squirrel

package module
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 Go to latest Published: Oct 30, 2022 License: MIT Imports: 12 Imported by: 0

README

Squirrel is "complete".

Bug fixes will still be merged (slowly). Bug reports are welcome, but I will not necessarily respond to them. If another fork (or substantially similar project) actively improves on what Squirrel does, let me know and I may link to it here.

Squirrel - fluent SQL generator for Go

import "github.com/MindMayhem/squirrel"

GoDoc Build Status

Squirrel is not an ORM. For an application of Squirrel, check out structable, a table-struct mapper

Squirrel helps you build SQL queries from composable parts:

import sq "github.com/MindMayhem/squirrel"

users := sq.Select("*").From("users").Join("emails USING (email_id)")

active := users.Where(sq.Eq{"deleted_at": nil})

sql, args, err := active.ToSql()

sql == "SELECT * FROM users JOIN emails USING (email_id) WHERE deleted_at IS NULL"

sql, args, err := sq.
    Insert("users").Columns("name", "age").
    Values("moe", 13).Values("larry", sq.Expr("? + 5", 12)).
    ToSql()

sql == "INSERT INTO users (name,age) VALUES (?,?),(?,? + 5)"

Squirrel can also execute queries directly:

stooges := users.Where(sq.Eq{"username": []string{"moe", "larry", "curly", "shemp"}})
three_stooges := stooges.Limit(3)
rows, err := three_stooges.RunWith(db).Query()

// Behaves like:
rows, err := db.Query("SELECT * FROM users WHERE username IN (?,?,?,?) LIMIT 3",
                      "moe", "larry", "curly", "shemp")

Squirrel makes conditional query building a breeze:

if len(q) > 0 {
    users = users.Where("name LIKE ?", fmt.Sprint("%", q, "%"))
}

Squirrel wants to make your life easier:

// StmtCache caches Prepared Stmts for you
dbCache := sq.NewStmtCache(db)

// StatementBuilder keeps your syntax neat
mydb := sq.StatementBuilder.RunWith(dbCache)
select_users := mydb.Select("*").From("users")

Squirrel loves PostgreSQL:

psql := sq.StatementBuilder.PlaceholderFormat(sq.Dollar)

// You use question marks for placeholders...
sql, _, _ := psql.Select("*").From("elephants").Where("name IN (?,?)", "Dumbo", "Verna").ToSql()

/// ...squirrel replaces them using PlaceholderFormat.
sql == "SELECT * FROM elephants WHERE name IN ($1,$2)"


/// You can retrieve id ...
query := sq.Insert("nodes").
    Columns("uuid", "type", "data").
    Values(node.Uuid, node.Type, node.Data).
    Suffix("RETURNING \"id\"").
    RunWith(m.db).
    PlaceholderFormat(sq.Dollar)

query.QueryRow().Scan(&node.id)

You can escape question marks by inserting two question marks:

SELECT * FROM nodes WHERE meta->'format' ??| array[?,?]

will generate with the Dollar Placeholder:

SELECT * FROM nodes WHERE meta->'format' ?| array[$1,$2]

FAQ

  • How can I build an IN query on composite keys / tuples, e.g. WHERE (col1, col2) IN ((1,2),(3,4))? (#104)

    Squirrel does not explicitly support tuples, but you can get the same effect with e.g.:

    sq.Or{
  sq.Eq{"col1": 1, "col2": 2},
  sq.Eq{"col1": 3, "col2": 4}}

    WHERE (col1 = 1 AND col2 = 2) OR (col1 = 3 AND col2 = 4)

    (which should produce the same query plan as the tuple version)

  • Why doesn't Eq{"mynumber": []uint8{1,2,3}} turn into an IN query? (#114)

    Values of type []byte are handled specially by database/sql. In Go, byte is just an alias of uint8, so there is no way to distinguish []uint8 from []byte.

  • Some features are poorly documented!

    This isn't a frequent complaints section!

  • Some features are poorly documented?

    Yes. The tests should be considered a part of the documentation; take a look at those for ideas on how to express more complex queries.

License

Squirrel is released under the MIT License.

Documentation

Overview

Package squirrel provides a fluent SQL generator.

See https://github.com/MindMayhem/squirrel for examples.

Index

Constants

This section is empty.

