 
 	sql, err := q.String()
 

sqlbuilder/string_expression.go

@@ -3,28 +3,38 @@ package sqlbuilder
 type stringExpression interface {
 	expression
 
-	Eq(expression stringExpression) boolExpression
+	EQ(rhs stringExpression) boolExpression
-	EqString(value string) boolExpression
+	NOT_EQ(rhs stringExpression) boolExpression
-	NotEq(expression stringExpression) boolExpression
+	LT(rhs stringExpression) boolExpression
-	NotEqString(value string) boolExpression
+	LT_EQ(rhs stringExpression) boolExpression
+	GT(rhs stringExpression) boolExpression
+	GT_EQ(rhs stringExpression) boolExpression
 }
 
 type stringInterfaceImpl struct {
 	parent stringExpression
 }
 
-func (b *stringInterfaceImpl) Eq(expression stringExpression) boolExpression {
+func (s *stringInterfaceImpl) EQ(rhs stringExpression) boolExpression {
-	return Eq(b.parent, expression)
+	return EQ(s.parent, rhs)
 }
 
-func (b *stringInterfaceImpl) EqString(value string) boolExpression {
+func (s *stringInterfaceImpl) NOT_EQ(rhs stringExpression) boolExpression {
-	return EqL(b.parent, value)
+	return NOT_EQ(s.parent, rhs)
 }
 
-func (b *stringInterfaceImpl) NotEq(expression stringExpression) boolExpression {
+func (s *stringInterfaceImpl) GT(rhs stringExpression) boolExpression {
-	return NotEq(b.parent, expression)
+	return GT(s.parent, rhs)
 }
 
-func (b *stringInterfaceImpl) NotEqString(value string) boolExpression {
+func (s *stringInterfaceImpl) GT_EQ(rhs stringExpression) boolExpression {
-	return NotEq(b.parent, Literal(value))
+	return GT_EQ(s.parent, rhs)
+}
+
+func (s *stringInterfaceImpl) LT(rhs stringExpression) boolExpression {
+	return LT(s.parent, rhs)
+}
+
+func (s *stringInterfaceImpl) LT_EQ(rhs stringExpression) boolExpression {
+	return LT_EQ(s.parent, rhs)
 }

sqlbuilder/string_expression_test.go

@@ -0,0 +1,76 @@
+package sqlbuilder
+
+import (
+	"gotest.tools/assert"
+	"testing"
+)
+
+func TestStringEQColumn(t *testing.T) {
+	exp := table3StrCol.EQ(table2StrCol)
+
+	out := queryData{}
+	err := exp.serialize(select_statement, &out)
+
+	assert.NilError(t, err)
+	assert.Equal(t, out.buff.String(), "table3.col2 = table2.col4")
+}
+
+func TestStringEQString(t *testing.T) {
+	exp := table3StrCol.EQ(String("JOHN"))
+
+	out := queryData{}
+	err := exp.serialize(select_statement, &out)
+
+	assert.NilError(t, err)
+	assert.Equal(t, out.buff.String(), "table3.col2 = $1")
+}
+
+func TestStringNOT_EQ(t *testing.T) {
+	exp := table3StrCol.NOT_EQ(table2StrCol)
+
+	out := queryData{}
+	err := exp.serialize(select_statement, &out)
+
+	assert.NilError(t, err)
+	assert.Equal(t, out.buff.String(), "table3.col2 != table2.col4")
+}
+
+func TestStringGT(t *testing.T) {
+	exp := table3StrCol.GT(table2StrCol)
+
+	out := queryData{}
+	err := exp.serialize(select_statement, &out)
+
+	assert.NilError(t, err)
+	assert.Equal(t, out.buff.String(), "table3.col2 > table2.col4")
+}
+
+func TestStringGT_EQ(t *testing.T) {
+	exp := table3StrCol.GT_EQ(table2StrCol)
+
+	out := queryData{}
+	err := exp.serialize(select_statement, &out)
+
+	assert.NilError(t, err)
+	assert.Equal(t, out.buff.String(), "table3.col2 >= table2.col4")
+}
+
+func TestStringLT(t *testing.T) {
+	exp := table3StrCol.LT(table2StrCol)
+
+	out := queryData{}
+	err := exp.serialize(select_statement, &out)
+
+	assert.NilError(t, err)
+	assert.Equal(t, out.buff.String(), "table3.col2 < table2.col4")
+}
+
+func TestStringLT_EQ(t *testing.T) {
+	exp := table3StrCol.LT_EQ(table2StrCol)
+
+	out := queryData{}
+	err := exp.serialize(select_statement, &out)
+
+	assert.NilError(t, err)
+	assert.Equal(t, out.buff.String(), "table3.col2 <= table2.col4")
+}

