Query Operator Functions

Functions
hash< QueryOperatorInfo >	CDSRestDataProvider::query_make_op (string op, auto arg)
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_contains (string str)
	returns an QueryOperatorInfo hash for the "contains" operator with the given argument for use in cds queries
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_eq (auto arg)
	returns an QueryOperatorInfo hash for the "=" operator with the given argument for use in cds queries when comparing column values to immediate values
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_ge (auto arg)
	returns an QueryOperatorInfo hash for the ">=" operator with the given argument for use in cds queries when comparing column values to immediate values
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_gt (auto arg)
	returns an QueryOperatorInfo hash for the ">" operator with the given argument for use in cds queries when comparing column values to immediate values
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_le (auto arg)
	returns an QueryOperatorInfo hash for the "<=" operator with the given argument for use in cds queries when comparing column values to immediate values
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_like (string str)
	returns an QueryOperatorInfo hash for the "contains" operator with the given argument for use in cds queries
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_lt (auto arg)
	returns an QueryOperatorInfo hash for the "<" operator with the given argument for use in cds queries when comparing column values to immediate values
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_ne (auto arg)
	returns an QueryOperatorInfo hash for the "!=" or "<>" operator with the given argument for use in cds queries when comparing column values to immediate values
hash< QueryOperatorInfo >	CDSRestDataProvider::query_op_not (hash arg)
	returns an QueryOperatorInfo hash for the "not" operator; for use in cds queries
hash< string, hash< QueryOperatorInfo > >	CDSRestDataProvider::query_wop_or (hash< auto > h1, hash< auto > h2)
	returns an QueryOperatorInfo hash with a fake "_OR_" column name; the list of arguments to the function is combined such that each hash in the list generates SQL expressions combined with "and" logic, and each of those clauses is combined with "or" logic; this is for use in cds queries

Detailed Description

These are the operators that can be used in CDS queries

• query_op_like(): for the "like" operator
• query_op_ge(): for the ">=" operator when comparing column values to immediate values
• query_op_gt(): for the ">" operator when comparing column values to immediate values
• query_op_le(): for the "<=" operator when comparing column values to immediate values
• query_op_lt(): for the "<" operator when comparing column values to immediate values
• query_op_ne(): for the "!=" or "<>" operator when comparing column values to immediate values
• query_op_eq(): for the "=" operator when comparing column values to immediate values
• query_op_not(): for negating other operators
• query_wop_or(): for combining Query expressions with "or"

Function Documentation

query_make_op()

hash< QueryOperatorInfo > CDSRestDataProvider::query_make_op	(	string	op,
		auto	arg
	)

returns an QueryOperatorInfo hash

query_op_contains()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_contains

(

string

str

)

returns an QueryOperatorInfo hash for the "contains" operator with the given argument for use in cds queries

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Name": query_op_contains("%smith%")});

Parameters

str	the argument for the operator

Returns

an QueryOperatorInfo hash for use in cds queries

query_op_eq()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_eq

(

auto

arg

)

returns an QueryOperatorInfo hash for the "=" operator with the given argument for use in cds queries when comparing column values to immediate values

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Name": query_op_eq("Smith")});

Parameters

arg	the argument for the operator

Returns

an QueryOperatorInfo hash for use in cds queries

query_op_ge()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_ge

(

auto

arg

)

returns an QueryOperatorInfo hash for the ">=" operator with the given argument for use in cds queries when comparing column values to immediate values

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Name": query_op_ge("Apple")});

Parameters

arg	the argument for the operator

Returns

an QueryOperatorInfo hash for use in cds queries

query_op_gt()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_gt

(

auto

arg

)

returns an QueryOperatorInfo hash for the ">" operator with the given argument for use in cds queries when comparing column values to immediate values

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Name": query_op_gt("Apple")});

Parameters

arg	the argument for the operator

Returns

an QueryOperatorInfo hash for use in cds queries

query_op_le()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_le

(

auto

arg

)

returns an QueryOperatorInfo hash for the "<=" operator with the given argument for use in cds queries when comparing column values to immediate values

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Name": query_op_le("Zebra")});

Parameters

arg	the argument for the operator

Returns

an QueryOperatorInfo hash for use in cds queries

query_op_like()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_like

(

string

str

)

returns an QueryOperatorInfo hash for the "contains" operator with the given argument for use in cds queries

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Name": query_op_like("%smith%")});

Parameters

str	the argument for the operator

Returns

an QueryOperatorInfo hash for use in cds queries

query_op_lt()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_lt

(

auto

arg

)

returns an QueryOperatorInfo hash for the "<" operator with the given argument for use in cds queries when comparing column values to immediate values

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Name": query_op_lt("Zebra")});

Parameters

arg	the argument for the operator

Returns

an QueryOperatorInfo hash for use in cds queries

query_op_ne()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_ne

(

auto

arg

)

returns an QueryOperatorInfo hash for the "!=" or "<>" operator with the given argument for use in cds queries when comparing column values to immediate values

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Name": query_op_ne("Smith")});

Parameters

arg	the argument for the operator

query_op_not()

hash< QueryOperatorInfo > CDSRestDataProvider::query_op_not

(

hash

arg

)

returns an QueryOperatorInfo hash for the "not" operator; for use in cds queries

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"name": query_op_not(query_op_eq(name))});

Returns

an QueryOperatorInfo hash for use in cds queries

query_wop_or()

hash< string, hash< QueryOperatorInfo > > CDSRestDataProvider::query_wop_or	(	hash< auto >	h1,
		hash< auto >	h2
	)

returns an QueryOperatorInfo hash with a fake "_OR_" column name; the list of arguments to the function is combined such that each hash in the list generates SQL expressions combined with "and" logic, and each of those clauses is combined with "or" logic; this is for use in cds queries

Example:

AbstractDataProviderRecordIterator i = provider.searchRecords({"Id": id} + query_wop_or({"Type": "C", "ValidationFlag": query_op_ne("Y")}, {"ExpirationFlag": 'Y'}));

Parameters

h1	the first hash of expressions to combine with "or" logic
h2	the second hash of expressions to combine with "or" logic
...	remaining expressions to combine with "or" logic

Returns

a hash with an QueryOperatorInfo hash value keyed by a fake column name ("_OR_" with a numeric prefix for uniqueness) for use in a where operation description hash for use in cds queries

Note

a random prefix is used so that multiple uses of the function can be used to generate a single where clause hash