Variables

View Source 
var (
	// Question is a PlaceholderFormat instance that leaves placeholders as
	// question marks.
	Question = questionFormat{}

	// Dollar is a PlaceholderFormat instance that replaces placeholders with
	// dollar-prefixed positional placeholders (e.g. $1, $2, $3).
	Dollar = dollarFormat{}

	// Colon is a PlaceholderFormat instance that replaces placeholders with
	// colon-prefixed positional placeholders (e.g. :1, :2, :3).
	Colon = colonFormat{}

	// AtP is a PlaceholderFormat instance that replaces placeholders with
	// "@p"-prefixed positional placeholders (e.g. @p1, @p2, @p3).
	AtP = atpFormat{}
)
View Source 
var NoContextSupport = errors.New("DB does not support Context")

NoContextSupport is returned if a db doesn't support Context.

View Source 
var RunnerNotQueryRunner = fmt.Errorf("cannot QueryRow; Runner is not a QueryRower")

RunnerNotQueryRunner is returned by QueryRow if the RunWith value doesn't implement QueryRower.

View Source 
var RunnerNotSet = fmt.Errorf("cannot run; no Runner set (RunWith)")

RunnerNotSet is returned by methods that need a Runner if it isn't set.

View Source 
var StatementBuilder = StatementBuilderType(builder.EmptyBuilder).PlaceholderFormat(Question)

StatementBuilder is a parent builder for other builders, e.g. SelectBuilder.

Functions

func Alias 

func Alias(expr Sqlizer, alias string) aliasExpr

Alias allows to define alias for column in SelectBuilder. Useful when column is defined as complex expression like IF or CASE Ex: 

.Column(Alias(caseStmt, "case_column"))

func ConcatExpr 

func ConcatExpr(parts ...interface{}) concatExpr

ConcatExpr builds an expression by concatenating strings and other expressions.

Ex: 

name_expr := Expr("CONCAT(?, ' ', ?)", firstName, lastName)
ConcatExpr("COALESCE(full_name,", name_expr, ")")

func DebugSqlizer 

func DebugSqlizer(s Sqlizer) string

DebugSqlizer calls ToSql on s and shows the approximate SQL to be executed

If ToSql returns an error, the result of this method will look like: "[ToSql error: %s]" or "[DebugSqlizer error: %s]"

IMPORTANT: As its name suggests, this function should only be used for debugging. While the string result *might* be valid SQL, this function does not try very hard to ensure it. Additionally, executing the output of this function with any untrusted user input is certainly insecure.

func Exec 

func Exec(ctx context.Context, db ExecerContext, s Sqlizer) (res pgconn.CommandTag, err error)

Exec ExecContexts the SQL returned by s with db.

func ExecWithNoContext 

func ExecWithNoContext(db Execer, s Sqlizer) (res pgconn.CommandTag, err error)

ExecWith Execs the SQL returned by s with db.

func Placeholders 

func Placeholders(count int) string

Placeholders returns a string with count ? placeholders joined with commas.

func Query 

func Query(ctx context.Context, db QueryerContext, s Sqlizer) (rows pgx.Rows, err error)

Query QueryContexts the SQL returned by s with db.

func QueryRow 

func QueryRow(ctx context.Context, db QueryRowerContext, s Sqlizer) pgx.Row

QueryRow QueryRowContexts the SQL returned by s with db.

func QueryWithNoContext 

func QueryWithNoContext(db Queryer, s Sqlizer) (rows pgx.Rows, err error)

QueryWith Querys the SQL returned by s with db.

Types

type And 

type And conj

And conjunction Sqlizers

func (And) ToSql 

func (a And) ToSql() (string, []interface{}, error)

type ArrayContains 

type ArrayContains map[string]interface{}

ArrayContains is syntactic sugar for use with Arrays

func (ArrayContains) ToSql 

func (ac ArrayContains) ToSql() (sql string, args []interface{}, err error)

type BaseRunner 

type BaseRunner interface {
	Execer
	Queryer
}

BaseRunner groups the Execer and Queryer interfaces.

type Between 

type Between struct {
	Field string
	Lower *int32
	Upper *int32
}

func (Between) ToSql 

func (ac Between) ToSql() (sql string, args []interface{}, err error)

type CaseBuilder 

type CaseBuilder builder.Builder

CaseBuilder builds SQL CASE construct which could be used as parts of queries.

func Case 

func Case(what ...interface{}) CaseBuilder

Case returns a new CaseBuilder "what" represents case value

func (CaseBuilder) Else 

func (b CaseBuilder) Else(expr interface{}) CaseBuilder

What sets optional "ELSE ..." part for CASE construct

func (CaseBuilder) MustSql 

func (b CaseBuilder) MustSql() (string, []interface{})

MustSql builds the query into a SQL string and bound args. It panics if there are any errors.

func (CaseBuilder) ToSql 

func (b CaseBuilder) ToSql() (string, []interface{}, error)

ToSql builds the query into a SQL string and bound args.

func (CaseBuilder) When 

func (b CaseBuilder) When(when interface{}, then interface{}) CaseBuilder

When adds "WHEN ... THEN ..." part to CASE construct

type DeleteBuilder 

type DeleteBuilder builder.Builder

DeleteBuilder builds SQL DELETE statements.

func Delete 

func Delete(from string) DeleteBuilder

Delete returns a new DeleteBuilder with the given table name.