sqlbuilder/table_test.go

@@ -22,7 +22,7 @@ func (s *TableSuite) TestBasicColumns(c *gc.C) {
 	c.Assert(cols[0], gc.Equals, table1Col1)
 	c.Assert(cols[1], gc.Equals, table1Col2)
 	c.Assert(cols[2], gc.Equals, table1Col3)
-	c.Assert(cols[3], gc.Equals, table1Col4)
+	c.Assert(cols[3], gc.Equals, table1ColTime)
 }
 
 func (s *TableSuite) TestCValidLookup(c *gc.C) {
@@ -74,7 +74,7 @@ func (s *TableSuite) TestJoinNilOnCondition(c *gc.C) {
 }
 
 func (s *TableSuite) TestInnerJoin(c *gc.C) {
-	join := table1.InnerJoinOn(table2, Eq(table1Col3, table2Col3))
+	join := table1.InnerJoinOn(table2, EQ(table1Col3, table2Col3))
 
 	buf := &bytes.Buffer{}
 
@@ -89,7 +89,7 @@ func (s *TableSuite) TestInnerJoin(c *gc.C) {
 }
 
 func (s *TableSuite) TestLeftJoin(c *gc.C) {
-	join := table1.LEFT_JOIN(table2, Eq(table1Col3, table2Col3))
+	join := table1.LEFT_JOIN(table2, EQ(table1Col3, table2Col3))
 
 	buf := &bytes.Buffer{}
 
@@ -105,7 +105,7 @@ func (s *TableSuite) TestLeftJoin(c *gc.C) {
 }
 
 func (s *TableSuite) TestRightJoin(c *gc.C) {
-	join := table1.RIGHT_JOIN(table2, Eq(table1Col3, table2Col3))
+	join := table1.RIGHT_JOIN(table2, EQ(table1Col3, table2Col3))
 
 	buf := &bytes.Buffer{}
 
@@ -121,21 +121,21 @@ func (s *TableSuite) TestRightJoin(c *gc.C) {
 }
 
 //func (s *TableSuite) TestJoinColumns(c *gc.C) {
-//	join := table1.RIGHT_JOIN(table2, Eq(table1Col3, table2Col3))
+//	join := table1.RIGHT_JOIN(table2, EQ(table1Col3, table2Col3))
 //
 //	cols := join.Columns()
 //	c.Assert(len(cols), gc.Equals, 6)
 //	c.Assert(cols[0], gc.Equals, table1Col1)
 //	c.Assert(cols[1], gc.Equals, table1Col2)
 //	c.Assert(cols[2], gc.Equals, table1Col3)
-//	c.Assert(cols[3], gc.Equals, table1Col4)
+//	c.Assert(cols[3], gc.Equals, table1ColTime)
 //	c.Assert(cols[4], gc.Equals, table2Col3)
 //	c.Assert(cols[5], gc.Equals, table2Col4)
 //}
 
 func (s *TableSuite) TestNestedInnerJoin(c *gc.C) {
-	join1 := table1.InnerJoinOn(table2, Eq(table1Col3, table2Col3))
+	join1 := table1.InnerJoinOn(table2, EQ(table1Col3, table2Col3))
-	join2 := join1.InnerJoinOn(table3, Eq(table1Col1, table3Col1))
+	join2 := join1.InnerJoinOn(table3, EQ(table1Col1, table3Col1))
 
 	buf := &bytes.Buffer{}
 
@@ -152,8 +152,8 @@ func (s *TableSuite) TestNestedInnerJoin(c *gc.C) {
 }
 
 func (s *TableSuite) TestNestedLeftJoin(c *gc.C) {
-	join1 := table1.InnerJoinOn(table2, Eq(table1Col3, table2Col3))
+	join1 := table1.InnerJoinOn(table2, EQ(table1Col3, table2Col3))
-	join2 := join1.LeftJoinOn(table3, Eq(table1Col1, table3Col1))
+	join2 := join1.LeftJoinOn(table3, EQ(table1Col1, table3Col1))
 
 	buf := &bytes.Buffer{}
 
@@ -170,8 +170,8 @@ func (s *TableSuite) TestNestedLeftJoin(c *gc.C) {
 }
 
 func (s *TableSuite) TestNestedRightJoin(c *gc.C) {
-	join1 := table1.InnerJoinOn(table2, Eq(table1Col3, table2Col3))
+	join1 := table1.InnerJoinOn(table2, EQ(table1Col3, table2Col3))
-	join2 := join1.RightJoinOn(table3, Eq(table1Col1, table3Col1))
+	join2 := join1.RightJoinOn(table3, EQ(table1Col1, table3Col1))
 
