Add named parameter support #23
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type: enhancement
A general enhancement
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mp911de
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Jan 4, 2019
DatabaseClient now supports named parameters prefixed with a colon such as :name in addition to database-native bind markers. Named parameters thus are supported in annotated repository query methods which also increases portability of queries across database vendors.
Named parameter support unrolls collection arguments to reduce the need for argument-specific SQL statements:
db.execute()
.sql("SELECT id, name, state FROM table WHERE age IN (:ages)")
.bind("ages", Arrays.asList(35, 50));
Results in a query: SELECT id, name, state FROM table WHERE age IN (35, 50)
Collection arguments containing nested object arrays can be used to use select lists:
List<Object[]> tuples = new ArrayList<>();
tuples.add(new Object[] {"John", 35});
tuples.add(new Object[] {"Ann", 50});
db.execute()
.sql("SELECT id, name, state FROM table WHERE (name, age) IN (:tuples)")
.bind("tuples", tuples);
translates to: SELECT id, name, state FROM table WHERE (name, age) IN (('John', 35), ('Ann', 50))
schauder
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Jan 10, 2019
Formatting. Made Tests simpler and stricter by using `containsExactly`. Added @test annotation to ignored database specific tests so they actually show up as ignored.
mp911de
added a commit
that referenced
this issue
Jan 11, 2019
DatabaseClient now supports named parameters prefixed with a colon such as :name in addition to database-native bind markers. Named parameters thus are supported in annotated repository query methods which also increases portability of queries across database vendors.
Named parameter support unrolls collection arguments to reduce the need for argument-specific SQL statements:
db.execute()
.sql("SELECT id, name, state FROM table WHERE age IN (:ages)")
.bind("ages", Arrays.asList(35, 50));
Results in a query: SELECT id, name, state FROM table WHERE age IN (35, 50)
Collection arguments containing nested object arrays can be used to use select lists:
List<Object[]> tuples = new ArrayList<>();
tuples.add(new Object[] {"John", 35});
tuples.add(new Object[] {"Ann", 50});
db.execute()
.sql("SELECT id, name, state FROM table WHERE (name, age) IN (:tuples)")
.bind("tuples", tuples);
translates to: SELECT id, name, state FROM table WHERE (name, age) IN (('John', 35), ('Ann', 50))
mp911de
pushed a commit
that referenced
this issue
Jan 11, 2019
Formatting. Made Tests simpler and stricter by using `containsExactly`. Added @test annotation to ignored database specific tests so they actually show up as ignored.
mp911de
added a commit
that referenced
this issue
Jan 11, 2019
mp911de
added a commit
that referenced
this issue
Jan 18, 2019
DatabaseClient now supports named parameters prefixed with a colon such as :name in addition to database-native bind markers. Named parameters thus are supported in annotated repository query methods which also increases portability of queries across database vendors.
Named parameter support unrolls collection arguments to reduce the need for argument-specific SQL statements:
db.execute()
.sql("SELECT id, name, state FROM table WHERE age IN (:ages)")
.bind("ages", Arrays.asList(35, 50));
Results in a query: SELECT id, name, state FROM table WHERE age IN (35, 50)
Collection arguments containing nested object arrays can be used to use select lists:
List<Object[]> tuples = new ArrayList<>();
tuples.add(new Object[] {"John", 35});
tuples.add(new Object[] {"Ann", 50});
db.execute()
.sql("SELECT id, name, state FROM table WHERE (name, age) IN (:tuples)")
.bind("tuples", tuples);
translates to: SELECT id, name, state FROM table WHERE (name, age) IN (('John', 35), ('Ann', 50))
Original pull request: #47.
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We should introduce named parameter support for
DatabaseClientand repositories using a uniform naming pattern to decouple from vendor-specific bind marker syntax.Right now, we need to stick to vendor-specific bind markers if we want to bind parameters to a statement. This makes statements non-portable.
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