See DeleteBuilder.Table.

func (DeleteBuilder) Exec 

func (b DeleteBuilder) Exec(ctx context.Context) (pgconn.CommandTag, error)

ExecContext builds and ExecContexts the query with the Runner set by RunWith.

func (DeleteBuilder) From 

func (b DeleteBuilder) From(from string) DeleteBuilder

From sets the table to be deleted from.

func (DeleteBuilder) Limit 

func (b DeleteBuilder) Limit(limit uint64) DeleteBuilder

Limit sets a LIMIT clause on the query.

func (DeleteBuilder) MustSql 

func (b DeleteBuilder) MustSql() (string, []interface{})

MustSql builds the query into a SQL string and bound args. It panics if there are any errors.

func (DeleteBuilder) Offset 

func (b DeleteBuilder) Offset(offset uint64) DeleteBuilder

Offset sets a OFFSET clause on the query.

func (DeleteBuilder) OrderBy 

func (b DeleteBuilder) OrderBy(orderBys ...string) DeleteBuilder

OrderBy adds ORDER BY expressions to the query.

func (DeleteBuilder) PlaceholderFormat 

func (b DeleteBuilder) PlaceholderFormat(f PlaceholderFormat) DeleteBuilder

PlaceholderFormat sets PlaceholderFormat (e.g. Question or Dollar) for the query.

func (DeleteBuilder) Prefix 

func (b DeleteBuilder) Prefix(sql string, args ...interface{}) DeleteBuilder

Prefix adds an expression to the beginning of the query

func (DeleteBuilder) PrefixExpr 

func (b DeleteBuilder) PrefixExpr(expr Sqlizer) DeleteBuilder

PrefixExpr adds an expression to the very beginning of the query

func (DeleteBuilder) Query 

func (b DeleteBuilder) Query(ctx context.Context) (pgx.Rows, error)

QueryContext builds and QueryContexts the query with the Runner set by RunWith.

func (DeleteBuilder) QueryRow 

func (b DeleteBuilder) QueryRow(ctx context.Context) RowScanner

QueryRowContext builds and QueryRowContexts the query with the Runner set by RunWith.

func (DeleteBuilder) RunWith 

func (b DeleteBuilder) RunWith(runner RunnerContext) DeleteBuilder

RunWith sets a Runner (like database/sql.DB) to be used with e.g. Exec.

func (DeleteBuilder) Scan 

func (b DeleteBuilder) Scan(ctx context.Context, dest ...interface{}) error

ScanContext is a shortcut for QueryRowContext().Scan.

func (DeleteBuilder) Suffix 

func (b DeleteBuilder) Suffix(sql string, args ...interface{}) DeleteBuilder

Suffix adds an expression to the end of the query

func (DeleteBuilder) SuffixExpr 

func (b DeleteBuilder) SuffixExpr(expr Sqlizer) DeleteBuilder

SuffixExpr adds an expression to the end of the query

func (DeleteBuilder) ToSql 

func (b DeleteBuilder) ToSql() (string, []interface{}, error)

ToSql builds the query into a SQL string and bound args.

func (DeleteBuilder) Where 

func (b DeleteBuilder) Where(pred interface{}, args ...interface{}) DeleteBuilder

Where adds WHERE expressions to the query.

See SelectBuilder.Where for more information.

type Eq 

type Eq map[string]interface{}

Eq is syntactic sugar for use with Where/Having/Set methods.

func (Eq) ToSql 

func (eq Eq) ToSql() (sql string, args []interface{}, err error)

type Execer 

type Execer interface {
	ExecNoContext(query string, args ...interface{}) (pgconn.CommandTag, error)
}

Execer is the interface that wraps the Exec method.

Exec executes the given query as implemented by database/sql.Exec.

type ExecerContext 

type ExecerContext interface {
	Exec(ctx context.Context, sql string, arguments ...any) (pgconn.CommandTag, error)
}

ExecerContext is the interface that wraps the ExecContext method.