 	buf := &bytes.Buffer{}
 

sqlbuilder/test_utils.go

@@ -1,29 +1,53 @@
 package sqlbuilder
 
+import (
+	"gotest.tools/assert"
+	"testing"
+)
+
 var table1Col1 = NewIntegerColumn("col1", Nullable)
 var table1Col2 = NewIntegerColumn("col2", Nullable)
 var table1Col3 = NewIntegerColumn("col3", Nullable)
-var table1Col4 = NewTimeColumn("col4", Nullable)
+var table1ColTime = NewTimeColumn("colTime", Nullable)
+var table1ColBool = NewBoolColumn("colBool", Nullable)
+
 var table1 = NewTable(
 	"db",
 	"table1",
 	table1Col1,
 	table1Col2,
 	table1Col3,
-	table1Col4)
+	table1ColTime,
+	table1ColBool)
 
 var table2Col3 = NewIntegerColumn("col3", Nullable)
 var table2Col4 = NewIntegerColumn("col4", Nullable)
+var table2StrCol = NewStringColumn("col4", Nullable)
+var table2ColBool = NewBoolColumn("colBool", Nullable)
+var table2ColTime = NewTimeColumn("colTime", Nullable)
+
 var table2 = NewTable(
 	"db",
 	"table2",
 	table2Col3,
-	table2Col4)
+	table2Col4,
+	table2StrCol,
+	table2ColBool,
+	table2ColTime)
 
 var table3Col1 = NewIntegerColumn("col1", Nullable)
-var table3Col2 = NewIntegerColumn("col2", Nullable)
+var table3StrCol = NewStringColumn("col2", Nullable)
 var table3 = NewTable(
 	"db",
 	"table3",
 	table3Col1,
-	table3Col2)
+	table3StrCol)
+
+func getTestSerialize(t *testing.T, exp expression) string {
+	out := queryData{}
+	err := exp.serialize(select_statement, &out)
+
+	assert.NilError(t, err)
+
+	return out.buff.String()
+}

sqlbuilder/time_expression.go

@@ -3,50 +3,40 @@ package sqlbuilder
 type timeExpression interface {
 	expression
 
-	Eq(expression timeExpression) boolExpression
+	EQ(rhs timeExpression) boolExpression
-	EqL(literal string) boolExpression
+	NOT_EQ(rhs timeExpression) boolExpression
-	NotEq(expression timeExpression) boolExpression
+	LT(rhs timeExpression) boolExpression
-	NotEqL(literal string) boolExpression
+	LT_EQ(rhs timeExpression) boolExpression
-	GtEq(rhs timeExpression) boolExpression
+	GT(rhs timeExpression) boolExpression
-	GtEqL(literal string) boolExpression
+	GT_EQ(rhs timeExpression) boolExpression
-	LtEq(rhs timeExpression) boolExpression
-	LtEqL(literal string) boolExpression
 }
 
 type timeInterfaceImpl struct {
 	parent timeExpression
 }
 
-func (t *timeInterfaceImpl) Eq(expression timeExpression) boolExpression {
+func (t *timeInterfaceImpl) EQ(rhs timeExpression) boolExpression {
-	return Eq(t.parent, expression)
+	return EQ(t.parent, rhs)
 }
 
-func (t *timeInterfaceImpl) EqL(literal string) boolExpression {
+func (t *timeInterfaceImpl) NOT_EQ(rhs timeExpression) boolExpression {
-	return Eq(t.parent, Literal(literal))
+	return NOT_EQ(t.parent, rhs)
 }
 
-func (t *timeInterfaceImpl) NotEq(expression timeExpression) boolExpression {
+func (t *timeInterfaceImpl) LT(rhs timeExpression) boolExpression {
-	return NotEq(t.parent, expression)
+	return LT(t.parent, rhs)
 }
 
-func (t *timeInterfaceImpl) NotEqL(literal string) boolExpression {
+func (t *timeInterfaceImpl) LT_EQ(rhs timeExpression) boolExpression {
-	return NotEq(t.parent, Literal(literal))
+	return LT_EQ(t.parent, rhs)
 }
 
-func (t *timeInterfaceImpl) GtEq(expression timeExpression) boolExpression {
+func (t *timeInterfaceImpl) GT(rhs timeExpression) boolExpression {
-	return GtEq(t.parent, expression)
+	return GT(t.parent, rhs)
 }
 
-func (t *timeInterfaceImpl) GtEqL(literal string) boolExpression {
+func (t *timeInterfaceImpl) GT_EQ(rhs timeExpression) boolExpression {
-	return GtEq(t.parent, Literal(literal))
+	return GT_EQ(t.parent, rhs)
-}
-
-func (t *timeInterfaceImpl) LtEq(expression timeExpression) boolExpression {
-	return LtEq(t.parent, expression)
-}
-
-func (t *timeInterfaceImpl) LtEqL(literal string) boolExpression {
-	return LtEq(t.parent, Literal(literal))
 }
 
