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Fixed #25476 -- Allowed PostgreSQL introspection to work regardless of table owner.
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@ -149,65 +149,43 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
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Retrieves any constraints or keys (unique, pk, fk, check, index) across one or more columns.
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"""
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constraints = {}
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# Loop over the key table, collecting things as constraints
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# This will get PKs, FKs, and uniques, but not CHECK
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# Loop over the key table, collecting things as constraints. The column
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# array must return column names in the same order in which they were
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# created.
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# The subquery containing generate_series can be replaced with
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# "WITH ORDINALITY" when support for PostgreSQL 9.3 is dropped.
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cursor.execute("""
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SELECT
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kc.constraint_name,
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kc.column_name,
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c.constraint_type,
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array(SELECT table_name::text || '.' || column_name::text
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FROM information_schema.constraint_column_usage
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WHERE constraint_name = kc.constraint_name)
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FROM information_schema.key_column_usage AS kc
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JOIN information_schema.table_constraints AS c ON
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kc.table_schema = c.table_schema AND
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kc.table_name = c.table_name AND
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kc.constraint_name = c.constraint_name
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WHERE
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kc.table_schema = %s AND
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kc.table_name = %s
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ORDER BY kc.ordinal_position ASC
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c.conname,
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array(
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SELECT attname
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FROM (
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SELECT unnest(c.conkey) AS colid,
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generate_series(1, array_length(c.conkey, 1)) AS arridx
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) AS cols
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JOIN pg_attribute AS ca ON cols.colid = ca.attnum
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WHERE ca.attrelid = c.conrelid
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ORDER BY cols.arridx
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),
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c.contype,
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(SELECT fkc.relname || '.' || fka.attname
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FROM pg_attribute AS fka
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JOIN pg_class AS fkc ON fka.attrelid = fkc.oid
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WHERE fka.attrelid = c.confrelid AND fka.attnum = c.confkey[1])
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FROM pg_constraint AS c
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JOIN pg_class AS cl ON c.conrelid = cl.oid
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JOIN pg_namespace AS ns ON cl.relnamespace = ns.oid
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WHERE ns.nspname = %s AND cl.relname = %s
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""", ["public", table_name])
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for constraint, column, kind, used_cols in cursor.fetchall():
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# If we're the first column, make the record
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if constraint not in constraints:
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constraints[constraint] = {
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"columns": [],
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"primary_key": kind.lower() == "primary key",
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"unique": kind.lower() in ["primary key", "unique"],
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"foreign_key": tuple(used_cols[0].split(".", 1)) if kind.lower() == "foreign key" else None,
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"check": False,
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"index": False,
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}
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# Record the details
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constraints[constraint]['columns'].append(column)
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# Now get CHECK constraint columns
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cursor.execute("""
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SELECT kc.constraint_name, kc.column_name
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FROM information_schema.constraint_column_usage AS kc
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JOIN information_schema.table_constraints AS c ON
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kc.table_schema = c.table_schema AND
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kc.table_name = c.table_name AND
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kc.constraint_name = c.constraint_name
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WHERE
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c.constraint_type = 'CHECK' AND
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kc.table_schema = %s AND
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kc.table_name = %s
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""", ["public", table_name])
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for constraint, column in cursor.fetchall():
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# If we're the first column, make the record
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if constraint not in constraints:
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constraints[constraint] = {
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"columns": [],
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"primary_key": False,
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"unique": False,
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"foreign_key": None,
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"check": True,
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"index": False,
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}
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# Record the details
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constraints[constraint]['columns'].append(column)
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for constraint, columns, kind, used_cols in cursor.fetchall():
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constraints[constraint] = {
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"columns": columns,
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"primary_key": kind == "p",
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"unique": kind in ["p", "u"],
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"foreign_key": tuple(used_cols.split(".", 1)) if kind == "f" else None,
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"check": kind == "c",
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"index": False,
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}
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# Now get indexes
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cursor.execute("""
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SELECT
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