Exec executes the given query as implemented by database/sql.ExecContext.

type Gt 

type Gt Lt

Gt is syntactic sugar for use with Where/Having/Set methods. Ex: 

.Where(Gt{"id": 1}) == "id > 1"

func (Gt) ToSql 

func (gt Gt) ToSql() (sql string, args []interface{}, err error)

type GtOrEq 

type GtOrEq Lt

GtOrEq is syntactic sugar for use with Where/Having/Set methods. Ex: 

.Where(GtOrEq{"id": 1}) == "id >= 1"

func (GtOrEq) ToSql 

func (gtOrEq GtOrEq) ToSql() (sql string, args []interface{}, err error)

type ILike 

type ILike Like

ILike is syntactic sugar for use with ILIKE conditions. Ex: 

.Where(ILike{"name": "sq%"})

func (ILike) ToSql 

func (ilk ILike) ToSql() (sql string, args []interface{}, err error)

type InsertBuilder 

type InsertBuilder builder.Builder

InsertBuilder builds SQL INSERT statements.

func Insert 

func Insert(into string) InsertBuilder

Insert returns a new InsertBuilder with the given table name.

See InsertBuilder.Into.

func Replace 

func Replace(into string) InsertBuilder

Replace returns a new InsertBuilder with the statement keyword set to "REPLACE" and with the given table name.

See InsertBuilder.Into.

func (InsertBuilder) Columns 

func (b InsertBuilder) Columns(columns ...string) InsertBuilder

Columns adds insert columns to the query.

func (InsertBuilder) Exec 

func (b InsertBuilder) Exec(ctx context.Context) (pgconn.CommandTag, error)

ExecContext builds and ExecContexts the query with the Runner set by RunWith.

func (InsertBuilder) Into 

func (b InsertBuilder) Into(from string) InsertBuilder

Into sets the INTO clause of the query.

func (InsertBuilder) MustSql 

func (b InsertBuilder) MustSql() (string, []interface{})

MustSql builds the query into a SQL string and bound args. It panics if there are any errors.

func (InsertBuilder) Options 

func (b InsertBuilder) Options(options ...string) InsertBuilder

Options adds keyword options before the INTO clause of the query.

func (InsertBuilder) PlaceholderFormat 

func (b InsertBuilder) PlaceholderFormat(f PlaceholderFormat) InsertBuilder

PlaceholderFormat sets PlaceholderFormat (e.g. Question or Dollar) for the query.

func (InsertBuilder) Prefix 

func (b InsertBuilder) Prefix(sql string, args ...interface{}) InsertBuilder

Prefix adds an expression to the beginning of the query

func (InsertBuilder) PrefixExpr 

func (b InsertBuilder) PrefixExpr(expr Sqlizer) InsertBuilder

PrefixExpr adds an expression to the very beginning of the query

func (InsertBuilder) Query 

func (b InsertBuilder) Query(ctx context.Context) (pgx.Rows, error)

QueryContext builds and QueryContexts the query with the Runner set by RunWith.

func (InsertBuilder) QueryRow 

func (b InsertBuilder) QueryRow(ctx context.Context) RowScanner

QueryRowContext builds and QueryRowContexts the query with the Runner set by RunWith.

func (InsertBuilder) RunWith 

func (b InsertBuilder) RunWith(runner RunnerContext) InsertBuilder

RunWith sets a Runner (like database/sql.DB) to be used with e.g. Exec.

func (InsertBuilder) Scan 

func (b InsertBuilder) Scan(ctx context.Context, dest ...interface{}) error

ScanContext is a shortcut for QueryRowContext().Scan.

func (InsertBuilder) Select 

func (b InsertBuilder) Select(sb SelectBuilder) InsertBuilder

Select set Select clause for insert query If Values and Select are used, then Select has higher priority

func (InsertBuilder) SetMap 

func (b InsertBuilder) SetMap(clauses map[string]interface{}) InsertBuilder

SetMap set columns and values for insert builder from a map of column name and value note that it will reset all previous columns and values was set if any

func (InsertBuilder) Suffix 

func (b InsertBuilder) Suffix(sql string, args ...interface{}) InsertBuilder

Suffix adds an expression to the end of the query

func (InsertBuilder) SuffixExpr 

func (b InsertBuilder) SuffixExpr(expr Sqlizer) InsertBuilder

SuffixExpr adds an expression to the end of the query

func (InsertBuilder) ToSql 

func (b InsertBuilder) ToSql() (string, []interface{}, error)

ToSql builds the query into a SQL string and bound args.

func (InsertBuilder) Values 

func (b InsertBuilder) Values(values ...interface{}) InsertBuilder

Values adds a single row's values to the query.

type Like 

type Like map[string]interface{}

Like is syntactic sugar for use with LIKE conditions. Ex: 