 //---------------------------------------------------//
@@ -54,12 +44,12 @@ type prefixTimeExpression struct {
 	expressionInterfaceImpl
 	timeInterfaceImpl
 
-	prefixExpression
+	prefixOpExpression
 }
 
 func newPrefixTimeExpression(expression expression, operator string) timeExpression {
 	timeExpr := prefixTimeExpression{}
-	timeExpr.prefixExpression = newPrefixExpression(expression, operator)
+	timeExpr.prefixOpExpression = newPrefixExpression(expression, operator)
 
 	timeExpr.expressionInterfaceImpl.parent = &timeExpr
 	timeExpr.timeInterfaceImpl.parent = &timeExpr

sqlbuilder/time_expression_test.go

@@ -0,0 +1,37 @@
+package sqlbuilder
+
+import (
+	"gotest.tools/assert"
+	"testing"
+	"time"
+)
+
+func TestTimeExpressionEQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColTime.EQ(table2ColTime)), "table1.colTime = table2.colTime")
+	assert.Equal(t, getTestSerialize(t, table1ColTime.EQ(Time(time.Now()))), "table1.colTime = $1")
+}
+
+func TestTimeExpressionNOT_EQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColTime.NOT_EQ(table2ColTime)), "table1.colTime != table2.colTime")
+	assert.Equal(t, getTestSerialize(t, table1ColTime.NOT_EQ(Time(time.Now()))), "table1.colTime != $1")
+}
+
+func TestTimeExpressionLT(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColTime.LT(table2ColTime)), "table1.colTime < table2.colTime")
+	assert.Equal(t, getTestSerialize(t, table1ColTime.LT(Time(time.Now()))), "table1.colTime < $1")
+}
+
+func TestTimeExpressionLT_EQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColTime.LT_EQ(table2ColTime)), "table1.colTime <= table2.colTime")
+	assert.Equal(t, getTestSerialize(t, table1ColTime.LT_EQ(Time(time.Now()))), "table1.colTime <= $1")
+}
+
+func TestTimeExpressionGT(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColTime.GT(table2ColTime)), "table1.colTime > table2.colTime")
+	assert.Equal(t, getTestSerialize(t, table1ColTime.GT(Time(time.Now()))), "table1.colTime > $1")
+}
+
+func TestTimeExpressionGT_EQ(t *testing.T) {
+	assert.Equal(t, getTestSerialize(t, table1ColTime.GT_EQ(table2ColTime)), "table1.colTime >= table2.colTime")
+	assert.Equal(t, getTestSerialize(t, table1ColTime.GT_EQ(Time(time.Now()))), "table1.colTime >= $1")
+}

sqlbuilder/update_statement_test.go

@@ -13,7 +13,7 @@ import (
 func TestUpdate(t *testing.T) {
 	stmt := table1.UPDATE(table1Col1, table1Col2).
 		SET(table1.SELECT(table1Col2, table2Col3)).
-		WHERE(table1Col1.EqL(2)).
+		WHERE(table1Col1.EQ(Int(2))).
 		RETURNING(table1Col1)
 
 	stmtStr, _, err := stmt.Sql()

tests/sample_test.go

@@ -3,6 +3,7 @@ package tests
 import (
 	"fmt"
 	"github.com/davecgh/go-spew/spew"
+	. "github.com/sub0zero/go-sqlbuilder/sqlbuilder"
 	"github.com/sub0zero/go-sqlbuilder/tests/.test_files/dvd_rental/test_sample/model"
 	"github.com/sub0zero/go-sqlbuilder/tests/.test_files/dvd_rental/test_sample/table"
 	"gotest.tools/assert"
@@ -12,7 +13,7 @@ import (
 func TestUUIDType(t *testing.T) {
 	query := table.AllTypes.
 		SELECT(table.AllTypes.AllColumns).
-		WHERE(table.AllTypes.UUID.EqString("a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a11"))
+		WHERE(table.AllTypes.UUID.EQ(String("a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a11")))
 
 	queryStr, args, err := query.Sql()
 

tests/scan_test.go

@@ -191,10 +191,10 @@ func TestScanToStruct(t *testing.T) {
 
 func TestScanToNestedStruct(t *testing.T) {
 	query := Inventory.
-		INNER_JOIN(Film, Inventory.FilmID.Eq(Film.FilmID)).
+		INNER_JOIN(Film, Inventory.FilmID.EQ(Film.FilmID)).
-		INNER_JOIN(Store, Inventory.StoreID.Eq(Store.StoreID)).
+		INNER_JOIN(Store, Inventory.StoreID.EQ(Store.StoreID)).
 		SELECT(Inventory.AllColumns, Film.AllColumns, Store.AllColumns).
-		WHERE(Inventory.InventoryID.EqL(1))
+		WHERE(Inventory.InventoryID.EQ(Int(1)))
 
