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use super::{InformationSchema, SchemaQueryBuilder};
use crate::sqlx_types::{postgres::PgRow, Row};
use sea_query::{Expr, Iden, Query, SeaRc, SelectStatement};
#[derive(Debug, sea_query::Iden)]
pub enum ColumnsField {
TableCatalog,
TableSchema,
TableName,
ColumnName,
OrdinalPosition,
ColumnDefault,
IsNullable,
DataType,
CharacterMaximumLength,
CharacterOctetLength,
NumericPrecision,
NumericPrecisionRadix,
NumericScale,
DatetimePrecision,
IntervalType,
IntervalPrecision,
CollationCatalog,
CollationSchema,
CollationName,
DomainCatalog,
DomainSchema,
DomainName,
UdtCatalog,
UdtSchema,
UdtName,
DtdIdentifier,
IsIdentity,
IdentityGeneration,
IdentityStart,
IdentityIncrement,
IdentityMaximum,
IdentityMinimum,
IdentityCycle,
IsGenerated,
GenerationExpression,
IsUpdatable,
}
#[derive(Debug, Default)]
pub struct ColumnQueryResult {
pub column_name: String,
pub column_type: String,
pub column_default: Option<String>,
pub column_generated: Option<String>,
pub is_nullable: String,
pub is_identity: String,
pub numeric_precision: Option<i32>,
pub numeric_precision_radix: Option<i32>,
pub numeric_scale: Option<i32>,
pub character_maximum_length: Option<i32>,
pub character_octet_length: Option<i32>,
pub datetime_precision: Option<i32>,
pub interval_type: Option<String>,
pub interval_precision: Option<i32>,
}
impl SchemaQueryBuilder {
pub fn query_columns(
&self,
schema: SeaRc<dyn Iden>,
table: SeaRc<dyn Iden>,
) -> SelectStatement {
Query::select()
.columns(vec![
ColumnsField::ColumnName,
ColumnsField::DataType,
ColumnsField::ColumnDefault,
ColumnsField::GenerationExpression,
ColumnsField::IsNullable,
ColumnsField::IsIdentity,
ColumnsField::NumericPrecision,
ColumnsField::NumericPrecisionRadix,
ColumnsField::NumericScale,
ColumnsField::CharacterMaximumLength,
ColumnsField::CharacterOctetLength,
ColumnsField::DatetimePrecision,
ColumnsField::IntervalType,
ColumnsField::IntervalPrecision,
])
.from((InformationSchema::Schema, InformationSchema::Columns))
.and_where(Expr::col(ColumnsField::TableSchema).eq(schema.to_string()))
.and_where(Expr::col(ColumnsField::TableName).eq(table.to_string()))
.take()
}
}
#[cfg(feature = "sqlx-postgres")]
impl From<&PgRow> for ColumnQueryResult {
fn from(row: &PgRow) -> Self {
Self {
column_name: row.get(0),
column_type: row.get(1),
column_default: row.get(2),
column_generated: row.get(3),
is_nullable: row.get(4),
is_identity: row.get(5),
numeric_precision: row.get(6),
numeric_precision_radix: row.get(7),
numeric_scale: row.get(8),
character_maximum_length: row.get(9),
character_octet_length: row.get(10),
datetime_precision: row.get(11),
interval_type: row.get(12),
interval_precision: row.get(13),
}
}
}
#[cfg(not(feature = "sqlx-postgres"))]
impl From<&PgRow> for ColumnQueryResult {
fn from(row: &PgRow) -> Self {
Self::default()
}
}