.Where(Like{"name": "%irrel"})

func (Like) ToSql 

func (lk Like) ToSql() (sql string, args []interface{}, err error)

type Lt 

type Lt map[string]interface{}

Lt is syntactic sugar for use with Where/Having/Set methods. Ex: 

.Where(Lt{"id": 1})

func (Lt) ToSql 

func (lt Lt) ToSql() (sql string, args []interface{}, err error)

type LtOrEq 

type LtOrEq Lt

LtOrEq is syntactic sugar for use with Where/Having/Set methods. Ex: 

.Where(LtOrEq{"id": 1}) == "id <= 1"

func (LtOrEq) ToSql 

func (ltOrEq LtOrEq) ToSql() (sql string, args []interface{}, err error)

type NotEq 

type NotEq Eq

NotEq is syntactic sugar for use with Where/Having/Set methods. Ex: 

.Where(NotEq{"id": 1}) == "id <> 1"

func (NotEq) ToSql 

func (neq NotEq) ToSql() (sql string, args []interface{}, err error)

type NotILike 

type NotILike Like

NotILike is syntactic sugar for use with ILIKE conditions. Ex: 

.Where(NotILike{"name": "sq%"})

func (NotILike) ToSql 

func (nilk NotILike) ToSql() (sql string, args []interface{}, err error)

type NotLike 

type NotLike Like

NotLike is syntactic sugar for use with LIKE conditions. Ex: 

.Where(NotLike{"name": "%irrel"})

func (NotLike) ToSql 

func (nlk NotLike) ToSql() (sql string, args []interface{}, err error)

type Or 

type Or conj

Or conjunction Sqlizers

func (Or) ToSql 

func (o Or) ToSql() (string, []interface{}, error)

type PlaceholderFormat 

type PlaceholderFormat interface {
	ReplacePlaceholders(sql string) (string, error)
}

PlaceholderFormat is the interface that wraps the ReplacePlaceholders method.

ReplacePlaceholders takes a SQL statement and replaces each question mark placeholder with a (possibly different) SQL placeholder.

type QueryRower 

type QueryRower interface {
	QueryRowNoContext(query string, args ...interface{}) RowScanner
}

QueryRower is the interface that wraps the QueryRow method.

QueryRow executes the given query as implemented by database/sql.QueryRow.

type QueryRowerContext 

type QueryRowerContext interface {
	QueryRow(ctx context.Context, sql string, args ...any) pgx.Row
}

QueryRowerContext is the interface that wraps the QueryRowContext method.

QueryRowContext executes the given query as implemented by database/sql.QueryRowContext.

type Queryer 

type Queryer interface {
	QueryNoContext(query string, args ...interface{}) (pgx.Rows, error)
}

Queryer is the interface that wraps the Query method.

Query executes the given query as implemented by database/sql.Query.

type QueryerContext 

type QueryerContext interface {
	Query(ctx context.Context, sql string, args ...any) (pgx.Rows, error)
}

QueryerContext is the interface that wraps the QueryContext method.

QueryContext executes the given query as implemented by database/sql.QueryContext.

type Row 

type Row struct {
	RowScanner
	// contains filtered or unexported fields
}

Row wraps database/sql.Row to let squirrel return new errors on Scan.

func (*Row) Scan 

func (r *Row) Scan(dest ...interface{}) error

Scan returns Row.err or calls RowScanner.Scan.

type RowScanner 

type RowScanner interface {
	Scan(...interface{}) error
}

RowScanner is the interface that wraps the Scan method.

Scan behaves like database/sql.Row.Scan.

func QueryRowWithNoContext 

func QueryRowWithNoContext(db QueryRower, s Sqlizer) RowScanner

QueryRowWith QueryRows the SQL returned by s with db.

type Runner 

type Runner interface {
	Execer
	Queryer
	QueryRower
}

Runner groups the Execer, Queryer, and QueryRower interfaces.

func WrapStdSql 

func WrapStdSql(stdSql StdSql) Runner

WrapStdSql wraps a type implementing the standard SQL interface with methods that squirrel expects.

type RunnerContext 

type RunnerContext interface {
	QueryerContext
	QueryRowerContext
	ExecerContext
}

RunnerContext groups the Runner interface, along with the Context versions of each of its methods

func WrapStdSqlCtx 

func WrapStdSqlCtx(stdSqlCtx StdSqlCtx) RunnerContext

WrapStdSqlCtx wraps a type implementing the standard SQL interface plus the context versions of the methods with methods that squirrel expects.

type SelectBuilder 

type SelectBuilder builder.Builder

SelectBuilder builds SQL SELECT statements.

func Select 

func Select(columns ...string) SelectBuilder

Select returns a new SelectBuilder, optionally setting some result columns.