 	t.Run("embedded structs", func(t *testing.T) {
 		dest := struct {
@@ -267,10 +267,10 @@ func TestScanToNestedStruct(t *testing.T) {
 
 	t.Run("embedded pointer to selected column", func(t *testing.T) {
 		query := Inventory.
-			INNER_JOIN(Film, Inventory.FilmID.Eq(Film.FilmID)).
+			INNER_JOIN(Film, Inventory.FilmID.EQ(Film.FilmID)).
-			INNER_JOIN(Store, Inventory.StoreID.Eq(Store.StoreID)).
+			INNER_JOIN(Store, Inventory.StoreID.EQ(Store.StoreID)).
 			SELECT(Inventory.AllColumns, Film.AllColumns, Store.AllColumns, Literal("").AS("actor.first_name")).
-			WHERE(Inventory.InventoryID.EqL(1))
+			WHERE(Inventory.InventoryID.EQ(Int(1)))
 
 		dest := struct {
 			model.Inventory
@@ -358,11 +358,11 @@ func TestScanToNestedStruct(t *testing.T) {
 
 	t.Run("embedded structs", func(t *testing.T) {
 		query := Inventory.
-			INNER_JOIN(Film, Inventory.FilmID.Eq(Film.FilmID)).
+			INNER_JOIN(Film, Inventory.FilmID.EQ(Film.FilmID)).
-			INNER_JOIN(Store, Inventory.StoreID.Eq(Store.StoreID)).
+			INNER_JOIN(Store, Inventory.StoreID.EQ(Store.StoreID)).
-			INNER_JOIN(Language, Film.LanguageID.Eq(Language.LanguageID)).
+			INNER_JOIN(Language, Film.LanguageID.EQ(Language.LanguageID)).
 			SELECT(Inventory.AllColumns, Film.AllColumns, Store.AllColumns, Language.AllColumns).
-			WHERE(Inventory.InventoryID.EqL(1))
+			WHERE(Inventory.InventoryID.EQ(Int(1)))
 
 		dest := struct {
 			model.Inventory
@@ -434,8 +434,8 @@ func TestScanToSlice(t *testing.T) {
 
 	t.Run("slice of complex structs", func(t *testing.T) {
 		query := Inventory.
-			INNER_JOIN(Film, Inventory.FilmID.Eq(Film.FilmID)).
+			INNER_JOIN(Film, Inventory.FilmID.EQ(Film.FilmID)).
-			INNER_JOIN(Store, Inventory.StoreID.Eq(Store.StoreID)).
+			INNER_JOIN(Store, Inventory.StoreID.EQ(Store.StoreID)).
 			SELECT(Inventory.AllColumns, Film.AllColumns, Store.AllColumns).
 			ORDER_BY(Inventory.InventoryID).
 			LIMIT(10)
@@ -589,9 +589,9 @@ func TestScanToSlice(t *testing.T) {
 
 	t.Run("slice of complex structs 2", func(t *testing.T) {
 		query := Country.
-			INNER_JOIN(City, City.CountryID.Eq(Country.CountryID)).
+			INNER_JOIN(City, City.CountryID.EQ(Country.CountryID)).
-			INNER_JOIN(Address, Address.CityID.Eq(City.CityID)).
+			INNER_JOIN(Address, Address.CityID.EQ(City.CityID)).
-			INNER_JOIN(Customer, Customer.AddressID.Eq(Address.AddressID)).
+			INNER_JOIN(Customer, Customer.AddressID.EQ(Address.AddressID)).
 			SELECT(Country.AllColumns, City.AllColumns, Address.AllColumns, Customer.AllColumns).
 			ORDER_BY(Country.CountryID.ASC(), City.CityID.ASC(), Address.AddressID.ASC(), Customer.CustomerID.ASC()).
 			LIMIT(1000)

tests/select_test.go

@@ -24,7 +24,7 @@ WHERE actor.actor_id = 1;
 
 	query := Actor.
 		SELECT(Actor.AllColumns).
-		WHERE(Actor.ActorID.EqL(1))
+		WHERE(Actor.ActorID.EQ(Int(1)))
 
 	assertQuery(t, query, expectedSql, 1)
 
@@ -68,7 +68,7 @@ LIMIT 30;
 `
 
 	query := SELECT(Payment.AllColumns, Customer.AllColumns).
-		FROM(Payment.INNER_JOIN(Customer, Payment.CustomerID.Eq(Customer.CustomerID))).
+		FROM(Payment.INNER_JOIN(Customer, Payment.CustomerID.EQ(Customer.CustomerID))).
 		ORDER_BY(Payment.PaymentID.ASC()).
 		LIMIT(30)
 
