Introduction

qb is a fluent query builder for CFML. It is heavily inspired by Eloquent from Laravel.

Using qb, you can:

• Quickly scaffold simple queries

• Make complex, out-of-order queries possible

• Abstract away differences between database engines

Requirements

• Adobe ColdFusion 2018+

• Lucee 5+

qb supports four major database grammars:

• MySQL (MySQLGrammar@qb)

• Oracle (OracleGrammar@qb)

• Postgres (PostgresGrammar@qb)

• Microsoft SQL Server (SqlServerGrammar@qb)

• SQLite (SQLiteGrammar@qb)

Discussion & Help

The Box modules discussion group and community can be found here:

https://community.ortussolutions.com/c/box-modules/qb/27

Installation

Installation is easy through CommandBox and ForgeBox. Simply type box install qb to get started.

Code Samples

Compare these two examples:

// Plain old CFML
var results = queryExecute( "SELECT * FROM users" );

// qb
var qb = wirebox.getInstance( "QueryBuilder@qb" );
var results = qb.from( "users" ).get();

The differences become even more stark when we introduce more complexity:

// Plain old CFML
var results = queryExecute(
    "SELECT * FROM posts WHERE published_at IS NOT NULL AND author_id IN ?",
    [ { value = "5,10,27", cfsqltype = "CF_SQL_NUMERIC", list = true } ]
);

// qb
var qb = wirebox.getInstance( "QueryBuilder@qb" );
var results = qb.from( "posts" )
    .whereNotNull( "published_at" )
    .whereIn( "author_id", [ 5, 10, 27 ] )
    .get();

With qb you can easily handle setting order by statements before the columns you want or join statements after a where clause:

var qb = wirebox.getInstance( "QueryBuilder@qb" );
var results = qb.from( "posts" )
         .orderBy( "published_at" )
         .select( "post_id", "author_id", "title", "body" )
         .whereLike( "author", "Ja%" )
         .join( "authors", "authors.id", "=", "posts.author_id" )
         .get();

// Becomes
var results = queryExecute(
    "SELECT post_id, author_id, title, body FROM posts INNER JOIN authors ON authors.id = posts.author_id WHERE author LIKE ? ORDER BY published_at",
    [ { value = "Ja%", cfsqltype = "CF_SQL_VARCHAR", list = false, null = false } ]
);

qb enables you to explore new ways of organizing your code by letting you pass around a query builder object that will compile down to the right SQL without you having to keep track of the order, whitespace, or other SQL gotchas!

Here's a gist with an example of the powerful models you can create with this! https://gist.github.com/elpete/80d641b98025f16059f6476561d88202

Usage

To start a new query, instantiate a new Builder: wirebox.getInstance( "QueryBuilder@qb" ).

By default, qb uses a generic Grammar. You can specify your specific grammar in ColdBox by setting the defaultGrammar in your moduleSettings.

moduleSettings = {
    qb = {
        defaultGrammar = "MySQLGrammar@qb"
    }
};

If you are not using WireBox, just make sure to wire up the Builder object with the correct grammar:

var grammar = new qb.models.Query.Grammars.MySQLGrammar();
var builder = new qb.models.Query.Builder( grammar );

A query builder is a stateful, transient object. That means that if you want to execute two different queries, you need two separate instances of QueryBuilder.

As such, be careful when injecting QueryBuilder in to a component. If the component is a singleton, you will need to create the QueryBuilder inline or use a provider. This applies to ColdBox handlers as well.

While the above may seem innoculous, it can run in to issues as multiple requests come in to your application. Each request is sharing the same query builder instance and subsequent requests will have unintended results as the where clause keeps growing request after request.

The solution is to either create the QueryBuilder inline, ensuring that each request has its own query to execute:

Or to use a WireBox provider to create a new query each time it is accessed:

newQuery

Once you have access to a QueryBuilder instance, you can create a new query using the same datasource, utils, returnFormat, paginationCollector, columnFormatter, and defaultOptions as the current QueryBuilder instance.

We welcome all types of contributions!

The most common type of contribution is to fix an incorrect SQL generation for a database grammar.

To debug what SQL is being ran, you can always call toSQL on any QueryBuilder or SchemaBuilder object. Additionally, you can listen to the preQBExecute interception point for the generated SQL.