See SelectBuilder.Columns.

func (SelectBuilder) Column 

func (b SelectBuilder) Column(column interface{}, args ...interface{}) SelectBuilder

Column adds a result column to the query. Unlike Columns, Column accepts args which will be bound to placeholders in the columns string, for example: 

Column("IF(col IN ("+squirrel.Placeholders(3)+"), 1, 0) as col", 1, 2, 3)

func (SelectBuilder) Columns 

func (b SelectBuilder) Columns(columns ...string) SelectBuilder

Columns adds result columns to the query.

func (SelectBuilder) CrossJoin 

func (b SelectBuilder) CrossJoin(join string, rest ...interface{}) SelectBuilder

CrossJoin adds a CROSS JOIN clause to the query.

func (SelectBuilder) Distinct 

func (b SelectBuilder) Distinct() SelectBuilder

Distinct adds a DISTINCT clause to the query.

func (SelectBuilder) Exec 

func (b SelectBuilder) Exec(ctx context.Context) (pgconn.CommandTag, error)

ExecContext builds and ExecContexts the query with the Runner set by RunWith.

func (SelectBuilder) From 

func (b SelectBuilder) From(from string) SelectBuilder

From sets the FROM clause of the query.

func (SelectBuilder) FromSelect 

func (b SelectBuilder) FromSelect(from SelectBuilder, alias string) SelectBuilder

FromSelect sets a subquery into the FROM clause of the query.

func (SelectBuilder) GroupBy 

func (b SelectBuilder) GroupBy(groupBys ...string) SelectBuilder

GroupBy adds GROUP BY expressions to the query.

func (SelectBuilder) Having 

func (b SelectBuilder) Having(pred interface{}, rest ...interface{}) SelectBuilder

Having adds an expression to the HAVING clause of the query.

See Where.

func (SelectBuilder) InnerJoin 

func (b SelectBuilder) InnerJoin(join string, rest ...interface{}) SelectBuilder

InnerJoin adds a INNER JOIN clause to the query.

func (SelectBuilder) Join 

func (b SelectBuilder) Join(join string, rest ...interface{}) SelectBuilder

Join adds a JOIN clause to the query.

func (SelectBuilder) JoinClause 

func (b SelectBuilder) JoinClause(pred interface{}, args ...interface{}) SelectBuilder

JoinClause adds a join clause to the query.

func (SelectBuilder) LeftJoin 

func (b SelectBuilder) LeftJoin(join string, rest ...interface{}) SelectBuilder

LeftJoin adds a LEFT JOIN clause to the query.

func (SelectBuilder) Limit 

func (b SelectBuilder) Limit(limit uint64) SelectBuilder

Limit sets a LIMIT clause on the query.

func (SelectBuilder) MustSql 

func (b SelectBuilder) MustSql() (string, []interface{})

MustSql builds the query into a SQL string and bound args. It panics if there are any errors.

func (SelectBuilder) Offset 

func (b SelectBuilder) Offset(offset uint64) SelectBuilder

Offset sets a OFFSET clause on the query.

func (SelectBuilder) Options 

func (b SelectBuilder) Options(options ...string) SelectBuilder

Options adds select option to the query

func (SelectBuilder) OrderBy 

func (b SelectBuilder) OrderBy(orderBys ...string) SelectBuilder

OrderBy adds ORDER BY expressions to the query.

func (SelectBuilder) OrderByClause 

func (b SelectBuilder) OrderByClause(pred interface{}, args ...interface{}) SelectBuilder

OrderByClause adds ORDER BY clause to the query.

func (SelectBuilder) PlaceholderFormat 

func (b SelectBuilder) PlaceholderFormat(f PlaceholderFormat) SelectBuilder

PlaceholderFormat sets PlaceholderFormat (e.g. Question or Dollar) for the query.

func (SelectBuilder) Prefix 

func (b SelectBuilder) Prefix(sql string, args ...interface{}) SelectBuilder

Prefix adds an expression to the beginning of the query

func (SelectBuilder) PrefixExpr 

func (b SelectBuilder) PrefixExpr(expr Sqlizer) SelectBuilder

PrefixExpr adds an expression to the very beginning of the query

func (SelectBuilder) Query 

func (b SelectBuilder) Query(ctx context.Context) (pgx.Rows, error)

QueryContext builds and QueryContexts the query with the Runner set by RunWith.

func (SelectBuilder) QueryRow 

func (b SelectBuilder) QueryRow(ctx context.Context) RowScanner

QueryRowContext builds and QueryRowContexts the query with the Runner set by RunWith.