@@ -206,11 +206,11 @@ LIMIT 50;
 `
 	for i := 0; i < 1; i++ {
 		query := FilmActor.
-			INNER_JOIN(Actor, FilmActor.ActorID.Eq(Actor.ActorID)).
+			INNER_JOIN(Actor, FilmActor.ActorID.EQ(Actor.ActorID)).
-			INNER_JOIN(Film, FilmActor.FilmID.Eq(Film.FilmID)).
+			INNER_JOIN(Film, FilmActor.FilmID.EQ(Film.FilmID)).
-			INNER_JOIN(Language, Film.LanguageID.Eq(Language.LanguageID)).
+			INNER_JOIN(Language, Film.LanguageID.EQ(Language.LanguageID)).
-			INNER_JOIN(Inventory, Inventory.FilmID.Eq(Film.FilmID)).
+			INNER_JOIN(Inventory, Inventory.FilmID.EQ(Film.FilmID)).
-			INNER_JOIN(Rental, Rental.InventoryID.Eq(Inventory.InventoryID)).
+			INNER_JOIN(Rental, Rental.InventoryID.EQ(Inventory.InventoryID)).
 			SELECT(
 				FilmActor.AllColumns,
 				Film.AllColumns,
@@ -285,9 +285,9 @@ LIMIT 15;
 	limit := 15
 
 	query := Film.
-		INNER_JOIN(Language, Film.LanguageID.Eq(Language.LanguageID)).
+		INNER_JOIN(Language, Film.LanguageID.EQ(Language.LanguageID)).
 		SELECT(Language.AllColumns, Film.AllColumns).
-		WHERE(Film.Rating.EqString(model.MpaaRating_NC17.String())).
+		WHERE(Film.Rating.EQ(String(model.MpaaRating_NC17.String()))).
 		LIMIT(15)
 
 	assertQuery(t, query, expectedSql, model.MpaaRating_NC17.String(), int64(15))
@@ -318,7 +318,7 @@ func TestJoinQuerySliceWithPtrs(t *testing.T) {
 
 	limit := int64(3)
 
-	query := Film.INNER_JOIN(Language, Film.LanguageID.Eq(Language.LanguageID)).
+	query := Film.INNER_JOIN(Language, Film.LanguageID.EQ(Language.LanguageID)).
 		SELECT(Language.AllColumns, Film.AllColumns).
 		LIMIT(limit)
 
@@ -417,7 +417,7 @@ FROM dvds.customer
 ORDER BY customer.customer_id ASC;
 `
 	query := Customer.
-		FULL_JOIN(Address, Customer.AddressID.Eq(Address.AddressID)).
+		FULL_JOIN(Address, Customer.AddressID.EQ(Address.AddressID)).
 		SELECT(Customer.AllColumns, Address.AllColumns).
 		ORDER_BY(Customer.CustomerID.ASC())
 
@@ -506,7 +506,7 @@ ORDER BY employee.employee_id;
 
 	manager := Employee.AS("manager")
 	query := Employee.
-		LEFT_JOIN(manager, manager.EmployeeID.Eq(Employee.ManagerID)).
+		LEFT_JOIN(manager, manager.EmployeeID.EQ(Employee.ManagerID)).
 		SELECT(Employee.AllColumns, manager.AllColumns).
 		ORDER_BY(Employee.EmployeeID)
 
@@ -576,7 +576,7 @@ ORDER BY f1.film_id ASC;
 	f2 := Film.AS("f2")
 
 	query := f1.
-		INNER_JOIN(f2, f1.FilmID.Lt(f2.FilmID).AND(f1.Length.Eq(f2.Length))).
+		INNER_JOIN(f2, f1.FilmID.LT(f2.FilmID).AND(f1.Length.EQ(f2.Length))).
 		SELECT(f1.AllColumns, f2.AllColumns).
 		ORDER_BY(f1.FilmID.ASC())
 
@@ -612,8 +612,10 @@ LIMIT 1000;
 	f1 := Film.AS("f1")
 	f2 := Film.AS("f2")
 
