Adding upstream version 1.11.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

builder_oci.go

@@ -0,0 +1,98 @@
+// Copyright 2016 Qiang Xue. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package dbx
+
+import (
+	"fmt"
+)
+
+// OciBuilder is the builder for Oracle databases.
+type OciBuilder struct {
+	*BaseBuilder
+	qb *OciQueryBuilder
+}
+
+var _ Builder = &OciBuilder{}
+
+// OciQueryBuilder is the query builder for Oracle databases.
+type OciQueryBuilder struct {
+	*BaseQueryBuilder
+}
+
+// NewOciBuilder creates a new OciBuilder instance.
+func NewOciBuilder(db *DB, executor Executor) Builder {
+	return &OciBuilder{
+		NewBaseBuilder(db, executor),
+		&OciQueryBuilder{NewBaseQueryBuilder(db)},
+	}
+}
+
+// Select returns a new SelectQuery object that can be used to build a SELECT statement.
+// The parameters to this method should be the list column names to be selected.
+// A column name may have an optional alias name. For example, Select("id", "my_name AS name").
+func (b *OciBuilder) Select(cols ...string) *SelectQuery {
+	return NewSelectQuery(b, b.db).Select(cols...)
+}
+
+// Model returns a new ModelQuery object that can be used to perform model-based DB operations.
+// The model passed to this method should be a pointer to a model struct.
+func (b *OciBuilder) Model(model interface{}) *ModelQuery {
+	return NewModelQuery(model, b.db.FieldMapper, b.db, b)
+}
+
+// GeneratePlaceholder generates an anonymous parameter placeholder with the given parameter ID.
+func (b *OciBuilder) GeneratePlaceholder(i int) string {
+	return fmt.Sprintf(":p%v", i)
+}
+
+// QueryBuilder returns the query builder supporting the current DB.
+func (b *OciBuilder) QueryBuilder() QueryBuilder {
+	return b.qb
+}
+
+// DropIndex creates a Query that can be used to remove the named index from a table.
+func (b *OciBuilder) DropIndex(table, name string) *Query {
+	sql := fmt.Sprintf("DROP INDEX %v", b.db.QuoteColumnName(name))
+	return b.NewQuery(sql)
+}
+
+// RenameTable creates a Query that can be used to rename a table.
+func (b *OciBuilder) RenameTable(oldName, newName string) *Query {
+	sql := fmt.Sprintf("ALTER TABLE %v RENAME TO %v", b.db.QuoteTableName(oldName), b.db.QuoteTableName(newName))
+	return b.NewQuery(sql)
+}
+
+// AlterColumn creates a Query that can be used to change the definition of a table column.
+func (b *OciBuilder) AlterColumn(table, col, typ string) *Query {
+	col = b.db.QuoteColumnName(col)
+	sql := fmt.Sprintf("ALTER TABLE %v MODIFY %v %v", b.db.QuoteTableName(table), col, typ)
+	return b.NewQuery(sql)
+}
+
+// BuildOrderByAndLimit generates the ORDER BY and LIMIT clauses.
+func (q *OciQueryBuilder) BuildOrderByAndLimit(sql string, cols []string, limit int64, offset int64) string {
+	if orderBy := q.BuildOrderBy(cols); orderBy != "" {
+		sql += "\n" + orderBy
+	}
+
+	c := ""
+	if offset > 0 {
+		c = fmt.Sprintf("rowNumId > %v", offset)
+	}
+	if limit >= 0 {
+		if c != "" {
+			c += " AND "
+		}
+		c += fmt.Sprintf("rowNum <= %v", limit)
+	}
+
+	if c == "" {
+		return sql
+	}
+
+	return `WITH USER_SQL AS (` + sql + `),
+	PAGINATION AS (SELECT USER_SQL.*, rownum as rowNumId FROM USER_SQL)
+SELECT * FROM PAGINATION WHERE ` + c
+}