func (SelectBuilder) RemoveColumns 

func (b SelectBuilder) RemoveColumns() SelectBuilder

RemoveColumns remove all columns from query. Must add a new column with Column or Columns methods, otherwise return a error.

func (SelectBuilder) RemoveLimit 

func (b SelectBuilder) RemoveLimit() SelectBuilder

Limit ALL allows to access all records with limit

func (SelectBuilder) RemoveOffset 

func (b SelectBuilder) RemoveOffset() SelectBuilder

RemoveOffset removes OFFSET clause.

func (SelectBuilder) RightJoin 

func (b SelectBuilder) RightJoin(join string, rest ...interface{}) SelectBuilder

RightJoin adds a RIGHT JOIN clause to the query.

func (SelectBuilder) RunWith 

func (b SelectBuilder) RunWith(runner RunnerContext) SelectBuilder

RunWith sets a Runner (like database/sql.DB) to be used with e.g. Exec. For most cases runner will be a database connection.

Internally we use this to mock out the database connection for testing.

func (SelectBuilder) Scan 

func (b SelectBuilder) Scan(ctx context.Context, dest ...interface{}) error

ScanContext is a shortcut for QueryRowContext().Scan.

func (SelectBuilder) Suffix 

func (b SelectBuilder) Suffix(sql string, args ...interface{}) SelectBuilder

Suffix adds an expression to the end of the query

func (SelectBuilder) SuffixExpr 

func (b SelectBuilder) SuffixExpr(expr Sqlizer) SelectBuilder

SuffixExpr adds an expression to the end of the query

func (SelectBuilder) ToSql 

func (b SelectBuilder) ToSql() (string, []interface{}, error)

ToSql builds the query into a SQL string and bound args.

func (SelectBuilder) Where 

func (b SelectBuilder) Where(pred interface{}, args ...interface{}) SelectBuilder

Where adds an expression to the WHERE clause of the query.

Expressions are ANDed together in the generated SQL.

Where accepts several types for its pred argument:

nil OR "" - ignored.

string - SQL expression. If the expression has SQL placeholders then a set of arguments must be passed as well, one for each placeholder.

map[string]interface{} OR Eq - map of SQL expressions to values. Each key is transformed into an expression like "<key> = ?", with the corresponding value bound to the placeholder. If the value is nil, the expression will be "<key> IS NULL". If the value is an array or slice, the expression will be "<key> IN (?,?,...)", with one placeholder for each item in the value. These expressions are ANDed together.

Where will panic if pred isn't any of the above types.

type Sqlizer 

type Sqlizer interface {
	ToSql() (string, []interface{}, error)
}

Sqlizer is the interface that wraps the ToSql method.

ToSql returns a SQL representation of the Sqlizer, along with a slice of args as passed to e.g. database/sql.Exec. It can also return an error.

func Expr 

func Expr(sql string, args ...interface{}) Sqlizer

Expr builds an expression from a SQL fragment and arguments.

Ex: 

Expr("FROM_UNIXTIME(?)", t)

type StatementBuilderType 

type StatementBuilderType builder.Builder

StatementBuilderType is the type of StatementBuilder.

func (StatementBuilderType) Delete 

func (b StatementBuilderType) Delete(from string) DeleteBuilder

Delete returns a DeleteBuilder for this StatementBuilderType.

func (StatementBuilderType) Insert 

func (b StatementBuilderType) Insert(into string) InsertBuilder

Insert returns a InsertBuilder for this StatementBuilderType.

func (StatementBuilderType) PlaceholderFormat 

func (b StatementBuilderType) PlaceholderFormat(f PlaceholderFormat) StatementBuilderType

PlaceholderFormat sets the PlaceholderFormat field for any child builders.

func (StatementBuilderType) Replace 

func (b StatementBuilderType) Replace(into string) InsertBuilder

Replace returns a InsertBuilder for this StatementBuilderType with the statement keyword set to "REPLACE".

func (StatementBuilderType) RunWith 

func (b StatementBuilderType) RunWith(runner RunnerContext) StatementBuilderType

RunWith sets the RunWith field for any child builders.

func (StatementBuilderType) Select 

func (b StatementBuilderType) Select(columns ...string) SelectBuilder

Select returns a SelectBuilder for this StatementBuilderType.

func (StatementBuilderType) Update 

func (b StatementBuilderType) Update(table string) UpdateBuilder

Update returns a UpdateBuilder for this StatementBuilderType.

func (StatementBuilderType) Where 

func (b StatementBuilderType) Where(pred interface{}, args ...interface{}) StatementBuilderType

Where adds WHERE expressions to the query.