+	f1.FilmID.EQ(Float(11))
+
 	query := f1.
-		INNER_JOIN(f2, f1.FilmID.NotEq(f2.FilmID).AND(f1.Length.Eq(f2.Length))).
+		INNER_JOIN(f2, f1.FilmID.NOT_EQ(f2.FilmID).AND(f1.Length.EQ(f2.Length))).
 		SELECT(f1.Title.AS("thesame_length_films.title1"),
 			f2.Title.AS("thesame_length_films.title2"),
 			f1.Length.AS("thesame_length_films.length")).
@@ -679,8 +681,8 @@ LIMIT 1000;
 //	manager := Staff.AS("manager")
 //
 //	query := Staff.
-//		INNER_JOIN(Address, Staff.AddressID.Eq(Address.AddressID)).
+//		INNER_JOIN(Address, Staff.AddressID.EQ(Address.AddressID)).
-//		INNER_JOIN(manager, Staff.StaffID.Eq(manager.StaffID)).
+//		INNER_JOIN(manager, Staff.StaffID.EQ(manager.StaffID)).
 //		SELECT(Staff.StaffID, Staff.FirstName, Staff.LastName, Address.AllColumns, manager.StaffID, manager.FirstName).
 //		DISTINCT()
 //
@@ -714,7 +716,7 @@ func TestSubQuery(t *testing.T) {
 	//avrgCustomer := NumExp(Customer.SELECT(Customer.LastName).LIMIT(1))
 	//
 	//Customer.
-	//	INNER_JOIN(selectStmtTable, Customer.LastName.Eq(selectStmtTable.RefStringColumn(Actor.FirstName))).
+	//	INNER_JOIN(selectStmtTable, Customer.LastName.EQ(selectStmtTable.RefStringColumn(Actor.FirstName))).
 	//	SELECT(Customer.AllColumns, selectStmtTable.RefIntColumnName("first_name")).
 	//	WHERE(Actor.LastName.Neq(avrgCustomer))
 
@@ -740,11 +742,11 @@ FROM dvds.actor
 `
 
 	rFilmsOnly := Film.SELECT(Film.FilmID, Film.Title, Film.Rating).
-		WHERE(Film.Rating.EqString("R")).
+		WHERE(Film.Rating.EQ(String("R"))).
 		AsTable("films")
 
-	query := Actor.INNER_JOIN(FilmActor, Actor.ActorID.Eq(FilmActor.FilmID)).
+	query := Actor.INNER_JOIN(FilmActor, Actor.ActorID.EQ(FilmActor.FilmID)).
-		INNER_JOIN(rFilmsOnly, FilmActor.FilmID.Eq(rFilmsOnly.RefIntColumn(Film.FilmID))).
+		INNER_JOIN(rFilmsOnly, FilmActor.FilmID.EQ(rFilmsOnly.RefIntColumn(Film.FilmID))).
 		SELECT(
 			Actor.AllColumns,
 			FilmActor.AllColumns,
@@ -809,7 +811,7 @@ ORDER BY film.film_id ASC;
 
 	query := Film.
 		SELECT(Film.AllColumns).
-		WHERE(Film.RentalRate.Eq(maxFilmRentalRate)).
+		WHERE(Film.RentalRate.EQ(maxFilmRentalRate)).
 		ORDER_BY(Film.FilmID.ASC())
 
 	fmt.Println(query.Sql())
@@ -856,8 +858,12 @@ ORDER BY SUM(payment.amount) ASC;
 			SUM(Payment.Amount).AS("customer_payment_sum.amount_sum"),
 		).
 		GROUP_BY(Payment.CustomerID).
-		ORDER_BY(SUM(Payment.Amount).ASC()).
+		ORDER_BY(
-		HAVING(SUM(Payment.Amount).Gt(NewNumericLiteral(100)))
+			SUM(Payment.Amount).ASC(),
+		).
+		HAVING(
+			SUM(Payment.Amount).GT(Int(100)),
+		)
 
 	assertQuery(t, customersPaymentQuery, expectedSql, 100)
 
@@ -913,7 +919,7 @@ ORDER BY customer_payment_sum.amount_sum ASC;
 	amountSumColumn := customersPaymentTable.RefIntColumnName("amount_sum")
 
 	query := Customer.
-		INNER_JOIN(customersPaymentTable, Customer.CustomerID.Eq(customersPaymentTable.RefIntColumn(Payment.CustomerID))).
+		INNER_JOIN(customersPaymentTable, Customer.CustomerID.EQ(customersPaymentTable.RefIntColumn(Payment.CustomerID))).
 		SELECT(Customer.AllColumns, amountSumColumn.AS("customer_with_amounts.amount_sum")).
 		ORDER_BY(amountSumColumn.ASC())
 