Each of the database grammars have two tests — {Grammar}QueryBuilderSpec.cfc and {Grammar}SchemaBuilderSpec.cfc. These tests run the same qb syntax across the different grammars. In each test are methods that return SQL strings like so:

// MSSQLQueryBuilderSpec.cfc
function orWhere() {
    // If just a string is returned, we assume the bindings is an empty array ([])
    return {
        sql = "SELECT * FROM [users] WHERE [id] = ? OR [email] = ?",
        bindings = [ 1, "foo" ]
    };
}

// OracleSchemaBuilderSpec.cfc
function boolean() {
    // returns an array since schema builder can execute multiple statements.
    return [ "CREATE TABLE ""USERS"" (""ACTIVE"" NUMBER(1, 0) NOT NULL)" ];
}

If you find an issue with the SQL generated from a grammar, please file a pull request with the correct SQL in these tests. It's okay if you don't submit a fix as well. (But we'd greatly appreciate it!) Doing so will help expedite the fix.

If you want to add support for a new database grammar, simply copy these two tests from an existing grammar, rename them, change the getBuilder method to return your new grammar, and fill out the SQL as it should be. That will guide your implementation to be 100% compatible with the other grammars in qb.

9.8.1

• Fix missing parseNumber function for ACF

• Add alias to clone()

9.8.0

Support alias renaming using withAlias

9.7.1

Add in missing join compilations.

9.7.0

Implement crossApply and outerApply for supported Grammars

9.6.1

Expand type annotation for from. This can be a string or an Expression.

9.6.0

Make addBindings and addBindingsFromBuilder publicly accessible.

9.5.1

Add MariaDB support to AutoDiscover@qb grammar. (It will choose the MySQLGrammar@qb.)

9.5.0

Add findOrFail and existsOrFail methods, inspired by Quick.

9.4.1

Better Support for OracleGrammar in SchemaBuilder

• Fix trigger creation by escaping colons (:).

• Try to drop associated sequences and triggers when dropping a table.

• Better support for creating a table in a different schema by only checking for the last identifier as the table name in hasTable and hasColumn.

9.4.0

Allow for setting a defaultSchema property on a SchemaBuilder instance.

The defaultSchema will be used for methods like hasTable and hasColumn. A passed in schema will still take precedence.

9.3.1

• Use CHAR for GUID and UUID types in MySQL.

• Don't call getUtils from inside QueryUtils.

9.3.0

Make replaceBindings publicly available in QueryUtils.

This is used by qb to inline query bindings in toSQL or dump calls and can be used to inline the bindings in other tools like CommandBox Migrations.

9.2.5

Use named parameters when passing to BaseGrammar. This avoids problems where custom Grammars have extra arguments and we add arguments to the official grammar.

9.2.4

New Features

• Add the ability to pretend to run queries, both in QueryBuilder and SchemaBuilder.

• Add query logging to QueryBuilder and SchemaBuilder instances.

Bug Fixes

• Use varchar for clob when converting to a CFML query. This is used when removing a column like in Oracle pagination.

9.2.3

Handle more numeric SQL types like AtomicInteger and Long.

9.2.2

Add millisecond accuracy to inline bindings.

9.2.1

Separate having bindings from where bindings.

9.2.0

New Features

We now support the returning function inside update and delete statements for supported Grammars. Supported grammars are SQL Server, Postgres, and SQLite.

Bug Fixes

• Fix raw table name parsing in update queries for SqlServerGrammar.

• Fix truncating text in nested wheres inside joins.

• Fix out of order bindings in joinSub

9.1.5

Switch from table_catalog to table_schema when referencing schema for PostgresGrammar.

9.1.4

CommandBox-friendly injections for SQL Commenter.

9.1.3

Add support for from bindings, used especially in fromSub queries.

9.1.2

This release reverts the use of native returntypes. There are too many bugs between engine implementations to make it viable. No end-user changes should be visible.

9.1.1

Make withReturnFormat a public method.

9.1.0

New Features

Add ability to inline bindings when calling toSQL and dump. These strings can be executed in a DBMS application.

Bug Fixes

• Move coldbox namespace injection to the function body so CommandBox doesn't blow up.

• Correctly apply native returntypes after newQuery and withReturnFormat.

9.0.2

• Fix losing defaultOptions when calling newQuery.

• Shortcut for no return format using none.

• Allow for native struct returntypes. Requires a return format of none.

