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Expose type modifier in Column struct#1141

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SergeiPatiakin wants to merge5 commits intorust-postgres:masterfromSergeiPatiakin:feat/type-modifier
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1 change: 1 addition & 0 deletionstokio-postgres/src/prepare.rs
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Original file line numberDiff line numberDiff line change
Expand Up@@ -99,6 +99,7 @@ pub async fn prepare(
name: field.name().to_string(),
table_oid: Some(field.table_oid()).filter(|n| *n != 0),
column_id: Some(field.column_id()).filter(|n| *n != 0),
type_modifier: field.type_modifier(),
r#type: type_,
};
columns.push(column);
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6 changes: 6 additions & 0 deletionstokio-postgres/src/statement.rs
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Expand Up@@ -67,6 +67,7 @@ pub struct Column {
pub(crate) name: String,
pub(crate) table_oid: Option<u32>,
pub(crate) column_id: Option<i16>,
pub(crate) type_modifier: i32,
pub(crate) r#type: Type,
}

Expand All@@ -86,6 +87,11 @@ impl Column {
self.column_id
}

/// Return the type modifier
pub fn type_modifier(&self) -> i32 {
self.type_modifier
}

/// Returns the type of the column.
pub fn type_(&self) -> &Type {
&self.r#type
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24 changes: 24 additions & 0 deletionstokio-postgres/tests/test/main.rs
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Original file line numberDiff line numberDiff line change
Expand Up@@ -163,6 +163,30 @@ async fn pipelined_prepare() {
assert_eq!(statement2.columns()[0].type_(), &Type::INT8);
}

#[tokio::test]
async fn prepare_type_modifier() {
let client = connect("user=postgres").await;

let statement = client
.prepare("SELECT $1::BIGINT, $2::VARCHAR(7), $3::VARCHAR(101)")
.await
.unwrap();

let varlena_header_length = 4;
assert_eq!(statement.columns()[0].type_(), &Type::INT8);
assert_eq!(statement.columns()[0].type_modifier(), -1);
assert_eq!(statement.columns()[1].type_(), &Type::VARCHAR);
assert_eq!(
statement.columns()[1].type_modifier(),
7 + varlena_header_length
);
assert_eq!(statement.columns()[2].type_(), &Type::VARCHAR);
assert_eq!(
statement.columns()[2].type_modifier(),
101 + varlena_header_length
);
}

#[tokio::test]
async fn insert_select() {
let client = connect("user=postgres").await;
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