spannerbuilder

README

spannerbuilder

spanner sql builder for select statements

supported methods

• Select
  • Syntax: .Select(statement, col1, col2, ...)
  • .Select("field_name") // special case, same as .Select("field_name", "field_name")
  • .Select("DISTINCT field_name", "field_name")
  • .Select("COUNT(*)", "field_name")
  • .Select("field_name1, field_name2", "field_name1", "field_name2")
  • .Select("field_name1").Select("field_name2") // only field_name2 will be selected
• Join
  • .Join("table_name USING(field_name)")
  • .Join("table_name USING(field_name)", "LEFT OUTER")
  • .Join("table_name USING(field_name)", "RIGHT", "OUTER")
  • .Join("table_name USING(field_name)").Join("table_name USING(field_name)")
  • .Join("table_name1@{FORCE_INDEX=index_name} ON table_name1.field_name = table_name2.field_name")
• Index
  • .Index("index_name")
• OrderBy
  • .OrderBy("field_name")
  • .OrderBy("field_name DESC")
• Where
  • .Where("field_name <op> ?", varName)
  • .Where("field_name <op> @field_name", map[string]interface{}{"field_name": verName})
• GroupBy
  • .Select("Sum(field_name1), field_name2", "field_name1", "field_name2"). GroupBy("group_by_expression")
• Having (with GroupBy, Select)
  • .Select("Sum(field_name1), field_name2", "field_name1", "field_name2"). GroupBy("group_by_expression").Having("SUM(field_name1) > 0")
  • .Select("Sum(field_name1), field_name2", "field_name1", "field_name2"). GroupBy("group_by_expression").Having("SUM(field_name1) > ?", 1)
  • .Select("Sum(field_name1), field_name2", "field_name1", "field_name2"). GroupBy("group_by_expression").Having("SUM(field_name1) > @param0", map[string]interface{}{"param0": 1})
  • Having (with GroupBy, Select, Where)
    • .Select("Sum(field_name1), field_name2", "field_name1", "field_name2"). Where("field_name2 == ?", "something"). GroupBy("group_by_expression").Having("SUM(field_name1) > @param0", map[string]interface{}{"param0": 1})
• Limit
  • .Limit(20)
• Offset (with Limit)
  • .Limit(20).Offset(10)
• From
  • .From("table_name")
  • .From("table_name@{FORCE_INDEX=index_name}")
• TableSample
  • .TableSample("RESERVOIR (100 ROWS)"),
  • .TableSample("BERNOULLI (0.1 PERCENT)")
• Statement
  • .Statement("SELECT * FROM users WHERE user_id = ?", "test")
  • .Statement("SELECT * FROM users WHERE user_id = '{0}'", "test")
  • .Statement("SELECT * FROM users WHERE user_id IN ({0}, {1})", 1, 2)
  • .Statement("SELECT * FROM users WHERE user_id = @userId", map[string]interface{}{"userId": "test"})
  • .Statement("SELECT * FROM users WHERE user_id = '{userId}'", map[string]interface{}{"userId": "test"})

SQL Logging

• set DB_DEBUG=1 to output SQL Log

Documentation

Index

• type Builder
  • func NewSpannerBuilder(table string, cols, keys []string) *Builder
  • func (b *Builder) Columns() []string
  • func (b *Builder) From(table string) *Builder
  • func (b *Builder) GetSelectStatement() spanner.Statement
  • func (b *Builder) GroupBy(s string) *Builder
  • func (b *Builder) Having(s string, args ...interface{}) *Builder
  • func (b *Builder) Index(index string) *Builder
  • func (b *Builder) Join(s string, joinType ...string) *Builder
  • func (b *Builder) Limit(i int) *Builder
  • func (b *Builder) Offset(i int) *Builder
  • func (b *Builder) OrderBy(s string) *Builder
  • func (b *Builder) Select(s string, cols ...string) *Builder
  • func (b *Builder) Statement(sql string, args ...interface{}) *Builder
  • func (b *Builder) TableSample(s string) *Builder
  • func (b *Builder) Where(s string, args ...interface{}) *Builder

Types

type Builder

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

func NewSpannerBuilder

func NewSpannerBuilder(table string, cols, keys []string) *Builder

func (*Builder) Columns

func (b *Builder) Columns() []string

func (*Builder) From

func (b *Builder) From(table string) *Builder

func (*Builder) GetSelectStatement

func (b *Builder) GetSelectStatement() spanner.Statement

func (*Builder) GroupBy

func (b *Builder) GroupBy(s string) *Builder

func (*Builder) Having

func (b *Builder) Having(s string, args ...interface{}) *Builder

func (*Builder) Index

func (b *Builder) Index(index string) *Builder

func (*Builder) Join

func (b *Builder) Join(s string, joinType ...string) *Builder

func (*Builder) Limit

func (b *Builder) Limit(i int) *Builder

func (*Builder) Offset

func (b *Builder) Offset(i int) *Builder

func (*Builder) OrderBy

func (b *Builder) OrderBy(s string) *Builder

func (*Builder) Select

func (b *Builder) Select(s string, cols ...string) *Builder

func (*Builder) Statement

func (b *Builder) Statement(sql string, args ...interface{}) *Builder

func (*Builder) TableSample

func (b *Builder) TableSample(s string) *Builder

func (*Builder) Where

func (b *Builder) Where(s string, args ...interface{}) *Builder