9.0.1

Fix RouteInfoCommenter file name.

9.0.0

Breaking Changes

Dropped support for Adobe ColdFusion 2016

Adobe has ended support for ACF 2016, and so must we.

SchemaBuilder's uuid split into guid() and uuid()

CFML's uuid does not match other languages; it's one character shorter. Because of this, the value from createUUID() cannot be used in some database column types like SQL Server's uniqueidentifier. This made for some confusion in SchemaBuilder since it wasn't clear if uuid meant CFML's definition or the wider world's definition.

So, the types have been split, following Lucee's pattern, into uuid (matching CFML's createUUID()) and guid (matching Java's UUID or createGUID() on Lucee).

Returning all rows from paginate when maxRows is 0 or lower

Popular grid frameworks like Quasar and Datatables use values of 0 or -1 to return all rows from a query. This is now supported in qb. Previously, it generated an invalid query (SELECT * FROM users LIMIT 0 OFFSET 0).

This behavior can be customized by providing a callback to the shouldMaxRowsOverrideToAll setting or init argument. For instance, to revert to the previous behavior you would set the function as follows:

moduleSettings = {
    "qb": {
        "shouldMaxRowsOverrideToAll": function( maxRows ) {
            return false;
        }
    }
};

autoDeriveNumericType is now the default

Introduced in 8.10.0, this feature uses separate SQL types for integers and decimals to increase performance in certain database grammars. This feature is now the default, but the previous behavior can be enabled by setting autoDeriveNumericType to false.

strictDateDetection is now the default

Introduced in 8.1.0, this feature only returns a SQL type of CF_SQL_TIMESTAMP if the param is a date object, not just a string that looks like a date. This helps avoid situations where some strings were incorrectly interpreted as dates. For many, the migration path is straightforward — calls to now() are already date objects as well as any function that operates on a date. If you need to parse a string as a date, the parseDateTime built-in function can accomplish that.

New Features and Improvements

SQLite Grammar Support

Thanks to Jason Steinhouer, qb now supports SQLite for both QueryBuilder and SchemaBuilder. You can use it in your apps by specifying SQLiteGrammar@qb as the default grammar.

sqlCommenter Support

sqlCommenter is a specification by Google for adding contextual information as a comment at the end of a SQL statement. This can give insights into your application, especially when diagnosing slow queries. Examples of the information you can append to your queries are route, handler, action, version, and others, as well as the ability to add your own, such as loggedInUser and more.

sumRaw helper function

There's a new shortcut method to return qb.sum( qb.raw( expression ) ). You're welcome. 😉

Dedicated dropIndex method

Some grammars, like SQL Server, do not treat simple indexes as constraints. For this reason, we've added a dropIndex method alongside the existing dropConstraint.

columnList helper method

columnList will return either an array of column names for the configured table or the query that is generated by cfdbinfo for the configured table. Especially useful when working with dynamically generated grids.

Bug Fixes

• Correctly compile insertUsing statements that use Common Table Expressions (CTEs).

• Update announceInterception calls for ColdBox 7. (Thank you, Michael Born.)

• Fixed insertUsing not placing Common Table Expressions (CTEs) in the correct order.

• Added the missing keyword in the Postgres upsert syntax.

• Don't add DISTINCT when doing a COUNT(*).

• Support aggregates for unioned queries.

8.10.0

• Add a firstOrFail fetch method inspired by Quick.

• There are now specific numeric SQL types for integers and decimals used during the inferSQLType check in QueryUtils. This is an opt-in feature, enabled by setting the autoDeriveNumericType setting. The previous approach was to use CF_SQL_NUMERIC for all numeric types which could cause performance issues in some grammars as they interpreted all CF_SQL_NUMERIC as floating point numbers.

8.9.1

• HOLDLOCK and READPAST are mutually exclusive table locks in SQL Server but were mistakenly being applied together.

8.9.0

• Specify defaultOptions inside of your ColdBox config.

8.8.1

• Better parsing of raw statements when deriving insertUsing columns.

8.8.0

New Features and Improvements

• Insert data based off of a callback or builder using insertUsing.

• Insert data ignoring duplicate key errors using insertIgnore.

• Use a callback or builder as the source for an upsert statement.

• Allow for deleting unmatched source records in upserts (SQL Server only).

• Add a new skipLocked flag to lockForUpdate.