@@ -1018,10 +1024,10 @@ OFFSET 20;
 	query := UNION_ALL(
 		Payment.
 			SELECT(Payment.PaymentID.AS("payment.payment_id"), Payment.Amount).
-			WHERE(Payment.Amount.LtEqL(100)),
+			WHERE(Payment.Amount.LT_EQ(Int(100))),
 		Payment.
 			SELECT(Payment.PaymentID, Payment.Amount).
-			WHERE(Payment.Amount.GtEqL(200)),
+			WHERE(Payment.Amount.GT_EQ(Int(200))),
 	).
 		ORDER_BY(RefColumn("payment.payment_id").ASC(), Payment.Amount.DESC()).
 		LIMIT(10).
@@ -1061,9 +1067,9 @@ LIMIT 20;
 `
 	query := Payment.SELECT(
 		CASE(Payment.StaffID).
-			WHEN(IntLiteral(1)).THEN(Literal("ONE")).
+			WHEN(Int(1)).THEN(Literal("ONE")).
-			WHEN(IntLiteral(2)).THEN(Literal("TWO")).
+			WHEN(Int(2)).THEN(Literal("TWO")).
-			WHEN(IntLiteral(3)).THEN(Literal("THREE")).
+			WHEN(Int(3)).THEN(Literal("THREE")).
 			ELSE(Literal("OTHER")).AS("staff_id_num"),
 	).
 		ORDER_BY(Payment.PaymentID.ASC()).

tests/update_test.go

@@ -2,7 +2,7 @@ package tests
 
 import (
 	"fmt"
-	"github.com/sub0zero/go-sqlbuilder/sqlbuilder"
+	. "github.com/sub0zero/go-sqlbuilder/sqlbuilder"
 	"github.com/sub0zero/go-sqlbuilder/tests/.test_files/dvd_rental/test_sample/model"
 	"github.com/sub0zero/go-sqlbuilder/tests/.test_files/dvd_rental/test_sample/table"
 	"gotest.tools/assert"
@@ -11,9 +11,9 @@ import (
 
 func TestUpdateValues(t *testing.T) {
 	_, err := table.Link.INSERT(table.Link.URL, table.Link.Name, table.Link.Rel).
-		VALUES("http://www.postgresqltutorial.com", "PostgreSQL Tutorial", sqlbuilder.DEFAULT).
+		VALUES("http://www.postgresqltutorial.com", "PostgreSQL Tutorial", DEFAULT).
-		VALUES("http://www.yahoo.com", "Yahoo", sqlbuilder.DEFAULT).
+		VALUES("http://www.yahoo.com", "Yahoo", DEFAULT).
-		VALUES("http://www.bing.com", "Bing", sqlbuilder.DEFAULT).
+		VALUES("http://www.bing.com", "Bing", DEFAULT).
 		RETURNING(table.Link.ID).Execute(db)
 
 	assert.NilError(t, err)
@@ -21,7 +21,7 @@ func TestUpdateValues(t *testing.T) {
 	query := table.Link.
 		UPDATE(table.Link.Name, table.Link.URL).
 		SET("Bong", "http://bong.com").
-		WHERE(table.Link.Name.EqString("Bing"))
+		WHERE(table.Link.Name.EQ(String("Bing")))
 
 	queryStr, args, err := query.Sql()
 
@@ -38,7 +38,7 @@ func TestUpdateValues(t *testing.T) {
 	links := []model.Link{}
 
 	err = table.Link.SELECT(table.Link.AllColumns).
-		WHERE(table.Link.Name.EqString("Bong")).
+		WHERE(table.Link.Name.EQ(String("Bong"))).
 		Query(db, &links)
 
 	assert.NilError(t, err)
@@ -48,11 +48,11 @@ func TestUpdateValues(t *testing.T) {
 
 func TestUpdateAndReturning(t *testing.T) {
 	_, err := table.Link.INSERT(table.Link.URL, table.Link.Name, table.Link.Rel).
-		VALUES("http://www.postgresqltutorial.com", "PostgreSQL Tutorial", sqlbuilder.DEFAULT).
+		VALUES("http://www.postgresqltutorial.com", "PostgreSQL Tutorial", DEFAULT).
-		VALUES("http://www.ask.com", "Ask", sqlbuilder.DEFAULT).
+		VALUES("http://www.ask.com", "Ask", DEFAULT).
-		VALUES("http://www.ask.com", "Ask", sqlbuilder.DEFAULT).
+		VALUES("http://www.ask.com", "Ask", DEFAULT).
-		VALUES("http://www.yahoo.com", "Yahoo", sqlbuilder.DEFAULT).
+		VALUES("http://www.yahoo.com", "Yahoo", DEFAULT).
-		VALUES("http://www.bing.com", "Bing", sqlbuilder.DEFAULT).
+		VALUES("http://www.bing.com", "Bing", DEFAULT).
 		RETURNING(table.Link.ID).Execute(db)
 
 	assert.NilError(t, err)
@@ -60,7 +60,7 @@ func TestUpdateAndReturning(t *testing.T) {
 	stmt := table.Link.
 		UPDATE(table.Link.Name, table.Link.URL).
 		SET("DuckDuckGo", "http://www.duckduckgo.com").
-		WHERE(table.Link.Name.EqString("Ask")).
+		WHERE(table.Link.Name.EQ(String("Ask"))).
 		RETURNING(table.Link.AllColumns)
 
 	stmtStr, args, err := stmt.Sql()