See SelectBuilder.Where for more information.

type StdSql 

type StdSql interface {
	QueryNoContext(string, ...interface{}) (pgx.Rows, error)
	QueryRowNoContext(string, ...interface{}) pgx.Row
	ExecNoContext(string, ...interface{}) (pgconn.CommandTag, error)
}

StdSql encompasses the standard methods of the *sql.DB type, and other types that wrap these methods.

type StdSqlCtx 

type StdSqlCtx interface {
	StdSql
	Query(context.Context, string, ...any) (pgx.Rows, error)
	QueryRow(context.Context, string, ...any) pgx.Row
	Exec(context.Context, string, ...any) (pgconn.CommandTag, error)
}

StdSqlCtx encompasses the standard methods of the *sql.DB type, along with the Context versions of those methods, and other types that wrap these methods.

type UpdateBuilder 

type UpdateBuilder builder.Builder

UpdateBuilder builds SQL UPDATE statements.

func Update 

func Update(table string) UpdateBuilder

Update returns a new UpdateBuilder with the given table name.

See UpdateBuilder.Table.

func (UpdateBuilder) Exec 

func (b UpdateBuilder) Exec(ctx context.Context) (pgconn.CommandTag, error)

ExecContext builds and ExecContexts the query with the Runner set by RunWith.

func (UpdateBuilder) Limit 

func (b UpdateBuilder) Limit(limit uint64) UpdateBuilder

Limit sets a LIMIT clause on the query.

func (UpdateBuilder) MustSql 

func (b UpdateBuilder) MustSql() (string, []interface{})

MustSql builds the query into a SQL string and bound args. It panics if there are any errors.

func (UpdateBuilder) Offset 

func (b UpdateBuilder) Offset(offset uint64) UpdateBuilder

Offset sets a OFFSET clause on the query.

func (UpdateBuilder) OrderBy 

func (b UpdateBuilder) OrderBy(orderBys ...string) UpdateBuilder

OrderBy adds ORDER BY expressions to the query.

func (UpdateBuilder) PlaceholderFormat 

func (b UpdateBuilder) PlaceholderFormat(f PlaceholderFormat) UpdateBuilder

PlaceholderFormat sets PlaceholderFormat (e.g. Question or Dollar) for the query.

func (UpdateBuilder) Prefix 

func (b UpdateBuilder) Prefix(sql string, args ...interface{}) UpdateBuilder

Prefix adds an expression to the beginning of the query

func (UpdateBuilder) PrefixExpr 

func (b UpdateBuilder) PrefixExpr(expr Sqlizer) UpdateBuilder

PrefixExpr adds an expression to the very beginning of the query

func (UpdateBuilder) Query 

func (b UpdateBuilder) Query(ctx context.Context) (pgx.Rows, error)

QueryContext builds and QueryContexts the query with the Runner set by RunWith.

func (UpdateBuilder) QueryRow 

func (b UpdateBuilder) QueryRow(ctx context.Context) pgx.Row

QueryRowContext builds and QueryRowContexts the query with the Runner set by RunWith.

func (UpdateBuilder) RunWith 

func (b UpdateBuilder) RunWith(runner RunnerContext) UpdateBuilder

RunWith sets a Runner (like database/sql.DB) to be used with e.g. Exec.

func (UpdateBuilder) Scan 

func (b UpdateBuilder) Scan(ctx context.Context, dest ...interface{}) error

ScanContext is a shortcut for QueryRowContext().Scan.

func (UpdateBuilder) Set 

func (b UpdateBuilder) Set(column string, value interface{}) UpdateBuilder

Set adds SET clauses to the query.

func (UpdateBuilder) SetMap 

func (b UpdateBuilder) SetMap(clauses map[string]interface{}) UpdateBuilder

SetMap is a convenience method which calls .Set for each key/value pair in clauses.

func (UpdateBuilder) Suffix 

func (b UpdateBuilder) Suffix(sql string, args ...interface{}) UpdateBuilder

Suffix adds an expression to the end of the query

func (UpdateBuilder) SuffixExpr 

func (b UpdateBuilder) SuffixExpr(expr Sqlizer) UpdateBuilder

SuffixExpr adds an expression to the end of the query

func (UpdateBuilder) Table 

func (b UpdateBuilder) Table(table string) UpdateBuilder

Table sets the table to be updated.

func (UpdateBuilder) ToSql 

func (b UpdateBuilder) ToSql() (string, []interface{}, error)

ToSql builds the query into a SQL string and bound args.

func (UpdateBuilder) Where 

func (b UpdateBuilder) Where(pred interface{}, args ...interface{}) UpdateBuilder

Where adds WHERE expressions to the query.

See SelectBuilder.Where for more information.

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