Bug Fixes

• Don't uppercase quoted aliases in Oracle.

• Fix for aliases in update statements.

• Don't sort columns for insertUsing.

• Add subquery bindings in insert and upsert statements.

• Maintain column order when using source in upsert.

8.7.8

• Fix for Oracle returning custom column types when renaming a column.

8.7.7

• Explicit arguments scoping.

8.7.6

• arrayEach is slow compared to merging arrays.

8.7.5

• Fix wheres with joins in update statements.

8.7.2

• Add better null handling to inferSqlType.

8.7.1

• Correctly format columns being updated.

8.7.0

New Features and Improvements

• Add an upsert method. upsert can update or insert multiple records at once depending on if a column is matched.

• Allow expressions in value and values. Also add a valueRaw and valuesRaw helper method to make that pattern more ergonomic.

• Allow JOIN statements in UPDATE statements. (This is not supported on Oracle.)

• Allow updates with subselects using closures or builder instances.

Bug Fixes

• Better handling of group by and having clauses in pagination queries.

• Allow any value to be returned from aggregates including strings, numbers, and dates.

• Provide default values for sum and count if no records are returned.

• Test in CI with full null support.

8.6.1

• Correctly wrap CTE expressions with parenthesis when required in certain grammars.

8.6.0

• SchemaBuilder can now be configured with default query options. (Default options will still be overridden by options passed to each SchemaBuilder method.)

8.5.0

QueryBuilder

• Add a reset method to QueryBuilder.

• Add locking helpers such as lock, noLock, lockForUpdate, and sharedLock.

• Correct return aggregate values for date values from max and min executors.

• Automatically add a scale to an incoming query param when needed.

• Add a whereNotLike shortcut method.

• Correctly format a COUNT(DISTINCT column) query.

• Only use bulk insert syntax when needed in OracleGrammar due to interactions between the result parameter to cfquery, Lucee, and the Oracle JDBC driver.

SchemaBuilder

• Add support for stored computed columns and virtual computed columns.

8.4.9

• Swap master branch to main branch.

8.4.8

• Remove unnecessary injection for QueryUtils.

8.4.7

• Account for raw expressions when generating mementos for comparison

8.4.6

• Add support for mediumtext & longtext types for MySQLGrammar.

8.4.5

• Fix limit on simplePaginate.

8.4.1 - 8.4.4

• Migrate release process to GitHub Actions.

8.4.0

• Add a simplePaginate pagination method for quicker performance when total records or total pages are not needed or too slow.

8.3.0

• Introduce a numericSQLType setting to specify the default numeric SQL type.

8.2.2

• Default to html for the dump format argument to writeDump.

8.2.1

• Correctly use the passed in strictDateDetection to the QueryUtils.cfc.

8.2.0

• Added a dump command to aid in debugging a query while chaining.

8.1.0

• orderByRaw now can accept bindings.

• A new, optional strictDateDetection setting is available to check the underlying Java class of a date object instead of using isDate.

8.0.3

• Ignore select bindings for aggregate queries.

• Allow spaces in table aliases.

• Split FLOAT and DECIMAL column types in SQL Server.

8.0.2

• Clear orderBy bindings when calling clearOrders.

8.0.1

• Trim table definitions before searching for aliases. Makes qb more lenient with extra whitespace.

8.0.0

BREAKING CHANGES

• ``when callbacks now automatically scope and group where clauses when an OR combinator is used.

Other Changes

• Combine clearOrders and orderBy with a new reordermethod.

• Clear current selected columns with clearSelect.

• Combine clearSelect and either select or selectRaw with reselect and reselectRaw respectively.

7.10.0

• Expose nested where functions to enable advanced query manipulation in downstream libraries like Quick.

7.9.9

• Fixes for OracleGrammar including table aliases and wrapped subqueries.

7.9.8

• Allow nullable timestamps in MySQL.

7.9.7

• Return 0 on null aggregates.

7.9.6

• Match type hints to documentation for join functions

7.9.5

• Handle enhanced numeric checks with Secure Profile enabled.

7.9.4

• Allow raw statements in basic where clauses.

7.9.3

• Passed along the options struct to the count method when calling paginate.

7.9.2

• Allow for space-delimited sort directions like column DESC.

• Add helpful message when trying to use a closure with from instead of fromSub.

• ``value and values now work with column formatters.

• Correctly format RETURNING clauses with column formatters and ignoring table qualifiers.

7.9.1

• Handle multi-word columns in queryRemoveColumns.

7.9.0

• Remove elvis operator due to ACF compatibility issues

7.8.0

• Add support for MONEY and SMALLMONEY data types to SchemaBuilder.

7.7.3

• Fix wrapping of enum types for Postgres.

7.7.2

• Compatibility fix for ACF 2018 and listLast parsing.

• Include current_timestamp default for timestamp columns in SchemaBuilder.

• Ignore table qualifiers for insert and update.

7.7.1

• Fix a bug with preventDuplicateJoins when using the closure syntax with a join.

7.7.0

• Add executionTime to the data output from BaseGrammar, including being available in interceptors.

7.6.2

• Fix a case where a column was not wrapped correctly when a where used a subquery for the value.

7.6.1

• Avoid duplicate function due to cbORM / Hibernate bugs when used in the same application.

7.6.0

• Split off a private whereBasic method. This is used in Quick to provide extra sql type features.

• Add a clearOrders method. Any already configured orders are cleared. Any orders added after this call will be added as normal.

• selectRaw now can take an array of expressions.

7.5.1

Fixed an issue using column formatters with update and insert.

7.5.0

Using a new preventDuplicateJoins setting in the module settings, qb can detect duplicate joins and ignore them. This is especially useful in a heavily filtered and dynamic query where you may or may not need the join at all or more than one column may need the same join. preventDuplicateJoins defaults to false, so it is opt-in. It may be turned on by default in a future breaking release of qb.

7.4.0

Enhance order by's with more direction options (c767ac8)

You can now use two shortcut methods: orderByAsc and orderByDesc. Additionally, orderBySub or using orderBy with a closure or builder instance will respect the direction argument.

7.3.15

• Fix using whereBetween with query param structs (07c9b72)

7.3.14

• Ignore orders in aggregate queries (39e1338)

7.3.13

• Format with cfformat (dc2a9b6)

7.3.12

• Improve column wrapping with trimming (d98a5cb)

• Prefer the parent query over magic methods when the parent query has the exact method. (f9fd8d1)

7.3.9, 7.3.10, 7.3.11

• Switch to using ForgeBox Storage.

7.3.8

• Allow passing query options in to paginate (cdecfb3)

7.3.7

• Fix for inserting null values directly (1de27a6)

7.3.5, 7.3.6

• Use cfformat for automatic formatting (119e434)

• Add a type to the onMissingMethod exception (90d1093)

7.3.4

• Correctly wrap comments in MySQLGrammar.

7.3.2, 7.3.3

• Publish qb apidocs to Ortus API Docs.

7.3.1

• Fix for null values breaking the new checkIsActuallyNumeric method in QueryUtils.

7.3.0

• Add a parameterLimit public property to SqlServerGrammar. This property is used in Quick to split up eager loading to work around the 2100 param limit of SQL Server.

7.2.0

• Allow a parent query to be set. A parent query will receive any method calls that are not found on the Query Builder instance. This is especially useful for instances like Quick to allow Quick features like scopes to be available inside any closures.

7.1.0

• Lambdas (arrow functions) are now allowed wherever closures are allowed.

• Add an orderByRaw method.

• Allow for fully-qualified column names (table_name.column.name) in the value and values methods.

7.0.0

BREAKING CHANGES

Please see the Migration Guide for more information on these changes.

• Drop support for Lucee 4.5 and Adobe ColdFusion 11.

• MSSQLGrammar renamed to SqlServerGrammar

• Remove variadic parameters support in builder functions like select.

• The defaultGrammar mapping needs to be the full WireBox mapping, including the @qb, if needed.

  • For instance, MSSQLGrammar would become MSSQLGrammar@qb.

  • This will allow for other grammars to be more easily contributed via third party modules.

• The argument names of forPage changed to match the new paginate method.

• Add defaultValue and optional exception throwing to value. (This changed the argument order.)

• All methods that could conceivably take a subquery as well as a value now accept a closure or another builder instance to use as a subquery. (This changed the argument names in some instances.)

Other Changes

• Completely revamped documentation! (You're looking at it right now.)

• Add new flag to toSQL( showBindings = true ) to replace question marks (?) with cfqueryparam-compatible structs for debugging.

• Preserve column case and order when converting a query to an array using the default "array" return format.

• Add a new paginate method to generate a pagination struct alongside the results. This can be customized using a custom PaginationCollector.

• Allow raw values in insert calls.

• Allow default queryExecute options to be configure at a Query Builder level. This also enables custom QueryBuilders a la Hyper.

• Add a whereLike method.

• Allow closures to be used in left and right joins.

• Provide an addUpdate method to programmatically build the SET clause of an update query.

• Add a new chunk method to grab records from the database in small sets.

• Add raw in alterTable segments.

• Add dropAllObjects support for SqlServerGrammar and OracleGrammar to support migrate fresh from cfmigrations.

• Add a renameTable alias for rename.

• Remove default constraints when dropping columns with a default on SqlServerGrammar.

• Add more column types and column helpers to SchemaBuilder, including:

  • datetimeTz

  • lineString

  • nullableTimestamps

  • point

  • polygon

  • softDeletes

  • softDeletesTz

  • timeTz

  • timestamps

  • timestampTz

  • timestampsTz

  • withCurrent

****

6.4.0

• Allow Expressions (query.raw) in update statements.

Specifying A Select Clause

You may not always want to select all columns from a database table. You can influence the select list of a query with the following methods.

Individual columns can contain fully-qualified names (some_table.some_column), table aliases (alias.some_column), and even set column aliases themselves (some_column AS c). The columns argument can be a single column, a list of columns (comma-separated), or an array of columns.

select

When calling select any previous columns are discarded. If you want to incrementally select columns, use the addSelect method.

If you pass no columns to this method, it will default to "*".

query.select( [ "fname AS firstName", "age" ] ).from( "users" );

SELECT `fname` AS `firstName`, `age` FROM `users`

distinct

Calling distinct will cause the query to be executed with the DISTINCT keyword.

query.select( "username" ).distinct().from( "users" );

SELECT DISTINCT `username` FROM `users`

addSelect

This method adds the columns passed to it to the currently selected columns.

query.addSelect( [ "fname AS firstName", "age" ] ).from( "users" );

SELECT `fname` AS `firstName`, `age` FROM `users`

selectRaw

A shortcut to use a raw expression in the select clause.

The expression is added to the other already selected columns.

(To learn more about raw and expressions, check out the docs on Raw Expressions.)

query.selectRaw( "YEAR(birthdate) AS birth_year" ).from( "users" );

SELECT YEAR(birthdate) AS birth_year FROM `users`

subSelect

The method lets you pass either a callback or a QueryBuilder instance to be used as a subselect expression. If a callback is passed it will be passed a new query instance as the only parameter.

The subselect is added to the other already selected columns.

query.subSelect( "last_login_date", function( q ) {
    q.selectRaw( "MAX(created_date)" )
        .from( "logins" )
        .whereColumn( "users.id", "logins.user_id" );
} ) ).from( "users" );

SELECT (
    SELECT MAX(created_date)
    FROM `logins`
    WHERE `users`.`id` = `logins`.`user_id`
) AS `last_login_date`
FROM `users

clearSelect

Clears out the selected columns for a query along with any configured select bindings.

query.from( "users" )
    .select( [ "fname AS firstName", "age" ] )
    .clearSelect();

SELECT * FROM `users`

reselect

Clears out the selected columns for a query along with any configured select bindings. Then sets a selection of columns to select from the query. Any valid argument to select can be passed here.

query.from( "users" )
    .select( [ "fname AS firstName", "age" ] )
    .reselect( "username" );

SELECT `username` FROM `users`

reselectRaw

Clears out the selected columns for a query along with any configured select bindings. Then adds an Expression or array of expressions to the already selected columns.

query.from( "users" )
    .select( [ "fname AS firstName", "age" ] )
    .reselectRaw( "YEAR(birthdate) AS birth_year" );

SELECT YEAR(birthdate) AS birth_year FROM `users`

limit

Sets the limit value for the query.

take

Sets the limit value for the query. Alias for .

offset

Sets the offset value for the query.

forPage

Helper method to calculate the limit and offset given a page number and count per page.

simplePaginate & paginate

qb includes a few methods to help you lock certain rows when executing select statements.

sharedLock

A shared lock prevents the selected rows from being modified until your transaction is committed.

lockForUpdate

A lock for update lock prevents the selected rows from being modified or selected with another shared lock until your transaction is committed.

The main difference between a sharedLock and lockForUpdate is that a lockForUpdate prevents other reads or selects as well as updates.

When using the skipLocked flag, the query will skip over locked records and only return and lock available records.

noLock

noLock will instruct your grammar to ignore any shared locks when executing the query.

Currently this only makes a difference in SQL Server grammars.

lock

The lock method will allow you to add a custom lock directive to your query. Think of it as the raw method for lock directives.

These lock directives vary from grammar to grammar.

clearLock

Clears any lock directive on the query.

Where Methods

where

Adds a where clause to a query.

Any of the following operators can be used in a where clause.

When using the "=" constraint, you can use a shortcut and define the value as the second argument.

To group where statements together, pass a function to the where clause as the only parameter.

A Function or QueryBuilder can be used as a subselect expression when passed to value.

andWhere

orWhere

whereBetween

Adds a where between clause to the query.

If a function or QueryBuilder is passed it is used as a subselect expression.

whereNotBetween

whereColumn

Adds a where clause to a query that compares two columns.

Just as with where, when using "=" as the operator you can use a shorthand passing the second column in as the operator and leaving the second column null.

Expressions can be passed in place of either column.

whereExists

Adds a where exists clause to the query.

It can be configured with a function.

It can also be configured with a QueryBuilder instance.

whereNotExists

whereLike

whereNotLike

whereIn

Adds a where in clause to the query.

The values passed to whereIn can be a single value, a list of values, or an array of values.

If a list of values is passed in, it is converted to an array of values using a single comma (",") delimiter.

Expressions can be freely mixed in with other values.

A function or QueryBuilder instance can be passed to be used as a subquery expression instead of a list of values.

whereNotIn

whereRaw

Shorthand to add a raw SQL statement to the where clauses.

whereNull

Adds a where null clause to the query.

whereNotNull

Dynamic Where Methods

qb uses onMissingMethod to provide a few different helpers when working with where... methods.

andWhere... and orWhere...

Every where... method in qb can be called prefixed with either and or or. Doing so will call the original method using the corresponding combinator.

where{Column}

If you call a method starting with where that does not match an existing qb method, qb will instead call the where method using the rest of the method name as the first column name. (The rest of the arguments will be shifted to account for this.) This also applies to andWhere{Column} and orWhere{Column} method signatures.

The orderBy method seems simple but has a lot of depth depending on the type of arguments you pass in.

Order By (String)

Calling orderBy multiple times will append to the order list.

Order By (List)

Order By (Array of Strings)

Order By (Array of Structs)

Order By (Subquery)

You can order with a subquery using either a function or a QueryBuilder instance.

Order By Raw

clearOrders

reorder

Join clauses range from simple to complex including joining complete subqueries on multiple conditions. qb has your back with all of these use cases.

join

Applies a join to the query. The simplest join is to a table based on two columns:

When doing a simple join using = as the operator, you can omit it and pass just the column names:

When you need to specify more clauses to join, you can pass a function as the second argument:

Conditions inside a join clause can be grouped using a function.

joinWhere

Adds a join to another table based on a WHERE clause instead of an ON clause. WHERE clauses introduce parameters and parameter bindings whereas on clauses join between columns and don't need parameter bindings.

For simple joins, this specifies a column on which to join the two tables:

joinRaw

joinSub

Alternatively, a function may be used to define the derived table:

Complex join conditions are also possible by passing a function as the third parameter:

leftJoin

leftJoinRaw

leftJoinSub

rightJoin

rightJoinRaw

rightJoinSub

crossJoin

crossJoinRaw

Uses the raw SQL provided to as the table for the cross join clause. Cross joins cannot be further constrained with on or where clauses.

crossJoinSub

crossApply

outerApply

newJoin

JoinClause

on

Applies a join condition to the JoinClause. An alias for whereColumn.

orOn

Applies a join condition to the JoinClause using an or combinator. An alias for orWhereColumn.

Preventing Duplicate Joins

You can optionally configure qb to ignore duplicate joins. With this setting turned on each JoinClause is inspected and checked if it matches any existing JoinClause instances on the query. This is useful if you have a table shared between optional constraints and want to ensure it is only added once.

You can opt-in to this behavior by setting preventDuplicateJoins = true in your moduleSettings in config/ColdBox.cfc.